Bonney Forge Corporation, a leading international manufacturer of industrial forged steel valves, cast steel valves, forged steel fittings, unions and branch connections, is 40 years ahead of the phosphate-coating requirements the ASTM only recently issued in its updated 2014 version of A961.
Gate valves are primarily designed for on-off services when a straight-line flow of fluid and minimum restriction is desired. The closure member of gate valves either stops or allows flow through the valve and acts somewhat like the opening or closing of a gate and is called, appropriately, the gate valve.
The gate is also shown as a wedge, due to the shape is resembles.
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