Typically, the pump catalog are given [Hs] value (pump suction on the vacuum height) or (NPSH) r value of slurry pump disassembly ring (cap) is at standard atmospheric pressure Pa (Pa = 1.033kg / Under cm2 = 10.33mH2O) and water temperature is 20 ℃ (when Pv = 0.024kg / cm2 = 0.24mH2O) case, the test was to pump slurry pump shield, so (NPSH) r and [Hs] You can use the following formula in terms of: (NPSH) r = 10.09- [Hs] + Vs2 / 2g m (1-11) where: Vs- pump suction velocity m / s; in order to meet the requirements of users in different working conditions and reduce the pump Factory production costs, often to a pump to determine pump works two direct-speed (ie with different stages of motor) slurry pumps, adding a number of impeller slurry pump impeller diameter or identify a different diameter shaft sleeve (spacer sleeve ), adding a set of sheave different gear ratios, the pump has a different speed. Both methods can obtain a set of the pump performance curve, this combination performance curve is very convenient for the user selection. Figure 1-2 below to set the pump impeller diameter change combination speed when the pump performance curve. Slurry | 300ZJ-I-A56 | slurry pump sleeve (spacers) Ltd provided by the Shijiazhuang-send pump. Slurry | 300ZJ-I-A56 | slurry pump sleeve (spacers) is Shijiazhuang-school Pump Co., Ltd. (www.shipaipump.com) this year introduced a new upgrade, the above picture is for reference only, please dial this Tel pages or pictures on obtain the latest information, Contact: Manager Xu.