Vertical Multistage Centrifugal Pump Assembly and Disassembly

Vertical Multistage Centrifugal Pump Assembly and Disassembly

In general, Vertical Multistage Centrifugal Pump Assembly and Disassembly are reverse process. The process of assembly will affect pumps’ working, performance and service life. Therefore, normative assembly process is extremely important.

Yaness with more than 20 years manufacture and assembly experience at vertical multistage centrifugal pump. According to different modles, the process of assembly and disassembly are different. The article will shows the 4 types process with different models.

CDL and CDLF 1,2,3,4

● Put the circlip cover on the shaft, and then fit the sleeve, impeller, impeller sleeve, diffuser, support diffuser. Continue the assemble order till the last impeller is fitted. Then fit the impeller cover, washer, screw the nut. Pay attention to the position of the support diffuser, for less stages pump, the last one is support diffuser. For more stages pump, support diffuser should be increased accordingly, the distance of each support diffuser should be increased accordingly, the distance of each support diffuser should be even, and put on the support sleeve and bearing with support diffuser.

● Put the inducer on the inlet & outlet chamber, and then fit the finished parts as above on the inducer.

Fit the O-ring on the inlet & outlet chamber, put on the cylinder and the top diffuser.

● Put the pump head installed with O-ring, lining and corrugated spring on the cylinder. Screw the four nuts of the stay bolts on the base plate. Do not tighten one nut completely at one time, but tighten them symmetrically in turn.

● Fit the mechanical seal and tighten it, then install motor and coupling, screw the bolts in coupling (but not tightly), press the coupling and shaft down to the direction of the base plate. Then lift it about 1 mm in reverse direction, tighten the screws. Note that the space between the two couplings should be equal.

● Tighten fixing bolts in mechanical seal, rotate the coupling to ensure that the shaft can rotate freely and not be choked.

Revese the process above can disassemble a pump.

CDL and CDLF 8, 16, 20

● Put the circlip cover on the shaft, and then fit the sleeve, impeller, impeller sleeve, diffuser, support diffuser, bearing, support sleeve. Continue the assemble order till the last impeller is fitted, and then fit the impeller cover, washer, screw the nut.

● Put the inlet & outlet chamber on the base plate, then put the o-ring, clamp plate, inducer on inlet & outlet chamber, then put the finished parts on the inducer, and put the top diffuser on the top, tighten nuts of straps. At last, put on the cylinder.

● Put the pump head installed with O-ring, lining and adjusting rubber on the cylinder, then tighten the four stay bolts symmetrically in turn.

● Fit the mechanical seal and tighten it, then install motor and coupling, screw the bolts in coupling (but not tightly), press the coupling and shaft down to the direction of the base plate. Then lift it about 1 mm in reverse direction, tighten the screws. Note that the space between the two couplings should be equal.

● Tighten fixing bolts in mechanical seal, rotate the coupling to ensure that the shaft can rotate freely and not be choked.

Revese the process above can disassemble a pump.

CDL and CDLF 32, 42, 65, 85

● Put the inlet & outlet chamber on the base plate, fit flanges on inlet & outlet chamber at two sides, and fit the inducer.

● Put the first impeller on the shaft, tighten the nuts and put the impeller on the neck ring base of inducer, then put on the diffuser, impeller, support diffuser, until the top diffuser, then fix all the diffuser with the straps.

● Shaft parts: fit the bottom sleeve, cover, washer on the shaft, tighten the bolts, fit bottom bearing on the inlet & outlet chamber, fit washer. Then put the shaft parts on the inlet & outlet chamber, fit on O-ring, lubricate the O ring and then put on the cylinder.

● Fit stay bolts on the base plate, then fit the O-ring, adjusting rubber, air vent gag on the pump head, and put the pump head on the stay bolts, then put on the washer and tighten all the nuts.

● Fit the mechanical seal on the pump head, then fit the seal cover, tighten the bolts, and the bolts in the seal. Lift the shaft and insert the adjusting slice.

● Fit the bracket and motor on the pump head.

● Finally fit the coupling, tighten the bolts, and take out the adjusting slice. Rotate the coupling to ensure that the shaft can rotate freely and not be choked.

Reverse the above process to disassemble a pump.

CDL and CDLF 120, 150

● Put the inlet & outlet chamber on the base plate, fit flanges on inlet & outlet chamber at two sides, and fit the inducer.

● Fit washer, shaft sleeve, inlet impeller sleeve, cover and washer, fasten the nut.

● Fit impeller shaft sleeve, impeller, fasten impeller nut, ensure the size is 14.3 as figure shows.

● Put the shaft parts on the inducer, fit support diffuser, impeller sleeve and impeller, fasten impeller nut, then, fit diffuser, impeller, etc. till the last diffuser.

● Fit the top diffuser, use straps to fasten all diffusers. Fit O-ring on the inlet and outlet chamber, lubricate them and put on cylinder.

● Fit stay bolts on the base plate, fit O-ring on the pump head, adjusting rubber, air vent screw, etc. Then put pump head on the stay bolts, fit washer, fasten nut.

● Fit the mechanical seal on the pump head, then fit the seal cover, tighten the bolts, and tighten the bolts in the seal. Lift the shaft and insert the adjusting slice.

● Fit the bracket and motor on the pump head. Finally fit the coupling, tighten the bolts, and take out the adjusting slice. Rotate the coupling to e-nsure that the shaft can rotate freely and not be choked and loose.

Reverse the above process to disassemble a pump.