The piston intake pressure relief valves on the apparatus are set at _____ psi; above this pressure will activate the intake pressure relief valve and prevent damage to the intake plumbing on the apparatus

The piston intake pressure relief valves on the apparatus are set at _____ psi; above this pressure will activate the intake pressure relief valve and prevent damage to the intake plumbing on the apparatus

• A. 100 psi
• B. 200 psi
• C. 250 psi
• D. 150 psi

Answer: (D)

Intake pressure relief valves exist to protect the suction side of the pump when drafting or under conditions that push suction pressure higher than what the piping can safely handle. They are set to open at a specific psi so that, if the intake pressure climbs to that point, the valve relieves the excess pressure and prevents stress, cavitation, or damage to the intake plumbing and pump components. The piston intake relief valves on this apparatus are set at 150 psi; above this pressure, the valve opens to prevent damage. In normal operation, suction pressure stays well below this setting, so the relief remains closed during proper priming and drafting. A lower setting like 100 psi would cause frequent venting during normal surges, while higher settings such as 200 or 250 psi would allow higher, potentially unsafe pressures before relief occurs.

Intake pressure relief valves exist to protect the suction side of the pump when drafting or under conditions that push suction pressure higher than what the piping can safely handle. They are set to open at a specific psi so that, if the intake pressure climbs to that point, the valve relieves the excess pressure and prevents stress, cavitation, or damage to the intake plumbing and pump components. The piston intake relief valves on this apparatus are set at 150 psi; above this pressure, the valve opens to prevent damage. In normal operation, suction pressure stays well below this setting, so the relief remains closed during proper priming and drafting. A lower setting like 100 psi would cause frequent venting during normal surges, while higher settings such as 200 or 250 psi would allow higher, potentially unsafe pressures before relief occurs.