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To prevent the product flow in the wrong direction which of the following valve is used?

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To prevent the product flow in the wrong direction which of the following valve is used?

(a) Seat valve

(b) Butterfly valve

(c) Seat valve and butterfly valve

(d) Check valve

I got this question during an internship interview.

My query is from Pipes, Valves and Fittings topic in chapter Building Blocks of Dairy Processing of Dairy Engineering

1 Answer

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Best answer
Right option is (d) Check valve

The explanation: A check valve is fitted when it is necessary to prevent the product from flowing in the wrong direction. The valve is kept open by the liquid flow in the correct direction. If the flow stops, the valve plug is forced against its seat by the spring. The valve then closes against reversal of the flow.

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