Head low, traffic is heavy, the choice of axial flow and mixed flow pumps. Medium viscosity (greater than 650 ~ 1000mm2 / s) when, 40ZX10-40 a pump, considering the selection of rotor pump or a reciprocating pump (gear pump, screw pump) medium containing 75% gas, pump, flow is small and viscosity of less than 37.4mm2 / s, optional vortex pump. Start priming the pump for frequent or inconvenient occasions, should be used with self-priming pump, such as self-priming Self-priming centrifugal pumps, self-priming vortex pump, pneumatic (electric) diaphragm. ZX self-priming pump working principle and structure shows that with this process again and again to proceed, the suction pipe in the air continuously reduced until exhaust gas, 25ZX3.2-20 pump, complete self-absorption process, 25ZX3.2- 32 pump, the pump will be put into normal operation. In some of the bottom of the pump bearing is not cooling chamber. When the bearing caused by heat bearing temperature rose more than 70 ℃, in the cooling chamber through any one of the coolant pipe fittings, into the coolant circulation cooling. 25ZX3.2-32 priming pump priming pump _ _ self-priming centrifugal pump provided by the Shijiazhuang-faction Limited. Road Zhiyuan, temper forward. Shijiazhuang-school Pump Co., Ltd. (www.shipaipump.com) aims to become and you win symbiosis, strategic partners to move forward, more determined to become the other's most influential business, and you leap together to success!