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Pumps and pipes: When to use a knife gate valve

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article image Valves should be selected based on the media used in the application

Making a choice between knife gate valves and butterfly valves for a specific application can be difficult.

Given their respective characteristics, valves should be selected based on the media used in the application. How the valve will be used in the application should also be considered. 

Both knife gate valves and butterfly valves are available in manual operation (hand wheel, gear box or lever) as well as with actuators (pneumatic or electric).

Factors to consider before making the selection include checking if the media is abrasive; whether there will be large suspended solids; and the likelihood of the presence of solid material in the line when closing. If the answer to any of the above is a ‘Yes’, a knife gate valve is recommended for the application.

Typical applications for knife gate valves include sewerage and effluent; vacuum trucks; fluid transfer trucks; slurries; and grain silos.

Process Systems supplies solenoid, actuated ball and butterfly valves for air, vacuum, fluid, chemical and steam applications.

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