Gate valves are rather simple valves that should be used as only open/close valves. Media such as steam going through the gate of the valve not fully open will cause a restriction through the valve thus increasing the velocity of the steam going through the valve which will eventually cut through the valve’s “gate” and render the valve useless.
Gate valves are classified as a rising stem or a non-rising stem valve. A rising stem gate valve will give the plant operator visual reference if the valve is open or closed.
Gate valves generally are threaded or flanged and are manufactured in bronze, stainless, iron, and a variety of other metals and pressure ratings.
As with any mechanical valve, careful consideration of application should be exercised on selecting the proper valve.
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