Emerson EZH and EZHSO Series Pressure Reducing Regulators Data Sheet
Contents
1. The slam shut device includes a bypass valve that will allow pressure to be equalized when resetting the device Once the slam shut device has been tripped it must be manually reset For more information about the Type EZH and EZHSO with a slam shut device contact the local Sales Representative or Sales Office Spring Adjustment Ranges BMS BMS Max Only Min Only Max amp Min Intervals Wdso Setting bar Wdsu Setting bar Wdsu Setting bar Al amp A2 PMS Recommended Range Recommended Range Type Size box Max g Min g Min Max m m bar low pt Max Max low pt Min Min low pt high pt bar bar possible low pt high pt possible low pt high pt Possible 0 035 0 010 0 035 0 004 0 010 0 080 0 025 0 080 0 005 0 025 0 150 0 045 0 140 0 010 0 050 0 240 0 070 0 240 0 014 0 060 E 0 400 0 115 0 380 0 018 0 150 fU 0 650 0 140 0 750 0 050 0 350 e 1 15 0 230 1 3 0 080 0 600 2 0 0 450 23 0 170 1 1 4 7 1 0 5 1 0 350 2 9 5 2 1 11 0 0 700 5 5 14 4 4 0 16 0 1 6 10 0 19 0 3 0 S 38 0 Not possible with 6 5 amp 50 0 only 1 BMS 7 0 90 0 12 0 16 0 5 5 22 0 1 6 10 0 e 28 0 8 3 35 0 2 5 20 0 3 315 72 17 5 35 0 72 0 17 5 28 0 65 0 17 5 72 0 5 0 33 0 MECHANISM EOS h RESET PIN WITH BM1 BMS1 BMS2 BM2 BMS1 LOCATION L LU WHITE DOT FOR SWITCH TRIPPING PLATE MANOMETRIC SENSING X DEVICE BM1 CLIP MANOME2. Allowable pressure PS Inlet pressure P Set range P Min operating differential pressure Type EZH AD Type EZHSO AD in Max operating differential pressure Type EZH AD min Type EZHSO AD in Functional Features Accuracy class Type EZH AC Type EZHSO AC Lock up pressure class SG Class of lock up pressure zone SZ Operating temperature TS Shut off device Max operating differential pressure AP max Response time ta Accuracy class Diaphragm and bellows version AG Piston version AG Set pressure range Wau Wao Flanged connections Same Inlet and outlet DN 25 50 80 100 Available only for EZH and EZH OS2 configurations Flange rating PN 16B PN 25 B PN 40 B up to 100 bar 1to 100 bar 1to 80 bar 1 bar 3 8 bar 99 bar 96 2 bar upto 1 upto 2 5 upto 5 upto 5 20 60 C 99 bar o T1s upto 2 5 upto 5 0 010 100 bar ANSI 150 RF ANSI 300 RF ANSI 600 RF Materials Body Connecting parts and bottom Actuator Regulator Slam shut orifice Steel Steel Steel Stainless steel Regulator valve plug Slam shut valve plug Regulator plug disc Slam shut O rings Stainless steel Stainless steel Nitrile or fluorcarbon FKM Nitrile or fluorcarbon FKM EZH and EZHSO Regulators Calculation Procedures Symbols Q Natural gas flow rate in Stm3 h P1 Absolute i
3. Sub critical with P2 gt Q Co UR 3417 P1 P2 0 525 P1 sine C P1 N B The sine argument is expressed in sexagesimal degree Critical state with P2 lt PL 2 Q C 9 0 525 P1 N B The above formulas apply to natural gas flow rate only If the flow rate value Q refers to other gasses divide it by the correction factor F Select the diameter of the regulator with Cg higher than calculated value After finding the DN of the regulator check that gas speed on the seat does not exceed 120 m sec using the following formula Q 1 0 002 P V 345 92 DN 1 P V Velocity m s 345 92 Numerical constant Q Flow rate under standard conditions Stm h DN Regulator nominal diameter mm P nlet pressure in relative value bar Advanced Design Tools EZH and EZHSO Regulators Slam Shut Device The optional slam shut device can provide either overpressure or overpressure and underpressure protection by completely shutting off the flow of gas to the downstream system The slam shut has a mechanism box and a manometric device The manometric device is a spring and diaphragm actuator Its movement activates the detection stage of the mechanism box The shutoff is a two stage process the detection stage and the power stage This separation between detection stage and power stage provides maximum precision alleviating many false trips caused by environmental vibrations
4. Working monitor installations require a Type EZH or EZHSO main valve with a Type PRX 120 or PRX 120 AP working pilot and a Type PRX 125 or PRX 125 AP monitoring pilot for the upstream regulator and a Type EZH or EZHSO with the appropriate Type PRX 120 or PRX 120 AP pilot for the downstream regulator Failure Mode Analysis Part Name Failure Worst Case Cause of Failure Effect Type Regulator Reaction Mode Decrease of feeding pressure FZHSO Open Filter Filter blocked clogged Dirty gas gives decrease of motorization pressure EZH Close Dirty gas EZHSO Open Pilot Disk Pilot cannot be closed microparticles Increase motorization pressure sour qas EZH Open EZHSO Open rot ower Pilot cannot control Ba vey Decrease motorization pressure Diaphragm sour gas EZH Close Pilot Upper Pilot cannot feed the Fabric quality EZH50 Open Decrease motorization pressure Diaphragm regulator sour gas EZH Close Regulator is saa performance Fabrica pog of abs DR and charge EZHSO Open Diaphragm ot the motorization sour gas or discharge of the motorization pressure chamber pressure chamber EZH Close Features Applications EZH and EZHSO Regulators EZH and EZHSO series regulators are used in reduction distribution and conveying stations of suitably filtered natural gas They can also be used for air propane butane LPG city gas nitrogen carbon dioxide and hydrogen Technical Features
5. an OS2 slam shut device for overpressure or overpressure and underpressure protection Type EZHSO Spring to Open pilot operated pressure reducing regulator for low to high outlet pressure Type EZHSO OS2 Type EZHSO pressure reducing regulator with an OS2 slam shut device for overpressure or overpressure and underpressure protection Europe Middle East and Africa Only EZH EZH OS2 EZH and EZHSO Regulators Operation PRX 120 PRX 120 PRX 120 AP E fom on ou on ou ou an LI LJ LJ LC LO me well ae Ei B EZH Regulator EZHSO Regulator BN inlet pressure Wi Regulator motorization pressure M Outlet pressure y Stabilized pressure The pilot operated type EZH uses inlet pressure as the operating medium which is reduced through pilot operation to load the actuator diaphragm Outlet pressure Pd opposes the motorization pressure Pm in the actuator and also opposes the pilot control spring Type EZHSO Spring to Open version uses inlet pressure as the operating medium which is reduced through pilot operation to load the actuator diaphragm lower chamber The upper case of Type EZHSO actuator is filled with pressure coming from stabilizer filter Type SA 2 This pressure on the upper chamber of the regulator actuator diaphragm opposes the main spring force that tends to open the regulator The outlet pressure opposes the pilot control spring For the start up of Type EZHS
6. cog ANSI 150 ANSI 300 25 38 39 40 50 71 74 75 80 145 151 153 100 211 224 239 Note For EZHSO version add 1 kg EZH DN 100 with PRX Pilot Horizontal Position Overall Dimensions mm DN A C H ANSI ANSI ANSI PN PN PN B PRX PRX E PRX PRX l J K 150 300 600 16B 25B 40B Horizontal Vertical Horizontal Vertical 25 184 197 210 193 5 62 404 282 225 238 190 113 210 50 254 267 286 254 267 83 445 287 287 267 286 144 197 S 80 298 317 337 310 317 105 532 425 400 325 349 200 337 100 352 368 394 350 368 137 442 427 480 342 394 240 140 2 Available only for EZH and EZH OS2 configurations Threaded 1 4 NPT female impulse connections Overall Dimensions and Weights Mechanism box Y removal clearance EZH OS2 and EZHSO OS2 with PRX Pilot Vertical Position Weights kg 2 PN 16B PN25B PN40B ciego ANSI 150 ANSI 300 25 49 50 5 50 81 83 85 80 168 175 177 100 237 250 265 Note For EZHSO version add 1 kg Slam Shut Overall Dimensions mm EZH and EZHSO Regulators n Y Mechanism box removal clearance EZH OS2 and EZHSO OS2 DN 25 50 and 80 with PRX Pilot Horizontal Position E Indicator
7. cover removal clearance DN F G Diaphragm Piston Bellows Diaphragm Piston Bellows 25 50 181 204 223 162 71 74 Mechanism box 80 Y removal clearance 100 EZH OS2 DN 100 with PRX Pilot Horizontal Position Overall Dimensions mm DN A C H ANSI ANSI ANSI PN PN PN P PRX PRX D E PRX PRX l J K 150 300 600 16B 25B 40B Horizontal Vertical Horizontal Vertical 25 184 197 210 193 5 250 404 282 315 225 238 190 113 210 35 50 254 267 286 254 267 265 445 287 330 287 267 286 144 197 80 298 317 337 310 317 301 532 425 366 400 325 349 200 337 B 100 352 368 394 350 368 345 442 427 410 480 342 394 240 140 Available only for EZH and EZH OS2 configurations Threaded 1 4 NPT female impulse connections Natural Gas Technologies Emerson Process Management Regulator Technologies Inc O M T Francel S A Officina Meccanica Tartarini s r l Z A La Croix Saint Mathieu Via P Fabbri 1 28320 Gallardon 40013 Castel Maggiore Bologna Italy France Tel 39 0514190611 T l 33 0 2 37 33 47 00 Fax 39 0514190715 Fax 33 0 2 37 31 46 56 E mail info tartariniggemersonprocess com For further information visit www emersonprocess com regulators The Emerson logo is a trademark and service mark of Emerson Electric Co All other marks are the property of their
8. is performed by means of the pilot adjusting screw which causes variation of the compression of the control spring Adjustment is performed while the regulator is in operation with the aid of a pressure gauge to monitor downstream pressure The shut off valve downstream of the regulator must not be completely closed it is necessary that a small quantity of gas flows downstream to allow the outlet side to vent when it is necessary to lower the pressure EZH and EZHSO Regulators Operation Monitoring System Monitoring regulation is overpressure protection by containment therefore there is no relief valve to vent to the atmosphere When the working regulator fails to control the pressure a monitor regulator installed in series which has been sensing the downstream and control pressure goes into operation to maintain the downstream pressure at a slightly higher level than normal pressure During an overpressure situation the monitoring system keeps the customer on line Wide Open Monitoring Systems PRX 120 a H PRX 120 PRX 120 AP PRX 120 AP ere EZH Monitor EZHSO Regulator Bl Inlet pressure B Regulator motorization pressure EU stabilized pressure E Monitor motorization pressure Outlet pressure This figure shows an upstream wide open monitor Type EZH and a downstream active regulator Type EZHSO Spring to Open In this installation if the Type EZHSO no longer controls the outlet pressure i
9. prospective owners Fisher is a mark owned by Fisher Controls Inc 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 does not assume responsibility for the selection use or maintenance of any product Responsibility for proper selection use and maintenance of any Emerson Process Management product remains solely with the purchaser w EMERSON NCAEZHO903ENOEmerson Process Management Regulator Technologies Inc 07 2011 All Rights Reserved
10. Cage EZH and EZHSO Regulators e Bubble tight shutoff The Type EZH and EZHSO have a knife edged metal plug and a soft seat which provides bubble tight shutoff for use in applications where positive shutoff is required For example dead end systems Plug e Accurate pressure control The Type EZH and EZHSO use the Type PRX and SA 2 pilot system to provide stable and accurate downstream pressure control regardless of load changes or Trim assembly inlet pressure variations e Easy maintenance system A top entry design reduces maintenance time Trim parts can be inspected cleaned and replaced without removing the body from the pipeline An innovative system has been designed for the EZH DN 100 which allows maintenance to be carried out by a single operator Maintenance is carried out by simply removing the top plug extracting the trim assembly 12 3 kg removing the pad holder and then changing the pad Easy and fast maintenance no special tools requirement makes the EZH ownership low in cost e Spring to close and spring to open versions Optional positions to choose from in case of main valve diaphragm failure or lack of supply pressure to the pilot See table on page 6 for Failure Mode Analysis EZH DN 100 Patent Pending Easy Maintenance System Configurations Type EZH Pilot operated pressure reducing regulator for low to high outlet pressure Type EZH OS2 Type EZH pressure reducing regulator with
11. O it s necessary to install a vent valve in type PRX pilot bleed line connection line from port S to downstream pipe in order to vent the pressure from actuator lower chamber to close the regulator Opening When the outlet pressure Pd drops below the setting of the pilot control spring pilot control spring force on the pilot diaphragm thus opens the pilot valve plug providing additional motorization pressure Pm to the actuator diaphragm This diaphragm motorization pressure opens the main valve plug supplying the required flow to the downstream system Any excess motorization pressure on the actuator diaphragm escapes downstream through the bleed restriction in the pilot Closing EZH When the gas demand in the downstream system has been satisfied the outlet pressure Pd increases The increased pressure is transmitted through the downstream control line and acts on the pilot diaphragm This pressure exceeds the pilot spring setting and moves the diaphragm closing the orifice The motorization pressure Pm acting on the main diaphragm bleeds to the downstream system through a bleed restriction in the pilot EZHSO When the outlet pressure Pd increase over the setting of the pilot spring the pilot valve disk will be closed reducing motorization pressure Pm to the lower chamber of the regulator actuator diaphragm the pressure in the upper chamber will force the regulator to close Adjustment The adjustment of the regulator
12. PRESSURE REGULATORS Type EZH and EZHSO EMERSON EZH and EZHSO Regulators Pressure Regulators Type EZH and EZHSO Spring to Open regulators are accurate pilot operated pressure balanced soft seated regulators They are designed for use in high pressure natural gas transmission city gate stations large capacity distribution systems and power plant feeds They provide smooth reliable operation tight shutoff and long life The main benefits are as follows Long life in severe service applications High resistance to aromatics and particle erosion Noise attenuation module optional e High turn down capacity for systems with large variations in downstream flow demand e Absolutely no bleed to atmosphere e Wide range of flow coefficients for each body size Bubble tight shutoff e Accurate pressure control Low temperature standard version Integral strength Easy maintenance system e Spring to close and spring to open versions Long life in severe service applications The Type EZH and EZHSO utilize a metal plug design to deflect particles and debris away from the soft seat which gives enhanced resistance to particle erosion to provide a longer service life In addition the Type EZH and EZHSO can be constructed with fluoroelastomer soft parts to extend service life in applications where liquid aromatics are entrained in the qas High turn down capability The oversized diaphragm and unique pilo
13. TRIC DEVICE THREADED STEM SLIDING CLEVIS SECOND STAGE RELEASING SHAFT TRAVEL STOP L Mechanism Box BM1 with One Manometric Sensing Device BMS1 Mechanism Box BM2 with Two Manometric Sensing Devices BMS1 and BMS2 STEM SCREW AND FLAT WASHER OS2 Internal Parts RESETTING TOOL CAP SCREW BONNET EZH and EZHSO Regulators Applications and Construction Guide 2 Mechanism Box Manometric Sensing Device Application BM1 BM2 BMS1 BMS2 Overpressure Shut off OPSO Yes No Yes No Underpressure Shut off UPSO Yes No Yes No Overpressure Shut off OPSO and Underpressure Shut off UPSO Yes No Yes No Overpressure Shut off OPSO and Underpressure Shut off UPSO No Yes Yes 2 Yes Overpressure Shut off OPSO Overpressure Shut off OPSO and Underpressure Shut off UPSO No Yes Yes Yes 1 When using one manometric sensing device BMS1 for both overpressure and underpressure shutoff make sure that the difference between set pressures falls within the maximum range shown in above table Spring Adjustment Ranges 2 When using two manometric sensing devices BMS1 and a BMS2 the BMS1 can only be used for high trip Versions of Explosion Proof Limit Switches 1 i i Electrical connections Versions Installment Tightness Connection Mechanical connections C
14. nlet pressure in bar P2 Absolute outlet pressure in bar om Flow rate coefficient C1 Body shape factor d Relative density of the gas Flow Coefficients TYPE EZH DN25 50 80 and 100 TYPE EZHSO DN 25 50 and 80 Reduction Slam Shut X Body Without Slam Shut E Body DN 25 DN 50 DN 80 DN 100 DN 25 DN 50 DN 80 DN 100 0 284 1078 2247 3567 280 1088 2266 3696 Qf 1 210 908 1684 2969 218 829 1698 2902 2 126 671 1058 1763 128 607 1066 1784 3 79 385 685 1062 81 370 690 1072 0 550 2092 4359 6920 544 2110 4396 7170 E 1 408 1762 3266 5760 423 1609 3294 5630 2 245 1301 2052 3420 249 1177 2069 3460 3 154 746 1328 2060 157 718 1339 2080 0 31 3 38 3 30 6 32 4 35 5 33 5 30 8 31 4 c 1 34 3 35 3 33 9 35 2 38 7 31 9 33 9 34 2 2 33 6 36 6 37 8 37 4 39 7 35 6 37 8 36 3 3 32 1 40 8 33 6 37 1 39 3 38 2 33 6 37 3 Regulator travel mm 9 17 25 30 9 17 25 30 Slam shut travel mm 15 30 50 Flow Rate Q Sub critical state with P2 gt gt Q 0525 C Pise 3417 P1 P2 C1 P1 N B the sine argument is expressed in sexagesimal degree Critical state with P2 lt 1 xc Fa Q 0 525 E P1 Air 1 0 78 City gas 0 44 1 17 For other gases with different densities the flow rate Butane 201 0 55 calculated with the above formulas must be multiplied by the correction factor Propane 199 dis Nitrogen 0 97 0 79 0 6 Carbon dioxide 1 52 0 63 A A Hydrogen 0 07 2 93 EZH and EZHSO Regulators DN Sizes Calculate the required C with the following formula
15. ommon NF NO Connection CO IP 68 Without Cap 1 2 NPT C1 Explosion proof IP 68 Explosion proof 3m wire Black Blue Brown Wires C2 Explosion proof IP 65 Explosion proof Come nv EXpIGSIOR pirogi 3 4 5 Screwed wiring PE explosion proof C3 Intrinsically safe IP 68 Explosion proof Intrinsically safe tight shut connector A B C Welded wiring j P5 PA sms S a WIRING NIC e Q n zt iO sse 3m NF Normally Closed NO Normally Open C1 Contact Version Explosion proof connection with cable and tight shut packing gland ce K A el nile nF ee sf E J L dil 7 Z ls HIRING g RAD BU i E BKO 5 BN RETI 2 BN Lj rmi RA i NF l ae 4 ME d ov Ene eem C2 Contact Version C3 Contact Version Explosion proof connection Explosion proof connection with with explosion proof tight shut connector for Bl Inlet pressure connector box intrinsically safe I Regulator motorization pre
16. ssure PRX 120 PRX 120 AP Outlet pressure BU Stabilized pressure EZH and EZHSO Regulators Pilots PRX Series SA 2 The Type EZH and EZHSO pressure reducing regulator includes a PRX Series pilot mounted on the Type EZH and EZHSO main valve for pressure reducing or wide open monitoring applications PRX Series pressure reducing pilots have the ability to handle a wide range of set points from 1 to 80 bar Type PRX 120 Outlet pressure range of 0 5 to 42 bar The Type PRX 120 can be used as the pilot on single stage pressure reducing regulators or as the monitor pilot or as the working pilot in wide open monitor systems Type PRX 120 AP Outlet pressure range of 30 to 80 bar The Type PRX 120 AP can be used as the pilot on single stage pressure reducing regulators or as the monitor pilot or as the working pilot in wide open monitor systems Type PRX 125 Identical to the Type PRX 120 except the restriction screw is removed The Type PRX 125 can only be used as the monitor override pilot on working monitor applications Type PRX 125 AP Identical to the Type PRX 120 AP except the restriction screw is removed The Type PRX 125 AP can only be used as the monitor override pilot on working monitor applications The Type SA 2 Pilot supply filter regulator provides a constant supply pressure to the PRX Series pilot that is 3 bar over set pressure The Type SA 2is equipped with a 5n filtering degree filter and is
17. suitable for heating Apple Allowable Body and o tina Monit Set Range Regulator or perating Monitor cial W bar na Monitor Regulator Monitor Pen Watena PRX 120 PRX 120 PRX 125 0 5 42 m a a NENNEN 100 e NE Steel PRX AP 120 PRX AP 120 PRX AP 120 30 80 1 4 NPT female threaded connections The SA 2 pressure pre reducer must be used with PRX series pilots Allowable Pressure Body and Covers Model PS bar Supplied Pressure Material SA 2 100 3 bar Downstream pressure Steel EZH and EZHSO Regulators Examples of Connections PRX 120 d PRX 120 PRX 120 AP PRX 120 AP EZH OS2 Monitor Regulator EZH OS2 Monitor with OS2 Slam Shut and EZH Regulator PRX 120 PRX 120 AP Monitor Regulator EZH Monitor and EZH Regulator B Inlet pressure MH Monitor motorization pressure Outlet pressure I Regulator motorization pressure MW stabilized pressure R To the heating system EZH and EZHSO Regulators Overall Dimensions and Weights E H EZH and EZHSO DN 25 50 and 80 with PRX Pilot Horizontal Position EZH and EZHSO with PRX Pilot Vertical Position E E sla H 5 Indicator cover KS removal clearance Weights kg y PN16B PN25B PN40B
18. t will remain open letting the Type EZH requlator to reach the required outlet pressure In case of failure of the Type EZH it will close and protect the downstream system from overpressure condition EZH and EZHSO Regulators Operation Working Monitoring System PRX 125 A PRX 120 A PRX 120 PRX 120 AP PRX 120 AP EZH Monitor EZH Regulator E Inlet pressure B Regulator motorization pressure EN Stabilized pressure zu Intermediate pressure E Monitor motorization pressure Outlet pressure In a working monitoring system the upstream regulator requires two pilots and it is always the monitoring regulator In this way both units are always operating and can be easily checked for proper operation In normal operation the working regulator controls the outlet pressure of the system The monitoring regulator s working pilot PRX 120 or PRX 120 AP controls the intermediate pressure and the monitor pilot PRX 125 or PRX 125 AP senses the system s outlet pressure If the working regulator fails the monitoring pilot PRX 125 or PRX 125 AP will sense the increase in outlet pressure and take control The working regulator must be rated for the maximum allowable operating pressure of the system because this will be its inlet pressure if the monitoring regulator fails Also the outlet pressure rating of the monitoring pilot PRX 125 or PRX 125 AP and any other components that are exposed to the intermediate pressure must be rated for full inlet pressure
19. ting system of the Type EZH and EZHSO allow for a 100 1 turn down ratio which will provide superior pressure control in systems with large variations in downstream flow demand Noise attenuation module The EZH and EZHSO offer an optional Whisper Trim Cage which is integral to the regulator therefore maintaining the advantages of it s compact design The Whisper Trim Cage is available on DN 50 80 and 100 It allows for a noise attenuation up to 8 dB Absolutely no bleed to atmosphere The Type EZH and EZHSO eliminate nuisance and wasteful bleed gas to atmosphere by utilizing a pilot operated control system which bleeds 100 of the gas to the downstream system while the regulator is operating Wide range of flows coefficients for each body size The EZH and EZHSO offer the possibility of flow reduction ranges according to each body size This is achieved by simply replacing the standard seat by a reduction seat NOISE LEVEL dBA Europe Middle East and Africa Only e ZH AND EZHSO SERIES WITH STANDARD CAGE e ZH AND EZHSO SERIES WITH 0 WHISPER TRIM CAGE 9400 18900 28400 37500 47100 56800 66200 75700 85100 FLOW RATE Nm h Noise Comparison Diagram Beit sh i cu s LS E _ zt ma Pig Pha a par ecitiatuate Seteletafelegantesescsseensmis MEAM M RESER SR eee eruta n a Fa Py afta Zameen essai i L aua s Whisper Trim
Download Pdf Manuals
Related Search