Finish Thompson J100991 Viton Discharge O-Ring
The J100991 is the viton discharge o-ring used in Finish Thompson PFM, PFP and PFV drum pumps. It seals the discharge connection at the top of the pump where the spout or hose fitting attaches. It is built in Viton FKM fluoroelastomer, which is what decides where it can safely be used.
Treat it as a service item rather than a permanent fitting. It is the ring most often blamed for a drip at the outlet, and because it is disturbed whenever the spout is changed it should be renewed each time. 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
- Viton Discharge O-Ring in Viton FKM fluoroelastomer built to the original factory specification
- Viton FKM seal for the pump discharge connection
- Renewable every time the spout or fitting is changed
- 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 dispensing setups with changeable fittings
- Curing a weep at the pump outlet
- 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: J100991
- Part Type: Viton Discharge O-Ring
- Material: Viton FKM fluoroelastomer
- Position: Discharge outlet
- Fits: Finish Thompson PFM, PFP and PFV drum pumps
- Quantity Per Pump: 1
- Condition: New
Frequently Asked Questions
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.
Q: How should spare rings be stored?
Cool, dark and away from electric motors, because sunlight and ozone age rubber long before it ever reaches the pump.
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.
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 discharge O-ring before you order.
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