Such an meeting course of for a manufacture or a disassembly course of for service, is troublesome if not unimaginable for a user/customer to perform within the subject. Thus, these steps are normally solely undertaken in a manufacturer's shop facility. Not so with the cartridge seal eleven and the again plate 12 of the present invention. In enterprise a seal substitute, for instance, the pump housing and impeller are first eliminated. Then, the snap-ring 79 is removed, from the surface face of the back plate 12.

Yet another characteristic distinguishes the current seal cartridge and back plate combination from the prior artwork construction, proven in FIG. Both for installation and elimination of seal eighty one, the bolts 86 have to be eliminated.

This can be accomplished without any additional disassembly or removal of the again plate from the facility frame adapter. Finally, after loosening the set screws 58 of the old cartridge seal, the old seal is faraway from the inside side of the again plate. After installing the brand new seal from the inner facet of the again plate, the re-assembly course of is carried out in reverse of that course of just described.

To achieve entry to bolts 86, the extra step of removing the back plate from the facility frame adapter of the pump is required. The old back plate of an existing pump can't simply or cheaply be modified to incorporate the extra material required by flanges 83.

Welding such pieces to the shopper's back plate merely prices an excessive amount of, so the customer is compelled to buy a new back plate, made like plate eighty two. Thus, adapting the prior art cartridge seal eighty one to an present pump requires a brand new back plate eighty two, specially made to accommodate the bolt mounting arrangement.