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Instruction Manual
Instruction Manual
D103682X012
June 2018
Type EZR Pilot-Operated Regulator
SummaRy
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InTROducTIOn
Scope of manual
This manual provides installation, startup, maintenance and
spare parts ordering information for the Type EZR pressure
reducing regulator, PRX Series pilots and Type FU filter.
Product description
The Type EZR is a pilot-operated regulator used in
transmission and distribution networks or pipe lines
supplying industries and commercial businesses.
The Type EZR can be equipped with a slam shut Type OS2
(Type EZR body change) which permits the gas flow to be cut
off rapidly and totally in the case of under or over outlet
regulator pressure.
The Type EZR consists of:
a version without integral slam shut:
• A body («E body» type), a bonnet
• A regulation subassembly consisting of a slotted cage and
a diaphragm/plug
• An inlet strainer
• A pilot assembly consisting of a FU filter (filtration
5 microns) and a pilot set to the required outlet pressure
a version with integral slam shut:
• A body («X body» type), a bonnet, a connecting part
• A regulation subassembly consisting of a slotted cage and
a diaphragm/plug
Figure 1. Type EZR with Type OS2 Slam-Shut Valve
TyPE PRX-120
Figure 2. PRX Series Pressure Reducing Pilots
• A pilot assembly consisting of a FU filter (filtration 5 microns)
and a pilot adjusted to the required outlet pressure
• A removable slam shut seat
• A integral O-ring tightshut valve/bypass assembly
• A release relay Type OS2 according to NTAOS2:
- a mechanism box (BM)
- a safety manometric box (BMS) to be connected outlet
side of the regulator
The Type EZR is in conformity with the
Pressure Equipment Directive PED 2014/68/EU
and is classified in category IV.
Type EZR
TyPE PRX-120/aP
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Table of Contents
Related Manuals for Fisher EZR
Summary of Contents for Fisher EZR
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Page 1: Table Of Contents
The Type EZR is a pilot-operated regulator used in transmission and distribution networks or pipe lines supplying industries and commercial businesses. The Type EZR can be equipped with a slam shut Type OS2 (Type EZR body change) which permits the gas flow to be cut TyPE PRX-120... -
Page 2: Characteristics
The Type EZR pressure reducing regulator can be equiped • Type PRX/125: with a PRX Series pilot mounted on the Type EZR main valve Identical to the Type PRX/120 except the restriction screw for pressure reducing or wide-open monitoring applications. - Page 3 Type EZR material connections Regulator Inlet / Outlet: ISO PN 100 B (ANSI 600 RF) Body Steel ISO PN 50 B (ANSI 300 RF) Bonnet Steel ISO PN 20 B (ANSI 150 RF) Slotted disc Stainless steel Other possibilities exist (contact factory)
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Page 4: Labelling
Depending on BMS configuration Pumax 18.6 72.4 18.6 72.4 E04A Figure 3. Label for Type EZR Regulator with Type OS2 Slam Shut 20B1 50B1 100B2 16B 25B 40B Other configurations available DN 25 50 80 100 150 REGULATEUR/ REGULATOR EN 334... -
Page 5: Dimensions And Weights
Type EZR dImEnSIOnS and WEIghTS 223 MAX 223 MAX Disassembly 25 B14A Figure 5. Type EZR Dimensions with Slam Shut 223 MAX Disassembly 25 223 MAX B14B Figure 6. Type EZR Dimensions without Slam Shut... - Page 6 Type EZR Table 4. Regulator Dimensions with Slam Shut (mm) BOdy dn B15B Table 5. Regulator Weight with Slam Shut (kg) BOdy dn Pn 20 Pn 50 Pn 100 B16B Table 6. BMS (Safety Manometric Box) Dimensions (mm) TyPE Diaphragm...
- Page 7 Type EZR Table 7. Dimensions without Slam Shut (mm) BOdy dn B15A Table 8. Regulator Weight without Slam Shut (kg) BOdy dn Pn 20 Pn 50 Pn 100 B16A Table 9. Body Dimensions with/without Slam Shut (mm) BOdy, 193.5 193.5 193.5...
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Page 8: Principle Of Operation
Type EZR PRIncIPLE OF OPERaTIOn B18A Figure 7. Type EZR E Body with Type PRX Pilot Regulator The EZR is a pilot-driven, diaphragm/plug regulator. • closing Tight shutoff is achieved by the diaphragm/plug pushing As the flow decreases, the Pd increases outlet side against the slotted cage, the force of the closing spring and of the regulator. - Page 9 Type EZR B18B Figure 8. Type EZR X Body with Integral Type OS2 Slam Shut and Type PRX Pilot Slam Shut The pressure of the zone to be protected (generally the The gas flow is obstructed until the fault has been corrected pipeline on the outlet side of the regulator and after the slam and the mechanism box manually rearmed.
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Page 10: Installation
Block Valve Pilot Exhaust Supply Pressure Line Type PRX Pilot B19A Control Line Figure 9. Type EZR Single Installation with Type PRX Pilot and Separate Pilot Exhaust Line Upstream Regulator Downstream Regulator Block Valve Block Valve Type Supply Pressure Line... -
Page 11: Startup And Adjustment
Type EZR a regulator may vent some gas to the WaRnIng atmosphere. In hazardous or flammable gas service, vented gas may accumulate and Personal injury or equipment damage, due cause personal injury, death or property to bursting of pressure-containing parts may damage due to fire or explosion. result if this regulator is over-pressured or... -
Page 12: Maintenance
Type EZR Verify the absence of pressure between inlet and • Type PRX Pilot (a) outlet valves - Adjust setting to outlet pressure required • Outlet valve • Slam shut valve plug - Open slowly - Closed • Servicing valve •... - Page 13 Note: Counterclockwise adjustment of the Type PRX restrictor screw will increase proportional band. Adjustment of the restrictor screw will also cause a shift in set point. Setpoint should be checked and adjusted following restrictor screw adjustment. Figure 12. Type EZR Startup Schematic...
- Page 14 Type EZR disassembly Reassembly • Perform the above operations in reverse order (respect Recommended frequency: tightening torques) Every 2 to 6 years (or less depending on operating conditions) • Replace the O-rings and diaphragm at each disassembly Verification: Slam Shut Reassembly...
- Page 15 Type EZR Table 13. Troubleshooting for Type EZR Regulator SymPTOmS cauSE acTIOnS Control the regulator valve plug Control the regulator seat If outlet pressure is increases Internal leak Control the pilot or contact after-sales Locate and repair leak If inlet pressure decreases...
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Page 16: Spare Parts
Type EZR SPaRE PaRTS Table 14. Type EZR Main Valve Spare Parts dn 25 dn 50 dn 80 dn 100 dn 150 Regulator Type description key n° 197428 197429 197431 197432 197434 O-ring (Nitrile) 1H2926X0032 1D191706992 1D191706992 O-ring 8/11 400055... - Page 17 Locknut O-ring O-ring O-ring Segment O-ring O-ring Spring carrier plate Bypass assembly Spring Spring cover Type EZR X and E Body (Figure 15 and 16) Spring carrier plate Screw Washer description Filter Diaphragm plate O-ring Diaphragm O-ring Diaphragm plate O-ring...
- Page 18 Type EZR Figure 15. Type EZR E Body Figure 14. Type EZR X Body with OS2 Slam Shut Figure 16. Type EZR X Body...
- Page 19 Type EZR R107 Type PRX/120-aP or PRX/125-aP R106 Type PRX/120 or PRX/125 R108 R109 S - SuPPLy PORT B - BLEEd PORT L - LOadIng PORT a - SEnSIng PORT d - damPER R - RESTRIcTOR Type PRX/120 or PRX/120-aP Type PRX/125 or PRX/125-aP Figure 17.
- Page 20 T +1 800 558 5853 T +65 6777 8211 Electric Co. All other marks are the property of their prospective owners. Fisher™ is a mark owned by Fisher Controls International LLC, a +1 972 548 3574 business of Emerson Automation Solutions.