Emerson EZH and EZHSO Series Pressure Reducing Regulators Instruction Manual
Contents
1. 2 safety manometric boxes BMS 1 BMS 2 SAFETY MANOMETRIC BOX BMS The pressure data is transformed into a displacement by a safety manometric box BMS 1 mounted on the mechanism box BM This displacement is used to activate the detection stage ofthe mechanism box in the case of overpressure over or underpressure or underpressure condition In certain configurations a second box may be used BMS 2 Bottom mounted integrated valve and regulator NO3 3 BM 1 Mechanism Box with 1 safety manometric box BMS 1 BM2 BMS 1 l y la O us d O a l ai 4 BM 2 Mechanism Box with 2 safety manometric boxes BMS 1 BMS 2 BMS 2 N04 OS2 NACE AG2 5 Diaphragm or bellows Accuracy AG5 Piston Memorization Nomemorization Resistance to vertical shocks 4J 20 shocks Resistance to pendular shocks 9 81 J 20 shocks Sealing IP 68 72 h under 2 m of water Inlet 100 bar Max pressure Impulse 100 bar Ambient temperature 30 to 71 C Max valve travel 50 mm ja A T A 4 s DIMENSIONS mm WEIGHTS ype F m A B kg BM BM 1 for 1 BMS 25 amp Aye 3 BM 2 for 2 BMS 2 5 g s 162 Diaphragm 181 83 2 6 j z P 7 Diaphragm 175 6 12 al BMS 2 _ BMS 27or17 Piston 204 3G 23 oe L k 236 Bellows 202 24 ad J J a 315 Bellows 223 3G 2 8 L 166 HLB For an OS2 with one BMS add the weight of the BMS to that of the BM2. Safety manometric jii box 1 BMS 1 hook kit 7 Safety manometric dhe box 2 BMS 2 hook kit N17 10 BMS piston Safety manometric box BMS base Safety manometric box 1 BMS 1 hook kit Safety manometric Seal box 2 BMS 2 hook kit N18 11 BMS bellows ee Diaphragm Max and or Min Piston Max or Min Bellows Max and or Min Description 162 11 2 27 NACE 17 236 315 Compete box 181071 181072 180999 181323 180998 181073 181074 BMS 1 Base 181105 181106 181107 181322 1181108 181109 181110 Hook kit 181111 Compete box 181084 181085 181070 181069 181086 181087 BMS 2 Base 181105 181106 181107 181108 181109 181110 Hook kit 181112 181112 Diaphragm 137906 142 549 Spare parts 400115 SetofO rings 197 352 400116 197 352 Execution in conformity with the NACE standard MR0175 2001 DESCRIPTION BMS Impulse line The impulse line IS is connected to the network to be protected normally downstream of the regulator e Impulse type Depending on the pressure and precision required different types ofimpulse may be used Diaphragm Piston or Bellows e Springs To cover all pressure ranges a set of springs of equal length and diameter but of different wire diameter 2 to6 5 mm may be used Detection Possible configurations Action by Max only Min only ae 1
3. bellows or piston and guide manually e Assembly gt Proceed in reverse order to disassembly BMS torque values gt Upperspring case manometric box BMS 162 8N m BMS071 5N m BMS piston 27 17 6N m BMS bellows 236 315 6N m gt BMS162and071 nut diaphragm plate 20N m S EMERSON Francel S A 2006 printed in France by MARCOM Francel Characteristics dimension and diagrams only commit Francel after written confirmation Process Management
4. 07 02 2008 Instruction Manual OS NACE NTAOS2NACE0603 March 2006 RELEASE RELAY CONTENTS Release Relay 0S2 1to3 INMtPOAUCUON a ennonn 1 Mechanism BOX ascii sites andasnrnneinetinwniets 2 Safety Manometric BOX ececetescsetesssieeesteesineesiesneeseen 2 Types of installation neesnesneeseeseeenen 2 Characteristics csscisscsssecsseessstsssesesssseesensneeceettnestesnacceestasecnstnaed 3 Dimensions and Weights cccssusssieseeseeeneeeees 3 Mechanism Box BM ccsseesseeeeeeeeeteeesteeeeeteeee 3to6 Description and spare Parts cccueseesesseseees 3 Operationerne ana ira 4 Connections 0 eesceccsteccsseeseeteeesstesesteeesetntestneessnneesnneearnneeeniess 4 Matrial Siansa a R 5 Commissioning e ccceccseteess tees tesesstessetteesstneesnteesrineeseeteaeenees 5 IMAITE NANCE cesisoccs sdeeessveceasterecestcteahsehaseedacenedeiberivieaeecttiee 6 Opts scshie ais tenses site hata aia urease 6 Safety Manometric Box BMS 0 cece 7to 12 Description and spare parts cccusseesseseseese 7 Operation sssini 8 Type OS2 L Connections ccesscsssessessseesessseessessucssessseescsseeseessecsvessenseensecsees 8 rab Spring adjustment range esses 8 O WAIEG So cratic cunetsccesaasaeuneemsieen 10 Adjustment oa sseccsssecsssseccessssesssssessessersestsensesesssestensestsenee n Z Maintenance ccccsssssessssssecsssssesssssessssssessssses
5. 1 i For an OS2 with two BMS add the weight of the two BMS to that of the BM 2 5 Sizes DESCRIPTION AND SPARE PARTS BM Mechanism box assembly ltem Description BM1 BM2 Mechanism box 181067 181068 1 Cap assembly indicator O ring screw 181061 2_ Mechanism box casing 142924 144071 3 BMS gasket 142931 BMS screw 402018 BMS sealing screw o rings 4 Non connectable brace vent 27A5916X012 Ventlink for 8x10 tube 406 526 5 Yoke 181042 Fixed bolt axe do not dismount 142920 6 Bolt 181043 Truarc o ring 406 128 7 Travel stop 140324 Damper 127692 8 Mechanism 181041 Mechanism screw 402512 9 Resetting tool 242915 Sold as a set ref n 197 351 Items in bold are spare parts 6b Mecanism box for 2 BMS 6a Mecanism box for 1 BMS Z X tu N06 CONNECTIONS Non connectable Plastic vent with screen 4 4 NPT Connectable Link for 8 10 tube Contact Box exit 4 2 NPT OS2 NACE DESCRIPTIONAND SPARE PARTS BM Packing gland assembly Packing gland Description Valve OSB VSE Standard Assembly 181089 181090 181104 Packing gland and stem 181040 181040 Packing gland 144126 O ring 400514 400505 400514 O ring 400221 Fastening screw H M7 402028 402 028 Fastening screw H M8 402036
6. 402036 Flatwasher 7 405005 405 005 Flatwasher 8 405006 405006 Items in bold are spare parts OPERATION BM The detection stage consists of two parts e the releasing stem 1 e the 1 stage trigger 2 Through the intermediate ofthe safety manometric box BMS the pressure provokes a pin movement D1 or D2 which provokes the rotation of the releasing stem 1 and frees the 1 stage trigger 2 The power stage consists of two parts e the 2 stage trigger 3 e the cam 4 The 2 stage trigger 3 activated by the 1 stage trigger 2 frees the cam 4 which provokes the valve to close After release the resetting is ensured in two stages detection stage then power stage see commissioning Position indicator The position of the detection stage can be seen through the position indicator glass Memorization The releasing stem will only start moving when pressure ap proaches the pressure set point In all other cases itremains fixed Furthermore the assembly has a very high resistance to shocks If pressure approaches the set point the releasing stem turns butwith the slightest shock or vibration it will go back to it s initial position and pressure returns to normal The mechanismis said to be non memorizing Resistance to shocks This assembly has a remarkable resistance to shocks 20 vertical shocks of 4 J and 20 pendular shocks of 9 81 J with pressure close to set poin
7. 5 0 150 0 400 0 018 Diaphragm 5 0 113201 0 140 0 300 0 650 0 050 MIN 55 113202 0 250 0 600 1 15 0 080 ONLY 6 5 114139 0 450 1 1 2 0 0 170 4 5 113200 1 0 2 0 47 0 350 071 20 5 5 113202 2 1 40 9 5 0 700 6 5 114139 40 8 0 144 16 027 400 5 5 113202 16 0 16 0 19 0 3 0 Piston 6 5 114139 19 0 19 0 38 0 6 5 017 400 5 5 113202 38 0 38 0 50 0 7 0 6 5 114139 50 0 50 0 90 0 12 0 236 5 5 113202 5 5 11 0 16 0 16 Bellows 6 5 114139 8 3 16 0 28 0 2 5 315 72 5 0 113201 17 5 28 0 65 0 5 0 BMS SPRING MAX amp MIN INTERVALS PMS P setting bar A1 amp A2 Type Size box rat Code Min low pt Max high At A2 bar possible pt bar bar 2 0 113195 0 010 0 035 0 004 0 010 2 5 113196 0 025 0 080 0 005 0 025 3 0 113197 0 045 0 140 0 010 0 050 3 5 113198 0 070 0 240 0 014 0 060 162 0 40 113199 0 115 0 380 0 018 0 150 MAX amp Diaphragm 50 113201 0 140 0 750 0 050 0 350 MIN 5 5 113202 0 230 1 3 0 080 0 600 6 5 114139 0 450 2 3 0 170 11 45 113200 1 0 5 1 0 350 25 071 20 5 5 113202 2 1 11 0 0 700 5 5 6 5 114139 40 16 0 1 6 10 0 027 Piston a a Not possible with only 1 BMS 236 5 5 113202 5 5 22 0 1 6 10 0 Bellows 6 5 114139 8 3 35 0 2 5 20 0 315 5 0 113201 17 5 72 0 5 0 33 0 OS2 NACE DEFINITIONS PMS box Maximum operational box pressure Pa Nominal downstream regulator pressure Pamax Maximum downstream regulator pressure normally closing regulator pressure Pamin Minimum downstre
8. AX ONLY BMS SPRING MAX ONLY INTERVALS l PMS A P setting bar A1 Type Size box mm Code Max low pt Recommended range A1 bar possible Max low pt Max high pt bar 2 0 113195 0 010 0 015 0 035 0 004 2 5 113196 0 025 0 040 0 080 0 005 3 0 113197 0 045 0 080 0 140 0 010 3 5 113 198 0 070 0 070 0 240 0 014 ie o 4 0 113199 0 115 0 140 0 380 0 018 Diaphragm 5 0 113201 0 140 0 300 0 750 0 050 5 5 113202 0 250 0 600 1 3 0 080 6 5 114139 0 450 1 2 2 3 0 170 45 113200 1 0 2 0 5 1 0 350 071 20 5 5 113202 2 1 4 0 11 0 0 700 6 5 114139 4 0 8 0 16 0 16 027 400 5 5 113202 16 0 16 0 22 0 3 0 Piston 6 5 114139 22 0 22 0 40 0 6 5 017 100 5 5 113202 40 0 40 0 55 0 7 0 6 5 114139 55 0 55 0 100 0 12 0 236 5 5 113202 55 11 0 22 0 1 6 Bellows 6 5 114139 8 3 16 0 35 0 2 5 315 5 0 113201 175 35 0 72 0 5 0 OS2 NACE SPRING ADJUSTMENT RANGES BMS continued BMS SPRING MIN ONLY INTERVALS PMS P setting bar A1 Type Size box cau Code Min low pt Recommended Range A1 bar possible Min low pt Min high pt bar 2 0 113195 0 010 0 015 0 035 0 004 2 5 113196 0 025 0 040 0 080 0 005 3 0 113197 0 045 0 080 0 150 0 010 3 5 113198 0 070 0 070 0 240 0 014 1z i 40 113199 0 11
9. BMS 1 Releasing screw Active Neutral Active BMS Hook Neutral Active Active BMS 1 Releasing screw Active 2 Hook Neutral BMS BMS 2 Push button Active Neutral Active Hook Neutral Active Active Items in bold are spare parts WW fll lt _Is sesse N19 N20 N21 12c BMS 1 max min OS2 NACE OPERATION BMS The pressure of the network to be protected pushes the dia phragm piston or bellows The force resulting from this opposes the force adjustable Releasing by max pressure BMS 1 BMS 2 Pressure Releasing screw Push button Normal Without D1 pin Without D2 pin contact contact Increase With D1 pin contact With D2 pin contact Set point Rotation ofreleasing stem and 1 stage trigger Onthe mechanismbox 2 H M6x16 screws code 402018 BM sealing Flat O ring and tight shut O rings Onthemanometricbox 1 4 NPT screwed coming from the set point spring When pressure varies the detection rod moves and provokes releasing by max or min pressure Releasing by min pressure BMS 1 BMS 2 Pressure Hook Hook Normal Without D2 pin Without D1 pin contact contact Decrease With D2 pin contact With D1 pin contact Set point Rotation ofreleasing stem and 1 stage trigger Recommended tube 8 10 mm The sensing line must be connected downstream ofthe regulator SPRING ADJUSTMENT RANGES BMS see definitions page 10 M
10. MAX ONLY Adjusting the max push button Remove the hook 2 Then inthe following conditions no pressure in the BMS set pointspring compressed so thatthe distance between the push button 1 and the pin D2 no longer increases adjust the push button 1 to X 1 5 mm detection stage set Jam nut 3 MAX ONLY BMS 1 ADJUSTMENT 2 N23 Adjusting the max only releasing pressure Same procedure as paragraph Adjusting the max only releasing pressure RELEASING BY MIN ONLY Adjusting the min only hook Remove the max push button 1 or screw it tight to neutralize it Jam nut 3 OS2 NACE ADJUSTMENT BMS continued RELEASING BY MIN ONLY CONTINUED Then inthe following conditions set point spring decompressed adjustment screw 5 unscrewed pressure equal to releasing pressure required in the BMS adjust the min hook 2 to Y 1 5 mm detection stage set Jam nut 6 Adjusting min only releasing pressure Same procedure as paragraph Adjusting max only releasing pressure RELEASING BY MAX AND MIN Adjusting the push button The min hook 2 is completely unscrewed Then in the following conditions set pointspringdecompressed adjustmentscrew 5 unscrewed pressure equal to the max releasing pressure required in the BMS adjust the push button 1 toX 0 mm detection stage set Release manually Unscrew the push button 1 2 turns which r
11. Manual control on BM 2 with 1 BMS 1 only Cable 3 wires black brown blue HO5VVE Push button connected at the same place as a BMS 2 3 x 0 75 mm D 6 5 mm Versions f Electrical connections Versions Installation Sealing Connection Mechanical connections Common NF NO Connection co IP 68 Without 1 2 NPT cap C1 Explosion IP 68 Explosion 3 m wire Black Blue Brown Wires C2 proof IP 65 ko Explosion proof connector box PE explosion proof 3 4 5 Screwed wiring C3 Intrinsicalsafe IP 68 i Intrinsical safe tight shutconnector A B C Welded wiring j T PA ey J a Yj ei ma ra f g ian ENET oy Hol ae eee WIRING WIRING WIRING 3m rg J er BY B NF Normally closed FR Hi NF gt BK BU NO Normally opened NF gt BK ayVBU 4 Ne SEKNE NO gt BK BN N13 NO gt BK 3 BN 5 N14 NO gt BK AY BN C N15 Version C1 connection Version C2 connection Version C3 connection Explosion proof connection with cable Explosion proofconnection Explosion proof connection and tight shut packing gland with explosion proof with sealed connector connector box for intrinsic safe 8b Differents versions of BM OS2 connections OS2 NACE SAFETY MANOMETRIC BOX BMS DESCRIPTIONAND SPARE PARTS Safety manometric box BMS base Safety manometric box 1 BMS 1 a hook kit Safety ell manometric j box 2 BMS 2 hook kit N16 9 BMS diaphragm Safety manometric box BMS base
12. See corresponding technical manuals for further details Note The position of the travel stop item 7 drawing 6a depends on the type of assembly and it s size Position A B or C depending on max travel of slam shut valve A 15mm travel B 35 mm travel C 50 mm travel e Mechanism box BM intervention To access the box the cover must be removed When unscrewing the nut a circlips is used to remove the O ring The cover is held on by one screw which can be unscrewed manually or using a socket screw key max recommended couple 2 5 N m e Resetting To reset the slam shut after the fault has been settled the 1 mechanism stage must be reset by manually turning the 1 stage trigger Ifthe slam shut has an internal bypass the cam must be slightly turned using a resetting key to bypass Ifthe slam shut has an external bypass a bypass valve will be used In both cases Wait for the pressure to be equalized before resetting the 2 mechanism stage When resetting the 2 mechanism stage opening of the valve a reset key is used delate Never use an extension pipe with the reset key when resetting the 2 stage max normal couple 16 N m never go over 32 N m Body Bronze Control rod Stainless steel Chromium plating Truarcring Nitrile VALVE TRAVEL STOP CLOSED POSITION N10 A WARNING Risk of injury AUTHORIZED PERSONNEL ONLY A After rearming remove the reset key from the stem Do n
13. am regulator pressure disturbance in function with flow and or inlet pressure is to be considered Pd max Maximum releasing pressure Max high pt High regulator pressure at maximum Max low pt Low regulator pressure atmaximum remaining within the accuracy class Max low pt possible Lowregulator pressure at furthest maximum point precision is not guaranteed Pd min Minimum releasing pressure Min high pt High minimum regulator pressure Min low pt Lowregulator pressure at minimum remaining within the accuracy class Min low pt possible Low regulator pressure at furthest minimum point precision is not guaranteed A1 Minimum difference allowed between Pd max and Pa max and or between Pd min and Pa min A2 Maximum difference allowed between maximum and minimum releasing pressure SELECTION GUIDE LINES PRESSURE LIMITATIONS Max only Min only Max amp Min Pd max lt PMS box BMS Pa max lt PMS box BMS Pd max lt PMS box BMS Pd max lt Max high pt Pd min lt Min high pt Pd max lt Max high pt Pd max gt Max low pt Pd min gt Min low pt Pd max gt Pa max A1 Pd max gt Pa max A1 Pd min gt Pa min A1 Pd min gt Min lowest pt possible Pd min lt Pa min A1 Pd max Pd min lt A2 Note SELECTION OF BMS AND SPRINGS When the set point max or min falls between the lowest and lowest pt possible t
14. epresents a distance of approximately 1 5 mm Jam nut 3 Adjusting the releasing pressure to max and min Max adjustment Same procedure as paragraph Adjusting the max only releasing pressure Min adjustment Admit an average pressure between max and min for example regulator set point pressure Setthe detection stage Admit a pressure equal to the min releasing pressure required Screw the hook 2 progressively until detection stage release Jam nut 6 Check the pressure value at the releasing point adjust if necessary Emerson Process Management Natural Gas Technologies Francel S A Z A La Croix St Mathieu 28320 Gallardon France Tel 33 0 2 37 33 47 00 Fax 33 0 2 37 31 4656 Www emersonprocess com regulators MAINTENANCE BMS e Control gt Slamshutreleasing twice yearly gt Externaltightshut gt Impulse part diaphragm bellows or piston e Disassembly gt Unscrew the connector form the sensing line gt Remove the safety manometric box BMS gt Unscrewtheblockingnutonthe adjustmentscrew manually gt Unscrewtheadjustmentscrew resetting tool gt Remove the hook or plate depending on the type of BMS 1 or 2 from thedetectionrod flat spanner 7 gt Remove the upper case BMS 162 flat spanner 11 BMS071 flat spanner 8 BMS piston 27 17 key 5 BMS bellows 236 315 key 5 gt Disassemble the setplate counter plate Flat spanner 17 and pliers or gt Remove the
15. ey from the stem Do not put fingers in or near the reset mechanism area ADJUSTMENT BMS Generally speaking adjustments are carried outwith the slam shut valve closed Only the detection stage is reset Control of the releasing value may be obtained by reset ting the two stages Warning Before any adjustment check that the spring range installed corresponds to the required set point BMS 1 Diagrams 9 to 11 page 7 RELEASING BY MAX ONLY Adjusting the releasing screw Free the min hook 2 Thenin the following conditions no pressure in the safety mano ar metric box BMS SeA set point spring compressed so 6 7 N22 thatthe distance between the releasing screw and the pin D1 no Y distance betweentalessina longerincreases adjustthe releasing screw and pin D2 screw 1 toX 1 5 mm detection stage set Jam nut 3 X distance between releasing screw and pin D1 Adjusting the max only releasing pressure Admit the releasing pressure to Pd max Screw the adjustmentscrew 5 until detection stage canbe set Unscrew the adjustment screw 5 until detection stage release Check the pressure value at the releasing point adjust if necessary Jam nut 4 RELEASING BY MIN ONLY Adjusting the releasing screw and hook Free the min hook 2 Thenin the following conditions set pointspring decompressed adjustmentscrew 5 unscrewed pressure equal to the releasing pre
16. he precision may pass into a superior range ex ample AG 2 5 gt AG 5 If the pt value is too close to that of the Pa the option RJGI tripping is recommended consult factory In the case of 2 safety manometric boxes BMS both boxes should have a PMS gt to the highest Pd max MATERIALS BMS Chose the type of safety manometric box BMS according to PMS the type of releasing precision PMS Diaphragm Bellows Piston Diaphragm Bellows Piston Piston NACE 0 20 Spring case Zinc pl steel Stainless steel ss C Spring box Aluminium Chromatation a Diaph Nitrile mesh AG25 iaphragm itrile mes l AG5 Piston Stainless steel Max only Bellows eS Min only steel Max amp min Spring Zinc pl steel Stainless steel i i i Adjustment a asia ie icles S E ween releasin ressure inlei Zinc pl steel p and exact ae q ie ue me screw Pistons do not allow for minimum and maximum releasing Choice of springs Max only or min only Take the spring with the highest point directly superior to the releasing pressure required Max and min Take the spring with the highest maximum point superior to the maximum releasing pressure required or with the lowest point inferior to the minimum tripping pressure required 0 OS2 NACE A WARNING A AUTHORIZED PERSONNEL ONLY Risk of injury After rearming remove the reset k
17. ot put fingers in or near the reset mechanism area TRAVEL STOP N11 DETECTION STAGE ip N12 RESET POWER STAGE 8a Release activation stages OS2 NACE MAINTENANCE BM Tools e Spanner 11 screw 7 and 13 or 14 screw 8 e Screwdriver Control gt 1and2 stage mechanism releasing gt Packing glandis tigh shut gt Yoke greasing e Disassembly gt Check that assembly is not under pressure gt Manual release of slam shut drawing n 7 OPTIONS BM gt Manually press on the releasing stem pin D1 or D2 drawing 7 item 1 parallel to the BMS axe gt Unscrew the travel stop screwdriver gt Unscrewthe BM fastening screws flat spanner 11 screw 7 and 13 or 14 screw 8 gt Disassemble the mechanism box BM from the connector by unlocking the yoke Assembly gt Proceed in reverse order to disassembly Remote alert on BM 1 or BM 2 Contact Detects 2 stage releasing power AC DC Remote control Max intensity TOA 0 8A Atmospheric solenoid valve releasing by min pressure for Max tension 400 V 250 V max releasing pressure of 30 bar Safety manometric box S IC T6 i i i ie ightness BMS activated with apneumaticor electro pneumatic impulse Terinere ire 29 C 71 C Fastening 2 M3 screws
18. sssssssssnseeassees 12 INTRODUCTION The OS2 NACE Release Relay consists ofa Mechanism Box integrated in a K1000 K3000 in the case of under or over BM and one or two Safety Manometric Boxes BMS _ pressure in the controlled gas network It may be mounted on It s function is to provoke the activation ofa slam shut valve which systems of DN 25 to DN 150 and up to PN 100 may be stand alone OSB OSE integrated in a regulator It is tight shut and submersible It may be connected to an MP MPS Pilot DRPN ASONEX D C MAX DRPN EZR or g y explosion proof contact intrinsically safe 4 C LERANCEL 9 EMERSON www emersonprocess com regulators Process Ma nagement OS2 NACE MECHANISM BOX BM The mechanism box is designed to close a slam shut valve The operation is ensured in two successive stages a detection stage and a power stage The separation between the detection stage and the power stage provides maximum precision indifferent of working pressure slam shut valve diameter and gas flow After activation of the slam shut valve due to over or under pressure the mechanism box must be reset manually The complete system is available onrequest only sealed with lead and wire TYPES OF INSTALLATION Mounting on horizontal pipeline only Top mounted stand alone valve BMS 1 No1 1 BM 1 Mechanism Box with 1 safety manometric box BMS 1 BMS 2 i 7 BMS 1 N02 2 BM 2 Mechanism Box with
19. ssure required for Pd min inthe BMS adjust the releasing screw 1 toX 2 mm detection stage set Jam nut 3 Putthe hook 2 into position and adjust Y 1 5 mm with nuts 6 and 7 Jam nuts 6 and 7 Adjusting the min only releasing pressure Continue admitting the required releasing pressure Screw the adjustment screw 5 until detection stage release Check the pressure value at the releasing point adjust if necessary Jam lock nut 4 RELEASING BY MAX AND MIN diaphragm or bellows only Adjusting the releasing screw Free the min hook 2 Then inthe following conditions set pointspringdecompressed adjustmentscrew 5 unscrewed pressure equal to the max releasing pressure required in theBMS adjust the releasing screw 1 to X 0 mm detection stage set Release manually Unscrew the releasing screw 1 2 turns which represents a distance of approximately 1 5 mm Jam nut 3 Max adjustment Same procedure as paragraph Adjusting max only releasing pressure Min adjustment Admit an average pressure between max and min forexample regulator set point pressure Setthe slam shut Admit a pressure equal to the min Pd min releasing pressure required Adjust the hook 2 by progressively moving nuts 6 and 7 untilitreleases Jam nuts 6 and 7 Check the pressure value at the releasing point adjust if necessary BMS 2 with 1 max only BMS 1 RELEASING BY
20. t for example 186 mbar for a set point of 200 mbar 4 84 Q X o 24 CAEN NO7 3 2 NO8 6c Standard packing 6d VSE packing gland gland VALVE TRAVEL STOP N09 7 Mechanism CONNECTIONS BM Fixation BM Connector H M7 or H M8 screws 16 N m torque Sealed BM Connector FlatO ring water resistant Packing gland gasresistant Mechanism contact Slam shutvalve Control rod BM connector atmosphere Integrated vent nipple with screen supplied or compression fitting supplied for 8 10 tube not supplied Electrical connection See page 6 The 8 10 tube should be angle shaped on the top to avoid water from entering OS2 NACE MECHANISM BOX BM MATERIAL Packing gland Mechanism Box BM Body Aluminium Chromatation Cover Aluminium Chromatation Box Position indicator Polycarbonate Self jamming ring Steel Phosphatation Cover nut Stainless steel Circlips Steel Phosphatation Allparts Stainless HR Brackets Brass Mechanism Bol Brass Elastic O ring Steel Phosphatation Torsion spring Stainless steel Traction spring Bronze Yoke Self jammingring Steel Phosphatation Flat EPDM O rings Cover Neoprene Truarcring Nitrile COMMISSIONING BM Commissioning differs depending on whether the assembly has an internal or external bypass and whether overpressure releasing is required or not
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