Gas Delivery Regulator (GDR)
4Pages

GAS DELIVERY REGULATOR 1/4" - 1" NPT, BSPT Spring Reference & Pilot Operated PILOT OPERATED (DOME LOADED) STANDARD CONFIGURATION PIPE-A-WAY CHAMBER PANEL MOUNTED Description The GDR Series Regulator provides reliable, precise pressure control in the most demanding applications. Optimized Venturi and spring design assures high flow with extremely low droop characteristics. Solid non-tied diaphragm and all brass construction guarantees leak free long lasting performance. Fully balanced design virtually eliminates outlet pressure fluctuations due to inlet pressure variations. All GDR Series regulators are 100% factory tested. Fully Balanced Design maintains a constant delivery pressure regardless of inlet pressure fluctuations Fully Supported, Solid Non-Tied Diaphragm for long leak free service life Flow Rates to 20,000 SCFH Optimized Spring Design and Unique Venturi Tube allows for high flow rates with minimal pressure droop effect Pilot Operated (dome loaded) Configuration maintains virtually constant outlet pressures Vent Chamber to Stack with Pipe-aWay Option Side Venting Chamber option prevents moisture accumulation when mounted horizontally Cleaned and Packaged for Oxygen Service Note: Regulators supplied with Nitrile Seals are not Cleaned and Packaged for Oxygen Service. Forged Brass Body and Spring Chamber ASTM 377 Brass Adjustment Screw, Valve, Valve Stem, Spring Button, Spring Retainer and Venturi Tube ASTM B16 303 Stainless Steel Chamber Insert ASTM A276 Color Coded, Chrome Vanadium Adjustment Springs ASTM A-231 302 Stainless Steel Valve Spring ASTM A-313 GLT Fluoroelastomer (FKM), EPDM, or Nitrile on Nylon Diaphragm GLT Fluoroelastomer (FKM), EPDM, or Nitrile Seats and Seals Stainless Steel Trim (Flange Screws and Lock Nut) Note: EPDM seals recommended for CO2 service. Nitrile Seals recommended for NG service.

PANEL MOUNT (OPTION P) D – SPRING 550 Psig Inlet Outlet Pressure, Psig Note: Dotted lines indicate 10% Droop C – SPRING 300 Psig Inlet 150 B – SPRING 200 Psig Inlet A – SPRING 150 Psig Inlet 0 Flow, SCFH (Nitrogen) Technical Data (GDR-500) Maximum Inlet Pressure: 550 Psig (37.9 Bar) Effect of Inlet Pressure Variation: < 0.25 Psig/100 Psig Pressure Ranges Spring Model Code Outlet Pressure Range Fail Open Flow Coefficient 225 - 450 Psig (15.5 - 31.0 Bar) Notes: A, B and C Range Springs are interchangeable D Range spring utilizes dedicated Chamber, Chamber Ring and Spring Retainer Page 2 of 4...

Outlet Pressure, Psig C – SPRING 300 Psig Inlet Note: Dotted lines indicate 10% Droop B – SPRING 200 Psig Inlet A – SPRING 150 Psig Inlet 25 7,500 10,000 12,500 Flow, SCFH (Nitrogen) Flow SCFH Nitrogen Maximum Inlet Pressure: 400 Psig (27.6 Bar) Effect of Inlet Pressure Variation: < 0.25 Psig/100 Psig Fail Open Flow Coefficient (3/4 and 1"): 5.8 Cv Pressure Ranges Spring Model Code A (Black) B (Red) C (Blue) Notes: A, B and C Range Springs are interchangeable

Maximum Pilot Pressure: 450 Psig (31.0 Bar) Maximum Usable Cv: 1.5 Pilot Pressure to Outlet Pressure Ratio: 1 : 0.95 (100 Psig Pilot Pressure = 95 Psig Outlet Pressure) Maximum Pilot Pressure: 350 Psig (24.1 Bar) Maximum Usable Cv: 2.7 Pilot Pressure to Outlet Pressure Ratio: 1 : 0.90 (100 Psig Pilot Pressure = 90 Psig Outlet Pressure) Pilot Operated Regulators fail closed on loss of pilot pressure. Regulators fail open on loss of outlet pressure when pilot pressure is present. Repair Kits Includes: Valve Stem, Diaphragm, Valve Assembly, Valve Spring and Bottom Plug O-Ring 4GDR – 750B - V -...