Plast-O-Matic BSR Series balanced air-operated shut-off valves accurately control the flow of corrosive or high-purity liquids and gases by ensuring precise shut-off and preventing backflow, leakage and cross-contamination. These air-operated valves are used in chemical processing and water treatment systems. They feature double U-cup seals for leakproof connection, ensuring high sealing efficiency. These shutoff valves have a maximum inlet or outlet pressure of 150 PSI. They come with a non-sticking design, ensuring bubble-tight sealing performance. These balanced air-operated valves are equipped with an isolated spring design that prevents contact with the liquid, maintaining process purity and integrity. They have 1/4-20 mounting holes that offer easy installation in any position.