fire fighting pump failure detection

Most firefighting water provided by firefighting water sources needs to be pressurized by fire fighting pumps to meet the requirements for water pressure and water volume during firefighting. Failure due to improper installation and maintenance of the water pump will inevitably affect fire fighting and rescue and cause unnecessary losses.During the maintenance of fire fighting pumps, the diagnosis of fire fighting pump faults is a key link. The following are several common faults and their elimination measures for everyone to diagnose fire fighting pump faults.

This article contains the following:

• No liquid supply, insufficient liquid supply or insufficient pressure

• The fire fighting pump will stop after a while

• The power consumption of the fire fighting pump is too large

No liquid supply, insufficient liquid supply or insufficient pressure

1) The pump is not filled with water or properly vented

Remedy: Check that the pump casing and inlet line are completely filled with liquid.

2) The speed is too low

Remedy: Check whether the wiring of the motor is correct, the voltage is normal or the steam pressure of the turbine is normal.

3) The system head is too high

Elimination measures: Check the head of the system (especially friction loss).

4) Suction lift is too high

Elimination measures: check the existing net head

5) Impeller or pipeline blocked

Elimination measures: Check for obstacles.

6) The direction of rotation is wrong

Remedy: Check the direction of rotation.

7) Air is generated or there is leakage in the inlet pipeline

Elimination measures: Check the inlet pipeline for cavitation and / or air leakage.

8) The packing or seal in the stuffing box is worn, causing air to leak into the pump casing

Elimination measures: Check the packing or seal and replace as necessary, check whether the lubrication is normal.

9) Insufficient suction head when pumping hot or volatile liquids

Elimination measures: increase the suction head, consult the manufacturer.

10) The bottom valve is too small

Elimination measures: Install the correct size foot valve.

11) The immersion depth of the bottom valve or inlet pipe is not enough

Elimination measures: Consult factory for correct immersion depth. Use baffles to eliminate eddy currents.

12) The impeller clearance is too large

Elimination measures: Check whether the gap is correct.

13) Impeller damaged

Elimination measures: Check the impeller and replace it as required.

14) The impeller diameter is too small

Elimination measures: Consult factory for correct impeller diameter.

15) The position of the pressure gauge is incorrect

Elimination measures: Check the correct position, check the outlet nozzle or pipeline.

The fire fighting pump will stop after a while

1) The suction stroke is too high

Elimination measures: check the existing net head

2) Impeller or pipeline blocked

Elimination measures: Check for obstacles.

3) Air is generated or there is leakage in the inlet pipeline

Elimination measures: Check the inlet pipeline for cavitation and / or air leakage.

4) The packing or seal in the stuffing box is worn, causing air to leak into the pump casing

Elimination measures: Check the packing or seal and replace as necessary. Check whether the lubrication is normal.

5) Insufficient suction head when pumping hot or volatile liquids

Elimination measures: increase the suction head, consult the manufacturer.

6) Submerged depth of bottom valve or inlet pipe is not enough

Elimination measures: Consult the manufacturer for the correct immersion depth and use baffles to eliminate eddy currents.

7) The seal of the pump casing is damaged

Elimination measures: Check the condition of the gasket and replace it as required.

The power consumption of the fire fighting pump is too large

1) The direction of rotation is wrong

Remedy: Check the direction of rotation.

2) Impeller damaged

Elimination measures: Check the impeller and replace it as required.

3) The rotating parts bite

Elimination measures: Check whether the clearance of internal wear parts is normal.

4) Shaft bending

Elimination measures: Straighten the shaft or replace it as required.

5) The speed is too high

Remedy: Check the winding voltage of the motor or the steam pressure delivered to the turbine.

6) The water head is lower than the rated value. Too much liquid pumped

Elimination measures: Consult factory. Install the throttle valve and cut the impeller.

7) Liquid is heavier than expected

Elimination measures: Check specific gravity and viscosity.

8) The stuffing box does not have the correct packing

Elimination measures: Check the packing and refill the stuffing box.

9) Incorrect bearing lubrication or bearing wear

Elimination measures: check and replace as required.

If you want to buy fire fighting pumps,please contact SUOTO PUMP.