What is the function of the pump primer valve?

What is the function of the pump primer valve?

• A. It controls discharge pressure.
• B. It enables introducing water into the pump to prime the suction.
• C. It seals the suction line.
• D. It measures pump temperature.

Answer: (B)

Priming a pump is about getting the pump and its suction line filled with water so the pump can develop suction. When a pump draws from a source that may contain air, the suction line can be full of air and the pump won’t be able to pull water. The primer valve is opened to introduce water into the pump casing, pushing air out of the suction line until the pump is flooded. Once primed, the valve is closed and the pump can be started to draw water efficiently and maintain the desired discharge pressure. This valve isn’t used to control discharge pressure, seal the suction line, or measure temperature.

Priming a pump is about getting the pump and its suction line filled with water so the pump can develop suction. When a pump draws from a source that may contain air, the suction line can be full of air and the pump won’t be able to pull water. The primer valve is opened to introduce water into the pump casing, pushing air out of the suction line until the pump is flooded. Once primed, the valve is closed and the pump can be started to draw water efficiently and maintain the desired discharge pressure. This valve isn’t used to control discharge pressure, seal the suction line, or measure temperature.