Established more than 140 years ago, Pentair's Crosby brand has maintained its leadership in overpressure protection. The direct spring-operated safety and pressure-relief valves are among the world’s most widely used for oil and gas production and refining, petrochemical and chemical processing, and conventional and nuclear power. With the Crosby brand, Pentair maintains the industry’s most extensive high-flow facilities for valve testing in air, steam, and water.

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