Jabsco 18753-0249BC Mechanical Seal Head, Nitrile and Carbon
The Jabsco 18753-0249BC is the mechanical seal head in nitrile with a carbon rotary face, an alternative material version of the Jabsco 18753-0249 seal head. It lets you match the elastomer and face material to the liquid being pumped while keeping the same fit as the original. Jabsco uses this part number on specific models only, so match it against the parts list for the model number on your pump plate before ordering.
A mechanical seal stops liquid leaking along the turning shaft by running a rotating face against a stationary seat. The two faces are lapped very flat, so handle them by the edges, keep them clean and never let the pump run dry, because the faces rely on the liquid for cooling and lubrication. Replace the seal head and seat as a matched pair, and check the shaft for wear or scoring where the elastomer grips it.
Key Features
- Mechanical shaft seal
- Lapped sealing faces
- Stainless steel spring and retainer
- Elastomer bellows grips the shaft
- Stops leaks along the shaft
Applications
- Jabsco industrial flexible impeller pumps
- Replacing a leaking shaft seal
- Chemical and process transfer
- Food, beverage and general transfer
- Pump overhauls
Specifications
- Brand: Jabsco
- Manufacturer Part Number: 18753-0249BC
- Part Type: Mechanical seal head only
- Rotary Face: Carbon
- Elastomer: Nitrile
- Spring and Retainer: 18-8 stainless steel
- Size: Same as Jabsco 18753-0249
- Requires: Matching stationary seat
- Fits: Specific Jabsco models, confirm against your pump plate
- Quantity Needed: One per pump
- Condition: New
Frequently Asked Questions
Q: Why do mechanical seals fail?
Running dry, grit in the liquid and a worn or scored shaft are the most common causes.
Q: How do I fit it without damage?
Keep the faces clean, handle them by the edges and lubricate the shaft lightly so the bellows slides on easily.
Q: Which face material should I choose?
Carbon suits clean liquids, while tungsten carbide and silicon carbide stand up better to abrasives.
Q: Which elastomer should I choose?
Nitrile suits oils, FKM suits many chemicals and heat, and EPDM suits hot water and many cleaners.
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.
CLRMarine
