BARTON Model 224/224C IOM
Contents
1. 2 6 o9 266 2 72 29 v sz GS L 99 9 991 d H urno 8 19 99 VW 119 VA 7 99 2772 99 22 72 99 peoH 1 9uinioA JON 100 w t 689 OONINV 91 6 OONIIAY 91 6 eq 0 1 09 0 0 184 09 0 000 v h v h equi 8 0 974 00 0 requi gpz 0 9 001 0 opty 19945 91 1994S ssejureis riy w b LN 9112 0 194 001 0 81019 I8 1S 000 9 ueq 24 0 ISd 9 0 2 aeq 69 0 Sd 0001 0 eq 972 0 50 0 0 1 15 09 0 20 ueq 9 zZ 0 189 00t 0 0 ueq 279 0 56 0 equ 691 0 9 09 0 918 leis 59985 0 1 sd 09 0 81019 I8 1S pelos pio LAN LAN 0 9 8 co 4 81013 1921 006 69 92 91 0 I M9IN 1900020 000 L 0 04 TaN SIL eq 0 154 009 0 1eq 9 0 50 0 1eq 0 sd 09 0 91 5 5 ve t 9 2 0 sd 007 0 ueq 29 0 159 19 0 jequi 91 0 0 81010 I8 1S pelos 00 eq 0 sd 005 0 eq 9 0 50 0 eq 17 0 159 09 0 citvcLa WIS v ve 922 0 159 007 0 22 0 Sd 19 0 jequi 6 0 A 0 0 sseig 4 00 8 6 uuu 6 GO2. 6 6 8 6 8 9 20078 E lt Aqu 1eddo I uooul awe 1198 I 2 22 1915 ssojureys SNOILO3NNOO 4 S39NV3 3n sSS3d TVILN323343IG 3 18V IVAV 290 suopeoypads ebues reuerew 2902 22 71 IaeL 2 191 5 1 v 7VLOL SIN 1 4 Theorv of Operation The M224 224C DPU measures the differential pressure DP in a process system relative to process functions and produces a mechanical output that actu ates process monitoring instruments and process control devices LP Connection HP Connection Torque Tube Garter Plate High Pressure Low Pressure High Pressure Low Pressure Range Spring Amm auti ud Range Spring Temperature Figure 1 1 DPU Components The high pressure HP housing is connected by pipe or tubing to the high pres sure side of the primary device The low pressure LP housing is connected to the low pressure side of the primary device Any pressure changes within the housings causes the bellows to move in the direction of least pressure As the bellows move laterally the connecting drive arm follows the motion of the bellows and twists the torque tube The torque tube shaft which is freely supported within the torque tube at its outer end but attached to the to
3. 4 WARNING DO NOT REUSE HOUSING BOLTS SEE HOUSING BOLT WARNING ON PAGE 20 CAUTION DPU pressure rating has been determined using standard methods without specific considerations for corrosion internal or external or fatigue The system designer should appropriately derate any DPU where these considerations are significant issues Do not subject DPU to unnecessary shock overrange pressure during operation CAUTION DPU bellows protects torque tube from exposure to process fluid Cyclic conditions can cause undetected bellows failure resulting in exposure of the torque tube to the process fluid NOTICE Do not share filling or vapor return lines with DPU piping lines Standard Piping Practices observe when installing piping 1 10 Shorten distance between primary device and DPU as much as possible Distances exceeding 100 feet are not recommended For distances up to 50 feet use 1 4 inch pipe or tubing For runs 50 to 100 feet use 1 2 inch pipe or tubing The recommended limitation does not apply if an air purge or blow back system is used Slope all piping at least 1 inch linear foot to avoid liquid gas entrapment Provide two feet of un insulated piping between the DPU and the primary device for each 100 degrees in excess of 180 F 162 C if process media exceeding 200 F 93 3 C must be measured Assure that the temperature of the DPU never exceeds 180 F 162 O When steam tracing is necessary the steam
4. CAMERON Measurement Systems MODEL 224 224C DIFFERENTIAL PRESSURE UNIT DPU M224C for Industrial Service and Barton brand M224 non C for Nuclear Service Installation Manual Replaces Supersedes ID 10085 Part No 10087 Rev 01 July 2007 This manual is for DPU only see separate instrument manual CONTENTS PE PAGES scsi TEE Page 2 Section 1 Introduction 1 1 Page 3 1 2 Produet Deseripli hh 3 1 3 Specifications terree ci Td ves 3 Table 1 1 DPU Material Range Specifications Page 4 1 4 Theory of Operation Page 5 Section 2 Installation 2 1 General re ee eR Page 7 2 2 DPUMOUnDLBS e rie o RE eoe dens Page 7 2 3 DPU uu ua pasasqaku Page 7 2 4 DPU Piping Startup Examples Page 9 Section 3 Maintenance and Calibration 3 1 Required Page 19 3 2 Test Calibration 19 3 3 Preventative Paqe 19 3 4 Calibrallofi tenerent Page 19 3 5 DPU Page 19 A Pressure Check u op e tisse pad nh en Page 20 B Cleaning an
5. 1675C SST 500 1500 psi Seal Welded 1 2 NPT Ports 0 SST 500 1500 psi 3 8 NPT Ports 0224 1721C SST 500 1500 psi 1 2 NPT Ports NACE 0224 1697C SST 500 1500 psi 1 4 NPT Ports NACE 0224 1621C SST 500 1500 psi Seal Welded 1 4 NPT Ports 0224 1622C SST 500 1500 psi 1 4 X 1 2 NPT Ports NACE 0224 1626C SST 3000 6000 psi 1 4 NPT Ports 0224 1556C SST 3000 6000 psi 1 2 NPT Ports 0224 1580C SST 3000 6000 psi 1 4 X 1 2 NPT Ports 0224 1608C SST 3000 6000 psi Seal Welded 3 4 0224 1641C SST 3000 6000 psi 9 16 AMINCO Ports 0224 1645C SST 3000 6000 psi 1 4 X 1 2 Ports Nipple 0224 1647C Mod 31 224 224C DPU Parts List See Notes and NOTICE page 33 Cont Table 6 1 224 224C DPU Parts List Continued Item Description Part Number Qty 19 Housing Pressure See Note 5 Continued 2 224 Non C Version DPU See Note 3 Continued SST 3000 6000 psi 1 4 X 1 2 NPT Ports 0224 1637C NACE Cu Ni 1000 psi 1 4 NPT Ports 0224 1581C Cu Ni 1000 psi 1 4 X 1 2 NPT Ports 0224 1616C Cu Ni 1000 psi Absolute No Ports 0224 1651C Cu Ni 1000 psi 1 2 NPT Ports 0224 1655C Monel 3000 psi 1 4 X 1 2 NPT Ports NACE 0224 1685C Monel 3000 psi 1 4 X 1 2 NPT Ports 0224 1687C Monel 3000 psi 1 2 NPT Ports 0224 1696C 20 Spacer DPU Mounting 0224 1547C 21 Bolt Housing Refer to Table 4 Refer to Housing Bo
6. 3 Close bypass and shutoff valve on reference leg 4 Remove plug from the top port in 2 inch pipe cross connection and fill the reference leg manually REFERENCE LEG SHUT OFF VALVES 5 Open top shutoff valve and crack vent valve until KOSE bubbles are expelled Leave the reference leg full DPU 6 Replace plug in pipe cross BYPASS HIGH PRESSURE dcl t valve Figure 2 10 DPU Below 7 Slowlv open upper block valve Tank w Ref Lea Hot Liquids Volatile 1 Open both shutoff valves bypass valve and vent valve 2 Remove plug from the top port in 2 inch pipe cross Fill both high and low DPU housings with liquid until it runs out of vent valve Use liquid to be measured cooled below 200 F 93 3 C or other suitable seal liquid Expel bubbles in DPU housing continued on next page 2 4 DPU Piping Startup Examples Continued Review all WARNINGS CAUTIONS AND NOTICES pages 7 and 8 before installation or startup J DPU Below Tank with Reference Leg Continued Hot Liquids Volatile Continued 3 Close bypass and shutoff valve on reference leg 4 Remove plug from top port in 2 inch pipe cross connection and fill reference leg manually 5 Open top shutoff valve and crack vent valve until bubbles are expelled Leave reference leg full 6 Replace plug in pipe cross and close vent valve 7 Slowly open upper block valve NOTICE Do not share filling or vapor return lines with DPU pipi
7. Note 1 and under the head of the MP35N bolts 5 Denotes for commercial applications only 6 For reference only 400 psi ALUM housing is obsolete 21 3 5 DPU Cleaning and Inspection Continued See WARNINGS on pages 19 and 20 before proceeding B Cleaning Inspection Procedure Continued 6 Continued Review Housing Bolt WARNING page 20 before proceeding Table 3 1 Bolt Torque Ratings Continued MATL MATL 3 000 STEEL STEEL 3 8 24 x 2 5 3 000 17 4 PH 3 8 24 x 1 5 3 000 17 4 PH 3 8 24 x 3 0 A286 3 000 S Salt Spray amp 3 8 24x2 5 NACE S TORQUE ROTATION LB FT Degrees Note 2 Note 3 3 4 3 34 36 3 3 4 3 4 0 0 5 5 0 LUBE PARTNO Note 1 0220 0022J 0220 1028J 0220 1015J 0220 1111J 3 000 5408 00652 STEEL NACE 3 8 24 x 2 1 2 3 000 sr 17 4 PH 3 8 24 x 2 5 3 000 MONEL 17 4 PH 3 8 24 x 2 5 A286 3 000 MONEL SaltSpray amp x2 5 NACE 6 000 STEEL STEEL 3 8 24 x 2 5 5 5000 324x265 ves 6 MP35N 6 000 Salt Spray 3 8 24 x 2 5 Note 4 50 52 Notes 1 Lubricant Lightly apply Molykote G n paste 0002 0010U on the first two threads only unless other wise specified do not lube bearing surface Special applications such as Nuclear Cryogenic and oxygen services may require special lubricants Check BOM for specifics such as thread head and gasket surfaces 2 Torque on bolts is accomplished in 3 or 4 steps Tighten uniformly 3 C
8. psi 1 4 NPT Ports 224C 1120C Steel 3000 6000 psi 1 2 NPT Ports 224C 1128C 29 224 224C DPU Parts List See Notes and NOTICE page 33 Cont Table 6 1 224 224C DPU Parts List Continued Item Description Part Number Qty 19 Housing Pressure See Note 5 Continued 224C DPU Continued Steel 10 000 psi 1 4 NPT Ports 224C 1049C Steel 10 000 psi 9 16 AMINCO Ports 224C 1189C Cu Ni 1000 psi 1 4 NPT Ports 224C 1021C Cu Ni 1000 psi 1 2 NPT Ports 224C 1022C Cu Ni 1000 psi 1 8 NPT Ports 224C 1292C SST 500 1500 psi 1 2 NPT Ports 224C 1032C SST 500 1500 psi 1 4 NPT Ports 224C 1033C SST 500 1500 psi 3 8 NPT Ports 224C 1036C SST 500 1500 psi 1 8 NPT Ports 224C 1238C SST 500 1500 psi 1 4 NPT Ports NACE 0224 1621C SST 500 1500 psi 1 4 X 1 2 NPT Ports NACE 0224 1626C SST 500 1500 psi 1 2 NPT Ports NACE 0224 1697C SST 3000 6000 psi 1 4 NPT Ports 224C 1040C SST 3000 6000 psi 1 2 Ports 224C 1041C SST 3000 6000 psi 1 4 X 1 2 NPT Ports 224C 1042C SST 3000 6000 psi 9 16 AMINCO Ports 224C 1187C SST 3000 6000 psi Seal Welded 3 4 0224 1641C SST 3000 6000 psi 1 4 X 1 2 NPT Ports 0224 1637C NACE Monel 3000 psi 1 4 X 1 2 NPT Ports 224C 1028C Monel 3000 psi 1 2 NPT Ports 224C 1029C Monel 3000 psi 1 4 NPT Ports 224C 1121C Monel 3000 psi 1 4 X
9. s manual for particular components that must be removed to gain access to the DPU mounting fasteners 3 Perform Pressure Check Procedure A under DPU Cleaning and Inspec tion on page 20 If internal pressure was found do not continue this procedure 4 Remove pressure housing bolts and pressure housings NOTICE It is recommended that new O Rings be used whenever pressure hous ings are replaced 5 Install the pressure housings onto the new BUA and attach with appropriate housing bolts see Table 3 1 for torque requirements 6 Re attach DPU See para 3 7 page 24 for procedure to the actuated instrument NOTICE Drive Arm Torque Tube Tightness Test For nuclear seismic high impact qualified units a tightness test must be performed whenever a DPU is attached to an instrument See para 3 8 page 24 for specific instructions 7 Install the assembled instrument into service in reverse order of removal and calibrate per separate actuated instrument manual 23 3 7 Attaching Drive Arm to Torque Tube NOTICE See separate actuated instrument manual for instrument specific details Drive Arm Assemblv Procedure LINK SINTERED CLAMP BLOCK 03 approx 21 224 224 LINK SLOTTED CLAMP BLOCK S CLAMP 3 32 ALLEN SHAFT SCREW S WRENCH 1 8 WRENCH 0163 0044C TIGHTEN CLAMP wy SHAFT SCREW TO TIGHTEN Figure 3 2 Attaching Drive Arm to Torque Tube 1 Slip drive a
10. startup Flow Applications pages 9 13 HP High Pressure Ensure DPU HP housing is connected to the primary device upstream tap NOTICE To prevent overheating DPU during blow down operator should monitor temperature by placing his hands on pipe between DPU and the manifold pipe containing the vent valves Liquid Level Applications pages 13 16 The process media may be used as a reference leg seal fluid when it is of a type that will condense in the reference leg under all conditions If the process or process media characteristics are such that the above conditions cannot be met a special reference leg seal fluid will be required If special seal fluid media characteristics are such that the above conditions cannot be met a special reference leg seal fluid will be required The spe cial seal fluid must not be volatile and must not be miscible with the process media The difference in densities special seal fluid vs process media will require compensation in calculating differential pressure range of the DPU Liquid Specific Gravity Applications page 17 This method of piping is used for determining specific gravity changes in a process media using differential pressure instruments A Gas Flow DPU Above Run Recommended for use whenever possible as the DPU is self draining However NOT recommended when hydrates are present 1 Open bypass valve s and close vent valve 2 Open both shutoff valves and one block valve to pres
11. 000 psi The range springs of these BUAs are grouped around the outside of the bellows and must be of a material that is compatible with the liquid being measured A CAUTION Ambient temperatures below 40 F should never be allowed for water filled D fill units 224 224C DPU Specifications Ajuo suoneoi dde eorues oyioeds 10 9 uoN I poNW 1s nb i uodn sjeuejeui juerduioo G7 0 JW 3DVN OvzzIA ejeurxoadde suoiseAuoo OLA 15 uodn suino 1s nb i uodn 219 q N V VIN sqnis Buipjew suonoeuuoo sed pue sezis 19440 equi g Lp ISd 009 01 uequu GZ 9 0 01055020 eynjosqy 2 0 26 A St 0 SL 10 equ GJ 0 SZ 9 M 0 0 0 peuepuo eq eBuei Gp L 0 274 09 0 e Japso jeroeds uo e qejre e seBuei 145 10 16 ueo 0107 S JON uoneuuojui jeuonippe 10 006 7 un llnq 59 seuoys s1ojeoipu qq ees 01055020 IIN Jo 20 Ajliqejeede 1ed Ajueeuj uoN 2 28 4 081 01 07 0 siur enjgjeduie no g eqn enbJo 901 8 uonejos eqn enbJo e ueuuojJ4ad 99 L0 Sz0 0 6v 0 00 99 670 0 0 2 0 gz 0 Ie e1 9 10 urno jueureoejdsiq 60
12. 1 2 NPT Ports NACE 0224 1685C K Monel 10 000 psi 9 16 AMINCO Ports 224C 1215C 224 Non C Version DPU See Note 3 Brass Forged 500 psi Absolute No Ports 0224 1602C Brass Forged 500 psi 1 4 NPT Ports 0224 1532C Brass Forged 500 psi 1 8 NPT Ports 0224 1606C Steel 500 1500 psi 1 4 NPT Ports 0224 1576C 30 224 224C DPU Parts List See Notes and NOTICE page 33 Cont Table 6 1 224 224C DPU Parts List Continued Item Description Part Number Qty 19 Housing Pressure See Note 5 Continued 224 Non C Version DPU See Note 3 Continued Steel 500 1500 psi 1 2 NPT Ports 0224 1577C Steel 500 1500 psi Absolute No Ports 0224 1664C Steel 500 1500 psi 3 8 NPT Ports 0224 1667C Steel 500 1500 psi 1 4 X 1 2 NPT Ports 0224 1613C Steel 3000 6000 psi Absolute No Ports 0224 1715C Steel 3000 6000 psi 1 4 NPT Ports 0224 1555C Steel 3000 6000 psi 1 2 NPT Ports 0224 1578C Steel 3000 6000 psi 1 4 X 1 2 NPT Ports 0224 1607C Steel 10 000 psi 1 4 NPT Ports 0224 1662C Steel 10 000 psi 9 16 AMINCO Ports 0224 1663C SST 500 1500 psi 1 4 NPT Ports 0224 1543C SST 500 1500 psi 1 2 NPT Ports 0224 1579C SST 500 1500 psi 1 4 X 1 2 NPT Ports 0224 1610C SST 500 1500 psi Absolute No Ports 0224 1618C SST 500 1500 psi 1 4 NPT Ports Nipple Mod 0224 1619C SST 500 1500 psi 1 8 NPT Ports 0224
13. EASE OF INTERNAL PRESSURE This procedure should be performed prior to removing the DPU housing bolts especially if the DPU has been installed in gas applications with work ing pressures greater than 200 psig 1 Back off all housing bolts 4 turns 2 Check for internal pressure by attempting to move the housing in and out along the bolts a If the housing moves freely no pressure is present servicing or repair may continue b If the housing does not move freely the bellows may be pressur ized and is POTENTIALLY HAZARDOUS if further disassembled Tighten the bolts and return the unit to the factory or authorized service center for repair Tag the unit and specify Gas in Bellows Cleaning Inspection Procedure Instruments used in services where solids or semi solids may accumulate inside the pressure housings require periodic inspection and cleaning as follows 1 Remove the DPU from service and remove the pressure housings 2 Carefully remove the pressure housings from the bellows unit assembly NOTICE If the accumulation of material inside the housing is extensive rapid removal of the housing may damage the bellows convolutions 3 5 DPU Cleaning and Inspection Continued See WARNINGS on pages 19 and 20 before proceeding B Cleaning Inspection Procedure Continued 3 Remove the accumulation from between the bellows convolutions and from the inside of the housings Use a solvent if possible Do n
14. ESSURE CONNECTION SPACER 251 6 4 249 6 3 04 1 0 3 16 4 81 BOTTOM PRESSURE CONNECTION 756 19 21 738 18 7 SIDE VIEW WALL OR YOKE MOUNTING Figure 5 1 224 224C Dimensional Drawing Part 1 of 2 based on 224C 12303 Rev 00 26 4X 0 3 8 9 5 P 1 2 88 9 REAR VIEW 3 1 2 mar Lia 21716 171 4 BOTTOM VIEY i WALL OR YOKE MOUNTING 076 1 93 075 1 811 N 500 0 1500 5 4 101 61 4 3 8 111 1 2 1 4 2 3 4 S7 2 69 8 7 16 MS 3000 TD 10 000 PSI 1 8 NPT SHAFT ROTATION SPECIFY STANDARD COUNTERCLOCKWISE B OPTIONAL CLOCKWISE UNIT WITH COUNTERCLOCKWISE ROTATION SHOWN FOR CW ROTATION HIGH amp LOW PRESSURE HOUSINGS ARE CHANGED N PROVIDE 19 32 15 11 DIA CLEARANCE HOLE FOR 1 2 3 ALL STANDARD PIPE FITTINGS FURNISHED BY CUSTOMER AX SUITABLE FOR USE WITH AMINCO FITTINGS AMERICAN INST CO SILVER SPRINGS M OR EQUAL N CAN BE REVERSED WHEN ORDERED OR CAN BE ROTATED 180 IN THE FIELD NOTES Figure 5 1 224 224C Dimensional Drawing Continued Part 2 of 2 based on 224C 12303 Rev 00 27 SECTION 6 PARTS DRAWING LIST FORGED BRASS FORGED BRASS Figure 6 1 224 224C DPU Parts Drawing 28 224 224C DPU Parts List See Notes and NOTICE page 33 Table 6 1 224 224C DPU P
15. U or instrument NOTICE Use Identical Replacement Parts Always replace parts with identical parts same material rating s certs size etc unless otherwise directed by Cameron 33 34 Blank Page Product Warranty A Warranty Cameron International Corporation Cameron warrants that at the time of shipment the products manufactured by Cameron and sold hereunder will be free from defects in material and workmanship and will conform to the specifications furnished by or approved by Cameron Warranty Adjustment 1 If any defect within this warranty appears Buyer shall notify Cameron immediately 2 Cameron agrees to repair or furnish a replacement for but not install any product which within one 1 year from the date of shipment by Cameron shall upon test and examination by Cameron prove defec tive within the above warranty 3 No product will be accepted for return or replacement without the written authorization of Cameron Upon such authorization and in accordance with instructions by Cameron the product will be returned shipping charges prepaid by Buyer Replacements made under this warranty will be shipped prepaid C Exclusions from Warranty 1 THE FOREGOING WARRANTY IS IN LIEU OF AND EXCLUDES ALL OTHER EXPRESSED OR IMPLIED WARRANTIES OF MERCHANTABIL ITY OR FITNESS FOR A PARTICULAR PURPOSE OR OTHERWISE Components manufactured by any supplier other than Cameron shall bear o
16. ack and close shutoff valves BLOCK alternately until liquid is free VALVES of bubbles and spills out of both upper DPU body ports Figure 2 5 Steam Flow 4 Close vent valves or tighten plugs Close DPU Above Run block valves and open shutoff valves 5 The pointer will rest at zero or output will be 4 mA or 10 mA as appli cable If not and no leaks are detected the housing and or piping are not completely filled with liquid Repeat steps 1 through 4 until output remains stationary at the lowest value 11 2 4 DPU Piping Startup Examples Continued Review all WARNINGS CAUTIONS AND NOTICES pages 7 and 8 before installation or startup 6 Slowlv open both block valves and close bvpass valve F Liquid Flow DPU Below Run The following steps are recommended for hot or gassy liquids Periodic inspections of piping are PRIMARY DEVICE recommended FILL TEE AND 1 Close both shutoff valves VENT VALVE FOR HOT OR and open both block GASSY LIQUIDS valves SHUT OFF 2 Open bypass valve Crack VALVES vent valves or loosen plugs from top ports of BYPASS DPU pressure housings VALVE 3 Crack and close shutoff valves alternately until the 2 6 Lic Fl igure 2 6 Liq Flow liquid is free of bubbles and spills out of both DOO upper DPU body ports 4 Close vent valves or tighten plugs Close block valves and open shutoff valves 5 The pointer will rest at zero or output will be 4 mA or 10 mA as appli cable If no
17. ale differential pressure 100 of the full scale range This achieves 8 degree of torque tube drive shaft equivalent torque onto the connection Observe shift in unit zero following DPU depressurization as required and drive arm stop bracket readjusting to allow free movement of the drive arm and pointer A downscale counter clockwise shift in zero of greater than 1 2 is indicative of drive arm slippage necessitating further clamp block tightening 24 SECTION 4 TROUBLESHOOTING Table 4 1 Troubleshooting Possible Problem Sources Probable Cause Corrective Action Orifice Installed Backwards or Oversized Replace Orifice Primary Flow Blocked Upstream from Run Clean Out Run or Open Valve PEU Or Loss of Liquid in Reference Leg Liquid Level Refill Reference Leg Density Changes in Process Media or Refill Reference Leg with Same Reference Leg Density Liquid as Process Media Pressure tap holes plugged and or Piping 25 Plugged Clean Out Piping Piping from Bypass Valve Open or Leaking roe Bypass Valve s or Repair Low or No eens Indication to Liquids or Gases Trapped in Piping Vent Piping Block or Shuf off Valves Closed Open Block or Shut off Valves Piping Leaks on High Pressure Side Repair Leaks Housings Filled Up with Solids Restricting Bellows Movement Clean Out Housing Gas Trapped in Housing in Liquid Service or Liquid Trapped in Housing in Gas Service Bel
18. ameron recommends using a torque wrench whenever installing housing bolts Rotation of bolt head is measured after bolt is snug approx 1 16 turn past head contact with approximately 2 LB FT torque Do not exceed this rotation To tighten bolts without torque wrench use rotation values 4 Lube threads per Note 1 and under the head of the MP35N bolts 5 Denotes for commercial applications only 6 For reference only 400 psi ALUM housing is obsolete 0220 1014J 0220 1014J 0220 1111J 19 21 0220 0022J NO YES YES YES NO YES YES YES NO ES ST ST ST ST ST ST 0220 1014J ST 0220 1109J 22 3 6 Servicing Range Change To change the range of the DPU the bellows unit assembly BUA must be replaced with a unit of the desired range BUA Replacement WARNING REVIEW ALL WARNINGS CAUTIONS AND NOTICES UNDER DPU CLEANING AND INSPECTION PAGES 19 AND 20 BEFORE PERFORMING THIS PROCEDURE NOTICE Do not loosen drive arm hold plug located on the top of the BUA center plate when removing the mounting bracket If the plug is loosened the fill fluid in the bellows will be lost and the unit will be rendered inoperable 1 Disconnect the DPU piping remove the instrument from service and remove the mounting bracket from the DPU 2 Loosen the actuated instrument drive arm and separate it from the torque tube shaft Do not disconnect the actuated instrument linkage NOTICE See the actuated instrument
19. ange any of the settings during examina tion or accuracy will be affected For applications requiring special cleaning precautions a polyethylene bag is used to protect the instrument from contamination This bag should be removed only under conditions of extreme cleanliness 2 2 DPU Mounting A Flush or Panel 1 Cutan opening in the panel and drill four holes 17 64 per outline dimension drawings in Section 5 2 Pass the instrument through the cutout in the panel from panel front 3 Attach the indicator to the panel with four screws C Pipe Refer to Section 5 The unit must be mounted approximately level for proper operation 2 3 DPU Piping N WARNING HIGH PRESSURE HAZARD TO PREVENT PERSONAL INJURY OR DAMAGE TO EQUIPMENT DIRECT ALL PIPING AWAY FROM THE OPERATOR WHILE CONNECTING THE DPU TO THE SYSTEM PIPING WARNING EXPLOSION HAZARD NO ORGANIC COMPOUNDS OIL GREASE DIRT OR SCALE OF ANY KIND CAN BE TOLERATED IN AN OXYGEN INSTALLATION WARNING FORINSTALLATIONS WHERE THE PRESSURE COULD EXCEED THE RATED MAXIMUM SAFE WORKING PRESSURE OF THE DPU THE PIPING SYSTEM MUST INCLUDE PROTECTIVE MEASURES TO PREVENT OVER PRESSURE IN ACCORDANCE WITH APPLICABLE LOCAL AND NATIONAL PIPING CODES WARNING THE MODEL 224 224C DPU IS NOT DESIGNED FOR HIGH STATIC OR DYNAMIC LOADS AT IMPULSE LINE CONNECTIONS THE IMPULSE PIPING SYSTEM MUST BE DESIGNED WITH ADEQUATE SUPPORTS TO MINIMIZE THE LOADS AT THE DPU 2 3 DPU Piping Cont
20. arts List Item Description Part Number Qty 1 Bellows Unit Assembly 3 4 or 5 8 Specify 2 Bellows Unit Assembly 1 5 8 Specify 5 3 Spacer Bracket 0224 0302C 1 4 O Ring Housing Gasket 2 Buna N 0001 0028R Viton 0001 0039R Viton NACE 0001 1164R Viton 10 000 psi units only 0001 0062R EPT 0001 1054R 5 Bracket Mounting Not for use with Brass Housings 0273 0001C 2 6 Nut Hex Steel 5 16 18 CP 0500 0033J 4 7 Washer Split Lock 5 16 Steel 0003 0006K 4 8 2 Pipe Mounting Kit w U bolts Nuts amp Washer 0440 0001J 2 9 Not Used 10 Screw Hex Hd 1 4 28 x 1 2 0116 1011J 8 11 Screw Rd Hd Steel CP 10 32 x 3 8 0111 0057J 4 12 Bracket Flush 500 psi Forged Brass only 0224 0235B 1 13 Screw Fil Hd SST 10 32 x 1 2 0114 0031J 4 14 Washer Split Lock 10 SST 0003 0032K 4 15 Bracket Universal Mounting Wall or Yoke Mtg 0273 0003C 1 16 Hex Steel CP 1 4 28 0500 0011J 4 17 Washer Lock Ext Tooth SST 1 4 0003 0068K 12 18 Screw Fl Hd Steel CP 1 4 28 x 1 2 0112 0018J 4 19 Housing Pressure See Note 5 2 224C DPU Brass Forged 500 psi 1 4 NPT Ports 224C 1016C Brass Forged 500 psi 1 8 NPT Ports 224C 1018C Steel 500 1500 psi 1 4 NPT Ports 224C 1113C Steel 500 1500 psi 1 4 X 1 2 NPT Ports 224C 1123C Steel 500 1500 psi 1 2 NPT Ports 224C 1130C Steel 3000 6000 psi 1 2 X 1 4 NPT Ports 224C 1108C Steel 3000 6000
21. bined 224 and 224C replaces 10080 Add ID 10087 224 DPU information to Section 6 04C50b 8 03 Produced separate manual under Barton brand for Nuclear Government ID 10085 Service No Tech Changes from ID 10085 Examples para 2 4 Rev housing bolt caution to warning page 8 Rev Figure 6 1 non technical changes throughout 06C75m 4 06 Eliminated separate Barton brand manual ID 10085 Rev Safety C ID 10087 Ver statements Rev Tables 1 1 3 1 and 6 1 Added Piping Startup 06D76a 4 06 Removed Government Service designation No Tech Changes 01 7 07 Revised corporate name logo contact information to reflect Cameron ownership SECTION 1 INTRODUCTION 1 1 General The Model 224 224C Differential Pressure Unit DPU is a mechanical device that measures differential pressure relative to a gas or liquid flowing through a process system or to the level of a liquid contained in a process vessel For process flow measurements the DPU is connected across a primary device e g venturi orifice plate or flow tube located in the process system For liquid level measurements the DPU may be connected in a variety of ways to measure the difference in pressure caused by variations in the level of the liquid in the process vessel 1 2 Product Description The Model 224 224C DPU is a dual bellows assembly enclosed within pressure housings The dual bellows assembly consists of two opposing internally con nected liquid fi
22. d Inspection Procedure Page 20 Table 3 1 Bolt Torque Ratings Page 21 22 3 67 SerVICIDO eise RE uen e ute ien desee Seas Page 23 3 7 Attaching Drive Arm to Torque Page 24 3 8 Drive Arm Tightness Test Page 24 Section 4 Troubleshooting Table 4 1 Troubleshooting Page 25 Section 5 DimensiOfiS k anu qa este vao coe Page 26 27 Section 6 Parts Drawing Listf gt a Page 28 Before installing this instrument become familiar with the installation instructions Section 2 and in the separate instrument manual DANGER notes indicate the presence of a hazard which will cause severe personal injury death or substantial property damage if warning is ignored WARNING notes indicate the presence of a hazard which can cause severe personal injury death or substantial property damage if warning is ignored CAUTION notes indicate the presence of a hazard which will or can cause moderate personal injury or property damage if warning is ignored DANGER WARNING and or CAUTION notes that appear on the following pages of this manual should be reviewed before proceeding 3 7 8 19 20 and 23 Important Before installing or operating this instrument review all safety notices contained in the separat
23. e actuated instrument manual PRODUCT WARRANTY STATEMENT Product warranty for this instrument is as stated on the back cover of this manual NOTICE DPU warranty will be voided if the following limitations are exceeded Temperature Do not subject the DPU to temperatures above 200 F or below 60 F 40 F minimum for water filled units Pressure Do not subject the DPU to operating pressures in excess of the working pressure rating stamped on the unit or attached dataplate Corrosion Do not subject the DPU to incompatible process media Sealed Components Do not loosen or remove the torque tube gland nut the drive arm hole plug or the torque tube housing from the centerplate To do so will cause loss of bellows fill fluid and render the unit inoperable Vibration Shock Do not subject the DPU to severe mechanical or hydraulic shock C VERSION DESIGN CHANGE The 224C is a redesigned version of the 224 DPU The C version is identical in func tion performance installation and operation to the previous version redesign was for improved manufacturing only This design change does not affect the instrument being actuated Barton brand Model 224 Non C DPU configurations are for Nuclear service only RECORD OF CHANGES VERSION DESCRIPTION initial issue 95E1 5 95 01D18d 4 01 Revised to Booklet Format 03G50c 7 03 Rev Co Name Logo Rev Sections 1 2 amp 3 for PED compliance 03H50b 8 03 Rev Spec Table 1 1 Com
24. e and crack vent valve BLOCK VALVE SHUT OFF VALVE 2 Slowly open lower shutoff valve When bubble free liquid spills from vent DPU close vent valve BLOCK VALVE continued on next page DRAIN SHUT OFF VALVE VALVE HIGH PRESSURE 13 2 4 DPU Piping Startup Examples Continued Review all WARNINGS CAUTIONS AND NOTICES pages 7 and 8 before installation or startup L 14 Cool Non Condensing Liquid DPU Below Tank Continued 3 Open upper block valve and slowly open shutoff valve 4 Crack drain valve to remove any condensation and close drain valve NOTICE Do not share filling or vapor return lines with DPU piping DPU Below Tank with Reference Leg Cool Liquids Use of reference leg cancels out the dead leg piping from the tank bottom to center line of meter body Seal fluid in reference leg must not volatilize Process media can be used as a reference leg seal fluid if it is such that it will condense in reference leg under all conditions Otherwise special immiscible seal fluid must be used Difference in densities between process media and seal fluid must be considered when computing differen tial pressure range of DPU 1 Partially fill reference leg by opening bottom block valve both shutoff valves and bypass valve 2 Crack drain plugs on the LIQUID LEVEL APPLICATIONS DPU housing and vent the TYPICAL PIPING DIAGRAM valve Close when clear 2 CROSS bubble free liquid flows
25. essary e DPU Inspection and Cleaning See DPU Cleaning and Inspection Proce dure that follows 3 4 Calibration For calibration procedures refer to separate actuated instrument manual 3 5 DPU Cleaning and Inspection N WARNING High Pressure Gas Installations with pressures greater than 200 psig HIGH PRESSURE GAS HAZARD ON DISASSEMBLY OF DPU TO PREVENT POSSIBLE SEVERE PERSONAL INJURY DEATH OR SUBSTANTIAL PROPERTY DAMAGE DUE TO THE RELEASE OF INTERNAL PRESSURE PERFORM THE PRESSURE CHECK PROCEDURE THAT FOLLOWS Step A BEFORE REMOVING THE DPU HOUSING BOLTS WARNING THE DPU MAY BE UNDER PRESSURE ENSURE THAT THE PIPING SYSTEM IS COMPLETELY DEPRESSURIZED BEFORE REMOVING THE METER FOR MAINTENANCE OR INSPECTION Continued on next page 19 3 5 DPU Cleaning and Inspection Continued A 20 See WARNINGS on page 19 before proceeding WARNING Housing Bolts DO NOT REUSE HOUSING BOLTS IF BOLTS ARE DISTURBED REPLACE WITH NEW BOLTS PER TABLE 3 1 REUSE OF HOUSING BOLTS ESPECIALLY IN CRITICAL APPLICATIONS LIKE HYDROGEN SULFIDE AND SALT WATER EXPOSURES CAN RESULT IN SEVERE INJURY DEATH OR SUBSTANTIAL PROPERTY DAMAGE DUE TO BOLT FAILURE NOTICE If accumulation of solids or semi solids is extensive remove the housings carefully to prevent damage to the bellows Pressure Check WARNING FAILURE TO PERFORM THIS PROCEDURE CAN RESULT IN SEVERE INJURY DEATH OR SUBSTANTIAL PROPERTY DAMAGE DUE TO THE REL
26. gs Replace fill pluos Open and close block valves Check for piping leaks repair as needed 39 709 cul Close shutoff valves and open block valves 10 Slowly open both shutoff valves and close bypass valve H Cool Non Condensing Liquid DPU Level with Tank Bottom High pressure side of DPU is connected to bottom outlet of tank The low pressure side is connected to top or gas outlet of tank NOTICE Do not share filling BLOCK VALVE or vapor return lines with DPU Figure 2 8 Cool piping Non Condensing Liq The following steps are suitable for piping layout for water oil or other media that will not con dense in low pressure piping 1 Close both shutoff valves open lower block valve and crack vent valve 2 Slowly open lower shutoff BLOCK SHUT OFF VALVES VENT VALVE DPU valve When bubble free VALVE liquid spills from vent close gyyt oFF DRAIN vent valve VALVE 3 Open upper block valve and HIGH PRESSURE slowly open shutoff valve 4 Crack drain valve to remove any condensation and close drain valve L Cool Non Condensing Liquid DPU Below Tank High pressure side of DPU is connected to the bottom outlet of tank The low pressure side is connected to top or gas outlet of tank The following steps are suitable for piping Figure 2 9 Cool layout for water oil or other Non Condensing Liq media that will not condense in DPU Below Tank low pressure piping 1 Close both shutoff valves open lower block valv
27. ll WARNINGS CAUTIONS AND NOTICES pages 7 and 8 before installation or startup 6 Drain drip pots of hydrates at regular intervals D Steam Flow DPU Below Run For this application condensing reservoirs and piping to orifice taps must be level Assure that the reservoir and steam lines are at the same level Two inch pipe crosses may be used as PRIMARY DEVICE seal pots PLUGS 1 Close vent valves if used open bypass and shutoff valves BLOCK 2 Remove condensing reservoir side CONDENSING i and fill plugs RESERVOIR 3 Pour water into both reservoirs SHUT OFF until piping and DPU housings VALVES are filled Piping and housing chambers shall be free of bubbles VENT VALVES The pointer will rest at zero or OPTIONAL output will be 4 mA or 10 mA as applicable when the instrument and piping are completely filled Install side and fill plugs in reservoirs Close shutoff valves and open block valves Slowly open both shutoff valves simultaneously and check for leaks Close bypass valve NOTICE Ensure that plugs are used and never valves on the DPU E Liquid Flow DPU Above Run The following steps should be used if sediments may be present Inspect piping periodically Not recom DPU mended for hot or gassy liquids 1 Close both shutoff valves and SHUT OFF open both block valves VALVES 2 Open bypass valve Crack VALVES vent valves or loosen plugs from top ports of DPU body housings Moos 3 Cr
28. lled bellows a center block range springs overrange valves and a torque tube assembly The pressure housings are connected by pipe or tubing to the primary device located in the system piping Variations in differential pressure within the pressure housings cause the bellows to expand or contract in a linear direction towards the side having the lowest pressure The linear movement of the bellows is converted into angular rotation when transmitted to the torque tube shaft by the drive arm and this mechanical motion actuates the mechanism of the process monitoring instrument The process monitoring instrument that is connected to the torque tube assem bly may be an indicator a switch a transmitter a recorder or other process control device 1 3 Specifications The Model 224 224C DPU is available in various pressure ratings to measure to specific ranges between 0 30 inches of water column and 0 1000 psi with safe working pressure SWP ratings from 500 to 10 000 psi 224 Non C lim ited to 500 to 3 000 psi SWP See Table 1 1 page 4 The 224C Bellows Unit Assembly BUA is produced in three bellows sizes 1 5 8 inch 5 8 inch and 3 4 inch diameter The 1 5 8 inch diameter BUA accommodates differential pressures to 55 psi The range springs of this BUA are contained within the bellows and do not come in contact with the measured liquid The 3 4 inch BUA accommodates differential pressures up to 400 psi and the 5 8 inch BUA up to 1
29. lows Unit Vent Housing High Pressure Housing Gasket Leaks Replace Gasket DPU Tampered With Return BUA for Repair Primary 07 Source Orifice Partially Restricted or too Small Clean Out or Replace Piping from Primary 0 Element to Leak in Low Pressure Side Piping Repair High DPU Indication Gas Trapped in Low Pressure Housing in Liquid Service or Liquid Trapped in Housing in Vent Housing Bellows Unit Gas Service Low Pressure Housing Gasket Leaks Replace Gasket Range Spring Broken or DPU Tampered With Return BUA for Repair Primary Element Install Dampening Device Upstream of DPU Run Flow Pulsating e Liquid Trapped in Gas Piping or Gas Bubble Piping from in Liquid Piping Primary Erratic Element to Vapor Generator Incorrectly Installed Repipe Indication DPU mE E 2 Reference Leg Gassy or Liquid Vaporizing See Piping Instructions Obstructed Bellows Travel Clean Bellows Remove Bellows Unit Gas Trapped in DPU High Pressure or Low Pressure Housing Remove See Startup Procedure Note See actuated instrument manual for additional troubleshooting informa tion 25 SECTION 5 DIMENSIONS 5X 10 32 LINC 2B X 11732 8 7 DP HIGH PRESSURE HDLISING A LOW PRESSURE HOUSING 586 14 9 1 172 29 8 NOMINAL SHAFT ROTATION A FRONT VIEW REMOVE U BOLTS amp USE 4 9 16 SCREWS FOR WALL MOUNTING TOP PR
30. lt WARINING on page 20 3 1 pg 21 22 for Part No 22 Plug Pipe Port 2 Pipe Plug 1 4 NPT Brass 0224 0100C Pipe Plug 1 8 NPT Brass 0224 0058C Pipe Plug 1 8 NPT SST 0224 1676C Pipe Plug 1 4 NPT Steel CP 0199 0191C Pipe Plug 1 4 NPT Monel 0199 0235C Pipe Plug 1 4 NPT SST 0199 0214C Pipe Plug 1 2 NPT Steel CP 0199 0192C Pipe Plug 1 2 NPT SST 0199 0215C Pipe Plug 1 2 NPT Monel 0199 0234C Pipe Plug 3 8 NPT SST 0605 0010L 23 Screw 1 4 28 x 5 8 Steel CP 0111 0033J 4 24 Washer Lock Ext Tooth SST 1 4 0003 0068K 4 25 Bracket Mounting Not for use with Brass Housings 0224 0055C 2 26 Nut Hex 1 4 28 Steel CP 0500 0011J 4 32 224 224C DPU Parts List See Notes and NOTICE below Cont Table 6 1 224 224C DPU Parts List Continued Item Description Part Number Qty 27 Washer Ext Tooth 1 4 SST 0003 0068K 4 28 Screw Fl Hd 1 4 28 x 1 2 Steel 0112 0018J 4 Notes 1 Typically two Pipe Plugs required size depends upon ports to be plugged 2 Stainless steel housing screws are recommended when the instrument is installed in a corrosive environment 8 Non C Versions for specific nuclear service applications only 4 When ordering please specify model number of instrument Minimum parts order is 100 00 For actuated instrument parts refer to separate instrument manual 5 Housing pressure ratings are for housings only not DP
31. ng If bypass valve is opened at any time the reference leg must be filled again If no bypass is installed disregard steps 1 2 and 3 Open the lower block valve in step 6 and shut off valve in step 7 Liquid CO The instrument may be located above or below the vessel The recom mended vapor generator is a 12 inch length of 1 to 1 1 2 inch diameter pipe Avoid traps or pockets between the vapor generator and the tank Install the inverted U shaped gas trap inside the vessel 1 Close shutoff valves BLOCK VALVE INVERTED U GAS TRAP 2 Open drain valve and DPU housing drain plugs to remove all liquid from the system and close drains 3 Open bottom block valve slowly to allow liquid to enter gas gen erator Assure that vent valve is closed BLOCK VALVE MINIMUM LENGTH 6 INCHES VAPOR GENERATOR 4 Open top block valve and shutoff valves SHUT OFF NOTICE Do notinsu VALVE late the piping below the lower block valve Do not share filling and vapor return lines with the DPU piping lines LOW PRESSURE Cryogenic Liquids Figure 2 11 Liq Instrument may be located above or below the vessel The recommended vapor generator is a spiral of 3 8 inch tubing Install the inverted U shaped gas trap inside vessel Meters for oxygen service are specially cleaned and packaged in polyethylene bags and must be kept extremely clean 1 Close shutoff valves 2 Open drain valve and DPU housi
32. ng drain plugs to remove all liquid from system and close drains continued on next page 15 2 4 DPU Piping Startup Examples Continued Review all WARNINGS CAUTIONS AND NOTICES pages 7 and 8 before installation or startup L Cryogenic Liquids Continued 3 Open bottom block MINIMUM LENGTH valve slowly to 12 INCHES allow liquid to enter gas generator Assure that vent valves are closed SHUT OFF BLOCK VALVE INVERTED U GAS TRAP VALVE 4 Open top block VAPOR GENERATOR valve and open FLAT TUBULAR SPIRAL 1 3 K shutoff valves INSULATION KEEP DEAD LEG BETWEEN TANK AND SPIRAL 5 IN OR LESS PRESSURE DPU NOTICE Do not share filling or vapor return Figure 2 12 Cryo Liq lines with DPU piping M Bubbler System Recommended when piping connections must be made at the top of the tank or whenever solids or sludge are present 1 Set bubbler input gas regulator pressure slightly higher than process vessel pressure SIGHT FLOW 2 Open block valves and shutoff valves and close INPUT GAS bypass valve REGULATOR 3 Check sight flow into bub bler tube 4 Adjust bubbler system to minimum flow by adjust ing input gas regulator BLOCK VALVES SHUT OFF VALVES BYPASS VALVE DPU HIGH PRESSURE NOTICE Do not share filling or vapor return lines with DPU piping 16 2 4 DPU Piping Startup Examples Continued Review all WARNINGS CAUTIONS AND NOTICES pages 7 and 8 before ins
33. nly the warranty made by the manufacturer of that product and Cameron assumes no responsibility for the performance or reliability of the unit as a whole In no event shall Cameron be liable for indirect incidental or consequen tial damages nor shall the liability of Cameron arising in connection with any products sold hereunder whether such liability arises from a claim based on contract warranty tort or otherwise exceed the actual amount paid by Buyer to Cameron for the products delivered hereunder The warranty does not extend to any product manufactured by Cameron which has been subjected to misuse neglect accident improper installation or to use in violation of instructions furnished by Cameron The warranty does not extend to or apply to any unit which has been repaired or altered at any place other than at Cameron s factory or service locations by persons not expressly approved by Cameron Product Brand Barton is a registered trademark of Cameron International Corporation Cameron 35 MEASUREMENT SYSTEMS Formerly NuFlo Measurement Systems Barton Instrument Systems Caldon Inc HOUSTON 281 582 9500 NORTH 1 800 654 3760 HEAD OFFICE AMERICA ms us c a m com ASIA 603 2287 1039 EUROPE 44 1243 826741 PACIFIC MIDDLE EAST ms asiapacific c a m com amp AFRICA ms uk c a m com USA UK gt SCOTLAND CHINA UAE ALGERIA MALAYSIA SINGAPORE WWW c a m com flo C CAMERON
34. ot use a sharp instrument to clean between convolutions 4 Assure that there are no broken range springs Replace the housings and O rings 6 Review Housing Bolt WARNING page 20 before proceeding See Table 3 1 below and page 22 for pressure housing bolt size material part number and torque values e Table 3 1 Bolt Torque Ratings BOLT LUBE TORQUE ROTATION LB FT Degrees BRASS STEEL 1 4 28 x 2 0220 0035J A sree rer ees Lone A286 500 SST Salt Spray amp 1 4 28 x 2 5 0220 1112J 16 18 NACE STEEL pe e amen cen D e A286 1 500 Salt Spray amp 1 4 28 x 2 5 0220 1112J YES 16 18 NACE table continued on next page Notes 1 Lubricant Lightly apply Molykote G n paste 0002 0010U on the first two threads only unless other wise specified do not lube bearing surface Special applications such as Nuclear Cryogenic and oxygen services may require special lubricants Check BOM for specifics such as thread head and gasket surfaces 2 Torque on bolts is accomplished in 3 or 4 steps Tighten uniformly 3 Cameron recommends using a torque wrench whenever installing housing bolts Rotation of bolt head is measured after bolt is snug approx 1 16 turn past head contact with approximately 2 LB FT torque Do not exceed this rotation To tighten bolts without torque wrench use rotation values 4 Lube threads per
35. pressure should not exceed five pounds per square inch and insulation should not be used If pressure must exceed five pounds per square inch limit the length of tubing around the DPU to two turns and do not insulate When severe pulsation is present install a suitable pulsation dampening device upstream of the DPU otherwise accuracy will be affected Mount DPU on a solid support to minimize vibration Tighten all points using a suitable compound leaks in piping can cause measurement errors Rotate the housing as necessary to place the connection in the proper posi tion The DPU has connections in the pressure housings to accommodate various pipe sizes refer to Section 5 Install a valve manifold connecting the DPU and the source of differential pressure to facilitate operation and checking of the DPU Install all shutoff and bypass valves so they are easily accessible from front of instrument Locate block valves at the source of differential pressure For gas service it is recommended that zero check be performed with both block valves closed If gas flow is pulsating a standing wave effect may be in the process line displacing the indicator appearing to be a zero error 2 4 DPU Piping Startup Examples Typical piping diagrams and startup procedures are presented on pages 9 17 For specific application installation piping information contact Cameron Review all WARNINGS CAUTIONS AND NOTICES pages 7 and 8 before installation or
36. rm over torque tube shaft clear end of torque tube housing by approximately 0 030 inches before securing to prevent interference 2 tighten drive arm assembly onto torque tube shaft a Support block shaft and tighten clamp screw until snug to shaft b Still supporting block shaft tighten clamp screw an additional e Sintered 1 3 to 1 2 turn This screw can normally turn one full revolution before breaking e Slotted 1 4 to 1 3 turn The slot in the slotted clamp block should still be open 3 8 Drive Arm Tightness Test Procedure Required for Nuclear Seismic High Impact Shock Qualified Units This procedure tests drive arm to torque tube attachment tightness by apply ing torque developed by DPU onto a fixed drive arm Care should be taken to apply pressure slowly as the torque is being applied to the connection through the torque tube drive shaft and not the torque tube itself With pointer at normal 0 torque tube rotation position max minimum scale position or 0 on a normal 0 to 100 scale unit adjust drive arm stop bracket or use alternate means to prevent pointer from moving stop bracket interferes with drive arm movement Note On reverse acting and split range units the DPU must be pressurized to move pointer to max minimum scale position and on suppressed units it will be necessary to apply pressure to establish a reference point to check for zero shift Pressurize DPU as required to full calibrated sc
37. rque tube and drive arm at the inner end rotates through the same angle as the drive arm The rotation of the torque tube shaft provides the mechanical motion required to actuate process instruments such as recorders indicators transmitters controllers and switches If the bellows are subjected to a pressure greater than the range of the DPU they move their normal travel range and a small amount of overtravel until the overrange valve seals against the valve seat As the valve closes the fill liquid is trapped in the bellows Since the fill fluid is essentially noncompressible the bel lows are fully supported and will not be damaged regardless of the overpressure up to the full rated pressure of the instrument applied to them Also since dual overrange valves are used full protection against overrange is provided in either direction An additional convolution in the high pressure side of the bellows provides for expansion or contraction of the fill fluid relative to ambient temperature changes This extra convolution acts as an accumulator permitting the fill fluid to change volume without materially affecting the pressure within the bellows or changing the physical relationship of the two bellows Blank Page SECTION 2 INSTALLATION 2 1 General The instrument should be inspected at time of unpacking to detect any damage that may have occurred during shipment Note The DPU was checked for accuracy at the factory do not ch
38. s If output travels downscale check for high pressure piping leaks 4 Repair piping if necessary and repeat steps 1 through 3 until output remains stationary at zero 5 Close both shutoff valves and open bypass valve s 6 Open both block valves and slowly open both shutoff valves 7 Close bypass valves and if two bypass valves are used open vent valve 8 If drip pots are used open drip valves and blow out accumulated liquid Gas Flow Hydrates Present The following is used if hydrates or heavy solids are present piping and shutoff not less than 1 2 inch in diameter Bypass the manifold above to isolate the meter from con necting piping Drip pots VENT ved i ad BYPASS VALVE prevent plugging VALVES 1 Open bypass valve s press DPU close vent valve CONNECTION USE ONLY ONE 2 Open both shutoff valves 5 SHUT OFF VALVES DRIP POTS and one block valve to pressurize the DPU then close block valve BLOCK 3 Close one bypass valve VALVES and check system for leaks If output trav PRIMARY DEVICE els upscale check for Figure 2 3 Gas Flow low pressure piping leaks If output travels Hydrates Present downscale check for high pressure piping leaks 4 Repair piping if necessary and repeat steps 1 through 3 until output remains stationary at zero 5 Close bypass valves If two bypass valves are used open vent valve 2 4 DPU Piping Startup Examples Continued Review a
39. surize DPU then close _ STATIC PRESS CONNECTION block valve USE ONLY ONE BYPASS VALVES SHUT OFF VALVES DPU 3 Close one bypass valve and check system for leaks If output travels upscale check for low pressure piping leaks If output travels downscale check for high pressure piping leaks VENT VALVE BLOCK VALVES PRIMARY DEVICE Figure 2 1 Gas How 4 Repair piping if necessary and repeat steps DPU Above Run 1 through 3 until output remains stationary at zero Close both shutoff valves and open bypass valve s Open both block valves and slowly open both shutoff valves Close bypass valves and if two bypass valves are used open vent valve ON AG Close bypass valves and if two bypass valves are used open vent valve 2 4 DPU Piping Startup Examples Continued Review all WARNINGS CAUTIONS AND NOTICES pages 7 and 8 before installation or startup B 10 Gas Flow DPU Below Run Used only when necessary to mount the DPU below run Drip pots are required when wet gas is present 1 Open bypass valve s and VENT close vent valve 2 Open both shutoff valves PRIMARY DEVICE SHUT OFF and one block valve to VALVES pressurize DPU then close block valve VALVES 3 Close one bypass valve STATIC PRESS and check system for CONNECTION DPU leaks If output travels USE ONLY ONE Fiqure 2 2 Gas Flow upscale check for low DRIP 3 i NE POTS DPU Below Run pressure piping leak
40. t and no leaks are detected the housing and or piping are not completely filled with liquid Repeat steps 1 through 4 until output remains stationary at the lowest value 6 Slowly open both block valves and close bypass valve 7 For service with hot or gassy liquids fill both sides of the manifold through the fill tee with the liquid to be measured cooled to 200 F 93 3 C or less expel gas bubbles from DPU and piping 8 Open vent valve in the bypass valve Tighten the fill plug when bubble free liquid flows BYPASS G Corrosive Liquid Flow 1 Close shutoff valves and open POTE wees block valves 2 Open bypass valve and close DPU drain plugs PRIMARY 3 Remove fill and side plugs DEVICE from seal pots BLOCK VALVES 4 Fill seal pots piping and DPU housing with immiscible seal fluid by pouring into upper fill ports DPU housing tubing and scale pots must be filled to seal pot side ports with bubble free liquid The pointer will indicate zero or 4 mA or 10 mA as applicable when high and low pressure chambers are filled with liquid Figure 2 7 Corrosive Liquid Flow 5 Install side plugs continued on next page 12 2 4 DPU Piping Startup Examples Continued Review all WARNINGS CAUTIONS AND NOTICES pages 7 and 8 before installation or startup G Corrosive Liquid Flow Continued 6 Slowlv open each shutoff valve alternatelv until bubble free line liquid spills from both upper fill plu
41. tallation or startup N Liquid Specific Gravity This method is for determining specific gravity changes in a process media using a differential pressure instrument 11 2 Set bubbler input gas regulator pressure slightly higher than process vessel pressure SIGHT FLOW GAGES WITH THROTTLING VALVES BLOCK VALVES Open block valves and shutoff valves and close bypass valve Check sight flow into bub bler tube Adjust bubbler system to minimum flow by adjusting digit flow gages throttling valves INPUT GAS SHUT OFF VALVES BYPASS BALVE DPU HIGH PRESSURE Figure 2 14 Liq Specifc Gravity 17 18 Blank Page SECTION 3 MAINTENANCE 3 1 Required Tools Tool Purpose Screwdriver Bracket Screws 50 Ib Torque wrench Pressure housing bolts 3 2 Test Calibration Equipment P at INSTRUMENT TO BE CALIBRATED INSTRUMENT TO BE CALIBRATED ACCURATE INDICATOR WITH THE DESIRED RANGE VENT THE LOW PRESSURE HOUSING OF BOTH INSTRUMENTS TO ATMOSPHERE Typical Calibration Setup Portable Calibration REGULATOR BLOCK VALVE MANOMETER OR OTHER PRESSURE REFERENCE VENT VALVE FLEXIBLE HOSE CONNECT THE HIGH PRESSURE HOUSINGS IN PARALLEL SQUEEZE BULB TO GET SIMULATED DIFFERENTIAL PRESSURES Figure 3 1 Test Calibration Setup 3 3 Preventative Maintenance e Piping Periodically inspect the integrity of the DPU piping Tighten all pipe joints as nec
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