Fisher™ N120 Series Backpressure Valve
N120 Series backpressure valve is installed after the meter, and it holds backpressure on the meter until vapor is forced back to the tank through the vapor eliminator. In this way vapor cannot form within the meter during liquid delivery. Intended for smaller pumps, N120 Series are ideal on such applications as cylinder filling installations. All units have a 1/4-inch FNPT tapped and plugged boss on the inlet side of body and can be used for both LP-Gas and Anhydrous Ammonia (NH3) service.
FeaturesDesigned for Use with Propane, Butane, and Anhydrous Ammonia at Ambient TemperaturesIdeal for Cylinder Filling InstallationSpecificationsBody Sizes and End Connection Styles (inlet x outlet)Type N120-06-3: 3/4-inch FNPT
Type N120-08-3: 1-inch FNPTDifferential Pressure Setting12 psid / 0,83 barDifferential Pressure Range10 to 20 psid / 0,69 to 1,4 barMaximum Inlet Pressure400 psig / 27.6 bar WOGTemperature Capabilities-20 to 140°F / -29 to 60°C
