Pump does not absorb water pressure gauge and vacuum gauge pointer severe beating 1, 2 infusion enough water, piping and instrumentation coupling at the leak 3, suction lift too high 1, check the bottom valve leaks multi-stage pump, then filling enough water 2. Tighten leak at 3, lower the height of the pump does not absorb water suction vacuum gauge indicates a high vacuum, the bottom valve is not open or is clogged 2, 3 suction line too much resistance, clogging of the filter 1, check the bottom valve 2, the replacement of water pipe 3, clean the filters but still the water pressure gauge 1, 2 outlet pipe resistance is too large, rotating in the wrong direction 3, 4 outlet pipe valve is not open impeller clogged 1. Check or shorten the pipes 2, check the motor 80LG50-20X6 Multistage Pump two intermodulation 3, open the outlet valve 4, remove the dirt in the impeller 1 less than the design flow rate, air suction 2, due to lower water levels and flooded deep enough 3, the impeller has a blockage 4, rotor and some serious wear 1 Check the leak site and the exclusion of 2 to extend the suction pipe, deepen the depth flooded 3, disassemble and remove foreign bodies 4, replace the seal ring pump power consumption is too large 1, mechanical seal overextended 80LG50-20X5 multistage pumps, and heat 2 , the amount of traffic 3, rotation grazing and the casing has 4, 5 pump bearing wear, shaft bend 1, appropriate to relax 2, 3 off a small gate opening, trimming 4, replace the bearing 5, replace or correct pump vibration increase 1, the impeller 2 partial blockage, impeller breakage 3, 4 flow is too small, and the motor shaft misalignment 5, 6 bearing damage, mixed with air, the occurrence of cavitation 1, disassemble and remove foreign bodies 2, replace 3, slightly open outlet valve 4, 5 fixed alignment, replace 6, change the suction position, improve water pipe XBD series of fixed fire pumps is my factory according to the actual needs of the market for fire pumps and special requirements 80LG50-20X4 multistage pumps, strict according to GB6245-1998 "fire pump performance requirements and test methods" recently issued national standards and developed a new type of fire protection products. By the National Fire Equipment Quality Supervision and Testing Center, the performance targets are met or exceeded standards. Features: pump compact, small size, appearance, structure decided to install small footprint, such as with shield can be placed outdoors. Impeller is mounted directly on the motor shaft, so as to ensure concentricity of the pump, thereby enhancing the operational stability of the pump and extend pump life. Usage: XBD series fire pump is mainly used for various public institutions, construction, high-rise buildings until the fixed fire extinguishing system, fire hydrant system. Multi-stage pump | 80LG50-20X6 multistage pump | Stone yuan (Certified Merchant) Ltd provided by Anguo City Shiyuan pumps. Anguo Shi Yuan Pump Co., Ltd. (www.shiyuanbeng.com) is specialized in "IS centrifugal pumps, XA centrifugal pump, BA centrifugal, B-type centrifugal pump, double suction centrifugal pump" of the enterprise, the company adhering to the "honesty, hard service "concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Geng wheat.