Keystone is a pioneer of the butterfly valve. Since 1951 Keystone has been manufacturing and developing butterfly valve styles designed to suit multiple applications and industries. 

The Keystone brand is a recognized leader in butterfly valves and industrial process valves.

With a strong reputation for reliability and quality, Keystone valves include resilient seated and high performance butterfly valves, are versatile and are available in various designs, configurations, and materials to match all specifications in marine, water, oil, gas, process, and other industries.

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