Ningbo sewage pump manufacturer conclusion centrifugal pump and drainage pump will reduce what element

Centrifugal pump and drainage pump will reduce what element centrifugal pump, sewage pump volume loss. Bypass within the check valve, leakage, pipeline sewage pump, pipeline centrifugal pump export high-pressure fluid channeling to pump suction; Sealing ring wear. Flow channel erosion, hydraulic loss increase impeller flow channel plugging, if impeller part port congestion, will affect the work of the impeller, led to the outlet pressure drop. So you need to tear open centrifugal water pump removal check. In order to prevent the problem again, if necessary, can be set up in front of the centrifugal pump inlet filter unit. Impeller blade corrosion or erosion perforation, when the rotating and stationary part inside the pump clearance exceeds the scope of design, will lead to internal leak, embodied in the pump discharge pressure drop, such as impeller mouth ring gap, gap between the level of multistage water pump. At this time should undertake the corresponding overhaul, responsible for the parts of the gap is too large for repair or replacement. Entrance to the cavitation occurs, if the pump suction pressure is too low, lower than the saturated vapor pressure of pumping medium, will form the cavitation. Check the import pipeline system at this time whether the presence of blocking or import valve opening is too small, or improve the suction liquid level height of the pool. Speed is reduced, and is the important factors influencing the pump impeller diameter of pump rotation speed, in the case of other conditions unchanged, the secondary pump lift and speed is direct ratio relation, visible speed effect on the head is very big, sometimes because of some reason of external makes the pump speed is reduced, will reduce the pump lift accordingly. Shall check the rotational speed of pump at this time, if that is the speed is not enough, should check the reason, the reasonable solution. Point to the big flow low head offset, in general, the performance of the centrifugal pump has a continuous downward curve, flow with the loss of the lift increases gradually. In the process of operation, due to some reason pump back pressure decreases, the working point of the pump device passively as curve to the low lift large flow deviation, it will cause head lower, this is due to the change of the external factors such as equipment, no special relationship with the pump itself. At this time as long as the increasing back pressure pump, such as closing the outlet valve, etc. To solve the problem. Motor reversal, due to the connection of the reasons lead to the motor to the actual requirements of the pump to the contrary, it generally starts to look at the pump, if turned inside out, on the motor terminal shall be any two wires on the exchange. The conveying medium viscosity becomes big head also small pipeline centrifugal pump hm depends on the theory of pump impeller geometry size and the work speed, and has nothing to do with the characteristics of medium and density. This is the vertical centrifugal pump performance test and assess its can use room temperature water hm theory basis. If a centrifugal pump, sewage pump impeller mouth ring and the pump casing mouth ring clearance is too large will make head down.
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