The GDR Series Regulator provides reliable and precise pressure control in the most demanding applications. Optimized spring design with unique venturi design assures high flow with extremely low droop characteristics. Solid, non-tied diaphragm and all brass construction provides leak-free and long-lasting performance.
Fully balanced design virtually eliminates outlet pressure fluctuations due to inlet pressure variations. Available in spring reference or pilot operated configurations, with optional panel mount and pipe-a-way chamber. All GDR Series regulators are 100% factory tested and cleaned for oxygen service.
- Fully Balanced Design: Maintains constant delivery pressure regardless of inlet pressure fluctuations (<0.25 PSI per 100 PSI inlet variation)
- Optimized for High Flow: Unique Venturi Tube and optimized spring design allows for high flow rates with extremely low droop
- Wide Pressure Range: Inlet pressures up to 580 PSI, outlet pressures up to 450 PSI
- Solid, Non-Tied Diaphragm: Eliminates potential leak path and increases sensitivity
- Configurable: Various porting options, panel-mounted, Pipe-A-Way chamber, or pilot operated
- Oxygen Service Compatible: Designed and cleaned for O2 service standard
- PED Compliant: SEP Declaration available (2014/68/EU Art. 4, ¶ 3)
- 100% Factory Tested
- Max Inlet Pressure: 580 PSIG (40 bar)
- Outlet Pressure Ranges:
- Spring A – 0 to 55 PSIG (0 to 3.8 bar)
- Spring B – 50 to 135 PSIG (3.5 to 9.3 bar)
- Spring C – 125 to 225 PSIG (8.6 to 15.5 bar)
- Spring D – 225 to 450 PSIG (15.5 to 31 bar) — Series 500 only, rated at 450 PSIG @ 100°F
- Fail Open Flow Coefficients (Cv):
- 1/4" NPT & BSPT: 1.6
- 3/8" NPT: 2.4
- 1/2" NPT & BSPT: 2.9
- 3/4" & 1" NPT/BSPT: 5.8
- Regulator Balance: < 0.25 PSI per 100 PSI inlet pressure variation
- Pilot Operated — Series 500: Max Pilot 450 PSIG @ 100°F, Max Usable Cv 1.5, Ratio 1/0.95
- Pilot Operated — Series 1000: Max Pilot 250 PSIG @ 140°F, Max Usable Cv 2.7, Ratio 1/0.90
- Note: EP (EPDM) seals recommended for CO2 service
- A, B, and C Range Springs are interchangeable; D Range requires dedicated chamber
