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Pressure Relief Valve Testing and Repair

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Pressure Relief Valve Testing and Repair

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Questions and Answers

What is the purpose of a try lever test for pressure relief valves?

To check for leaks in the valve

To determine the pressure at which the valve opens

To determine if a pressure relief valve is operating freely (correct)

To assess the valve's compatibility with different types of boilers

How often should a try lever test be performed on power boilers operating below 2760 kPa?

Annually

Monthly

Every three months

Every six months (correct)

What is the minimum required pressure for performing a try lever test on a steam heating boiler?

45 kPa

35 kPa (correct)

55 kPa

25 kPa

When should try lever tests be conducted?

Before conducting pop tests and accumulation tests Signup and view all the answers

What is the minimum required pressure for performing a try lever test on a power boiler?

75% of the setting of the safety valve Signup and view all the answers

If a pressure relief valve simmers after a try lever test, what does it indicate?

The valve may have leaks Signup and view all the answers

What is the purpose of the pop test for a safety valve?

To measure the pressure at which the safety valve opens and closes Signup and view all the answers

When should a pop test be performed on a boiler?

Annually Signup and view all the answers

Who is qualified to adjust or repair pressure relief valves as per ASME BPVC?

Valve manufacturers or their authorized repair representative Signup and view all the answers

What should be done if a safety valve continues to simmer after operating the try lever?

It must be repaired or replaced Signup and view all the answers

Why is it important to perform a pop test before taking a boiler off-line for maintenance?

To identify any defective valves for replacement or repair Signup and view all the answers

What should be done after accurately recording the opening and reseating pressures in a pop test?

Compare the opening pressure and blowdown to established tolerances Signup and view all the answers