Chemical centrifugal pump installation considerations of import and export of pipe diameter

Chemical centrifugal pump is widely used, the main chemical centrifugal pump is a lot of more phyletic, fluorine plastic centrifugal pump, stainless steel centrifugal pump, self-priming centrifugal pump, pipeline centrifugal pump, and so on, in the installation of centrifugal pump when should pay attention to the diameter of the requirement, in order to avoid pipe diameter installation errors affect the performance of the centrifugal pump, centrifugal pump installation to import the diameter of the suction pipe shall not be less than the diameter of the pump inlet. Centrifugal water pump suction pipe diameter is generally larger than the pump inlet diameter of 1 ~ 2 grades, reciprocating pump suction pipe diameter is generally larger than the pump inlet diameter of 1 ~ 3 levels. Why is that? 1, the suction flow rate meet the design requirements, prevent pump to protect the pump impeller ( For the same reason, general centrifugal pump suction pipe diameter should not less than the pump discharge pipe diameter) 。 2, suction pipe diameter is big, also when the flow velocity is small, the flow loss, to avoid cavitation ( The flow of liquid density is less than 650 kg/m3, pump suction pipe should be 0. 01 ~ 0. 1 the gradient of slope to the pump, gasification to produce returns suction tank of gas and to avoid any pump cavitation. State of liquid in the pump suction pipe close to the bubble point, the pump suction piping should be the low slope step by step to the pump) 。 Set flaring pump discharge pipe, the flow channel section, in the pump high-speed fluid dynamic pressure head into static head, namely into for pump lift, further boosting. For small head, small flow rate, at the request of the process allows the small diameter of pump, the suction pipe and the exhaust pipe can not add reducer
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