Weinman Q26-395-Y6 Mechanical Seal 1.25 in Shaft
This is the mechanical seal Weinman lists as part Q26-395-Y6, sized for a 1.25 in shaft, with Special carbon, Ni-Resist and Viton components. The sealing happens across a lapped face pair so flat that the film of liquid between them is thinner than a human hair.
Nothing kills a mechanical seal faster than running dry. Without liquid between the faces the film is gone in seconds, friction spikes, and the carbon face heat-checks or the seat cracks. After that the seal drips and will keep dripping. Abrasives do the same job more slowly, scoring the faces until they no longer mate, and a hardened elastomer boot lets the rotating face stop tracking the shaft.
Handle the faces as though they were optical parts, because that is effectively what they are. Keep them clean, do not touch the lapped surfaces, and never lever the seal into place. The Special carbon, Ni-Resist and Viton build here fixes the chemical and temperature limits, so match the material as carefully as the size.
Key Features
- Genuine Weinman mechanical shaft seal assembly
- 1.25 in shaft - matches the original shaft dimension
- Special carbon, Ni-Resist and Viton construction
- Direct replacement for the original Weinman seal
- Spring loaded and self-adjusting as the faces wear
- Supplied complete - rotating face, seat and elastomers
Applications
- Weinman pump rebuilds and overhauls
- Curing a persistent drip from behind the pump casing
- Recovery after a dry run or a lost prime
- Replacing seal faces scored by grit or abrasives
- Planned maintenance on duty and standby pumps
- Industrial, marine and dockside pump installations
Specifications
- Brand: Weinman
- Manufacturer: Crane Pumps and Systems
- Manufacturer Part Number: Q26-395-Y6
- Part Type: Mechanical shaft seal
- Material: Special carbon, Ni-Resist and Viton
- Size: 1.25 in shaft
- Condition: New
Frequently Asked Questions
Q: Should anything else be changed at the same time?
Check the shaft or sleeve where the elastomer grips it. A groove worn at the old seal position will chew the new boot in short order. The casing joint seal is also worth renewing, since it has to come off to reach the seal anyway.
Q: How long should a mechanical seal last?
Years on clean liquid with a flooded suction. Life falls sharply with abrasives, with frequent starts on a starved inlet, and with temperatures near the top of the elastomer rating. Most premature failures trace back to operating conditions rather than the seal itself.
Q: A few drops appear when the pump first starts. Is that normal?
A very light initial weep while the faces bed in can settle within an hour or so of running. A steady drip, or anything that continues beyond that, means the faces are not seating and the seal needs to come back out.
Q: How do I know the seal is what is leaking?
A shaft seal leak shows up as liquid finding its way out around the shaft behind the casing, often worst just after shutdown. A joint gasket leaks along the split line between castings and does not change with shaft rotation.
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
