a gate valve is a valve that allows flow in only one direction
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Knife Gate Valves (KGVs) were introduced to the world to be used in the pulp and paper industry in 1927. When the market demanded a low-cost valve for pulp stock operations, the specialized knife gate valve design was born. Knife gate valves have been used all over the world since then, with several variations; the Push-Through Knife Gate was introduced in the United States, whereas the Guided Shear Gate was designed in Switzerland. While we’ve adopted the word “knife gate” as a general term for each version of this valve, you might be surprised to learn that only the Guided-Shear Gate and its higher-caliber variant, can really “cut” through media like a knife.
In this article, we will describe, understand how the Knife Gate Valve works, distinguish with gate valve, and explain its strengths and limitations.