Fisher R622-DFF LPG Gas Second Stage Low Pressure Regulator
Brand: Fisher
Model: R622-DFFHOT
Connection Size: 3/4 in. FNPT x 3/4 in. FNPT
Inlet Pressure: 50 psig (3.4 bar)
Max Outlet Pressure: 2 psi (0.14 bar)
Outlet Pressure Range: 9–20 in. w.c. (22–50 mbar)
Outlet Pressure Setting: 11 in. w.c. (27 mbar)
Flow Rate: 32 kg/h
Pressure Tap Method: Internal sensing
Temperature Range: -29°C to 71°C
Media: LPG, natural gas, air

Fisher R622-DFF Second Stage Low Pressure Regulators
The R622-DFF regulators are designed to deliver low pressure, measured in inches of water column, and are typically set at 11 in. w.c. (27 mbar). They feature a high-capacity internal relief valve construction. The regulators are usually painted Palm Green. Variants differ in construction and capacity ratings.
Key Features:
- High measurement accuracy
- Excellent pressure relief performance
- Corrosion-resistant materials
- Inlet filter screen
- Pressure tap ports for inlet and outlet pressure gauges, facilitating system maintenance
- Forward drainage design
- Recommended replacement life of 20 years
- UL certified
Model: R622-DFF
Connection Size: 3/4 in. FNPT x 3/4 in. FNPT
Inlet Pressure: 50 psig (3.4 bar)
Max Outlet Pressure: 2 psi (0.14 bar)
Outlet Pressure Range: 9–20 in. w.c. (22–50 mbar)
Outlet Pressure Setting: 11 in. w.c. (27 mbar)
Flow Rate: 32 kg/h
Pressure Tap Method: Internal sensing
Temperature Range: -29°C to 71°C
Media: LPG, natural gas, air
| Brand |
Fisher |
|---|




