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Keystone butterfly valves are recognized as a world leader in industrial process valves through their strong reputation for reliability, quality and service. Their product line includes resilient seated butterfly valves, high performance butterfly valves and double-flanged butterfly valves.

Keystone butterfly valves are recognized as a world leader in industrial process valves through their strong reputation for reliability, quality and service. Their product line includes resilient seated butterfly valves, high performance butterfly valves and double-flanged butterfly valves.