Aluminum Tapered Seat Style
- Stainless Trim
- Teflon Encapsulated Seals
Air operated valves are provided with an external air cylinder to help prevent gasoline or other products from contaminating the air supply. The air cylinder is hard-coated aluminum with a polished stainless steel shaft. Cylinders have 1/8" NPT port for air connection and are supplied with a fusible plug installed.
3" and 4" Grooved and Flanged 90° and Straight Internal Air Operated Emergency Valves with 3" Air Cylinder.
Though higher priced, we strongly recommend Betts Emergency Valves with Viton-B seals, when available, instead of PTFE/Silicone (Tef-O-Sil) seals when used for standard petroleum products, all ethanol products, and all Bio-diesel products. Viton-B seals seldom fail during DOT testing and are not affected by tiny pieces of sediment like PTFE/Silicone (Tef-O-Sil) seals are prone to be.
Civacon's MaxAir™II 5 x 4 Air Operated Emergency Valve is an optimal choice for petroleum applications. The MaxAir™II series valves are uniquely engineered with no moving parts in the flow path for a superior flow rate.
The VA1050 and VA2050 3 Emergency Valves are specifically engineered to allow greater flexibility of tank truck design and assembly. The internal air operation cylinder allows maximum utilization of under tank chassis space while the "bellowed body" profile allows higher flow rates when unloading, and lower pressure drop when at the loading rack. The VA1050 and VA2050 are purposely designed for fuel oil, lube oil and heating oil delivery trucks.