Analysis of 500LC-50 vertical long axis pump mechanical seal assembly preparation

500LC-50 vertical long shaft pump is a high technical requirements of the pump, the selection of mechanical seal is also very strict, it has a certain effect on pump price, service life and assembly will directly affect the mechanical seal mechanical seal. Therefore, the pump price experts set up the pump 500LC-50 vertical vertical shaft pump mechanical seal assembly before the need for preparation.

(1) check the mechanical seal type and specification meets the requirements of design drawings, all parts (especially the sealing surface, auxiliary seal ring) without damage, deformation, cracks and other phenomena, if defective, must be replaced or repaired.

(2) check the fitting size, roughness and parallelism of each part of the mechanical seal, so as to meet the design requirements.

(3) the use of small spring mechanical seal, should check the length of the small spring and rigidity are the same.

(4) check the amount of deflection and swinging runout, compliance with technical requirements, the seal cavity meets the installation size, sealing end cover and the shaft is vertical, general requirements: axial runout is no more than 0.5mm; the shaft swing (rotating ring ring) is not greater than 0.06mm; the maximum deflection of the shaft is not greater than 0.05mm the sealing end cover; and the gasket contact plane of the center line of the vertical deviation of 0.03 ~ 0.05mm.

(5) should be kept clean, especially the rotary ring and stationary ring, the sealing surface and auxiliary sealing ring surface should be no impurities, dust. It is not allowed to wipe the sealing surface with an unclean cloth.

(6) the sealing element is allowed to be struck with a tool to prevent the seal from being damaged.