Emerson Fisher's N100 Series is designed for bypass on 2 to 4 in. size pumps, the N100 Series is widely used on both LPG and Anhydrous Ammonia (NH₃) applications. The throttling action of the N100 series allows only surplus pump discharge to be returned to the tank. A venturi flow passage gives a boost effect, permitting a greater valve opening for increased flow at the lower pressure build-ups when bypassing full pump output. These features help to give rapid, stable liquid transfer and reduce dangerous pressure pulsations. The valves contain only one moving part- the piston style inner valve.
An external sensing line is not required because tank pressure registers through a hole in the inner valve. Complete field servicing can be made without removing the valve from the piping.
Note: All N100 Series bodies have 1/4 in. FNPT tapped and plugged boss on the side inlet for either a pressure gauge or a hydrostatic relief valve and have a temperature rating of -20 to 160°F (-29 to 71°C)
- Closing Cap
- Pressure Sensing Orifice
- Piston Inner Valve
- Exclusive Venturi Passage
- UL Listed (4 in. Sizes are not UL Listed)
- Pump Size: 2 in.
- Body Size: 1 in. FNPT
- PSID Setting: 115 psig (7.9 bar)
- PSID Range: 50 to 150 psig (3.4 to 10.3 bar)
- Maximum Inlet Pressure: 400 psig (27.6 bar)
- Temperature Capabilities: -20 to 160°F (-29 to 71°C)
Instruction Manual (PDF Download)
Replacement Parts Sheet (PDF Download)
N100 Series Bypass Valve Schematic (PDF Download)