Water pump flow and the calculation method of lift pump flow head how to decide

flow pump head, water pump flow head, how to determine the pump flow method for calculating the lift

usually we will ask the user flow model selection of the pump head for how much, can't flow head not sure correct selection, sometimes when asked about how much customer traffic head requirements, there are a few clients that doesn't matter, now we remind customers of this statement is not possible, flow can no requirement, but head can't there is no requirement, have to tell us how much actual working condition such as vertical height, how how much horizontal distance, piping layout, what number of elbow, pipe size, transmission fluid, etc so that we can choose the right water pump for you.

head pump flow calculation method is as follows:

first determine the specific type of pump, with what series of pumps after use, can according to the actual working condition of the maximum flow required select flow, lift if not sure, can be transported according to the vertical height of the elbow and horizontal distance, head needed by the pipe loss can be calculated, enlarge 5% & ndash; — Has a value of 10% margin over the head, the two main performance parameters on the spectrum chart or series of characteristic curve to determine the specific models. Use of pump characteristic curve, find the flow on abscissa values, find the head on the ordinate, upward from the two values, respectively, and lead to the right vertical or horizontal line, two line intersection point lies squarely on the characteristic curve, the selection of the pump is the pump, but this ideal does not generally very few, often meet with the following several ways: A, * : intersection point above characteristic curve, it shows that flow meet the requirements, but the head is not enough, at this point, if the head was similar, or about 5% difference, still can choose, if the head differs A lot, had chosen pump head is bigger. Or try to reduce the loss of pipeline resistance. B, the second: the intersection point, at the bottom of the characteristic curve of the pump characteristic curve of fan trapezoidal range, set the initial model, and then according to the head difference how many, to determine whether cutting impeller diameter, if the head is very small, not cutting, if the difference in lift, as the required Q, H,, ns and cutting according to its formula of cutting impeller diameter, if point does not fall within the scope of the fan trapezoidal, elected head of the smaller pump. Sometimes must be considered when choose water pump production process requirement, choose different Q - shape H characteristic curve. Such as to the need to maintain a certain level of liquid level to the container, hope to have a larger amount of change, at this time and head change is very small, for the time should choose H - flat O curve of the pump. As: send oil tube furnace, if work flow changes little, is liable to produce coking furnace tube. To avoid this kind of circumstance, want but a slightly reduced flow, pipe medium oil pressure has increased considerably, focal scar that formed just to wash away by high flow pressure, at this moment, appropriate chooses the Q - H curve more ACTS of oil pump, would like to know you can refer to: oil pump

considering horizontal centrifugal pump, vertical centrifugal pumps and other type ( Pipeline, right Angle type, variable Angle type, Angle type, the parallel type, vertical type, diving sewage water pump, vertical sewage pump, detachable type, submerged sewage pump, no blockage type, self-priming sewage pump, gear pump, oil filled type submersible pumps, water filling type) 。 Horizontal pump disassembly convenient assembly, easy management, but the volume is big, the price is more expensive, to a large area; Vertical water pump, submerged in the water, in many cases, impeller can start at any time, to facilitate automatic contributed or remote control, and is compact, small installation space, the price is cheap.

when installing highly restricted can choose: used for conveying water horizontal centrifugal pump

want to reduce the area used for conveying pump sewage should choose: vertical sewage pump if the location of the liquid level is lower than pump is not installed on the ground the pump can be selected: submerged sewage pump

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this paper keywords: flow pump head, pump flow head, how to determine the calculation method of water pump flow head

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