Sliding Pneumatic Valve, Steel, 4 in Threaded Pipe x ANSI Flange, Air Open/Spring Close

The Betts pneumatic sliding valve is an external self-closing stop valve designed without a shear section. It requires the cargo tank to provide suitable protection as specified in 49 CFR 178.345-8. The valve operates with an air-open, spring-close cylinder requiring 90 psi line pressure to fully open. PTFE encapsulated O-rings ensure a positive seal for pressure or vacuum service, while standard 316 stainless steel discs offer premium corrosion resistance. The adjustable packing nut with woven PTFE-infused packing allows easy stem adjustments. The air cylinder has a maximum working temperature of 250 °F (121 °C). A fusible plug set to melt above 212 °F (100 °C) is installed in the air cylinder to release air pressure in case of fire.Sliding Valve, Air Cylinder Actuated Handle, Threaded Pipe Inlet, ANSI Flange Outlet, Pneumatic, Steel, PTFE Seal, 316 Stainless Steel Stem, 4 in Inlet, 4 in Outlet, 90 psi Pressure Rating, 49 CFR 178.345-8 Standards, 250 °F Temperature Rating, 6.07 in Width