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    4 Products

    Mechanical Pump Shaft Seals with Extended Spring

    Image of Product. Seal with Retainer and Straight Spring. Front orientation. Exploded view. Contains Annotated. Shaft Seals. Mechanical Pump Shaft Seals with Extended Spring, Straight Spring, Spring Retainer.

    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.
    Viton® Fluoroelastomer Diaphragm—Viton® fluoroelastomer diaphragms resist a wider range of chemicals than Buna-N.
    Buna-N Gasket—Buna-N gaskets resist grease and a wide range of oils.
    Viton® Fluoroelastomer Gasket—Viton® fluoroelastomer gaskets resist a wider range of chemicals than Buna-N.
    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
    28John Crane Type 21
    Pac-Seal Type 21
    Pac-Seal Type 31
    Sealol Type 43 CE Short
    Sealol Type 43 CU Short    		28.00045.60027.00030.68044.50011.000CarbonCeramicStraightSpring Retainer250Outside North America9281K611000000
     
    304 Stainless Steel Case and 304 Stainless Steel Spring with Viton® Fluoroelastomer Diaphragm and Viton® Fluoroelastomer Gasket
    28John Crane Type 21
    Pac-Seal Type 21
    Pac-Seal Type 31
    Sealol Type 43 CE Short
    Sealol Type 43 CU Short    		28.00045.60027.00030.68044.50011.000CarbonCeramicStraightSpring Retainer250Outside North America9281K43200000
     

    Cartridge Mechanical Shaft Seals

    Image of Product. Front orientation. Exploded view. Shaft Seals. Cartridge Mechanical Shaft 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.
    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.
    Seal,
    mm
    Fluoroelastomer
    Diaphragm
    EPDM Diaphragm
    For Shaft
    Dia., mm
    ID
    OD
    Wd.
    Max. Pressure,
    psi
    Each
    Each
    316 Stainless Steel Case and C276 Nickel Spring with PTFE Gasket
    282869.969.52204887N230000000004887N47000000000
     
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