NEE Propane & Natural Gas Equipment Catalogue

NATIONAL TOLL FREE DIRECTORY 1-866-574-5100 | ON THE WEB PUMPS, COMPRESSORS & MOTORS DIAPHRAGM RELIEF, BACK PRESSURE & BYPASS VALVES Fisher Relief Valves for Liquid Service Type 98H is a self-operated relief valve for use on relief and back pressure applications for liquid propane applications involving large LP-Gas pumping systems and vaporizers. Internal pressure registration eliminates the need for a control line. NEE # Body Size Relief Valve Range Relief Valve Setting 98H-13 1/2” 25-75 PSIG 50 PSIG 98H-14 70-140 PSIG 100 PSIG 98H-22 3/4” 98H-29 1” 25-75 PSIG 50 PSIG 98H-30 70-140 PSIG 100 PSIG Fisher Low Pressure Relief Valves Type 1805 relief valve is designed for installation between the first and second stage regulators or in the downstream line from a high pressure regulator used for a final stage service. Available in 1” or 2” valve bodies. Type 298H relief valve is designed for installation downstream of a large second stage regulator. The larger diaphragm in this relief valve provides extremely sensitive operation. NEE # Body Size Relief Valve Range Relief Valve Setting 289H-41 1” F NPT 1-4.5 PSIG 3 PSIG 289H-42 4-15 PSIG 10 PSIG 289H-43 10-20 PSIG 15 PSIG 1805-19P 10-60 PSIG 30 PSIG 289L-21 12-40 WC - 289H-49 20-50 PSIG 30 PSIG 289H-4 2” F NPT 4-10 PSIG 6 PSIG 1805-51P 5-35 PSIG 20 PSIG 289H-2 1/2 - 2 1/4 PSIG 25 PSIG 1805-52P 10-50 PSIG 30 PSIG Fisher Back Pressure Valves These valves are soft seated, holding a differential back pressure on liquid meters. Type N120 is installed after the meter, and it holds a back pressure on the meter until vapour is forced back to the tank through the vapour eliminator. In this way vapour cannot form within the meter during liquid delivery. Intended for smaller pumps, N120s are ideal on such applications as cylinder filling installations. All units have a 1/4” F NPT tapped and plugged boss on the inlet side of body and can be used for both LP-Gas and NH3 service. The N120 has a 1/4” F NPT connection in the closing cap for attachment of an external sensing line from the tank vapour space or vapour eliminator. NEE # Liquid Meter Size Body Size Differential Setting Differential Range N120-06-3 3/4” or 1” 3/4” F NPT 12 PSID 10-20 PSID N120-08-3 1” F NPT 1805 Series 289H-2