Can the minimum return pipe of the pump be connected from the pump outlet to the pump inlet?
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Can the minimum return pipe of a high-pressure water pump be connected from the pump outlet to the pump inlet? Install an orifice plate on the return pipe to reduce the pressure to the same level as the pump inlet pressure?
If this pump sends fluid from the outlet back to the inlet, then what’s the point of having it?
Reply to 2# sdhzmz: It’s just partial reflux, used to protect the pump. But isn’t it usually sent to the storage tank?
Reply to 3# thf: There is no storage tank, just a pressure pump.
Sure, we actually use it in practice
Install an orifice plate on the return pipe to reduce the pressure to the same level as the pump inlet pressure? Note: The outlet pressure needs to be reduced to the same high level as the inlet pressure. If there is already such a high pressure at the pump inlet, then what’s the need for a pump?
This method is unreliable; the safety factor is too low, as they are high-pressure pumps with a very large pressure difference, requiring space to balance it out； A throttle orifice plate must be installed, and it should be controlled using a double valve; under normal circumstances, it is connected to the water inlet tank or deaerator.
I disagree with connecting a return pipe. If throttling and voltage regulation are needed, simply adjust the valve opening. For protection purposes, use variable-frequency start control. Connecting a return pipe is the stupidest approach: L
Since the diameter of the return pipe should be smaller than that of the pump’s outlet pipe, the liquid pressure inside the return pipe can be lower than the outlet pressure. With the addition of a throttle orifice, the pressure can be reduced to roughly the level of the inlet pressure; this is just my personal opinion
OP, in my opinion, the minimum reflux serves several purposes: it provides protection by preventing excessive pressure from causing damage to the pump; it also warms the pump, preventing high-temperature materials from coming into direct contact with the cold pump body and impellers, which could otherwise cause damage to the pump. Additionally, it prevents certain materials from staying stagnant, thus keeping the materials in a state of continuous flow. Generally, the diameter of this pipeline is 0.75 inches, which is much smaller compared to the diameters of the pump’s inlet and outlet pipelines. . .
I think it’s possible; it’s equivalent to recycling