4, self-priming centrifugal pump with a high speed, small size, light weight, high efficiency, large flow, simple structure, no pulse infusion, steady performance, easy operation and convenient maintenance. Therefore, the following exceptions should be used wherever possible self-priming centrifugal pump: a metering requirements, the selection of a high lift pump metering requirements, small flow and low flow high head no suitable self-priming centrifugal pump can be used, the choice of reciprocating pump , it can also be used as pump cavitation vortex less demanding. ZX self-priming pump working principle and structure described pump sealing mechanism to prevent liquid oil inside the high pressure zone to the low pressure area is leaking around the seal ring, 50ZX15-60 pump, before sealing ring mounted on the pump body, after sealing rings mounted in bearings upper body, pump, when the pump after long-term operation of the seal ring wear to a certain extent, and affect the efficiency of the pump and self-priming performance, should be given replacement. 50ZX12.5-50 priming pump priming pump _ _ self-priming centrifugal pump provided by the Shijiazhuang-faction Limited. Shijiazhuang-school Pump Co., Ltd. (www.shipaipump.com) strong, credible, and other industries in other Shijiazhuang, Hebei accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Shijiazhuang-faction pump into the brilliant and you work for a better future!