How to calculate fire fighting pump churn pressure?

fire fighting pumps are special pumps installed on fire trucks, fixed fire extinguishing systems or other firefighting facilities and used to transport liquid or fire extinguishing agents such as water or foam solutions.

This article contains the following:

How to calculate the fire fighting pump head

fire fighting pump related terms

fire fighting pumps can be classified according to the following rules

1.How to calculate the fire fighting pump head

The fire fighting pump head refers to the total energy per unit weight of liquid in the pump, which is an important working parameter to measure the pump body. Next, World Factory Network introduces the calculation method of fire fighting pump head in detail. When selecting fire fighting pumps, the head is also an important reference data. Many friends search the calculation method of fire fighting pump head on the Internet. The following information hopes to help everyone. fire fighting pump head calculation formula: Hb=Hq+hd+hg+hzHq——the most unfavorable point fire hose nozzle required water pressure (mH2O)hd——fire hose head loss (mH2O)hg——pipe network head loss (mH2O)hz——The flow distribution of the height difference (mH2O) of the fire tank water surface and the most unfavorable hydrant (mH2O) fire riser, the calculation of the pressure of the water gun nozzle and the pressure loss of the hose are all the same as the calculation method of the height of the water tank. After the height of the fire water tank and the outlet pressure of the fire water pump are calculated according to the above method, the hydraulic check calculation should also be carried out according to the most unfavorable pipe section during maintenance or damage. The indoor fire vertical pipe is best to use the same pipe diameter, the same fire hydrant plug diameter, the same specification hose diameter and water gun diameter. The calculation formula of the fire fighting pump head technical measures is: b. ∑h pipeline head loss

2.fire fighting pump related terms

1 Diversion time

The time from when the water diversion device starts to work until the pressure gauge at the outlet of the fire fighting pump starts to display pressure.

2 deep

The height difference between the reference level of the fire fighting pump and the suction liquid level.

3 High and low pressure combined working conditions

fire fighting pumps can provide both high and low pressure working conditions.

4 Medium and low voltage combined use conditions

fire fighting pumps can provide both medium and low pressure working conditions.

5 Maximum working pressure

The outlet pressure of the fire fighting pump at zero flow.

4 series fire fighting pump

At the same time, it has a group of fire fighting pumps with similar structural forms, the same parts and materials, processed and manufactured by the same process, and the models are prepared by the same method (including the custom part of the enterprise).

3. fire fighting pumps can be classified according to the following rules:

According to the form of power source, it can be divided into:

a Diesel engine fire fighting pump unit

b motor fire fighting pump group

c Gas turbine fire fighting pump unit

d Gasoline engine fire fighting pump unit

Can be divided into

a Water supply fire fighting pump unit

b Stabilized fire fighting pump unit

c Hand-held mobile fire fighting pump unit

According to the auxiliary features of the pump set, they can be divided into:

a Ordinary fire fighting pump unit

b Deep well fire fighting pump unit

c Submersible fire fighting pump unit

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