Closed Loop System: Understanding Pump Pressure Measurements

What are the pressure readings in a closed loop system with a pump attached?

Given static pressure: 26 psig
Pump head: 83 feet

Answer:

In a closed loop system, with the given static pressure and pump head, the discharge pressure gauge after the pump running will read 61.939 psig, while the suction pressure gauge will read the static pressure, which is 26 psig.

Understanding pressure readings in a closed loop system with a pump attached is essential for maintaining optimal performance and efficiency. In this scenario, the static pressure and pump head play crucial roles in determining the discharge and suction pressures.

Firstly, it's important to convert the pump head, given in feet, to pressure. The standard conversion factor for feet of water to psi is 0.433. In this case, the pump head of 83 feet would convert to 35.939 psi.

Before the pump runs, the system pressure at the suction side is 26 psig. When the pump is operational, it adds the pump head (converted to pressure) to the system. Therefore, the discharge pressure gauge after the pump would show a reading of 26 psig (static pressure) + 35.939 psi (pump pressure) = 61.939 psig.

On the suction side of the pump, the pump head doesn't contribute to the system pressure. Thus, the suction pressure gauge will simply show the static pressure, which is 26 psig.

By understanding these pressure readings, operators can effectively monitor the performance of the pump in the closed loop system and troubleshoot any potential issues that may arise.