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The NG304 series is specifically designed to prevent backflow (reverse flow) in applications of LNG fuel tanks and LNG facilities. These valves permit the safe refill operation of the LNG tanks and the maintenance process of the fill receptacle and ensure reliable performance at cryogenic temperatures.

Inlet Connection (mm) 36
Length (in.) 3.35
Length (mm) 85
Maximum Allowable Working Pressure (BARG) 69
Maximum Allowable Working Pressure (PSIG) 1000
Maximum Temperature Rating (°C) 74
Maximum Temperature Rating (°F) 165
Minimum Temperature Rating (°C) -196
Minimum Temperature Rating (°F) -320
Nominal Size (in.) 1/2"
Outlet Connection (in.) 1/2"
Outlet Connection (mm) 12.7
Weight (kg) 0.5
Weight Lbs. 1.1
Wrench Hex Flats (in.) 1.5
Wrench Hex Flats (mm) 38
Connection Type M36x2 Male x FNPT
Material Details Body: Brass| Bonnet: Brass| Seat: PTFE| Springs: Stainless Steel| Diaphragm Gasket_: PTFE| Backcap Gasket: Copper| Diaphragm: Bronze
Nominal Size (DN) 12.7
Product Type In-Line Check Valves
Product Warranty RegO 18 Month
Seat Material Type Soft
Silver Plated End Piece? Yes