NFPA20 Standard Fire Fighting Centrifugal Pump

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100 unit/month

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Product Description:

Quick Details

  • Place of Origin: Zhejiang, China (Mainland)

  • Model Number: D

  • Theory: Centrifugal Pump

  • Structure: Multistage Pump

  • Usage: Water

  • Power: Electric

  • Standard or Nonstandard: Standard

  • Fuel: fire fighting pump

  • Pressure: High Pressure

  • Application: fire fighting pump

  • Material: 304.316.316L S.S

  • Pump: multistage centrifugal pump

Packaging & Delivery

Packaging Details:Standard plywood case or carton for each fire fighting pump.
Delivery Detail:15 working days from receiving payment

 

Advantages

1.Directly coupled, vibration proof and low noise.

2.Same diameter of inlet and outlet .

3.NSK bearing ,which is the most famous brand in China.

4.Circulating flow cooling ensure mechnical seal long life .

5.Small foundation required that will saving construction investment by 40-60%.

6.Excellent seal that is no leakage

 

Working Conditions

Rotating speed: 3600r/min, 1800r/min, 2960r/min, 1480r/min

Medium: clean water or other liquids similar to clean water in physical and chemical properties

Medium temperature: -10 ~ 80°C,400°C available under special design

Ambient temperature: Up to 40°C

Range of capacity:1.8~2000m3/h

Range of head: up to230m

Maximum working pressure: suction pressure+head of pump≤25 bar

 

 

Pump Construction

Casing/impeller:cast iron,stainless steel,copper,bronze

Shaft:carbon steel 45#,stainless steel

Mechnical seal:graphite/silicon carbide/tungsten carbide

 

 

 

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Q:The reason why the pump is overloaded
(1) the influence of the basic installation on the equipment.The quality of equipment foundation installation has great influence on the quality of equipment operation. Iron pad placed properly, causing around the foot bolt hanging device, in alignment and fastening process for iron pad hanging, tighten anchor bolts will cause deformation of crosshead slide in the crankcase, the cross head is blocked in the operation of reciprocating load increases when the chute.W5 type reciprocating vacuum pump in the structural design of the cylinder body is cylinder, and the piston, intake and exhaust valve after the heavy weight in the foundation design without considering the cylinder support or hanger, the cylinder will be in a suspended state, because the weight of the crankcase cylinder will cause deformation of the cylinder and slide and slide the concentric degree of difference, so that the cross head is blocked in the slideway and the piston reciprocating operation is blocked during the reciprocating motion in the cylinder caused by the increase of the load.According to the above analysis, inspection found that the vacuum pump end of the cylinder body is slightly lower than the end of the crankcase, cylinder pad iron is low, deformation of crosshead guide foot bolts, the cross head caused by load increases in the slideway and the piston in the cylinder reciprocating operation is blocked, this is one of the reasons causing motor overheating.(2) cylinder and valve coking;The influence of process, cylinder and valve of reciprocating pump is easy to coke, Coke will cause the piston cylinder and piston in reciprocating cylinder operation when the load increases the valve is blocked; coking will cause poor exhaust, the valve closed lax, increasing load, low vacuum degree; clearance at the cylinder piston striking the cylinder will cause coke it will increase the load of cylinder, valve has found the phenomenon of coking, which is mainly caused by the low degree of vacuum.
Q:Fire pump room is required to set up water pump control room?
What is the concept of fire pump control room? If there is a control room host automatic alarm automatic fire alarm system of words (through the pump distribution box can also control) can control the fire pump, if there is no distribution box automatic alarm system you can through the pump room control
Q:Yang Chengtai big, the pump power is too small, the water pump will be bad?
No, only when the operation of the low lift point is super power (burning motor), high lift point operation, low efficiency, small amount of water, or even no water. For example, a nominal 10 meters pump, flow rate of 10 square / hour. The actual lift 15 meters, the water pump is small or no water. The actual head is 5 meters, traffic may 20 square / hour, this time may exceed current, the motor may burn.
Q:How many kinds of pumps are there? What are the advantages of soft start?
Soft start is prepared, hard start is not prepared, the machine suddenly can not stand! Ha-ha
Q:Is there a water pump with its own flow regulating function?
It has a water pump with adjustable flow capacity, I used it. Can also landing professional production pump manufacturers web site inquiries.
Q:How much is the flow rate of fire hydrant and spray shared water pump?
Fire fire water is superimposed, at the minimum, the lowest 5L/S automatic spraying fire hydrant, light danger level 13.9L/S, the least is 18.9L/S, but the data is useless, the data are not spraying fire hydrant, concrete analysis of high-rise buildings like the dangerous level according to the calculation, the general design, the concrete building needs the high-rise building minimum 20L/S, automatic spraying dangerous level according to the general 30L/S, 50L/S need to flow
Q:What is the function of the pump?
Drainage or irrigation
Q:What does the temperature range of the pump mean?
The temperature range refers to the temperature range of the medium in which the pump works. It is mainly determined by the influence of the pump material, especially the material of the shaft seal.
Q:What are the conditions for the series and parallel connection of the pumps?
Parallel pumps: the pump is required to lift the same. This effect is to increase traffic.Pumps in series: requirements are similar to the flow of water pumps. This allows you to increase the total head and recommend adding small pressure tanks during the series connection.
Q:How do I know the pump pressure?
That is, the rated pressure minus the pipe loss, and then less inlet pressure (generally suction pump inlet pressure is negligible), that is the working pressure.The head of a centrifugal pump is also called the pressure head of a pump. It is the energy gained by the pump of the unit weight and the fluid. Pump head size depends on the structure of the pump (such as the diameter of the impeller, the bending of the leaves and so on, speed. At present, the pressure head of the pump can not be calculated accurately in theory, usually measured by experimental method.

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