This 1?” Sch 80 PVC Pneumatic Ball Valve, VITON, Single Acting, (SOC x SOC) is a true union ball valve with a pneumatic actuator on top for automatic control when compressed air is applied. the penumatic actuator opens when compressed air is applied to it but closes due to internal springs. Socket connections are joined to pipe of the same diameter with solvent welding. Sch 80 PVC is robust and durable, perfect for commercial and industrial applications. VITON seals provide increased temperature resistance than EPDM seals and recommended for exposure to oils, gasoline and aggressive chemicals. We buy at the lowest prices so we can pass the savings onto you.