mechanical seal replacement
A mechanical seal replacement checklist covering part numbers, shaft and seat dimensions, seal construction, fluid conditions, and pump application.
Photograph the seal, pump nameplate, cartridge or component markings, shaft, seat, and installation orientation. Record the pump manufacturer, pump model, seal number, and any service-kit number before removing or cleaning the assembly.
Record shaft or sleeve diameter, stationary-seat bore and outside diameter, seal width or operating height, gland dimensions, bolt pattern, and any locating features. Use the manufacturer’s drawing or sizing guide to distinguish the dimensions that define the seal type.
Record whether the seal is a component, cartridge, split, bellows, pusher, or another construction. Note the rotating and stationary face materials, spring arrangement, secondary seals, balance, and direction of rotation where the catalog exposes those fields.
Write down pumped fluid, concentration, solids, temperature, pressure, speed, lubrication, flush or barrier plan, and any dry-running or start-stop conditions. These facts can rule out a dimensionally similar seal.
Compare the complete candidate designation, dimensions, materials, and service limits with an OEM or seal-manufacturer source. If the evidence supports only a dimensional candidate, request supplier confirmation before installation.