Introduction to the assembly process of centrifugal pump:General requirements for assembly1.1 The pump parts must be qualified products, and all rust prevention treatments have been completed.1.2 During assembly, the parts shall be cleaned without oil, dirt and scrap iron.1.3 The exposed machined surfaces of carbon steel and cast iron parts shall be coated with antirust oil or grease.1.4 After the pump is assembled, there must be an arrow mark on the rotation direction of the pump.1.5 After assembly, the pump must be marked, and the method shall be implemented according to Q/SPCN.G.28001 "Product Identification and Traceability Control Procedure".1.6 After passing the pump performance test, the water in the pump shall be removed, and the carbon steel pump body flow passage, carbon steel impeller flow passage and external surface as well as carbon steel pump shaft shall be coated with antirust oil or grease. Anti rust process of the machine.1.7 Before packaging the pump, install a 5mm thick Q235-A material blind plate at the inlet and outlet of the pump body. If there is a matching flange, install it on the blind plate.2. Requirements for assembly and Z final assembly2.1 When assembling flat keys and bearings, do not knock them directly with a hammer. They shall be assembled with wooden hammers, copper rods or special assembly tools.2.2 When the inner diameter of the bearing is an interference fit such as r6 and s6, it is necessary to conduct hot assembly, and the temperature is 80-120 ° C.2.3 The connecting end of stud bolt and parent body shall be coated with dry oil, and the length shall be consistent and tightened evenly.2.4 During the assembly process, it is strictly forbidden to scratch the surface of parts, especially the mating and sealing surfaces, so as not to affect the assembly quality.3. Assembly of mechanical seal3.1 During assembly, each joint surface shall be closely matched, and the friction surface shall be coated with industrial Vaseline.4. Assembly4.1 When assembling the coupling, lubricate the inner hole, journal and key. Use even force during assembly to avoid damage to parts due to impact.