The Choice of vertical turbine pump

The water that is certainly put to use for firefighting continually must be pressurized by fire pump so as to attain the requirement of stress. As well as the defects of fire pump set quite possibly lead to a good loss that could have already been avoided. The function of fire pump should really superior than the water in life and production, so it's important to select a certified fire pump for firefighting.

The Usa stipulates that the maximum flow of rotary vacuum pump must be 150% of designing flow; the minimum head is 65% with 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 occasions around the head of fire pump. Plus a flow meter must be installed around the outlet pipe of fire pump, its variety must attain 175% of chosen pump flow. A stress gauge that is 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 jockey pump regulator in provide technique will be to keep the regular stress of fire pump. The stress of pump regulator might be determined by the stress with the program, its stress should certainly typically 0.1Mpa-0.2Mpa larger than the principle pump, or 1.1-1.two occasions from the primary 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 program under regular conditions. As well as the stress of pump regulator need to be sufficient to retain the method stress.

According to a survey that the flow of vertical turbine pump is normally 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 should certainly be 0.1Mpa-0.2Mpa greater than the key pump, or 1.1-1.two instances in the major pump. Plus a stress tank ought to be installed in technique, if not, the controller of pump regulator need to be paid more attention to avoid the pump regulator starting frequently because of your effect of water hammer. Only in this way can a fire pump program function generally. And these standards can also be applied to electric fire pump.