This 1″ Sch 80 PVC Pneumatic Ball Valve, VITON, Single Acting, (SOC 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. One side connects to a pipe using solvent welding and the other has female threads. 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. Petram PVC has all the schedule 80 PVC and CPVC fittings and valves you need for your project.