Oil seal CSLBK 12x25x7 PTFE

The CSLBK shaft seal is designed for use on rotary shafts in screw compressors and other rotating machinery. It is a single lip rotary shaft seal (CSL – Single Lip) with a sealing lip made of polytetrafluoroethylene (PTFE), offering very low friction and excellent chemical resistance to oils, compressed air, condensates and other media commonly found in compressor systems. The outer housing is made of stainless steel, ensuring corrosion resistance and dimensional stability during press-fit installation.

The seal is press fitted into the receiving bore. It is recommended to apply a sealing compound (e.g. Loctite 601 or 641) to the outer diameter to ensure a leak-free fit. A conical installation tool should be used to protect the PTFE sealing lip during fitting.

• Profile type: CSLBK (single lip)
• Inner diameter (d): 12 mm / 0.472"
• Outer diameter (D): 25 mm / 0.984"
• Width (H): 7 mm / 0.276"
• Sealing lip material: PTFE (polytetrafluoroethylene)
• Housing material: stainless steel
• Operating temperature range: -90°C to +260°C
• Max. shaft speed: 30 m/s
• Max. operating pressure: 1.5 MPa
• Typical applications: screw compressors, pumps, mixers, blowers, rotary shaft systems
• OEM code: 48003888
• SKU: 30950

The 12×25×7 dimension is listed in the manufacturer's standard size table, making it straightforward to source a replacement. The seal is also suitable for use on unhardened shafts.