Finish Thompson J100249 Viton Inner Tube O-Ring
Finish Thompson supplies the J100249 as the viton inner tube o-ring for PFM, PFP and PFV drum pumps. It seals the joint between sections of the inner tube so that pumped fluid stays inside the discharge path. 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 failed inner tube seal lets fluid escape into the outer tube rather than out of the spout, and the pump then seems to have lost flow for no visible reason. 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 inner tube joint
- Keeps the discharge path sealed along the pump tube
- 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 PFM, PFP and PFV drum pumps
- Drum pump rebuilds and tube reassembly
- Tracing an unexplained loss of discharge flow
- 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: J100249
- Part Type: Viton Inner Tube O-Ring
- Material: Viton FKM fluoroelastomer
- Position: Inner tube joint
- Fits: Finish Thompson PFM, PFP and PFV 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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