This 3″ Sch 80 PVC Pneumatic Ball Valve, VITON, Double 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 pneumatic actuator opens and closes when compressed air is applied to the respective ports. 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. Our prices are a fraction of what you pay at your local plumbing store, order from Petram PVC Supply for quick shipping.