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Shaft Diameter
Seal ID
For Use With
Seat OD
Manufacturer/Brand Equivalent
Seal Width
Seat Material
Diaphragm Material
Spring Material
Seat Width
Washer Material
Case Material
Seat ID
Export Control Classification Number (ECCN)
DFARS Specialty Metals
Diaphragm Hardness Rating
Mechanical Pump Shaft Seals with Extended Spring
Seal with Retainer and Straight Spring
Seal with Conical Spring
Seal with Straight 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.
Viton® fluoroelastomer diaphragms and gaskets resist a wider range of chemicals than Buna-N.
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.
Silicon carbide washers have a hard surface that resists scratching, so they can be used with liquids that contain abrasives.
Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.
For technical drawings and 3-D models, click on a part number.
Inch
Seal | Seat | Material | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia. | Manufacturer Equivalent Number | Manufacturer/ Brand Equivalent | ID | OD | Wd. | ID | OD | Wd. | 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 | ||||||||||||||||
| 1/2" | 168 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 0.500" | 0.915" | 0.812" | 0.535" | 1.000" | 0.312" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 0000000 | 000000 |
| 1/2" | 392, 401A, 1012 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 0.500" | 0.930" | 0.750" | 0.546" | 0.934" | 0.237" | Carbon | Ceramic | Straight | Spring Retainer | 400 | Outside North America | 00000000 | 00000 |
| 1/2" | 631 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 0.500" | 0.915" | 0.812" | 0.535" | 1.000" | 0.312" | Phenolic Plastic | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 0000000 | 00000 |
| 5/8" | 274 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 0.625" | 1.180" | 1.312" | 0.671" | 1.250" | 0.406" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 5/8" | 290 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 0.625" | 1.121" | 0.875" | 0.671" | 1.250" | 0.406" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 5/8" | 359 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 0.625" | 1.180" | 0.875" | 0.671" | 1.250" | 0.406" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 5/8" | 508 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 0.625" | 1.177" | 0.875" | 0.671" | 1.250" | 0.406" | Carbon | Ceramic | Conical | __ | 250 | Outside North America | 00000000 | 00000 |
| 5/8" | 800 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 0.625" | 1.111" | 1.312" | 0.671" | 1.148" | 0.315" | Carbon | Ceramic | Straight | __ | 250 | Outside North America | 00000000 | 00000 |
| 3/4" | 358 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 0.750" | 1.302" | 0.875" | 0.780" | 1.375" | 0.406" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 3/4" | 107165 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 0.750" | 1.302" | 0.687" | 0.783" | 1.287" | 0.252" | Carbon | Ceramic | Straight | __ | 250 | Outside North America | 00000000 | 00000 |
| 7/8" | 703 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 0.875" | 1.400" | 0.937" | 0.921" | 1.500" | 0.406" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 1" | 235 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.000" | 1.552" | 1.000" | 1.031" | 1.625" | 0.437" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 1 1/8" | 356 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.125" | 1.753" | 1.062" | 1.156" | 1.750" | 0.438" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 1 1/4" | 185 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.250" | 1.878" | 1.062" | 1.291" | 1.875" | 0.437" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 1 1/4" | 381 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.250" | 1.990" | 1.062" | 1.291" | 1.875" | 0.437" | Carbon | Ceramic | Conical | __ | 250 | Outside North America | 00000000 | 00000 |
| 1 1/4" | 466 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.250" | 1.878" | 1.062" | 1.291" | 2.000" | 0.437" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 1 1/4" | 756 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.250" | 1.878" | 1.062" | 1.291" | 1.875" | 0.437" | Carbon | Gray Iron | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 1 1/4" | 976 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.250" | 1.990" | 1.062" | 1.290" | 1.768" | 0.367" | Carbon | Ceramic | Conical | __ | 250 | Outside North America | 00000000 | 00000 |
| 1 3/8" | 177 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.375" | 2.001" | 1.125" | 1.411" | 2.000" | 0.437" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 1 1/2" | 758 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.500" | 2.124" | 1.125" | 1.546" | 2.125" | 0.437" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 1 5/8" | 238 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.625" | 2.424" | 1.375" | 1.663" | 2.375" | 0.500" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 1 3/4" | 237, 446 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.750" | 2.446" | 1.375" | 1.796" | 2.500" | 0.500" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 1 7/8" | 340 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.875" | 2.519" | 1.500" | 1.927" | 2.625" | 0.500" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 2" | 267 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 2.000" | 2.724" | 1.500" | 2.055" | 2.750" | 0.500" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
304 Stainless Steel Case and Spring with Viton® Fluoroelastomer Rubber Diaphragm and Gasket | ||||||||||||||||
| 1/2" | 168V | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 0.500" | 0.915" | 0.812" | 0.535" | 1.000" | 0.312" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 0000000 | 00000 |
| 5/8" | 359V | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 0.625" | 1.180" | 0.875" | 0.671" | 1.250" | 0.406" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 0000000 | 00000 |
| 5/8" | 359VSC | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 0.625" | 1.180" | 0.875" | 0.671" | 1.250" | 0.406" | Silicon Carbide | Silicon Carbide | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 3/4" | 358V, 750V | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 0.750" | 1.302" | 0.875" | 0.780" | 1.375" | 0.406" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 3/4" | 877V | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 0.750" | 1.302" | 0.797" | 0.780" | 1.375" | 0.406" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 0000000 | 00000 |
| 7/8" | 309VSC | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 0.875" | 1.422" | 0.937" | 0.921" | 1.500" | 0.406" | Silicon Carbide | Silicon Carbide | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 7/8" | 703V | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 0.875" | 1.422" | 0.937" | 0.921" | 1.500" | 0.406" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 0000000 | 00000 |
| 1" | 235V | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.000" | 1.552" | 1.000" | 1.031" | 1.625" | 0.437" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 0000000 | 00000 |
| 1" | 235VSC | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.000" | 1.552" | 1.000" | 1.031" | 1.625" | 0.437" | Silicon Carbide | Silicon Carbide | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 1" | 245V | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.000" | 1.700" | 1.000" | 1.031" | 1.625" | 0.437" | Carbon | Ceramic | Conical | __ | 150 | Outside North America | 00000000 | 00000 |
| 1 1/8" | 356V | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.125" | 1.753" | 1.062" | 1.161" | 1.750" | 0.437" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 0000000 | 00000 |
| 1 1/8" | 356VSC | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.125" | 1.753" | 1.062" | 1.156" | 1.750" | 0.437" | Silicon Carbide | Silicon Carbide | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 000000 |
| 1 1/4" | 185V | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.250" | 1.878" | 1.062" | 1.291" | 1.875" | 0.437" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 1 1/4" | 185VSC | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.250" | 1.878" | 1.062" | 1.291" | 1.875" | 0.437" | Silicon Carbide | Silicon Carbide | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 000000 |
| 1 3/8" | 177V | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.375" | 2.001" | 1.125" | 1.411" | 2.000" | 0.437" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 0000000 | 00000 |
| 1 3/8" | 177VSC | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.375" | 2.001" | 1.125" | 1.415" | 2.000" | 0.437" | Silicon Carbide | Silicon Carbide | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 000000 |
| 1 1/2" | 758V | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.500" | 2.124" | 1.125" | 1.546" | 2.125" | 0.437" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 0000000 | 00000 |
| 1 1/2" | 758VSC | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.500" | 2.124" | 1.125" | 1.546" | 2.125" | 0.437" | Silicon Carbide | Silicon Carbide | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 000000 |
| 1 1/2" | 11558V | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.500" | 2.320" | 1.093" | 1.546" | 2.125" | 0.437" | Carbon | Ceramic | Conical | __ | 250 | Outside North America | 0000000 | 00000 |
| 1 5/8" | 238V | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.625" | 2.424" | 1.375" | 1.663" | 2.375" | 0.500" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 0000000 | 00000 |
| 1 5/8" | 238VXFX | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.625" | 2.424" | 1.375" | 1.671" | 2.375" | 0.500" | Silicon Carbide | Silicon Carbide | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 000000 |
| 1 3/4" | 237V | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.750" | 2.446" | 1.375" | 1.796" | 2.500" | 0.500" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 000000 | 00000 |
| 1 3/4" | 237VSC | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.750" | 2.446" | 1.375" | 1.796" | 2.500" | 0.500" | Silicon Carbide | Silicon Carbide | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 000000 |
| 1 7/8" | 340V | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.875" | 2.519" | 1.500" | 1.927" | 2.625" | 0.500" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 0000000 | 000000 |
| 2" | 267V | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 2.000" | 2.724" | 1.500" | 2.055" | 2.750" | 0.500" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 0000000 | 000000 |
304 Stainless Steel Case and Spring with EPDM Rubber Diaphragm and Gasket | ||||||||||||||||
| 1/2" | 168E | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 0.500" | 0.915" | 0.812" | 0.535" | 1.000" | 0.312" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 5/8" | 359E | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 0.625" | 1.180" | 0.875" | 0.671" | 1.250" | 0.406" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 3/4" | 358E | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 0.750" | 1.302" | 0.875" | 0.780" | 1.375" | 0.406" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 0000000 | 00000 |
| 7/8" | 703E | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 0.875" | 1.422" | 0.937" | 0.921" | 1.500" | 0.406" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 1" | 235E | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.000" | 1.552" | 1.000" | 1.031" | 1.625" | 0.437" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 1 1/8" | 356E | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.125" | 1.753" | 1.062" | 1.161" | 1.750" | 0.439" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 1 1/4" | 185E | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.250" | 1.878" | 1.062" | 1.291" | 1.875" | 0.437" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 1 3/8" | 177E | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.375" | 2.001" | 1.125" | 1.411" | 2.000" | 0.437" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 1 1/2" | 758E | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.500" | 2.124" | 1.125" | 1.546" | 2.125" | 0.437" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 1 5/8" | 238E | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.625" | 2.446" | 1.375" | 1.663" | 2.375" | 0.500" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 1 3/4" | 237E | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.750" | 2.446" | 1.312" | 1.796" | 2.500" | 0.500" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 1 7/8" | 340E | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 1.875" | 2.519" | 1.500" | 1.927" | 2.625" | 0.500" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 000000 |
| 2" | 267E | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 2.000" | 2.724" | 1.500" | 2.055" | 2.750" | 0.500" | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 000000 |
Metric
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 | |||||||||||||||
| 12 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 12.000 | 23.500 | 20.500 | 14.700 | 25.500 | 8.000 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 000000 |
| 13 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 13.000 | 23.500 | 20.500 | 14.700 | 25.500 | 8.000 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 14 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 14.000 | 27.000 | 22.250 | 17.100 | 31.750 | 10.250 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 15 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 15.000 | 27.000 | 22.250 | 17.100 | 31.750 | 10.250 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 16 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 16.000 | 27.000 | 22.250 | 17.100 | 31.750 | 10.250 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 17 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 17.000 | 27.000 | 22.250 | 19.700 | 35.000 | 10.250 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 18 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 18.000 | 30.700 | 22.250 | 19.700 | 35.000 | 10.250 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 20 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 20.000 | 33.400 | 23.750 | 23.900 | 38.000 | 10.250 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 0000000 | 00000 |
| 22 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 22.000 | 33.400 | 23.750 | 23.900 | 38.000 | 10.250 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 24 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 24.000 | 39.200 | 25.500 | 26.500 | 41.250 | 11.000 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 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 |
| 28 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 28.000 | 45.600 | 27.000 | 30.680 | 44.500 | 11.000 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 30 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 30.000 | 47.400 | 27.000 | 34.100 | 47.750 | 11.000 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 32 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 32.000 | 47.400 | 27.000 | 34.100 | 47.750 | 11.000 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 33 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 33.000 | 52.000 | 28.500 | 37.100 | 50.750 | 11.000 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 35 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 35.000 | 52.000 | 28.500 | 37.100 | 50.750 | 11.000 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 45 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 45.000 | 65.100 | 38.000 | 47.100 | 63.500 | 12.750 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 000000 |
| 50 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 50.000 | 71.000 | 38.000 | 51.900 | 69.750 | 12.750 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 000000 |
304 Stainless Steel Case and Spring with Viton® Fluoroelastomer Rubber Diaphragm and Gasket | |||||||||||||||
| 12 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 12.000 | 23.500 | 20.500 | 14.700 | 25.500 | 8.000 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 13 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 13.000 | 23.500 | 20.500 | 14.700 | 25.500 | 8.000 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 15 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 15.000 | 27.000 | 22.250 | 17.100 | 31.750 | 10.250 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 16 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 16.000 | 27.000 | 22.250 | 17.100 | 31.750 | 10.250 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 17 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 17.000 | 27.000 | 22.250 | 19.700 | 35.000 | 10.250 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 20 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 20.000 | 33.400 | 23.750 | 23.900 | 38.000 | 10.250 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 22 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 22.000 | 33.400 | 23.750 | 23.900 | 38.000 | 10.250 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 24 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 24.000 | 39.200 | 25.500 | 26.500 | 41.250 | 11.000 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 28 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 28.000 | 45.600 | 27.000 | 30.680 | 44.500 | 11.000 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 30 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 30.000 | 47.400 | 27.000 | 34.100 | 47.750 | 11.000 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 32 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 32.000 | 47.400 | 27.000 | 34.100 | 47.750 | 11.000 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 0000000 | 00000 |
| 35 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 35.000 | 52.000 | 28.500 | 37.100 | 50.750 | 11.000 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 0000000 | 00000 |
| 40 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 40.000 | 59.200 | 35.000 | 43.360 | 60.250 | 12.750 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 000000 |
304 Stainless Steel Case and Spring with EPDM Rubber Diaphragm and Gasket | |||||||||||||||
| 12 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 12.000 | 23.500 | 20.500 | 14.700 | 25.500 | 8.000 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 16 | John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short | 16.000 | 27.000 | 22.250 | 17.100 | 31.750 | 10.250 | Carbon | Ceramic | Straight | Spring Retainer | 250 | Outside North America | 00000000 | 00000 |
| 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 |
Narrow-Profile Mechanical Pump Shaft Seals with Extended Spring
With a smaller seal OD than standards seals, these seals have an extended spring that accommodates variations in seal cavity length. They're used in waste water, boiler feed, and compressor pumps. Seals 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.
Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.
For technical drawings and 3-D models, click on a part number.
Seal | Seat | Material | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia. | Manufacturer Equivalent Number | Manufacturer/ Brand Equivalent | ID | OD | Wd. | ID | OD | Wd. | Washer | Seat | Max. Pressure, psi | Cannot Be Sold To | Each | |
316 Stainless Steel Case and Spring with Buna-N Rubber Diaphragm and Gasket | ||||||||||||||
| 3/4" | 275 | John Crane Type 1 Pac-Seal Type 51 Sealol Type 43 CE Long | 0.750" | 1.199" | 1.312" | 0.780" | 1.375" | 0.406" | Carbon | Ceramic | 150 | Outside North America | 00000000 | 000000 |
| 7/8" | 188 | John Crane Type 1 Pac-Seal Type 51 Sealol Type 43 CE Long | 0.875" | 1.324" | 1.375" | 0.921" | 1.500" | 0.406" | Carbon | Ceramic | 150 | Outside North America | 00000000 | 00000 |
| 1" | 754 | John Crane Type 1 Pac-Seal Type 51 Sealol Type 43 CE Long | 1.000" | 1.449" | 1.562" | 1.031" | 1.625" | 0.437" | Carbon | Ceramic | 150 | Outside North America | 00000000 | 00000 |
| 1 1/8" | 204 | John Crane Type 1 Pac-Seal Type 51 Sealol Type 43 CE Long | 1.125" | 1.562" | 1.625" | 1.161" | 1.750" | 0.437" | Carbon | Ceramic | 150 | Outside North America | 00000000 | 00000 |
| 1 1/4" | 361 | John Crane Type 1 Pac-Seal Type 51 Sealol Type 43 CE Long | 1.250" | 1.687" | 1.625" | 1.291" | 1.875" | 0.437" | Carbon | Ceramic | 150 | Outside North America | 00000000 | 00000 |
| 1 3/8" | 354 | John Crane Type 1 Pac-Seal Type 51 Sealol Type 43 CE Long | 1.375" | 1.825" | 1.687" | 1.415" | 2.000" | 0.437" | Carbon | Ceramic | 150 | Outside North America | 00000000 | 00000 |
| 1 1/2" | 305 | John Crane Type 1 Pac-Seal Type 51 Sealol Type 43 CE Long | 1.500" | 1.949" | 1.687" | 1.546" | 2.125" | 0.437" | Carbon | Ceramic | 150 | Outside North America | 00000000 | 00000 |
| 1 5/8" | 745 | John Crane Type 1 Pac-Seal Type 51 Sealol Type 43 CE Long | 1.625" | 2.125" | 2.000" | 1.671" | 2.375" | 0.500" | Carbon | Ceramic | 150 | Outside North America | 00000000 | 000000 |
| 1 3/4" | 205 | John Crane Type 1 Pac-Seal Type 51 Sealol Type 43 CE Long | 1.750" | 2.300" | 2.000" | 1.796" | 2.500" | 0.500" | Carbon | Ceramic | 150 | Outside North America | 00000000 | 000000 |
| 1 7/8" | 523 | John Crane Type 1 Pac-Seal Type 51 Sealol Type 43 CE Long | 1.875" | 2.437" | 2.125" | 1.927" | 2.625" | 0.500" | Carbon | Ceramic | 150 | Outside North America | 00000000 | 000000 |
316 Stainless Steel Case and Spring with Viton® Fluoroelastomer Rubber Diaphragm and Gasket | ||||||||||||||
| 1" | 754V | John Crane Type 1 Pac-Seal Type 51 Sealol Type 43 CE Long | 1.000" | 1.449" | 1.562" | 1.031" | 1.625" | 0.437" | Carbon | Ceramic | 150 | Outside North America | 00000000 | 00000 |
| 1 1/4" | 361V | John Crane Type 1 Pac-Seal Type 51 Sealol Type 43 CE Long | 1.250" | 1.687" | 1.625" | 1.291" | 1.875" | 0.437" | Carbon | Ceramic | 150 | Outside North America | 00000000 | 00000 |
| 1 3/8" | 354V | John Crane Type 1 Pac-Seal Type 51 Sealol Type 43 CE Long | 1.375" | 1.825" | 1.687" | 1.415" | 2.000" | 0.437" | Carbon | Ceramic | 150 | Outside North America | 00000000 | 000000 |
| 1 3/4" | 205V | John Crane Type 1 Pac-Seal Type 51 Sealol Type 43 CE Long | 1.750" | 2.300" | 2.000" | 1.796" | 2.500" | 0.500" | Carbon | Ceramic | 150 | Outside North America | 00000000 | 000000 |
Mechanical Pump Shaft Seals
Commonly used in well, sump, and displacement pumps, these seals have a two-piece spring-loaded design that keeps the sealing surfaces in contact as the material wears. Seals 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.
Viton® fluoroelastomer diaphragms and gaskets resist a wider range of chemicals than Buna-N.
Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.
For technical drawings and 3-D models, click on a part number.
Seal | Seat | Material | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia. | Manufacturer Equivalent Number | Manufacturer/ Brand Equivalent | ID | OD | Wd. | ID | OD | Wd. | Washer | Seat | Max. Pressure, psi | Cannot Be Sold To | Each | |
304 Stainless Steel Case and Spring with Buna-N Rubber Diaphragm and Gasket | ||||||||||||||
| 3/8" | 511 | John Crane Type 6 Pac-Seal Type 16 Sealol Type 60L | 0.375" | 0.917" | 0.625" | 0.421" | 0.875" | 0.218" | Phenolic Plastic | Gray Iron | 150 | Outside North America | 00000000 | 000000 |
| 1/2" | 162 | John Crane Type 6 Pac-Seal Type 16 Sealol Type 60L | 0.500" | 0.917" | 0.656" | 0.535" | 1.000" | 0.312" | Phenolic Plastic | Ceramic | 150 | Outside North America | 00000000 | 00000 |
| 1/2" | 60504 | John Crane Type 6 Pac-Seal Type 16 Sealol Type 60L | 0.500" | 0.921" | 0.656" | 0.535" | 1.000" | 0.312" | Carbon | Ceramic | 150 | Outside North America | 0000000 | 00000 |
| 5/8" | 100 | John Crane Type 6 Pac-Seal Type 16 Sealol Type 60L | 0.625" | 1.185" | 0.718" | 0.671" | 1.187" | 0.343" | Phenolic Plastic | Ceramic | 150 | Outside North America | 00000000 | 0000 |
| 5/8" | 501 | John Crane Type 6 Pac-Seal Type 16 Sealol Type 60L | 0.625" | 1.185" | 0.812" | 0.671" | 1.250" | 0.406" | Phenolic Plastic | Ceramic | 150 | Outside North America | 00000000 | 00000 |
| 5/8" | 516 | John Crane Type 6 Pac-Seal Type 16 Sealol Type 60L | 0.625" | 1.190" | 0.718" | 0.671" | 1.250" | 0.406" | Carbon | Ceramic | 150 | Outside North America | 0000000 | 00000 |
| 5/8" | 680 | John Crane Type 6 Pac-Seal Type 16 Sealol Type 60L | 0.625" | 1.185" | 0.718" | 0.671" | 1.187" | 0.281" | Carbon | Ceramic | 150 | Outside North America | 00000000 | 00000 |
| 3/4" | 101 | John Crane Type 6 Pac-Seal Type 16 Sealol Type 60L | 0.750" | 1.300" | 0.812" | 0.780" | 1.437" | 0.406" | Phenolic Plastic | Ceramic | 150 | Outside North America | 00000000 | 00000 |
| 3/4" | 851 | John Crane Type 6 Pac-Seal Type 16 Sealol Type 60L | 0.750" | 1.312" | 0.718" | 0.780" | 1.375" | 0.406" | Carbon | Ceramic | 150 | Outside North America | 0000000 | 00000 |
| 1" | 360 | John Crane Type 6 Pac-Seal Type 16 Sealol Type 60L | 1.000" | 1.552" | 0.812" | 1.031" | 1.625" | 0.437" | Phenolic Plastic | Ceramic | 150 | Outside North America | 00000000 | 00000 |
| 1" | 61004-PAC | John Crane Type 6 Pac-Seal Type 16 Sealol Type 60L | 1.000" | 1.552" | 0.812" | 1.062" | 1.625" | 0.433" | Carbon | Ceramic | 150 | Outside North America | 0000000 | 00000 |
304 Stainless Steel Case and Spring with Viton® Fluoroelastomer Rubber Diaphragm and Gasket | ||||||||||||||
| 5/8" | __ | John Crane Type 6 Pac-Seal Type 16 Sealol Type 60L | 0.625" | 1.185" | 0.718" | 0.671" | 1.250" | 0.406" | Phenolic Plastic | Ceramic | 150 | Outside North America | 0000000 | 00000 |
| 5/8" | 200V, 516V | John Crane Type 6 Pac-Seal Type 16 Sealol Type 60L | 0.625" | 1.190" | 0.718" | 0.671" | 1.250" | 0.406" | Carbon | Ceramic | 150 | Outside North America | 0000000 | 00000 |
| 5/8" | 606116 | John Crane Type 6 Pac-Seal Type 16 Sealol Type 60L | 0.625" | 1.190" | 0.718" | 0.671" | 1.250" | 0.406" | Silicon Carbide | Silicon Carbide | 150 | Outside North America | 0000000 | 00000 |
| 3/4" | 201V, 851V | John Crane Type 6 Pac-Seal Type 16 Sealol Type 60L | 0.750" | 1.300" | 0.718" | 0.780" | 1.375" | 0.406" | Phenolic Plastic | Ceramic | 150 | Outside North America | 0000000 | 00000 |
| 3/4" | 201VSC | John Crane Type 6 Pac-Seal Type 16 Sealol Type 60L | 0.750" | 1.312" | 0.718" | 0.797" | 1.375" | 0.406" | Silicon Carbide | Silicon Carbide | 150 | Outside North America | 0000000 | 00000 |
| 3/4" | 219V | John Crane Type 6 Pac-Seal Type 16 Sealol Type 60L | 0.750" | 1.302" | 0.718" | 0.780" | 1.375" | 0.406" | Carbon | Ceramic | 150 | Outside North America | 0000000 | 00000 |
| 1" | 360V | John Crane Type 6 Pac-Seal Type 16 Sealol Type 60L | 1.000" | 1.552" | 0.812" | 1.031" | 1.625" | 0.433" | Carbon | Ceramic | 150 | Outside North America | 0000000 | 00000 |
Mechanical Pump Shaft Seals with Compact Spring
Built for small circulation and dispensing pumps, these seals have short springs. The spring-loaded design keeps the sealing surfaces in contact as the material wears. Seals 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.
Viton® fluoroelastomer diaphragms and gaskets resist a wider range of chemicals than Buna-N.
Note: Maximum performance values cannot be achieved simultaneously. For example, speed is affected by pressure, temperature, and other operating conditions.
For technical drawings and 3-D models, click on a part number.
Seal | Seat | Material | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia. | Manufacturer Equivalent Number | Manufacturer/ Brand Equivalent | ID | OD | Wd. | ID | OD | Wd. | Washer | Seat | Max. Pressure, psi | Cannot Be Sold To | Each | |
304 Stainless Steel Case and Spring with Buna-N Rubber Diaphragm and Gasket | ||||||||||||||
| 5/8" | 409 | John Crane Type 6A Pac-Seal Type 68 Sealol Type 6 | 0.625" | 1.437" | 0.615" | 0.656" | 1.060" | 0.187" | Phenolic Plastic | Gray Iron | 75 | Outside North America | 0000000 | 000000 |
| 5/8" | 600 | John Crane Type 6A Pac-Seal Type 68 Sealol Type 6 | 0.625" | 1.437" | 0.615" | 0.671" | 1.187" | 0.343" | Phenolic Plastic | Ceramic | 75 | Outside North America | 0000000 | 00000 |
| 5/8" | 965 | John Crane Type 6A Pac-Seal Type 68 Sealol Type 6 | 0.625" | 1.437" | 0.615" | 0.671" | 1.250" | 0.406" | Carbon | Ceramic | 75 | Outside North America | 00000000 | 00000 |
| 5/8" | 1000 | John Crane Type 6A Pac-Seal Type 68 Sealol Type 6 | 0.625" | 1.437" | 0.615" | 0.671" | 1.250" | 0.406" | Phenolic Plastic | Ceramic | 75 | Outside North America | 00000000 | 00000 |
| 3/4" | 601 | John Crane Type 6A Pac-Seal Type 68 Sealol Type 6 | 0.750" | 1.575" | 0.615" | 0.780" | 1.375" | 0.406" | Phenolic Plastic | Ceramic | 75 | Outside North America | 00000000 | 00000 |
304 Stainless Steel Case and Spring with Viton® Fluoroelastomer Rubber Diaphragm and Gasket | ||||||||||||||
| 1/2" | 80509 | John Crane Type 6A Pac-Seal Type 68 Sealol Type 6 | 0.500" | 1.125" | 0.537" | 0.585" | 1.000" | 0.312" | Carbon | Ceramic | 75 | Outside North America | 0000000 | 00000 |
| 5/8" | 668V | John Crane Type 6A Pac-Seal Type 68 Sealol Type 6 | 0.625" | 1.437" | 0.615" | 0.671" | 1.250" | 0.406" | Carbon | Ceramic | 75 | Outside North America | 00000000 | 00000 |
| 3/4" | 601V | John Crane Type 6A Pac-Seal Type 68 Sealol Type 6 | 0.750" | 1.575" | 0.615" | 0.780" | 1.375" | 0.406" | Carbon | Ceramic | 75 | Outside North America | 00000000 | 00000 |
Heavy Duty Mechanical Pump Shaft Seals
Multiple internal springs ensure these seals keep the sealing surfaces in contact in demanding applications, such as agricultural, chemical, and mining pumps. Seals come furnished as two pieces—the seal and the seat. The seal is comprised of the case, springs, diaphragm, and washer, and the seat is comprised of the seat and the gasket. Seal Width represents the working height, which is the compressed length when installed. Products cannot be sold outside North America due to restrictions.
Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.
For technical drawings and 3-D models, click on a part number.
Seal | Seat | Material | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia. | Manufacturer/ Brand Equivalent | ID | OD | Wd. | ID | OD | Wd. | Washer | Seat | Max. Pressure, psi | Cannot Be Sold To | Each | |
316 Stainless Steel Case and Spring with Viton® Fluoroelastomer Rubber Diaphragm and Gasket | |||||||||||||
| 5/8" | John Crane Type 8T Pac-Seal Type 8T | 0.625" | 1.062" | 0.937" | 0.661" | 1.250" | 0.406" | Carbon | Ceramic | 300 | Outside North America | 0000000 | 0000000 |
| 3/4" | John Crane Type 8T Pac-Seal Type 8T | 0.750" | 1.187" | 0.937" | 0.781" | 1.375" | 0.406" | Carbon | Ceramic | 300 | Outside North America | 0000000 | 000000 |
| 1" | John Crane Type 8T Pac-Seal Type 8T | 1.000" | 1.437" | 1.000" | 1.064" | 1.625" | 0.437" | Carbon | Ceramic | 300 | Outside North America | 0000000 | 000000 |
| 1 1/4" | John Crane Type 8T Pac-Seal Type 8T | 1.250" | 1.687" | 1.000" | 1.281" | 1.875" | 0.437" | Carbon | Ceramic | 300 | Outside North America | 0000000 | 000000 |
| 1 1/2" | John Crane Type 8T Pac-Seal Type 8T | 1.500" | 1.937" | 1.125" | 1.546" | 2.125" | 0.437" | Carbon | Silicon Carbide | 300 | Outside North America | 0000000 | 00000000 |
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.
For technical drawings and 3-D models, click on a part number.
Seal | Fluoroelastomer Rubber Diaphragm | EPDM Rubber Diaphragm | ||||||
|---|---|---|---|---|---|---|---|---|
| For Shaft Dia. | ID | OD | Wd. | Max Pressure, psi | Each | Each | ||
316 Stainless Steel Case and C276 Nickel Spring with PTFE Plastic Gasket | ||||||||
| 1" | 1" | 2.626" | 2.736" | 220 | 0000000 | 000000000 | 0000000 | 000000000 |
| 1 1/8" | 1.125" | 2.752" | 2.736" | 220 | 0000000 | 00000000 | 0000000 | 00000000 |
| 1 1/4" | 1.25" | 2.874" | 2.736" | 220 | 0000000 | 00000000 | 0000000 | 00000000 |
| 1 3/8" | 1.375" | 3.063" | 2.736" | 220 | 0000000 | 00000000 | 0000000 | 00000000 |
| 1 1/2" | 1.5" | 3.437" | 2.815" | 220 | 0000000 | 00000000 | 0000000 | 00000000 |
| 1 5/8" | 1.625" | 3.437" | 2.815" | 220 | 0000000 | 00000000 | 0000000 | 00000000 |
| 1 3/4" | 1.75" | 3.563" | 2.815" | 220 | 0000000 | 00000000 | 0000000 | 00000000 |
| 1 7/8" | 1.875" | 3.874" | 2.815" | 220 | 0000000 | 00000000 | 0000000 | 00000000 |
| 2" | 2" | 3.874" | 2.815" | 220 | 0000000 | 00000000 | 0000000 | 00000000 |
| 24mm | 24mm | 66.7mm | 69.5mm | 220 | 0000000 | 00000000 | 0000000 | 00000000 |
| 25mm | 25mm | 66.7mm | 69.5mm | 220 | 0000000 | 00000000 | 0000000 | 00000000 |
| 28mm | 28mm | 69.9mm | 69.5mm | 220 | 0000000 | 00000000 | 0000000 | 00000000 |
| 30mm | 30mm | 73mm | 69.5mm | 220 | 0000000 | 00000000 | 0000000 | 00000000 |
| 32mm | 32mm | 73mm | 69.5mm | 220 | 0000000 | 00000000 | 0000000 | 00000000 |
| 33mm | 33mm | 77.8mm | 69.5mm | 220 | 0000000 | 00000000 | 0000000 | 00000000 |
| 35mm | 35mm | 77.8mm | 69.5mm | 220 | 0000000 | 00000000 | 0000000 | 00000000 |
| 38mm | 38mm | 87.3mm | 71.5mm | 220 | 0000000 | 00000000 | 0000000 | 00000000 |
| 40mm | 40mm | 87.3mm | 71.5mm | 220 | 0000000 | 00000000 | 0000000 | 00000000 |
| 43mm | 43mm | 90.5mm | 71.5mm | 220 | 0000000 | 00000000 | 0000000 | 00000000 |
| 45mm | 45mm | 90.5mm | 71.5mm | 220 | 0000000 | 00000000 | 0000000 | 00000000 |
| 48mm | 48mm | 98.4mm | 71.5mm | 220 | 0000000 | 00000000 | 0000000 | 00000000 |
| 50mm | 50mm | 98.4mm | 71.5mm | 220 | 0000000 | 00000000 | 0000000 | 00000000 |