1. Generally, there are: impeller, bearing, sealing device, sealing material, spindle, key, induction wheel and other materials.

2. The water pump is a machine for conveying or pressurizing liquids. It transmits the mechanical energy or other external energy transmitted to the liquid, causes the liquid energy increase, mainly used for conveying liquid, including water, oil, the sour lye, the emulsion, hangs the emulsion and the liquid metal and so on, also may transport the liquid, the mixture of gases as well as contains the suspended solid liquid. The technical parameters of pump performance include flow, suction, head, shaft power, water power, efficiency, etc. According to different working principles can be divided into volume pumps, vane pumps and other types. The volumetric pump USES the variation of its studio volume to transfer energy. Vane pump USES the interaction of rotary vane and water to transfer energy, including centrifugal pump, axial pump and mixed flow pump.