Emerson EZH and EZHSO Series Pressure Reducing Regulators Instruction Manual
Contents
1. BODY SIZE BODY STYLE NPS DN SODY MATERIAL Se nce S TEBE Inlet Tapped Inlet and Tapped Outlet NPT GE11518X012 ff 4 Cast iron CL125 FF GE11528X012 14B5623X012 CL250 RF GE11580X012 14B5623X022 NPT GE11581X012 SWE 11440 012 0007777 1 25 CL150 RF GE11583X012 14B5623X032 CL300 RF GE11607X012 14B5623X042 WCC Steel CL600 RF GE11608X012 14B5623X052 SCH 40 BWE GE11610X012 SCH 80 BWE GE11611X012 PN 16 40 RF GE13625X012 NPT GE10583X012 Cast iron CL125 FF GE105855X012 0007777 CL250 RF GE10587X012 NPT GE10588X012 SWE GE10682X012 2 50 CL150 RF GE10676X012 14B5834X032 CL300 RF GE10678X012 14B5834X042 WCC Steel CL600 RF GE10679X012 14B5834X052 SCH 40 BWE GE10680X012 SCH 80 BWE GE10681X012 PN 16 40 GE12898X0120 CL125 FF GE10689X012 Cast iron CL250 RF GE10698X012 CL150 RF GE10699X012 14B5835X032 CL300 RF GE10700X012 14B5835X042 M CL600 RF GE10701X012 14B5835X052 WCC Steel SCH 40 BWE GE10702X012 SCH 80 BWE GE10703X012 PN 25 40 6 13594 0127 CL125 FF GE10707X012 Cast iron CL250 RF GE10822X012 CL150 RF GE10835X012 14B5836X032 40 100 CL300 RF GE10839X012 14B5836X042 WCC Steel CL600 RF GE10842X012 14B5836X052 SCH 40 BWE GE10843X012 SCH 80 BWE GE1084X0012 1 Not available for Standard body 2 Not available for Tapped Inlet Pilot Supply body2. 11 44 MLM1945 APPLY LUBRICANT L SEALANT S VERSION WITHOUT TRAVEL INDICATOR DETAIL L1 LITHIUM HYDROXYSTEGRATE NLGI 2 GRADE GREASE L2 SILICONE BASED GREASE 51 ANAEROBIC METHACRYLATE SEALANT FOR NUTS AND BOLTS 2 ANAEROBIC METHACRYLATE SEALANT FOR THREADS 34 33 51 13 14 10 83 35 70 73 72 69 52 L2 52 12 77 74 75 15 16 174 L2 18 19 XT 4 21 E 10 22 23 8 H L2 9 H L2 8 Y L2 8 H L2 O L2 8 H L2 27 51 78 32 31 30 29 12 NPS 4 DN 100 1 Lubricant and sealant must be selected such that they meet the temperature requirements 10 Figure 4 Type EZH Main Valve Assembly continued Type EZH Relief Backpressure Regulator MLM1945 B NPS 4 DN 100 Figure 4 Type EZH Main Valve Assembly continued Unscrew 8 special screws key 68 Unscrew eye bolts key 35 from the cap and unscrew 8 screws key 77 to remove cap key 70 from the upper actuator casing key 5 Attach eye bolts to the upper sp
3. Table 4 EZH Travel Indicator Assemblies Part Numbers DESCRIPTION Types EZH and EZHSO MATERIAL Nitrile NBR NPS 1 DN 25 ERSA01539A0 NPS 2 DN 50 ERSA01546A0 NPS 3 DN 80 ERSA01547A0 NPS 4 7 DN 100 ERSA01549A0 1 The assemblies include keys 138 139 140 141 142B 143 144 145 160 and 192 15 EZH Relief or Backpressure Regulator Type EZH Main Valve continued Key Description 7 g 10 11 13 14 15 16 17 18 19 20 21 O ring NPS 1 2 and 3 DN 25 50 and 80 NPS 4 DN 100 Anti Friction Rings 4 required O ring 2 required Pipe Plug Actuator Upper Casing NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body NPS 4 DN 100 Body Spring NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body NPS 4 DN 100 Body Sleeve NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body NPS 4 DN 100 Body O ring Socket Head Cap Screw NPS 1 DN 25 Body 6 required NPS 2 7 DN 50 Body 6 required NPS 3 DN 80 Body 12 required NPS 4 DN 100 Body 8 required O ring Inlet Plate NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body NPS 4 DN 100 Body Outlet Plate NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body NPS 4 DN 100 Body Diaphragm NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body NPS 4 DN 100 Body Cap Screw NPS 1 DN 25 Body 14 required for Type EZH NPS 2 DN 50 Body 14 requir
4. A new and improved travel indicator has been phased in during 2013 The new version improves the O ring stem seal to minimize leakage and extend service life The components of the legacy and new versions are not interchangeable If maintenance is performed on the new travel indicator it is recommended to replace the entire travel indicator assembly with the new version Part numbers for the assemblies are shown in the parts list Figure 5 shows the difference between the designs The spare parts kits will support either design Take care to use the correct O ring key 142A or 142B when performing maintenance see parts list for the appropriate part number Type EZH Relief Backpressure Regulator 1 Remove plastic travel indicator cover key 138 Loosen travel indicator bushing key 140 and remove it by sliding it over the travel indicator stem key 139 Remove indicator fitting key 141 and inspect O ring key 143 Remove O ring key 142B and back up rings key 160 Replace and lubricate O ring if damaged Pull up on the travel indicator stem key 139 to force the spring collet key 144 out of the diaphragm head groove Examine these parts and the stem for wear and replace if necessary Examine the retaining ring key 145 for wear and replace if necessary Insert the travel indicator stem key 139 and spring collet key 144 back into the diaphragm head groove Replace the indicator fitting key 141 and O ring k
5. FKM Fluorocarbon FKM NPS 4 DN 100 Nitrile NBR and Fluorocarbon FKM Fluorocarbon FKM Body Seat Ring NPS 1 DN 25 Body For 10096 Capacity For 8096 Capacity For 5096 Capacity For 3096 Capacity NPS 2 DN 50 Body For 10096 Capacity For 8096 Capacity For 5096 Capacity For 3096 Capacity NPS 3 DN 80 Body For 10096 Capacity For 8096 Capacity For 5096 Capacity For 3096 Capacity NPS 4 DN 100 Body For 10096 Capacity For 8096 Capacity For 5096 Capacity For 3096 Capacity Cage NPS 1 DN 25 NPS 2 DN 50 NPS 3 DN 80 Anti Friction Ring 2 required NPS 1 2 and 3 DN 25 50 and 80 Only Actuator Lower Casing NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body NPS 4 DN 100 Body Cap Screws NPS 1 DN 25 Body 4 required NPS 2 DN 50 Body 8 required NPS 3 DN 80 Body 8 required NPS 4 DN 100 Body 8 required Part Number REZH1X00N22 REZH1X00F22 REZH2X00N22 REZH2X00F22 REZH3X00N22 REZH3X00F22 REZH4X00N22 REZH4X00F22 See Following Table GD29726X012 M0300940X12 M0300910X12 M0300710X12 GD29581X012 M0300950X12 M0300920X12 M0300720X12 GD29732X012 M0300960X12 M0300930X12 M0300730X12 M0303250X12 M0303430X12 M0303420X12 M0303410X12 GE31405X012 GE37679X012 GE38018X012 GD27409X012 GD29697X012 GD29583X012 GE44397X012 M0300770X12 GD89878X012 GE11386X012 GE11387X012 M4691020X12 Type EZH Relief Backpressure Regulator Key 1 Type EZH Main Valve Body Part Numbers
6. Insert the spring lock washers key 32 and hex socket cap screws key 33 and tighten See Torque Specifications Table 3 for proper torque values 10 Lightly lubricate the O rings keys 15 and 17 and the inner and outer diaphragm key 20 edges Place the inlet plate key 18 and the diaphragm key 20 on the sleeve key 14 Make sure O rings keys 15 and 17 are correctly positioned Insert and tighten the hex socket cap screws key 16 See Torque Specifications Table 3 for proper torque values Note When tightening cap screws key 21 arranged in a circular pattern alternate the tightening of each fastener with the fastener directly across from it using a star crisscross pattern for five times until proper specified torque is achieved Each time around when all screws are tightened to the required torque the diaphragm will compress a little until the plates are in direct metal to metal contact It will take at least five times around before this happens Only then will the applied torque on each screw remain at the required value 11 Carefully lift the lower actuator casing assembly key 5 and place on the body key 1 Make sure to match up the alignment marks Secure with stud bolts and nuts keys 24 and 26 See Torque Specifications Table 3 for proper torque values 12 Lightly lubricate the spring key 13 and place on the inlet plate key 18 13 Carefully place the upper actuator casing key 1
7. TORQUE SPECIFICATIONS Body Size PART NAME NPS 1 DN 25 NPS 2 DN 50 NPS 3 DN 80 NPS 4 DN 100 foot pound foot pound foot pound foot pound Indicator Fitting or Plug key 141 10 to 30 14 to 41 10 to 30 14 to 41 10 to 30 14 to 41 10 to 30 14 to 41 Stud Nuts key 26 45 to 50 61 to 68 45 to 50 61 to 68 80 to 95 108 to 129 Socket Head Screws key 16 50 to 70 5 6 to 7 9 50 to 70 6to 7 9 50 to 70 6 2 to 7 9 100 to 115 11 to 13 Stud Bolts key 24 50 to 70 68 to 95 50 to 70 68 to 75 100 to 120 136 to 163 Cap Screws key 21 50 to 55 68 to 75 130 to 150 176 to 203 250 to 270 339 to 366 280 to 310 380 to 420 Cap Screws key 6 50 to 60 68 to 81 50 to 60 68 to 81 70 to 95 95 to 129 140 to 155 190 to 210 Socket Head Cap Screws key 33 30 to 400 3 4 to 4 5 50 to 60 5 6 to 6 8 80 to 100 9 to 11 80 to 100 9 to 11 Smart Screws key 68 31 to 400 3 5 to 4 5 Socket Head Cap Screws key 74 26 to 350 2 9to4 Cap Screws key 77 90 to 110 122 to 149 Sleeve Guide key 61 130 to 140 176 to 190 Cap Screw key 154 16 1 8 500 5 6 10 14 2 9 to 3 5 3 9 to 4 7 Stem Nut key 151 32 43 32 43 45 61 45 to 50 61 to 68 Stem Nut key 155 30 41 Hex Nut key 152 40 54 60 81 45 to 50 61 to 68 1 Torque specifications are given in inch pounds Main Valve and Actuator Maintenance NPS 1 through 3 DN 25 through 80 Disk Maintenance Refer to Figure 4 For Type
8. and place in the body key 16 Install the orifice Set the disk holder key 22 in the body key 16 Lightly lubricate the rims of the diaphragm plate key 14 Position the diaphragm convolution facing down make sure that the diaphragm is not deformed and is properly installed Take the diaphragm key 14 and place it in the body key 16 on top of the disk holder key 22 Set the upper diaphragm plate key 13 on top of the diaphragm key 14 10 Place washer key 11 and stem nut key 26 on the 11 stem key 23 and tighten using a wrench to hold the stem Place the upper spring seat key 9 on the upper diaphragm nut key 26 and mount the spring case key 8 on top of the body key 24 and the diaphragm key 14 13 EZH Relief or Backpressure Regulator 12 Place washers key 11 and uniformly tighten the machine screws key 10 to hold the body key 24 and spring case key 8 together 13 Install spring key 7 and upper spring seat key 6 on top of the lower spring seat key 9 inside the spring case key 8 Install Cap key 3 14 Screw in adjusting screw key 1 at desired spring compression and use the lock nut key 2 to lock the adjusting screws position Parts Ordering Each Type EZH relief valve or backpressure regulator is assigned a serial number which can be found on the nameplate Refer to the serial number when contacting your local Sales Office for technical information or w
9. assembly key 12 Figure 7 remains in the pilot body key 1 Figure 7 then it must be pointed down if possible or otherwise protected If the exhaust is to be piped to the main valve exhaust or remotely vented remove the vent assembly and install tubing or piping into the 1 4 NPT pilot exhaust connection Protect the open end of the exhaust pipe by installing a Screened vent cap Type EZH Relief Backpressure Regulator 6 The Type PRX 182 pilot spring case vent key 12 Figure 7 must be kept open to atmospheric pressure Protect the vent assembly from icing moisture or debris that may cause blockage as required To change the vent orientation twist the vent assembly in the spring case To remotely vent the pilot spring case remove the vent assembly and install tubing or piping into the 1 4 NPT spring case vent tapping Protect the open end of the vent line by installing a screened vent cap 7 The Type PRX pilot connections are 1 4 NPT Connect the inlet control sense line from the A port Figure 6 key 47 on the bottom of the PRX Series pilot to a straight run of pipe 6 to 10 pipe diameters from the relief valve or backpressure regulator inlet as shown in Figure 3 using 3 8 inch 9 5 mm or larger outside diameter tubing If such a distance is not practical connect the control line away from elbows swages nipples or any area where abnormal flow velocities occur Startup and Shutdown If pressure is introduced first
10. gas or other process fluid Before starting to disassemble carefully release all pressures according to the appropriate shutdown procedure Use a gauge to monitor relief inlet pressure while releasing it Use proper lifting techniques when lifting the upper and lower actuator casings keys 11 and 5 off the Type EZH body key 1 The actuator assembly weighs more than 100 pounds 45 kg Customer cannot use another type of eyebolt in the regulator Only Regulator Technologies parts can be used to repair the unit Eye bolts are installed to aid in the handling and installation of the Regulator Assembly only Do not attempt to lift more weight than the regulator with these eye bolts Maintenance Relief valve or backpressure regulator parts are subject to normal wear and must be inspected periodically and replaced as necessary Due to the care Fisher takes in meeting all manufacturing requirements heat treating dimensional tolerances etc use only replacement parts manufactured or furnished by Fisher Also when lubrication is required use a good quality lubricant and sparingly coat the recommended parts The frequency of inspection and replacement depends upon the severity of service conditions and upon applicable codes government regulations and company standards EZH Relief or Backpressure Regulator Table 3 Torque Specifications
11. maintenance of any product Responsibility for proper selection use and maintenance of any Emerson Process Management Regulator Technologies Inc product remains solely with the purchaser 5 Emerson Process Management Regulator Technologies Inc 2012 2013 All Rights Reserved cess V
12. mount O rings key 9 and anti friction rings key 8 inside the cap Unscrew the eye bolts key 35 from the upper spring seat key 73 and carefully place the cap on the upper actuator casing key 11 Align the travel indicator hole on the cap to the upper actuator casing travel indicator hole Lubricate cap screws key 77 and attach cap key 70 to the upper casing key 5 using cap screws key 77 Bag diaphragm flat to lower actuator casing diaphragm flange contact area Carefully place the upper actuator casing on the top of the lower actuator casing trim system using a stud to guide Note Rotate the upper casing such that the outer holes for sensing lines are perpendicular to gas flow and outer holes of lower casing 18 Lubricate threads on bolts key 21 19 Bolt together the upper and lower actuator casings keys 11 and 5 using cap screws key 21 washers key 22 and hex nuts key 23 See Torque Specifications Table 3 for proper torque values 12 Tighten cap screws using a star criss cross pattern for five times until proper specified torque is achieved 20 Mount O ring key 75 on the cap key 70 21 Screw the eye bolts key 35 on the cap key 70 22 If present set the stem key 139 through the casing hole and tap it into the groove in the diaphragm plate key 18 Slide the travel indicator fitting key 141 over the stem and tighten to the cap key 70 Type EZH Travel Indicator Maintenance
13. to the main valve before the pilot the main valve may go wide open and subject the downstream system to full inlet pressure Note The maximum inlet pressure for specific constructions are given in Table 6 Use a pressure gauge to monitor inlet pressure during startup Relief Installation Figure 6 Startup 1 Close vent valve not shown 2 Slowly open block valve and hand valve if installed 3 Adjust the pilot as needed Shutdown 1 Close block valve and hand valve if installed 2 Slowly open vent valve not shown Backpressure Installation Startup 1 Close upstream and downstream vent valves not shown 2 Slowly open upstream block valve first and then slowly open downstream block valve 3 Adjust the pilot as needed If the pilot is not piped downstream make sure the pilot exhaust is pointed in the correct direction Shutdown 1 Close upstream block valve first and then close the downstream block valve 2 Open downstream and upstream vent valves not shown Type PRX 182 Pilot Adjustment For PRX Series pilots Figure 7 loosen locknut key 2 and turn the adjusting screw into the spring case to increase or out of the spring case to decrease the downstream pressure When the required downstream pressure is maintained for several minutes tighten the locknut to lock the adjusting screw in position Avoid personal injury or damage to property from sudden release of pressure or uncontrolled
14. upper actuator casing key 11 and unscrew the eye bolts key 35 from the cap key 70 Remove O ring key 75 Inspect the O ring for damage or wear and replace if necessary Remove the O ring key 69 Inspect the O ring for damage or wear and replace if necessary Lubricate O ring before placing inside the cap key 70 Remove special screws key 68 from sleeve key 14 Fit eye bolt key 35 into the upper spring seat key 73 threaded hole Carefully remove the trim system from the sleeve guide key 61 using the eye bolts key 35 Remove socket head cap screws key 33 and lock washers key 32 Lift off the disk retainer key 31 and disk holder assembly key 30 10 Remove the O ring key 29 Inspect the O ring for 11 damage or wear replace if necessary Lightly lubricate O ring before placing the sleeve adaptor key 27 Place disk holder assembly key 30 onto disk retainer key 31 Type EZH Relief Backpressure Regulator 44 L2 62 L2 8 9 25 8 1217 L2H 4 22 TOP VIEW L2 L2 L1 4 8 10 9 8 15 16 17 18 19 20 L2 12 L2 L2 L1 10 26 51 L2 L2 38 L2H 143 33 81 34 12 3
15. 0 Only NPS 1 DN 25 Body 4 required NPS 2 DN 50 Body 6 required NPS 3 DN 80 Body 4 required Sleeve Adaptor NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body NPS 4 DN 100 Body O ring NPS 1 2 and 3 DN 25 50 and 80 Only O ring Disk Holder Assembly NPS 1 DN 25 Body Nitrile NBR Fluorocarbon FKM NPS 2 DN 50 Body Nitrile NBR Fluorocarbon FKM NPS 3 DN 80 Body Nitrile NBR Fluorocarbon FKM NPS 4 DN 100 Body Nitrile NBR Fluorocarbon FKM Disk Retainer NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body NPS 4 DN 100 Body Lock Washer NPS 1 DN 25 Body 1 required NPS 2 DN 50 Body 2 required NPS 3 DN 80 Body 3 required NPS 4 DN 100 Body 4 required Part Number 1A518925072 1A3517K0012 1A519828992 5001015 12 1A341224122 1A343324122 ERCA01576A0 4692005 12 GD89876X012 GE00808X01 GD89871X012 N GD29724X012 GD29580X01 GE44403X012 N 1A341224122 1A341224122 GD89867X012 GD27425X012 GD27257X012 GD27634X012 M0300090X12 GD89892X012 GD89891X012 GD28090X012 GD28213X012 GD28091X012 GD28214X012 GD28092X012 GD28215X012 M0299090X12 M0300120X12 GD27416X012 GD27275X012 GD27625X012 M0300100X12 GD89875X012 19B0819X012 GD89870X012 M5001004X12 Type EZH Relief or Backpressure Regulator zu dl KL cm Figure 6 Type EZH Mounting Assembly EZH Relief or Backpressure Regulator Type EZH Main Val
16. 1 on the lower actuator casing key 5 Make sure to match up the alignment marks Insert the two long bolts key 39 180 apart and away from flanges Place the washers key 22 hex nuts key 23 and brackets key 35 on the long bolts and evenly tighten Using proper bolting techniques install remaining short bolts key 21 washers and hex nuts See Torque Specifications Table 3 for proper torque values 14 Place travel indicator assembly keys 138 139 140 141 142B 143 144 145 160 and 192 in the upper actuator casing key 11 if present and tighten the travel indicator fitting key 141 NPS 4 DN 100 Actuator Assembly Maintenance Refer to Figure 4 1 If present remove the travel indicator assembly by unscrewing the travel indicator fitting key 141 then pull out the stem key 139 2 Remove hex head cap screws key 21 washers key 22 and hex nuts key 23 Carefully lift the upper actuator casing key 11 off the lower actuator casing key 5 Inspect the upper actuator casing key 11 O rings key 9 and anti friction rings key 8 for damage or wear If damaged remove and replace with new parts Place the anti friction rings in the body first then slide the O ring between the anti friction rings ____ TRAVEL INDICATOR DETAIL SY N t S 2224 55555 2 WL WS PASS 5572 N e EE SS SS SISTI i
17. 2 33 81 IMPROVED TRAVEL INDICATOR DETAIL GD89918 H APPLY LUBRICANT L SEALANT S VERSION WITHOUT TRAVEL INDICATOR DETAIL FOR NPS 1 DN 25 EZH SERIES VERSION ONLY NPS 1 THROUGH 3 DN 25 THROUGH 80 L1 LITHIUM HYDROXYSTEGRATE NLGI 2 GRADE GREASE L2 SILICONE BASED GREASE 51 ANAEROBIC METHACRYLATE SEALANT FOR NUTS AND BOLTS 52 ANAEROBIC METHACRYLATE SEALANT FOR THREADS 1 Lubricant and sealant must be selected such that they meet the temperature requirements Figure 4 Type EZH Main Valve Assembly FOR NPS 3 DN 80 EZH SERIES VERSION ONLY EZH Relief or Backpressure Regulator 12 13 14 15 16 17 18 19 20 GD89918 J NPS 1 THROUGH 3 DN 25 THROUGH 80 Figure 4 Type EZH Main Valve Assembly continued Place disk retainer key 31 with the disk holder assembly key 30 into sleeve adaptor key 27 and align Screw holes Place lock washer key 32 onto the screws key 33 Screw together the disk retainer assembly into the sleeve adaptor key 27 See Torque Specifications Table 3 for proper torque values Lubricate the sleeve key 14 Carefully insert the trim system into the sleeve guide key 61 utilizing eye bolt key 35 Align sleeve utilizing the socket hex cap screw key 74 as a guide Screw special screws key 68 to affix the sleeve System See Torque Specifications Table 3 for p
18. 26X0022 6020005 12 019218 012 4500325 12 15A6011E182 M0201990X12 Type EZH Relief Backpressure Regulator NO ANN LX E pos y xo xY rs x 2 gt p 20 44 44 Ns i o TYPE PRX 182 PILOT ASSEMBLY SECTION Figure 7 Type PRX 182 Pilot Assemblies PRX Series Mounting Parts PRX Series Pilot Parts List Key Description 45 46 47 48 49 51 52 Bleed Orifice Pipe Nipple Pipe Nipple Tube Elbow Steel Fitting Stainless steel Fitting Male Tube Connector Steel Fitting Stainless steel Fitting Pipe Cross Tubing Recommended Spare Part Part Number GE01698X012 GE13860X012 1C488226232 15A6002XW32 15A6002X612 15A6002XW22 15 6002 602 113719 0012 0500213809W Key Description WN 5 Parts Kits includes keys 4 5 14 17 18 25 and 28 Type PRX 182 Nitrile NBR Fluorocarbon FKM Adjusting Screw Locknut Cap Spring Case O ring Nitrile NBR Fluorocarbon FKM O ring Nitrile NBR Fluorocarbon FKM Part Number 00 0 12 RPRXOOXOF 12 GD25334X012 GD03600X012 GD25335X012 GD01017X012 GD01017X022 GD01000X012 GD01000X022 19 EZH Relief or Backpressure Regulator PRX Series Pilot Parts List continued Key Description Upper Spring Seat Spring Spring Case 9 Spring Carrier Plate 10 Machine Screw 11 Washer 12 Filter 13 Diaphragm Plate 14 Diaphragm Nitrile NBR Fluoro
19. 9T0072 T13659T0102 M0300360X12 M6020082X12 M6020172X12 M6020139X12 1 When retrofitting a Type EZH with pins with the new cage it s also necessary to order the Seat Ring 3 Included also in sleeve subassembly 18 Key Description 66 Socket Head Set Screw NPS 4 DN 100 Body Only 8 required 67 Crush Washer NPS 4 DN 100 Body Only 8 required 68 Special Screw NPS 4 DN 100 Body Only 8 required 69 O ring 70 NPS 4 DN 100 71 O ring 72 Locking Nut NPS 4 DN 100 Body Only 73 Upper Spring Seat NPS 4 DN 100 Body Only 74 Socket Cap Screw NPS 4 DN 100 Body Only 75 O ring 77 5 NPS 4 DN 100 Body Only 8 required 78 Cage NPS 4 DN 100 Body Only Standard 82 Lower Spring Seat NPS 4 DN 100 Body Only 83 Bearing 2 required NPS 4 DN 100 Body Only 138 Indicator Cover 139 Travel Indicator Stem 140 Indicator Bushing 141 Travel Indicator Fitting 142A O ring Nitrile NBR Fluorocarbon FKM 142B O ring Nitrile NBR Fluorocarbon FKM 143 O ring 144 Spring Collet 145 Retaining Ring 159 Check Valve 192 Travel Indicator Scale Part Number M5021047X12 4501738 12 0300040 12 6020149 12 0299980 12 6020175 12 0300060 12 0300070 12 5011135 12 6020117 12 5009048 12 0303260 12 0300080 12 4500574 12 0194580 12 ERSA01803A0 ERSA02798A0 ERSA02569A0 M6010001X12 M6020066X12 1H2926X0032 1H29
20. EZH 1 2 Remove nuts key 26 Carefully lift the upper actuator casing and lower actuator casing assembly keys 11 and 5 off the body key 1 Remove the hex socket cap screws key 33 and lock washers key 32 Lift off the disk holder assembly key 30 and disk retainer key 31 Remove the O ring key 29 Inspect the O ring for damage or wear and replace if necessary Lightly lubricate O ring before placing in the sleeve adaptor key 27 Remove the cage key 3 seat ring key 2 and O ring key 34 Inspect the O ring for damage or wear and replace if necessary Lightly lubricate O ring before placing in the body key 1 Set the seat ring key 2 back in the body key 1 with the curved side down and the seat edge up Place the cage key 3 on top of seat ring The cage will engage the step on the seat ring Place the disk holder assembly key 30 and disk retainer key 31 on the sleeve adaptor key 27 Insert the lock washers key 32 and hex socket cap screws key 33 and tighten See Torque Specifications Table 3 for proper torque values Carefully lift the upper actuator casing and lower actuator casing assembly keys 11 and 5 and place on the body key 1 Secure with stud bolts and nuts keys 24 and 26 See Torque Specifications Table 3 for proper torque values NPS 4 DN 100 Disk Maintenance Refer to Figure 4 1 2 Remove cap screws key 77 Carefully lift the cap key 70 off the
21. Instruction Manual September 2013 Type EZH Type EZH Relief or Backpressure Regulator Figure 1 Type EZH Regulator Failure to follow these instructions or to properly install and maintain this equipment could result in an explosion and or fire causing property damage and personal injury or death Fisher relief valve or backpressure regulator must be installed operated and maintained in accordance with federal state and local codes rules and regulations and Emerson Process Management Regulator Technologies Inc Regulator Technologies instructions If the relief valve or backpressure regulator vents gas or a leak develops in the system service to the unit may be required Failure to correct trouble could result in a hazardous condition Call a gas service person to service the unit Only a qualified person must install or service the relief valve or backpressure regulator www fisherregulators com TYPE PRX 182 Figure 2 PRX Series Pilot Introduction Scope of the Manual This manual provides installation startup and maintenance instructions and parts ordering information for theType EZH relief valve or backpressure regulator and PRX Series pilots Information on other equipment used with this product is found in separate manuals Product Description Type EZH relief valve or backpressure regulator is pilot operated and designed for use in high pressure natural gas transmission city gate stati
22. UM DIFFERENTIAL TYPE BODY SIZE For 90 Capacity For 100 Capacity NPS DN psid bar d psid bar d 1 25 15 2 1 1 15 7 1 1 2 50 12 0 0 83 13 8 0 95 EZH 3 80 10 6 0 73 12 8 0 88 4 100 15 8 1 1 16 4 1 1 1 The pressure temperature limits in this Instructional Manual and any applicable standard or code limitation should not be exceeded 2 Type PRX Fluorocarbon FKM elastomer is limited to 0 F 18 C ii SPRING CASE VENT PORT B EXHAUST PORTA I gt M1055 INLET PRESSURE P N EE OUTLET PRESSURE LLL ATMOSPHERIC PRESSURE LOADING PRESSURE Figure 3 Type EZH with Type PRX 182 Pilot Type EZH Relief Backpressure Regulator Table 1 Main Valve Body Sizes End Connection Styles and Body Ratings MAIN VALVE BODY SIZE STRUCTURAL DESIGN RATING MAIN VALVE BODY MATERIAL END CONNECTION STYLE NPS DN psig bar or SWE 1500 103 4 25 CL150 RF 290 20 0 CL300 RF 750 51 7 CL600 RF or BWE 1500 103 or SWE 1500 103 CL150 RF 290 20 0 2 50 wee cine CL300 RF 750 51 7 is CL600 RF or BWE 1500 103 CL150 RF 290 20 0 3 80 CL300 RF 750 51 7 CL600 RF or BWE 1500 103 CL150 RF 290 20 0 4 100 CL300 RF 750 51 7 CL600 RF or BWE 1500 103 Table 2 Relief Set Pressu
23. act area and assemble the diaphragm plates system on the sleeve system Tighten screws key 16 using a star criss cross pattern for five times until proper specified torque is achieved Screw the special screws key 68 already on the sleeve to fix the diaphragm plates system on the sleeve system See Torque Specifications Table 3 for proper torque values Tighten screws key 68 using a star criss cross pattern for five times until proper specified torque is achieved Lubricate lower casing key 5 on the diaphragm contact area Carefully insert the trim system into the sleeve guide key 61 utilizing the eye bolts key 35 that fits in the upper spring seat key 73 threaded hole Lubricate the diaphragm key 20 on the upper casing contact area 11 EZH Relief Backpressure Regulator TOP VIEW N N N 1 88 SS SN 52 mus L2 SOE SS LEGACY TRAVEL INDICATOR DETAIL P1766 APPLY LUBRICANT L SEALANT 5 L2 SILICONE BASED GREASE 52 ANAEROBIC METHACRYLATE SEALANT FOR THREADS 1 Lubricant and sealant must be selected such that they meet the temperature requirements TOP VIEW IMPROVED TRAVEL INDICATOR DETAIL Figure 5 Type EZH Travel Indicator Assembly 17 Lubricate and mount the O ring key 69 on the cap key 70 Lubricate and
24. actuator casing key 11 O ring key 9 anti friction split rings Key 8 and anti friction ring key 4 for damage or wear If damage remove the O ring and split rings and replace with new parts Lightly lubricate the O ring and split rings Place the split rings in the body first then slide the O ring between the split rings Lubricate and reinstall the anti friction ring key 4 Remove hex nuts key 26 from the stud bolts key 24 Lift off the lower actuator casing key 5 Remove the hex socket cap screws key 33 and spring lock washers key 32 Lift off the disk holder assembly key 30 and disk retainer key 31 Slide the sleeve key 14 out of the lower actuator casing key 5 and slide the outlet plate key 19 off the sleeve Check the sleeve for scratches burrs or other damage and replace if necessary Inspect the lower actuator casing key 5 O rings keys 9 62 anti friction split rings 8 and anti friction rings key 4 for damage or wear If damaged remove the O ring and split rings and replace with new parts Lightly lubricate the O ring body first then slide the O ring key 9 between the split rings Lubricate and mount O ring key 62 outside of the lower actuator casing key 5 Slide the outlet plate key 19 onto the sleeve key 14 and slide the sleeve into the lower actuator casing key 5 Place the disk holder key 30 and disk retainer key 31 on the sleeve adaptor key 27
25. ator may be installed in any orientation as long as flow through it matches the direction of the arrow on the main valve body 3 Apply pipe compound to the external pipeline threads before installing a relief valve or backpressure regulator with threaded NPT end connections Use gaskets between pipeline and relief valve or backpressure regulator flanges when installing a relief valve or backpressure regulator with flanged end connections When installing butt weld end connections remove trim before welding and make sure to use approved welding practices Use approved piping procedures when installing the relief valve or backpressure regulator When used in relief valve service the Type EZH main valve and pilot both exhaust gas In hazardous or flammable gas service personal injury death or property damage may occur due to fire or explosion of vented gas that has accumulated To prevent such injury or damage provide piping or tubing to vent the gas to a safe location The exhaust piping must be designed and installed to guard against excessive flow restriction This piping must be protected against condensation or debris that could clog it For safety during shutdown vent valves are required immediately upstream and downstream of the main valve on a backpressure or bypass installation 4 If system operation during maintenance is required install isolating and vent valves as needed 5 For the Type PRX 182 pilot if the vent
26. carbon FKM 15 Diaphragm Plate Oo 16 17 Orifice O ring Nitrile NBR Fluorocarbon FKM 18 Lower Cover O ring Nitrile NBR Fluorocarbon FKM 19 Orifice Recommended Spare Part Industrial Regulators Emerson Process Management Regulator Technologies Inc USA Headquarters McKinney Texas 75069 1872 USA Tel 1 800 558 5853 Outside U S 1 972 548 3574 Asia Pacific Shanghai 201206 China Tel 86 21 2892 9000 Europe Bologna 40013 Italy Tel 39 051 419 0611 Middle East and Africa Dubai United Arab Emirates Tel 971 4811 8100 Part Number Key Description Part Number GD25336X012 20 Nut GD00200X012 See Table 2 21 Lower Cover GD29860X012 GD29854X012 22 Disk Holder GD25338X012 Nitrile NBR GD25340X012 M5011018X12 Fluorocarbon FKM M0279950X12 GD05500X012 23 Stem GD25343X012 GD50036X012 24 Nameplate GD26808X012 GD25339X012 25 Stem O ring Nitrile NBR GD01022X012 GG05785X012 Fluorocarbon FKM GD01022X022 GG05785X022 26 Upper Diaphragm Nut GD02800X012 GD25341X012 27 Damper Adjusting Screw with Hole GD25348X012 GD25331X012 28 Restrictor Damper O ring GD02005X022 29 Damper Restrictor Plate GD02012X012 Types PRX 182 and PRX AP 182 GD25440X012 GD02012X022 Types PRX 182 and PRX AP 182 GD25793X012 31 Nameplate Screw GD06100X012 GD01009X012 33 Plug Type PRX 182 GD50032X012 GD01009X022 34 Plug Type PRX 182 GD25792X012 GD25344X012 35 Spring Barrel Extension for AP GD27410X012 Na
27. ed for Type EZH NPS 3 DN 80 Body 14 required for Type EZH NPS 4 DN 100 Body 16 required Recommended Spare Part 2 Parts are not orderable See sleeve subassembly table if it needs to be replaced 16 Part Number 19B2838X012 M6020169X12 M0194530X12 GD89895X012 14767524662 GD29722X012 GD29695X012 GE44420X012 M0300760X12 0194590 12 0191440 12 0192240 12 0300740 12 GD27423X012 GD27260X012 GD27631X012 M0300050X12 GD89893X012 GD89877X012 19B0829X012 GD89872X012 M5011157X12 GD89894X012 M0194440X12 M0194620X12 M0192080X12 M0300020X12 M0194480X12 M0194660X12 0192120 12 0300030 12 GD19445X012 GD19463X012 GD19209X012 M0194750X12 14361524052 1A936224052 GF05679X012 4691022 12 Key Description 22 23 24 25 26 27 28 29 30 31 32 Plain Washer NPS 1 DN 25 Body 16 required NPS 2 DN 50 Body 16 required NPS 3 DN 80 Body 16 required NPS 4 DN 100 Body 16 required Hex Nut NPS 1 DN 25 Body 16 required NPS 2 DN 50 Body 16 required NPS 3 DN 80 Body 16 required NPS 4 DN 100 Body 16 required Continuous Thread Stud Bolt NPS 1 2 and 3 DN 25 50 and 80 Only NPS 1 DN 25 Body 4 required NPS 2 DN 50 Body 6 required NPS 3 DN 80 Body 4 required Intermediate Flange NPS 1 2 and 3 DN 25 50 and 80 Only NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body Hex Nut NPS 1 2 and 3 DN 25 50 and 8
28. ey 143 and tighten with a referenced torque of 3 7 foot pounds 5 0 Nem Lubricate the O ring key 142B and back up rings key 160 2 required Place one back up ring on the stem key 139 followed by the O ring and then the other back up ring Push into groove of the indicator fitting key 141 Slide the travel indicator bushing key 140 over the travel indicator stem key 139 and tighten firmly in place Replace the travel indicator cover key 138 and tighten firmly in place Type PRX 182 Maintenance Figure 7 Always remove spring key 7 tension before performing maintenance on this unit To remove spring tension loosen locknut key 2 and back out adjusting screw key 1 until compression is removed from the spring Lower Diaphragm Maintenance 1 2 Disconnect pilot and remove it from the line Remove machine screws key 10 from lower cover key 21 and the separate lower cover from the body key 16 Use a wrench to hold the stem key 23 and break loose the stem nut key 20 Remove the stem nut and washer key 11 Remove the diaphragm plate key 13 diaphragm key 14 lower diaphragm plate key 15 and O ring key 18 Inspect parts for damage or wear replace if necessary Lightly lubricate the O ring key 25 Place O ring over the stem key 23 and press it down into the body key 16 Lightly lubricate the rims of the diaphragm key 14 and place it on top of the lower diaphragm plate
29. gm overcomes the pilot control spring and opens the pilot valve plug The pilot then exhausts the loading pressure from the main valve diaphragm chamber The pilot continuously exhausts gas when the inlet pressure is above the set pressure The inlet pressure unbalance overcomes the main spring force and opens the diaphragm and plug assembly As the inlet pressure drops below the set pressure the pilot control spring closes the pilot valve plug and the exhaust to atmosphere stops Force from the main spring along with pilot loading pressure pushes the diaphragm and plug assembly onto the knife edged seat producing tight shutoff Backpressure Regulator As long as inlet pressure remains below setpoint the pilot control spring keeps the pilot valve plug closed Inlet pressure passes through the upper port around the upper portion of the valve plug and then through the hollow passage in that valve plug Force from the main spring in addition to pilot loading pressure provide downward loading pressure to keep the main valve diaphragm and plug assembly tightly shut off When inlet pressure rises above the set pressure pressure on the pilot diaphragm overcomes the control spring to close the upper port and stroke the valve plug to open the lower port The pilot exhausts loading pressure from the main valve diaphragm chamber Inlet pressure unbalance overcomes the main spring force to open the diaphragm and plug assembly While the main
30. hen ordering parts When ordering replacement parts reference the key number of each needed part as found in the following parts list Separate kit containing all recommended spare parts is available Parts Lists Type EZH Main Valve Figure 4 Key Description Type EZH Disk Parts Kits NPS 1 2 and 3 DN 25 50 and 80 include keys 29 30 32 33 34 and 62 NPS 4 DN 100 include keys 29 30 32 33 69 71 and 75 NPS 1 DN 25 Nitrile NBR and Fluorocarbon FKM Fluorocarbon FKM NPS 2 DN 50 Nitrile NBR and Fluorocarbon FKM Fluorocarbon FKM NPS 3 DN 80 Nitrile NBR and Fluorocarbon FKM Fluorocarbon FKM NPS 4 DN 100 Nitrile NBR and Fluorocarbon FKM Fluorocarbon FKM Type EZH Full Repair Kits NPS 1 2 and 3 DN 25 50 and 80 include keys 4 7 8 9 15 17 20 28 29 30 32 33 34 62 142B and 143 NPS 4 DN 100 includes keys 8 9 15 17 20 29 30 32 33 34 63 64 67 69 71 75 142B and 143 Recommended Spare Part 1 When retrofitting a Type EZH with pins with the new cage it s also necessary to order the Seat Ring 14 Part Number REZH1X00N12 REZH1X00F 12 REZH2X00N12 REZH2X00F 12 REZH3X00N12 REZH3X00F 12 REZH4X00N12 REZH4X00F 12 Key Description Type EZH NPS 1 DN 25 Nitrile NBR and Fluorocarbon FKM Fluorocarbon FKM NPS 2 DN 50 Nitrile NBR and Fluorocarbon FKM Fluorocarbon FKM NPS 3 DN 80 Nitrile NBR and Fluorocarbon
31. ing gas or bursting of pressure containing parts may result if the Type EZH is installed where its capabilities can be exceeded or where conditions exceed any ratings of the adjacent piping or connections To avoid this install a Type EZH relief valve or backpressure regulator where Service conditions are within unit capabilities including those in the Specifications section Service conditions are within applicable codes regulations or standards Additionally physical damage to the relief valve or backpressure regulator could break the pilot off the main valve causing personal injury and property damage due to escaping gas To avoid such injury or damage install the unit in a safe location 1 Only personnel qualified through training and experience should install operate and maintain a relief valve or backpressure regulator Before installation make sure that there is no damage to or debris in the main valve body or pilot Also make sure that all tubing and piping are clean and unobstructed When installing EZH trim an existing Fisher E body damage can result if flow is not in the correct direction Look at the body web to confirm that flow is in the correct direction up through the center of the cage and down through the cage slots Change the existing flow arrow if necessary After assembly check for shutoff and leakage to atmosphere 2 AType EZH relief valve or backpressure regul
32. key 15 Set the diaphragm plate key 13 on the diaphragm key 14 Lightly lubricate the O ring key 18 and place it in the lower cover key 21 Place the washer key 11 and stem nut key 20 on the stem key 23 and tighten f also performing Upper Case Maintenance skip to step 2 of the Upper Case Maintenance section Insert washers key 11 and machine screws key 10 in the lower cover key 21 and tighten uniformly to ensure proper seal Upper Diaphragm Maintenance 1 2 Disconnect pilot and remove it from the line Loosen locknut key 2 and back out adjusting screw key 1 until compression is removed from the spring Remove cap key 3 Lift the upper spring seat key 6 spring key 7 and O ring key 4 out of the spring case key 8 Inspect O ring and replace if necessary Remove the machine screws key 10 and the washers key 11 separate the spring case key 8 from the body key 16 and lift the lower spring seat key 9 away from upper diaphragm nut key 26 Use a wrench to hold stem key 23 securely while removing the upper diaphragm nut Remove remaining loose components washer key 11 upper diaphragm plate key 13 diaphragm key 14 disk holder key 22 and O ring key 18 Inspect diaphragm and O ring for damage or wear and replace if necessary Remove orifice key 19 and O ring key 17 Inspect the parts for damage or wear and replace if necessary Lightly lubricate the O ring
33. ons large capacity distribution systems and power plant feeds Pilot Descriptions The Type EZH relief valve or backpressure regulator include a Type PRX 182 pilot mounted on the main valve PRX Series pressure reducing pilots have the ability to handle a wide range of setpoints from 29 to 1160 psig 2 0 to 80 0 bar 4 es EMERSON Process Management D103078X012 EZH Relief Backpressure Regulator Specifications Ratings and specifications for the Type EZH are listed in the Specifications section below Specifications for specific relief valve or backpressure regulator constructions are stamped on a nameplate attached to either the main actuator or the pilot spring case Body Sizes End Connection Styles and Pressure Registration Pressure Ratings External See Table 1 Pilot Connections Maximum Inlet and Outlet Casing Pressures 1 4 NPT ToU psig 103 Temperature Capabilities Maximum Emergency Design Casing Pressure Nitrile NBR Version 1500 psig 103 bar 20 to 180 F 29 to 82 C Maximum Operating Differential Pressure Fluorocarbon FKM Version Main Valve 1500 psid 103 bar d 0 to 180 F 18 to 82 C Pilot Between loading pressure in pilot and Options loading sense pressure 1233 psid 85 0 bar d Pre piped Pilot Supply Outlet Pressure Ranges Travel Indicator See Table 2 Minimum Differential Pressures MAIN VALVE MINIM
34. per torque values Carefully lift upper actuator casing and lower actuator casing assemblies keys 11 and 5 and position it in the body key 1 Screw in stud bolts and nuts keys 24 and 26 See Torque Specifications Table 3 for proper torque values Type EZH Relief Backpressure Regulator NPS 1 through 3 DN 25 through 80 Actuator Assembly Maintenance Refer to Figure 4 1 Make a mark on the upper actuator casing key 11 lower actuator casing key 5 intermediate flange key 25 and body key 1 to indicate proper alignment when reassembling the product Remove travel indicator assembly keys 138 139 140 141 142B 143 144 145 160 and 192 if present by loosening the travel indicator fitting Key 141 and lifting out the travel indicator assembly Loosen out the hex nuts key 23 and remove the washers key 22 and the cap screws key 21 Remove all the short bolts first then evenly remove the two long bolts key 39 indicated with LB on the head and brackets key 35 Make sure to balance the upper actuator casing while removing the spring tension Carefully lift the upper actuator casing key 11 off the lower actuator casing key 5 Remove spring key 13 Remove the socket head cap screws key 16 Lift off the diaphragm key 20 and the inlet plate key 18 Remove O rings keys 15 and 17 Inspect the diaphragm and O rings for damage and wear and replace if necessary Inspect the upper
35. re Ranges PILOT CONTROL INFORMATION PILOT RELIEF SET Maximum Maximum TYPE PRESSURE RANGE Wire Diameter Free Length Operating Emergency Part Number Color Pressure Pressure psig bar Inch mm Inch mm psig bar psig bar 29 to 116 2 0 to 8 0 GD25522X012 Black 0 157 3 99 2 16 55 PRX 182 73 to 290 5 0 to 20 0 GD25520X012 Gold 0 197 5 00 2 01 51 609 42 0 1480 102 217 to 609 15 0 to 42 0 GD25519X012 Red 0 236 5 99 2 01 51 PRX AP 182 435to 1160 30 0to 80 0 GD27379X012 Clear 0 335 8 51 3 94 100 1160 80 0 1480 102 Principle of Operation A pressure relief valve is a throttling pressure control device that opens and closes to ensure the inlet pressure does not rise above a predetermined pressure Fisher relief valves cannot be used as ASME safety relief valves A backpressure regulator is a device that controls and responds to changes in the upstream pressure It functions the same as a relief valve in that it opens on increasing upstream pressure Relief Valve As long as the inlet pressure is below the set pressure the pilot control spring keeps the pilot valve plug closed Inlet pressure passes through the restrictor and registers as loading pressure on the main valve diaphragm chamber Force from the main spring in addition to pilot loading pressure provide loading pressure to keep the main valve diaphragm and plug assembly tightly shut off When the inlet pressure rises above the set pressure the pressure on the pilot diaphra
36. ring seat key 73 and lift up and remove the sleeve assembly key 14 Lift off the diaphragm plates system Remove O ring key 15 and replace it as needed Inspect diaphragm for damage or wear remove screws key 16 lift off inlet plate key 18 to replace diaphragm key 20 and O ring key 17 Align screw holes on the cap key 70 to the sleeve guide screw key 66 Remove sleeve guide key 61 utilizing cap key 70 to unscrew Inspect O rings keys 9 and 64 for damage or wear replace anti friction ring key 8 and O ring key 9 if necessary Unscrew 8 cap screws key 6 and remove crush washers key 67 Lift off lower casing key 5 Inspect O ring keys 7 and 63 for damage or wear Replace if necessary Remove cage key 78 Remove seat ring key 2 Inspect seat ring for damage or wear If damaged replace with new parts Remove O ring key 34 from body Inspect for damage or wear If damaged replace with new parts Lubricate O ring key 34 and replace into the body Place seat ring key 2 on top of O ring key 34 in body with the curved side down and seat edge up 10 11 12 13 14 15 16 Place cage key 78 on the top of seat ring key 2 Place lower casing key 5 on top of the body Replace washer key 67 and tighten cap screws key 6 Screw sleeve guide key 61 into lower casing key 5 utilizing cap key 70 Lubricate the sleeve key 14 in the upper plate cont
37. roper torque values Place O ring key 69 on cap Remove eye bolt key 35 from upper spring seat key 73 threaded hole Carefully place the cap on the upper actuator casing key 11 Lubricate cap screws key 77 and attach cap key 70 to the upper casing using cap screws key 77 See Torque Specifications Table 3 for proper torque values Note Rotate the cap key 70 such that the outer holes for sensing lines are in line with upper casing holes for sensing lines To validate the alignment and before attaching cap check that travel indicator is aligned on the cap and on the upper actuator casing 21 Mount O ring key 75 on the space between the cap key 70 and the upper actuator casing key 11 22 Screw the eye bolts key 35 on the cap key 70 NPS 1 through 3 DN 25 through 80 Intermediate Flange O ring Maintenance for Type EZH 1 2 Remove nuts key 26 Carefully lift the upper actuator casing and lower actuator casing assemblies keys 11 and 5 off the body key 1 Remove cap screws key 6 Lift off intermediate flange key 25 Remove O ring key 7 Inspect the O ring for damage or wear and replace if necessary Lightly lubricate O ring before placing in the body key 1 Place the intermediate flange key 25 on the body make sure to position the stud bolt key 24 holes on the outsides of the body key 1 Secure with cap screws key 6 See Torque Specifications Table 3 for pro
38. tural Gas Technologies Emerson Process Management Regulator Technologies Inc USA Headquarters McKinney Texas 75069 1872 USA Tel 1 800 558 5853 Outside U S 1 972 548 3574 Asia Pacific Singapore 128461 Singapore Tel 65 6770 8337 Europe Bologna 40013 Italy Tel 39 051 419 0611 Chartres 28008 France Tel 33 2 37 33 47 00 For further information visit www emersonprocess com regulators TESCOM Emerson Process Management Tescom Corporation USA Headquarters River Minnesota 55330 2445 USA Tels 1 763 241 3238 1 800 447 1250 Europe Selmsdorf 23923 Germany Tel 49 38823 31 287 Asia Pacific Shanghai 201206 China Tel 86 21 2892 9499 The Emerson logo is a trademark and service mark of Emerson Electric Co All other marks are the property of their prospective owners Fisher is a mark owned by Fisher Controls International LLC a business of Emerson Process Management The contents of this publication are presented for informational purposes only and while every effort has been made to ensure their accuracy they are not to be construed as warranties or guarantees express or implied regarding the products or services described herein or their use or applicability We reserve the right to modify or improve the designs or specifications of such products at any time without notice Emerson Process Management Regulator Technologies Inc does not assume responsibility for the selection use or
39. valve is throttling the upper port of the pilot stays closed The pilot exhausts only when it repositions the main valve As inlet pressure drops below setpoint the pilot control spring overcomes the diaphragm force to stroke the valve plug down to close the lower port and open the upper port Force from the main spring along with pilot loading pressure pushes the diaphragm and plug assembly onto the knife edged seat producing tight shutoff EZH Relief or Backpressure Regulator Type EZH Type EZH Single Pilot Relief Valve or Backpressure Regulator Type EZH Adjustment The adjustment of setpoint Figure 7 is performed by means of the pilot adjusting screw which varies the compression of the control spring Adjustment is performed while the relief valve or backpressure regulator is in operation with the aid of a pressure gauge to monitor upstream pressure Loosen the Type PRX pilot locknut and turn the adjusting screw slowly clockwise to increase set pressure and counterclockwise to decrease set pressure Use a pressure gauge to monitor the set pressure until the desired opening pressure is reached Personal injury or equipment damage due to bursting of pressure containing parts may result if this relief valve or backpressure regulator is overpressured or is installed where service conditions could exceed the product and pilot pressure ratings Installation Personal injury equipment damage or leakage due to escap
40. ve continued Key Description 33 Socket Head Cap Screw NPS 1 DN 25 Body 1 required NPS 2 DN 50 Body 2 required NPS 3 DN 80 Body 3 required NPS 4 DN 100 Bogy 4 required 34 O ring 35 Bracket or Eyebolt 2 required NPS 1 DN 25 Body Bracket NPS 2 DN 50 Body Bracket NPS 3 DN 80 Body Eyebolt NPS 4 DN 100 Bogy Eyebolt 36 Nameplate 37 Drive Screw 2 required 38 Travel Indicator Plug NPS 1 2 and 3 DN 25 50 and 80 Bodies NPS 4 DN 100 Body 39 Long Bolt 2 required NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body 43 Caution Warning Label NPS 1 2 and 3 DN 25 50 and 80 Bodies 2 required NPS 4 DN 100 1 required 44 Adjusting Screw NPS 1 DN 25 NPS 2 DN 50 NPS 3 and 4 DN 80 and 100 Bodies 59 Flow Arrow NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body NPS 4 DN 100 Body 60 Protective Cap 2 required NPS 1 2 and 3 DN 25 50 and 80 Bodies Only NPS 1 DN 25 Body NPS 2 DN 50 Body NPS 3 DN 80 Body 61 Sleeve Guide NPS 4 DN 100 Body Only 62 O ring NPS 1 2 and 3 DN 25 50 and 80 Bodies Only 63 O ring 64 O ring Recommended Spare Part Part Number GD89874X012 18B5515X012 GD89869X012 M5011018X12 GD89880X012 GD22096X012 GD27857X012 GD89866X012 M5095001X12 GD29768X012 M0303680X12 GE07221X012 GE00606X012 ERCA01574A0 24B1301X012 24B1301X012 24B1301X012 1V105938982 1V106038982 1V106038982 1V106038982 T13659T0102 T1365
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