This 1?” Sch 80 PVC Pneumatic Ball Valve, EPDM, Single Acting, (FNPT x FNPT) 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. a male adaptor, threaded pipe or pipe nipple connects to this part. Sch 80 PVC is robust and durable, perfect for commercial and industrial applications. EPDM seals provide effective sealing with resistances to several chemicals over a wide range of temperatures. We buy at the lowest prices so we can pass the savings onto you.