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Mechanical Pump Shaft Seals with Extended Spring
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Seal with Retainer and 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.
Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.
Buna-N Diaphragm—Buna-N diaphragms resist grease and a wide range of oils.
Buna-N Gasket—Buna-N gaskets resist grease and a wide range of oils.
Carbon Washer—Carbon washers are for use with clean liquids.
Cannot Be Sold Outside North America—Products cannot be sold outside North America due to restrictions.
Seal, mm | Seat, mm | Material | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Shaft Dia., mm | Mfr./Brand Equiv. | ID | OD | Wd. | ID | OD | Wd. | Washer | Seat | Spring Shape | Includes | Max. Pressure, psi | Cannot Be Sold To | Each | |||
304 Stainless Steel Case and 304 Stainless Steel Spring with Buna-N Diaphragm and Buna-N Gasket | |||||||||||||||||
| 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 | 9281K684 | 000000 | ||
Cartridge Mechanical Shaft Seals
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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.
Fluoroelastomer Diaphragm—Seals with a fluoroelastomer diaphragm can be used with a wider range of chemicals than EPDM diaphragms, including benzene, butyl alcohol, and fuels.
EPDM Diaphragm—Seals with an EPDM diaphragm won’t break down from exposure to water and steam. However, they are for use with fewer chemicals.
