Valves interview questions and answers

 

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1. What are the steps in selection of valve?

What to handle, liquid, gas or powder, fluid nature, function, construction material, disc type, stem type, how to operate, bonnet type, body ends, delivery time, cost, warranty.

2. What are functions of valves?

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Isolation, regulation, non-return and special purposes.

3. What are isolating valves?

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Gate, ball, plug, piston, diaphragm, butterfly, pinch.

4. What are regulation valves?

Globe, needle, butterfly, diaphragm, piston, pinch.

5. What are non-return valves?

check valve

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