How to Prime a Vertical Turbine Fire Pump Properly?

Proper priming of a vertical turbine fire pump is crucial to ensure reliable performance when an emergency strikes. An unprimed or improperly primed pump can lead to equipment failure, costly repairs, and, most importantly, compromised fire safety. As a trusted fire pump manufacturer, we explain here the correct steps to prime your vertical turbine fire pump properly.

Why Priming Is Important

A vertical turbine fire pump relies on a continuous water supply to operate correctly. Priming ensures that the pump casing and suction pipe are filled with water, eliminating air pockets that could cause the pump to run dry, lose suction, or overheat.

Step-by-Step Guide to Priming a Vertical Turbine Fire Pump

1. Check the Water Source

Before starting, verify that the water source (usually a reservoir, tank, or well) is at the correct level and unobstructed. Ensure the pump’s suction bell is submerged to prevent air intake.

2. Inspect Valves and Piping

All suction and discharge valves must be inspected and properly positioned. The suction valve should be fully open to allow water to flood the pump casing naturally.

3. Verify System Integrity

Check for leaks in suction piping, gaskets, and seals. Air leaks can prevent proper priming and impact pump performance.

4. Use a Priming Line if Necessary

Some vertical turbine pumps are equipped with a priming line or external priming system. Open the priming valve slowly to fill the pump casing with water until air bubbles stop emerging from the air release valves.

5. Open the Air Release Valve

Air trapped in the pump casing must be released. Open the air release valve until a steady stream of water flows, indicating that the pump is fully primed.

6. Monitor Suction Pressure

Observe the suction gauge. A stable positive suction pressure confirms that the pump is primed and ready for operation.

7. Conduct a Test Run

Start the pump briefly and monitor its behavior. Smooth, steady operation without vibration or unusual noise confirms successful priming.

Tips for Successful Priming

• Routine Maintenance: Regularly inspect your vertical turbine fire pump for wear and tear.

• Proper Installation: Always ensure the pump is installed according to NFPA 20 standards.

• Trained Personnel: Only qualified technicians should perform priming and maintenance operations.

Common Mistakes to Avoid

• Priming with low water levels

• Ignoring air leaks in suction piping

• Starting the pump before confirming full priming