Burks 09813-C Mechanical Seal 0.750 in Shaft
The Burks 09813-C seals the shaft where it leaves the pump casing. It is a mechanical face seal using Carbon, ceramic and Viton, for a 0.750 in shaft - a spring-loaded rotating face running against a stationary seat, self-adjusting as the faces wear.
A mechanical seal is a wear part with a finite life. The carbon face is sacrificial and slowly gives itself up against the harder seat, and the spring takes up the wear until it runs out of travel. What ends most seals early, though, is a dry start, a starved suction line, or grit carried through the faces. The warning is usually a drip that appears after shutdown and then becomes constant.
Shaft size and elastomer both have to match. This seal is built for a 0.750 in shaft, and the Carbon, ceramic and Viton specification sets the temperature range and the liquids it will tolerate. Burks lists the same shaft size in several compounds, so confirm both before ordering.
Key Features
- Genuine Burks mechanical shaft seal assembly
- 0.750 in shaft - matches the original shaft dimension
- Carbon, ceramic and Viton construction
- Direct replacement for the original Burks seal
- Spring loaded and self-adjusting as the faces wear
- Supplied complete - rotating face, seat and elastomers
Applications
- Burks 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: Burks
- Manufacturer: Crane Pumps and Systems
- Manufacturer Part Number: 09813-C
- Part Type: Mechanical shaft seal
- Material: Carbon, ceramic and Viton
- Size: 0.750 in shaft
- Condition: New
Frequently Asked Questions
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.
Q: What ruins a new seal fastest?
Running the pump dry, even briefly. The faces depend on a thin liquid film for both lubrication and cooling, and seconds without it can heat-check the carbon. Close behind that are grit in the liquid and an elastomer that is wrong for the chemistry.
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.
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