Finish Thompson J100018 Viton Inner Tube O-Ring
Finish Thompson supplies the J100018 as the viton inner tube o-ring for PFS sealless drum pumps. It seals the joint in the inner tube so that pumped fluid travels up the discharge path instead of leaking into the outer tube. It is built in Viton FKM fluoroelastomer, which is what decides where it can safely be used.
Most pumps see this part replaced well before the pump itself needs attention. A tired inner tube seal is the classic cause of a drum pump that seems to have lost flow with no visible leak anywhere on the outside. Confirm the material and size against your pump before ordering, as the same position is offered in several variants across this range.
Key Features
- Viton Inner Tube O-Ring in Viton FKM fluoroelastomer built to the original factory specification
- Viton FKM seal for the PFS inner tube joint
- Renewed as a pair whenever the tube is separated
- 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 PFS sealless drum pumps
- PFS drum pump reassembly after cleaning or repair
- Tracing a loss of discharge flow with no external 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: J100018
- Part Type: Viton Inner Tube O-Ring
- Material: Viton FKM fluoroelastomer
- Position: Inner tube joint
- Fits: Finish Thompson PFS sealless drum pumps
- Quantity Per Pump: 2
- Condition: New
Frequently Asked Questions
Q: Is a lubricant needed on assembly?
Only one known to suit the pumped chemical, and only a trace. The wrong grease can swell the ring as badly as the wrong elastomer.
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.
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 inner tube O-ring before you order.
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