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Can a Knife Gate Valve be used in combination with drinking water?

April 26, 2017combination drinking water Gate Knife Used valve

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Can a Knife Gate Valve be used in combination with drinking water?

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The VAG ZETA® Knife Gate Valve should not be used in combination with drinking water for the following reasons: • The gasket’s wastewater-specific NBR elastomer composition has neither KTW nor W270 accreditation and may therefore not be used in combination with drinking water. • Because Knife Gate Valves are used with wastewater, they must be lubricated around the door and the guide at every maintenance interval. The large amount of grease that is applied facilitates the deposit of coliform bacteria, which is why it is not recommended to use the valve in combination with drinking water. • When the valve is open, the door is pulled out of the housing and exposes the valve to the environment. When the valve is shut, impurities can enter the valve and pollute the drinking water.