Velocity m Hw- suction pipe pressure loss m.Vs- pump intake (ss Section) at / s for the unity of the international standards, and now the new standards required by the pump of NPSH (NPSH) r represents the pump cavitation performance of NPSH refers to the pump suction port (ss Section) of energy per unit weight of the liquid has a vapor pressure of more than (that pump cavitation does not occur with the pump inlet pressure required), units in meters liquid column (m) represents 300ZJ-I-A56 mechanical seal, the value obtained from the pump test. In pump selection work, we must refer to the pump performance curve to select a pump operating point, the water pump, oil pump, chemical pumps, which do not convey abrasive slurry pump operating point in the high area of ??machine optional letters, in order to improve the use of economic benefits; in the slurry pump according slurry characteristics and pump life priorities premise, reasonable choice pump operating point (see chapter VI), in order to improve Comprehensive economic use of the pump. Mechanical seals | 250ZJ-I-A90 mechanical seal | slurry pump (high merchant) Ltd provided by Shijiazhuang-pie pump. Shijiazhuang-school Pump Co., Ltd. (www.shipaipump.com) is specialized in "slurry pumps, submersible pumps, sewage pumps, chemical pump, pulp pump, water pump, mud pump, multi-stage" of the enterprise, the company of " honesty, hard service "concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Manager Xu.