Finish Thompson J102957-1 Carbon Ceramic Viton Mechanical Seal 3/4 Inch
Finish Thompson supplies the J102957-1 as the carbon ceramic viton mechanical seal 3/4 inch for AC5 series centrifugal pumps. It is the three quarter inch shaft seal that keeps pumped fluid inside the casing, with carbon running against ceramic and a Viton elastomer. It is built in carbon, ceramic and Viton FKM, which is what decides where it can safely be used.
Most pumps see this part replaced well before the pump itself needs attention. Seals fail from dry running, thermal shock or solids getting between the faces, and once a face is chipped or crazed it will weep continuously. Confirm the material and size against your pump before ordering, as the same position is offered in several variants across this range.
Key Features
- Carbon Ceramic Viton Mechanical Seal 3/4 Inch in carbon, ceramic and Viton FKM built to the original factory specification
- Three quarter inch seal with carbon and ceramic faces
- Viton FKM elastomers for broad chemical resistance
- 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 AC5 series centrifugal pumps
- AC5 series stainless pump service
- Repair of a pump leaking behind the impeller
- 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: J102957-1
- Part Type: Carbon Ceramic Viton Mechanical Seal 3/4 Inch
- Material: carbon, ceramic and Viton FKM
- Position: Pump shaft at the backhead
- Fits: Finish Thompson AC5 series centrifugal pumps
- Shaft Size: 3/4 inch
- Quantity Per Pump: 1
- Condition: New
Frequently Asked Questions
Q: Can the pump be run briefly without this part?
No. Every component in the wet end carries a load or seals a joint, and running incomplete risks far costlier damage.
Q: Is this the genuine manufacturer part?
Yes. It is the factory component built to the original specification rather than a pattern copy.
Q: Should anything else be replaced at the same time?
Whatever the teardown exposes. Elastomers and bushings are inexpensive and are best renewed while the pump is already apart.
Q: What causes most premature failures on this part?
Running the pump outside what it was specified for, whether that is temperature, viscosity, dry running or an incompatible chemical.
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 mechanical seal before you order.
CLRMarine
