Bore-Sealing Spring-Loaded Rotary Shaft Seals with Wiper Lip
Ribbed Buna-N over steel creates a tight seal with the bore, even when mating with a rough surface or in a split housing. Also known as oil seals, these retain oil on rotating shafts in motors, pumps, bearings, and gearboxes. They have a secondary lip that blocks contaminants and a spring that secures the sealing-lip to prevent leaks. Press-fit seals into the bore around the shaft. Seals with a maximum pressure of 145 psi should be secured with a retaining ring.
Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.
For Bore | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia., mm | Dia., mm | Min. Wd., mm | Max. Speed, rpm | Max. Pressure, psi | Temp. Range, °F | Hardness | Color | Specifications Met | Each | |
Buna-N Rubber with Steel Core and Spring | ||||||||||
| 25 | 35 | 7.3 | 10,500 | 7 | -40° to 210° | Durometer 75A (Hard) | Gray | DIN 3760, ISO 6194 | 0000000 | 00000 |
| 25 | 38 | 7.3 | 10,500 | 7 | -40° to 210° | Durometer 75A (Hard) | Gray | DIN 3760, ISO 6194 | 0000000 | 0000 |
| 25 | 40 | 7.3 | 10,500 | 7 | -40° to 210° | Durometer 75A (Hard) | Gray | DIN 3760, ISO 6194 | 0000000 | 0000 |
| 25 | 47 | 7.3 | 10,600 | 7 | -40° to 210° | Durometer 75A (Hard) | Gray | DIN 3760, ISO 6194 | 00000000 | 0000 |
| 25 | 52 | 8.3 | 10,500 | 7 | -40° to 210° | Durometer 75A (Hard) | Gray | DIN 3760, ISO 6194 | 0000000 | 0000 |
Spring-Loaded Rotary Shaft Seals with Wiper Lip
Used to retain oil on rotating shafts in motors, pumps, bearings, and gearboxes, these seals have a secondary lip that blocks contaminants. Also known as oil seals, a spring secures the lip against the shaft, preventing messy leaks. Press-fit seals into the bore around the shaft. Seals with a maximum pressure of 50 psi should be secured with a retaining ring.
Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.
For Bore | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia., mm | Dia., mm | Min. Wd., mm | Max. Speed, rpm | Max. Pressure, psi | Temp. Range, °F | Hardness | Color | Specifications Met | Each | |
Buna-N Rubber with Steel Case and Spring | ||||||||||
| 25 | 40 | 7.3 | 7,600 | 7 | -20° to 212° | Durometer 70A (Hard) | Black | DIN 3761, ISO 6194 | 00000000 | 00000 |
| 25 | 47 | 7.3 | 7,600 | 7 | -20° to 212° | Durometer 70A (Hard) | Black | DIN 3761, ISO 6194 | 00000000 | 0000 |
| 25 | 52 | 7.3 | 7,600 | 7 | -20° to 212° | Durometer 70A (Hard) | Black | DIN 3761, ISO 6194 | 00000000 | 0000 |
Spring-Loaded Rotary Shaft Seals
Also known as oil seals, use these to retain oil on rotating shafts in motors, pumps, bearings, and gearboxes. A spring secures the lip against the shaft, preventing messy leaks. Press-fit seals into the bore around the shaft.
Seals with an acrylic-coated case have a coating that compensates for surface imperfections in the housing bore for a tight seal on the OD.
Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.
For Bore | Case | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia., mm | Dia., mm | Min. Wd., mm | Max. Speed, rpm | Max. Pressure, psi | Temp. Range, °F | Hardness | Color | Finish | Color | Specifications Met | Each | |
Buna-N Rubber with Steel Case and Spring | ||||||||||||
| 25 | 35 | 7.3 | 3,800 | 10 | -40° to 210° | Durometer 75A (Hard) | Black | Acrylic Coated | Green | DIN 3760, ISO 6194 | 0000000 | 00000 |
| 25 | 38 | 7.3 | 3,800 | 10 | -40° to 210° | Durometer 75A (Hard) | Black | Acrylic Coated | Green | DIN 3760, ISO 6194 | 0000000 | 00000 |
| 25 | 40 | 7.3 | 3,800 | 10 | -40° to 210° | Durometer 75A (Hard) | Black | Acrylic Coated | Green | DIN 3760, ISO 6194 | 0000000 | 00000 |
| 25 | 52 | 8.3 | 3,800 | 10 | -40° to 210° | Durometer 75A (Hard) | Black | Acrylic Coated | Green | DIN 3760, ISO 6194 | 0000000 | 00000 |
Rotary Shaft Seals for Grease
Also known as grease seals, these are designed to retain thick lubricant at low pressure in motors, pumps, bearings, and gearboxes. They have a light grip on the shaft that creates less friction than spring-loaded seals. Press-fit seals into the bore around the shaft.
Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.
Mechanical Pump Shaft Seals with Extended Spring
For use in waste water, boiler feed, and compressor pumps, these seals have an extra-long spring that accommodates variations in seal cavity length. They come furnished as two pieces—the seal and the seat. The seal is comprised of the case, spring, diaphragm, and washer, which come locked together as one piece. Seal Width represents the working height, which is the compressed length when installed. The seat is comprised of the seat and the gasket. Products cannot be sold outside North America due to restrictions.
Buna-N diaphragms and gaskets resist grease and a wide range of oils.
EPDM diaphragms are more resistant to water and steam than Buna-N and Viton® fluoroelastomer, but aren’t as resistant to oils and chemicals.
Carbon washers are for use with clean liquids.
Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.
Seal | Seat | Material | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia., mm | Manufacturer/ Brand Equivalent | ID, mm | OD, mm | Wd., mm | ID, mm | OD, mm | Wd., mm | Washer | Seat | Spring Shape | Includes | Max. Pressure, psi | Cannot Be Sold To | Each | |
304 Stainless Steel Case and Spring with Buna-N Rubber Diaphragm and Gasket | |||||||||||||||
| 25 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 25.000 | 39.200 | 25.500 | 26.500 | 41.250 | 11.000 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 000000 |
304 Stainless Steel Case and Spring with EPDM Rubber Diaphragm and Gasket | |||||||||||||||
| 25 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 25.000 | 39.200 | 25.500 | 26.500 | 41.250 | 11.000 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
Cartridge Mechanical Seals
Install these seals faster and with less technical expertise than other mechanical shaft seals that come in two pieces. They come with their seal and seat already assembled. All have a carbon washer that is self-lubricating. However, this means their washer is too soft to be used with abrasive liquids and liquids with harsh additives.
Seals with a fluoroelastomer diaphragm can be used with a wider range of chemicals than EPDM diaphragms, including benzene, butyl alcohol, and fuels.
Seals with an EPDM diaphragm won’t break down from exposure to water and steam. However, they are for use with fewer chemicals.