Regulator pump flow rate depends on many factors, of which the more important are:
(1) Category of system Consider the water quantity of a sprinkler when the turbo pump is used in a sprinkler system; and for a fire hydrant system, consider the amount of water in a fire hydrant.
(2) Whether there is no air pressure water tank supporting the setting of non-pressure water tank, the pressure regulator pump flow is not more than a nozzle or a fire hydrant water quantity calculation. A gas tank equipped with water, the system of water supplement and pressure assurance is carried out by the pressure tank, the pump flow only to meet the pressure on the flow of water tank requirements, that is, the pressure pump flow should consider the pressure of water Adjustable volume of the tank factors. At this point, the regulator pump flow should be calculated according to the total volume of air and water tank and the volume of water inside the tank. Pump water should be when the tank is the average pressure, not less than the maximum hourly pipe network traffic 1.2 times.
"High regulation" provisions do not have the provisions of the pressure tank must be configured, but no pressure tank, pump start frequently, easy to damage; pressure tank, pump start frequently can be alleviated, the system regulator Situation guarantees can be better reflected. However, the need to increase the cost of pressure tank, the general situation supporting the setting of pressure tank volume is not too large, the volume is less than 50L is appropriate. Shanghai has prepared a standard set of pressure pumps supporting atmospheric pressure water tank set by the Shanghai Haiying Machinery Factory.
(3) System-wide quasi-high-pressure water supply system with constant pressure pump (or stable high-pressure water supply system), the scope of indoors, but also indoor and outdoor. Indoor quasi high pressure water supply system, the pipe is made of steel pipe, the connection is made of thread, flange or welded connection. The leakage of the pipe network system mainly occurs in the sealed part of the water pump, and its quantity is relatively limited. The indoor and outdoor quasi-high-pressure water supply system, as the outdoor pipe using cast iron pipe, the socket socket connection, the interface seal with rubber ring, pipe network larger, interface leakage in the entire amount of leakage accounted for a considerable proportion. Immediately after the construction of the pipeline, the soil will be replied, and sometimes the interface part will be reinforced by the suspected soil. Even if there is leakage, it is very difficult to take remedial measures. All these indicate that indoor and outdoor use of quasi-high-pressure water supply system, the pump flow should leave enough room.
In general, the pump flow should be adjusted according to different circumstances.
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