Finish Thompson J102446 EPDM Diffuser O-Ring
The J102446 is the epdm diffuser o-ring used in Finish Thompson MSKC and MSVKC multistage magnetic drive pumps. It seals the diffuser between the pump stages so that pressure built in the first stage is carried into the second rather than leaking back. It is built in EPDM, which is what decides where it can safely be used.
Treat it as a service item rather than a permanent fitting. A failed diffuser seal costs head without any external sign at all, because the leak is internal from one stage back to the other. When ordering, match the part to the pump as it was actually built rather than to the catalog model alone, since material and size options were specified at the time of purchase.
Key Features
- EPDM Diffuser O-Ring in EPDM built to the original factory specification
- EPDM for caustics, amines, ketones and hot water
- Seals the interstage diffuser joint
- Sized and finished to drop straight into the position it came from
- Inexpensive component whose failure takes the whole pump out of service
Applications
- Finish Thompson MSKC and MSVKC multistage magnetic drive pumps
- High head multistage chemical circulation
- Investigating a multistage pump that has lost head with no visible leak
- Scheduled overhaul and annual inspection of the pump
- Repair of a pump taken out of service after a leak or a loss of performance
Specifications
- Brand: Finish Thompson
- Manufacturer Part Number: J102446
- Part Type: EPDM Diffuser O-Ring
- Material: EPDM
- Position: Diffuser joint between stages
- Fits: Finish Thompson MSKC and MSVKC multistage magnetic drive pumps
- Quantity Per Pump: 1
- Condition: New
Frequently Asked Questions
Q: Does a replacement ring need a torque check afterward?
The fasteners should be drawn down evenly in a cross pattern, then rechecked after the first run once the joint has settled.
Q: What does a flattened cross section mean?
It is compression set, and it tells you the ring has given up the elastic recovery that keeps a joint tight through heat cycles.
Q: Should the mating groove be cleaned before fitting?
Yes. Old elastomer residue or dried product in the groove stops the new ring seating flat and is a common cause of a repeat weep.
Q: Can the ring be stretched over a housing to fit it?
A small amount of stretch is normal during assembly, but it should relax back into the groove before the joint is drawn together.
Not sure this is the right part? Send us a Picture of the pump plate on your pump and the CLR Marine team will confirm the correct diffuser O-ring before you order.
CLRMarine
