Self-priming pump suction pipe installation should pay attention to: 1, suction inlet installation height can not exceed 5 meters, when conditions permit, self-priming suction inlet installation should be as low as possible lower than the lowest storage tank water level, and try to shorten The length of the suction tube, less fitted elbow, this will help shorten the self-absorption time, improve self-absorption function. 2, the suction pipe in the valve, flange, etc. should be strictly prevent leakage or leakage of liquid, that is, there is no leakage of suction pipe exists. 3, should prevent the inhalation of solid body and other debris pump, this suction pipe should be set on the filter. The effective area of ​​the filter should be 2-3 times the cross section of the suction pipe. The filter should be checked regularly. 4, suction pipe and discharge pipe should have their own support, the pump itself is not allowed to withstand the load pipe. 5, the pump is installed, should make the electrostatic resistance of the pump and pipeline to meet the requirements of its grounding resistance. 6, the installation should be strictly checked pump casing and piping in the presence of stones, iron sand and other debris. 7, correction of pump coupling and motor coupling installation clearance and coaxiality, its different axis tolerances of 0.1mm. The difference between the pump shaft and motor shaft height can be adjusted on the foot pad copper or iron. 8, 3-4 hours after the actual operation of the unit for the final inspection, if no adverse phenomena, the main installation has been properly, the shaft should be checked in the trial operation. 9, the pump bearing body cooling unit with a cooling water connector for the hole with 12 holes for the hose or plastic pipe, the thread size M12x1.75. 10, if the pump outlet pipe is equipped with a one-way valve in the process of self-priming can not make the pump discharge gas smoothly, should be connected to the outlet of the pump exhaust pipe and valve. Self-priming pump and motor direct drive, should pay attention to the coaxiality of the pump shaft and the motor output; pump installation accuracy or not have a greater impact on the smooth running of the pump and the service life, it must be carefully installed Correction. Self-priming pump coupling must be solid and good nut, and lock the nut, beware of nut loose, otherwise easy to cause the impeller to move, resulting in mechanical failure. Self-priming pump body to maintain a certain amount of storage fluid in order to achieve better self-priming capacity and prevent mechanical seal dry friction, the pump must be imported higher than the pump shaft centerline.
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