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Instruction Manual
D103680X012
May 2019
Types EZH and EZHSO Pressure Reducing Regulators
CONTENTS
Introduction ..................................................................... 2
Characteristics ................................................................ 3
Labelling .......................................................................... 5
Dimensions and Weights ................................................ 6
Description ...................................................................... 8
Principle of Operation ...................................................... 8
Monitoring Systems ......................................................... 12
Installation ...................................................................... 14
Startup and Adjustment .................................................. 16
Shutdown ........................................................................ 18
Maintenance ................................................................... 19
Troubleshooting .............................................................. 26
Spare Parts ..................................................................... 28
Parts List ......................................................................... 28
WARNING
!
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™ regulators must be installed,
operated and maintained in accordance
with federal, state and local codes, rules
and regulations and Emerson Process
Management Regulator Technologies,
Inc. instructions.
If the 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 regulator.
Types EZH and EZHSO
Figure 1. Type EZH Pressure Reducing Regulator
Figure 2. PRX Series Pressure Reducing Pilots
TYPE PRX-120
Types EZH, EZHSO, EZH OS2 and EZHSO
OS2 regulators are in conformity with the
Pressure Equipment Directive PED 2014/68/EU
and are classified in Category IV.
R94
TYPE PRX-120/AP
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Related Manuals for Emerson FISHER EZH Series
Summary of Contents for Emerson FISHER EZH Series
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Page 1: Table Of Contents
Fisher™ regulators must be installed, operated and maintained in accordance with federal, state and local codes, rules and regulations and Emerson Process Management Regulator Technologies, Inc. instructions. If the regulator vents gas or a leak develops in the system, service to the unit may be required. -
Page 2: Introduction
Types EZH and EZHSO INTRODUCTION • 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 Scope of the Manual stage pressure reducing regulators, as the monitor pilot This manual provides installation, startup, maintenance or as the working pilot in wide-open monitor systems. -
Page 3: Characteristics
Types EZH and EZHSO Regulator Options • Type RPE Electrical Pilot Heater (Figure 27) The Type RPE is used for reheating the gas supplying • Silencer (Figure 24) pressure reducing regulator pilots. The Type RPE avoids The Type EZH silencer (Whisper III) is integrated in the the inconveniences caused by freezing which can occur regulator and is composed of a drilled cage. - Page 4 Types EZH and EZHSO Table 3a. 2:1 Line Flow Coefficients, Regulator and Slam-Shut Travel TYPES EZH AND EZHSO WITH SLAM SHUT (X BODY) WITHOUT SLAM SHUT (E BODY) REDUCTION DN 25 DN 50 DN 80 DN 100 DN 150 DN 25 DN 50 DN 80 DN 100...
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Page 5: Labelling
Types EZH and EZHSO Connections Material Inlet/Outlet : CL150 RF - CL300 RF - CL600 Body: Steel Connecting parts and bottom: Steel PN 16B - PN 25B - PN 40B Actuator: Steel Other configurations available Regulator/Slam-shut orifice: Stainless steel (contact factory) Regulator valve plug: Stainless steel Pilot feed:... -
Page 6: Dimensions And Weights
Types EZH and EZHSO DIMENSIONS AND WEIGHTS Figure 5. Dimensions - Types EZH OS2 and EZHSO OS2 (Horizontal Position) DN 25, 50, 80 DN 100, 150 Indicator cover removal clearance Indicator cover removal clearance 25 mm Mechanism box removal clearance 25 mm 25 mm 25 mm... - Page 7 Types EZH and EZHSO Indicator cover Indicator cover Figure 7. Dimensions - Types EZH and EZHSO removal clearance removal clearance (Horizontal Position) DN 25, 50, 80 DN 100, 150, 200 Indicator cover Indicator cover Indicator cover Indicator cover Indicator cover removal clearance removal clearance Indicator cover...
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Page 8: Description
Types EZH and EZHSO Figure 9. Type EZH DN 25/50/80 (Spring-to-Close Version) Operational Schematic Upper diaphragm Type PRX/120 Pilot disk Type SA/2 Filter Lower Regulator diaphragm diaphragm Inlet pressure (P INLET PRESSURE (Pu) MOTORIZATION PRESSURE (Pm) Motorization pressure (P Type EZH Pilot feeding pressure (P PILOT FEEDING PRESSURE (Pup) Type SA/2:... - Page 9 Types EZH and EZHSO Figure 10. Type EZH-OS2 DN 100/150 (Spring-to-Close Version) Operational Schematic Inlet pressure (P INLET PRESSURE (Pu) Motorization pressure (P MOTORIZATION PRESSURE (Pm) Pilot feeding pressure (P PILOT FEEDING PRESSURE (Pup) Outlet pressure (P OUTLET PRESSURE (Pd) Atmospheric pressure (P ATMOSPHERIC PRESSURE (Pb) Type PRX:...
- Page 10 Types EZH and EZHSO Figure 11. Type EZHSO DN 25/50/80 (Spring-to-Open Version) Operational Schematic Upper diaphragm Type Pilot disk PRX/120 Filter Type Regulator SA/2 diaphragm Lower diaphragm Inlet pressure (P INLET PRESSURE (Pu) Type EZHSO Motorization pressure (P MOTORIZATION PRESSURE (Pm) Pilot feeding pressure (P PILOT FEEDING PRESSURE (Pup) Type SA/2:...
- Page 11 Types EZH and EZHSO Figure 12. Type EZHSO DN 100/150/200 (Spring-to-Open Version) Operational Schematic Inlet pressure (P INLET PRESSURE (Pu) Motorization pressure (P MOTORIZATION PRESSURE (Pm) Pilot feeding pressure (P PILOT FEEDING PRESSURE (Pup) Type SA/2: Type PRX: Outlet pressure (P OUTLET PRESSURE (Pd) V - Sensing S - Bleed port...
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Page 12: Monitoring Systems
Types EZH and EZHSO Figure 13. Upstream Wide-Open Monitoring System Operational Schematic for DN 25, 50 and 80 Type SA/2 Type Type Type SA/2 Type EZH Type EZHSO Inlet pressure (P INLET PRESSURE (Pu) Motorization pressure (P MOTORIZATION PRESSURE (Pm) Pilot feeding pressure (P PILOT FEEDING PRESSURE (Pup) Type SA/2:... - Page 13 Types EZH and EZHSO Figure 14. Working Monitoring System Operational Schematic with Two EZH (Spring-to-Close) for DN 25, 50 and 80 Type Type Type PRX/120 PRX/120 PRX/125 Type SA/2 Type SA/2 Type EZH Type EZH R100 Inlet pressure (P INLET PRESSURE (Pu) Motorization pressure (P MOTORIZATION PRESSURE (Pm) Pilot feeding pressure (P...
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Page 14: Installation
Types EZH and EZHSO Working monitor installations require a Type EZH or The regulator must be installed on horizontal EZHSO main valve with a Type PRX/120 or PRX/120-AP pipeline. For the version with slam shut, the working pilot, a Type PRX/125 or PRX/125-AP monitoring release relay must be situated towards the pilot for the upstream regulator and a Type EZH or EZHSO bottom. - Page 15 Types EZH and EZHSO All Installations It is recommended to install and isolation tap and a vent tap. These can be useful for slam- (Single Regulator or Monitor Systems) shut settings and verifications. A Type EZH or EZHSO regulator bleeds no gas to Check that the pilot impulse is connected atmosphere during normal operation, thus making and in the case of an isolating tap (not...
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Page 16: Startup And Adjustment
Types EZH and EZHSO STARTUP AND ADJUSTMENT 4. Connect the actuator to the downstream sense line on a straight run of outlet pipe 8/10 (inside diameter). Connect the other end of that impulse Pre-startup Considerations to the Type PRX port. 5. - Page 17 Types EZH and EZHSO Note For a working monitor installation, adjust the setpoint of the upstream monitor pilot to the desired When using a Type SA/2 pilot supply filter maximum pressure. Adjust the upstream working pilot regulator, the differential pressure across to the desired intermediate pressure setting.
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Page 18: Shutdown
Types EZH and EZHSO SHUTDOWN Figure 15. Setpoint Verification Phase Travel Travel Travel CAUTION stop stop stop If the pilot bleed control line pressure is shut down first, the downstream system may be subjected to full inlet pressure (P R121 TRIGGERED STAGE 1 STAGES 2 AND 3... -
Page 19: Maintenance
Types EZH and EZHSO MAINTENANCE 5. 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 For both Types EZH and EZHSO DN 100, 150 and 200, placing in the body (key 1). - Page 20 Types EZH and EZHSO Disk Maintenance DN 100, 150 and 200 15. Lubricate the sleeve (key 14). (Figures 17 and 18) 16. Carefully insert the trim system into the sleeve guide (key 61) utilizing eye bolt (key 35). Align sleeve utilizing 1.
- Page 21 Types EZH and EZHSO 21. Mount O-ring (key 75) on the cap. 4. For EZH Series: Remove screws, washers and hex nuts (keys 21, 22 and 23). Remove all the screws first, 22. Screw the eye bolts (key 35) on the cap (key 70). then the two threaded stems and bracket.
- Page 22 Types EZH and EZHSO 8. Remove screws (key 24). Lift off the lower actuator Note casing (key 5). When tightening fasteners arranged in a For EZH Series: Remove screws (key 33) and spring circular pattern, alternate the tightening lock washers (key 32). Lift off the disk holder assembly of each fastener with the fastener directly (key 30) and disk retainer (key 31).
- Page 23 Types EZH and EZHSO Actuator Assembly Maintenance DN 100, 150 Note and 200 (Figures 17 and 18) The key 9 O-rings may need removed and stretched by hand in order for the sleeve 1. Remove travel indicator assembly (keys 71, 138, 139, assembly to have sufficient clearance to 140, 141, 142, 143, 144, 145 and 192), if present, slide back into the sleeve guide.
- Page 24 Types EZH and EZHSO Lower Case Maintenance 18. Lubricate threads on bolts (key 21). 19. Bolt together the upper and lower actuator casings 1. Disconnect pilot and remove it from the line. using bolts (key 21), washers (key 22) and nuts 2.
- Page 25 Types EZH and EZHSO Upper Case Maintenance 4. Remove restrictor adjusting screw with hole (key 32). Remove and inspect O-ring (key 28) for damage 1. Disconnect pilot and remove it from the line. or wear and replace if necessary. Lightly lubricate 2.
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Page 26: Troubleshooting
Types EZH and EZHSO TROUBLESHOOTING Type SA/2 Pilot Supply Filter Regulator Maintenance (Figure 26) Servicing Check 1. Disconnect pilot supply filter regulator and remove Operations concerning the integral slam-shut it from the line. version are in italic. 2. Remove bolts, washers and nuts (keys 2, 9 and 10) Recommended frequency from the body (key 7), then separate upper and lower covers (keys 19 and 11) from the body (key 7). - Page 27 Types EZH and EZHSO Table 9. Troubleshooting for Types EZH and EZHSO Regulators SYMPTOM CAUSE ACTION If outlet pressure is stable Observe the evolution of the inlet pressure If inlet pressure decreases External leak Locate and repair leak or contact after-sales Increase the set point until tripping occurs If inlet pressure is stable The regulator is tightshut...
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Page 28: Spare Parts
Types EZH and EZHSO SPARE PARTS Different parts of the equipment are subject to normal The frequency of control and replacement of parts depends wear: they must be checked periodically and replaced on the working conditions as well as any applicable codes if necessary. - Page 29 Types EZH and EZHSO Type EZHSO (Figures 18, 19) Type PRX Pilot (Figure 25) Description Description Protective cap Adjusting screw Stem Locknut Upper spring axe Lower spring axe O-ring 150* Anti-friction ring O-ring Stem nut Spring carrier plate Hex nut Spring 153* O-ring...
- Page 30 Types EZH and EZHSO Figure 16. Type EZH Main Valve Assembly (DN 25, 50 and 80) TRAVEL INDICATOR DETAIL TYPE EZH DN 25 VERSION ONLY TYPE EZH DN 80 VERSION ONLY DN 25-50 R102...
- Page 31 Types EZH and EZHSO Figure 17. Type EZH Main Valve Assembly (DN 100) TRAVEL INDICATOR DETAIL R103...
- Page 32 Types EZH and EZHSO Figure 18. Type EZH Main Valve Assembly (DN 150 and 200) Apply Lubricant (L) / Sealant (S) L2 = Silicone-based or PTFE-based grease S2 = Anaerobic methacrylate sealant for threads FOR DN 200 ONLY S3 = General purpose medium bond strength threadlocker 1.
- Page 33 Types EZH and EZHSO Figure 19. Type EZHSO Main Valve Assembly (DN 25, 50 and 80) TRAVEL INDICATOR DETAIL TYPE EZHSO DN 25 VERSION ONLY TYPE EZHSO DN 80 VERSION ONLY 147 151 193 153 R102c...
- Page 34 Types EZH and EZHSO Figure 20. Type EZHSO Main Valve Assembly (DN 100) TRAVEL INDICATOR DETAIL...
- Page 35 Types EZH and EZHSO Figure 21. Type EZH Main Valve Assembly (DN 150 and 200) FOR DN 200 ONLY Apply Lubricant (L) / Sealant (S) L2 = Silicone-based or PTFE-based grease 1. Lubricant and sealant must be selected such that they meet the temperature requirements. ERAA24194_02...
- Page 36 Types EZH and EZHSO Figure 22. Type EZH OS2 (Slam-Shut Version) Figure 23. Type EZH "X Body" R123...
- Page 37 Types EZH and EZHSO Figure 24. Type EZH Silencer Detail...
- Page 38 Types EZH and EZHSO Figure 25. Types PRX/120 and PRX/125 Pilots TYPE PRX/120-AP OR PRX/125-AP R106 R107 TYPE PRX/120 OR PRX/125 R108 R109 TYPE PRX/120 OR PRX/120-AP TYPE PRX/125 OR PRX/125-AP...
- Page 39 Types EZH and EZHSO Figure 26. Type SA/2 Assembly R110 R111 Figure 27. Type RPE Pilot Heater Figure 28. Check Valve...
- Page 40 Singapore 128461, Singapore T +1 800 558 5853 T +65 6777 8211 The Emerson logo is a trademark and service mark of Emerson +1 972 548 3574 Electric Co. All other marks are the property of their prospective owners. Middle East and Africa Fisher™...