Betts Industries 4 in Straight Flanged Internal Air Emergency Valve, Aluminum, TTMA Flange Outlet

Betts internal air emergency valve meets HM183 requirements for an internal self-closing stop valve. The body is constructed of aluminum and incorporates a shear section that satisfies 49CFR178.345-8 tested per TTMA RP 84. The 1/8 in NPT air inlet is designed to shear and close the valve in the event of an under-ride accident. A fusible plug is installed to dump air pressure if temperatures exceed 212 °F. The valve uses Teflon® encapsulated seals for compatibility with a wide range of products, with other seal options also available. The internal air cylinder saves space on the exterior of the valve, providing maximum clearance for piping. The valve is equipped with a stainless steel jackscrew that allows for manual operation in the event of an air system failure. The maximum operating pressure is 35 psi with 80 psi line pressure and 45 psi with 100 psi line pressure. The valve MAWP is 35 psi (2.4 bar) and the minimum bursting pressure is 140 psi (9.7 bar). Optional screen 47074SL can be used with all 4 in internal air valves provided the tank is equipped with a sump with extended internal mounting sockets (SU27289AL or SU27289SS).Emergency Valve, Flanged Inlet, TTMA Flange Outlet, Internal Air, Aluminum, Teflon Seal, Burst Pressure Rating: 140 psi, 4 in Inlet, 4 in Outlet, 35 psi Pressure, Straight, Temperature Rating: 212 °F