The water that is certainly made use of for firefighting consistently must be pressurized by fire pump so as to attain the requirement of stress. Along with the defects of fire pump set almost certainly bring about an awesome loss that could happen to be avoided. The function of screw pump must superior than the water in life and production, so it's important to select a certified fire pump for firefighting. 

 

The United states of america stipulates that the maximum flow of firefighting pump will need to be 150% of designing flow; the minimum head is 65% on the head of chosen work-yard. When the fire pump is closed, the maximum head is 140% with the head of chosen work-yard, the pump flow is 1-2L/S, the head is 1.1-1.two instances around the head of fire pump. Plus a flow meter will need to be installed around the outlet pipe of fire pump, its variety should certainly attain 175% of chosen pump flow. A stress gauge which can be as much as 89mm in diameter should certainly also be fixed around the outlet pipe. All these parameters may be put to use as references for designers and purchasers.

 

The function of water ring vacuum pump in provide technique is always to sustain the standard stress of fire pump. The stress of pump regulator is often determined by the stress in the technique, its stress must ordinarily 0.1Mpa-0.2Mpa larger than the key pump, or 1.1-1.two occasions on the most important pump. As for the flow of pump regulator, the NFPA20<Standand for the Installation of Centrifugal Fire Pumps> (1996 Edition) set that the flow of Stress Maintenan Pumps/Jocey Pumps/Make&mdash;Up Pumps is not less than the amount of leakage of your method under standard conditions. And also the stress of pump regulator should certainly be sufficient to keep the method stress. 

 

According to a survey that the flow of pump regulator is continually between 0.5L/S to two.0L/S in many countries, the water hammer may exist when the pump is closed without stress tank in the method. The flow of pump regulator is recommended within 1.0L/S-2.0L/S, the stress of it ought to be 0.1Mpa-0.2Mpa larger than the key pump, or 1.1-1.two instances in the vertical cantilever pump. In addition to a stress tank really should be installed in technique, if not, the controller of pump regulator should certainly be paid more attention to avoid the pump regulator starting frequently because with the effect of water hammer. Only in this way can a fire pump technique function ordinarily. And these standards can also be applied to electric fire pump.