Keystone 990 & 920 Butterfly Valves
The Keystone 990 (wafer) and Keystone 920 (lug) are thin disc resilient seated Butterfly Valves.
The Keystone 990 (wafer) and Keystone 920 (lug) are thin disc resilient seated Butterfly Valves. The Keystone 990 and 920 are used when sanitary service and corrosion resistance is required.
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