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Single Spring Seal

  • Buy ps-3021 pump seal

    3021 / 3802

    3021 / 3802

    Mechanical Seal 3021 / 3802 — G-Type (John Crane 2100 Equivalent)

    Direct-fit G-Type replacement equal to industry standard 3021/3802 and PS-3021 / PS-3802. Designed to the John Crane 2100 style for reliable, leak-tight performance.

    Material build (standard)

    • VIT / SIC / SIC — Viton elastomers; Silicon Carbide vs. Silicon Carbide faces
      Excellent chemical/temperature resistance and wear durability.

    Key dimensions

    • Seat: 3.875″ × 0.625″

    • Rotary OD: 3.898″

    • Working length: 2.062″

    Cross-references

    • 3021 / 3802, PS-3021 / PS-3802

    • Industry standard G-Type / John Crane 2100

    Have questions? Check out our Single Spring Seal Guide  or call us anytime—we’re here to help.

    Explore our full lineup of Single Spring Seals—PS replacements, pool/spa seals, and our SPS line.

    Looking for more? Shop Pump Repair Kits, Parts & Accessories, and Pre-Cut Gaskets.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    View Product
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    3022

    3022

    Mechanical Seal 3022– Equal to industry standard 3022/ PS-3022

    2-3/8″ Industry standard G type / John Crane 2100

    3.250″ x .562″ seat, 3.150 rotary OD, 1.299″ working length

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    View Product
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    305c

    305c

    Item #N/A

    Single Spring Mechanical Seal 305C – Equal to industry standard number 305 / PS-305

    1-1/2″ Single spring mechanical seal with 2.125″ x .437″ cup seat, 2.067″ rotary OD, 1.687″ working length

    Crimped rotary head type N-22, equivalent to Pac-Seal T-21 (long w/l) and Burgmann MG9, can replace seal type E & 1

    Electro polished 304SS metal parts.

    Single spring mechanical seal, with an elastomeric bellows, independent of the direction of rotation of the shaft. Utilized in centrifugal pumps, mixers, rotating equipment, and further apparatus.

    Have questions? Check out our Single Spring Seal Guide  or call us anytime—we’re here to help.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    View Product
  • Type n11, C, 1 Mechanical pump Seal - buy now

    309c

    309c

    Item #N/A

    Single Spring Mechanical Seal 309C — 7/8″

    Equal to:Industry standard 309 / PS-309

    Typical applications: Centrifugal pumps, mixers, and other rotating equipment.

    Key specs

    7/8″ Single spring mechanical seal with 1.500″ x .405″ cup seat, 1.315″ rotary OD, 0.937″ working length

    Design & construction

    Crimped rotary head -similar to industry types such as  C  &  21  while they can also replace type  D / 2  seal heads with a simple spring change in most cases (spring from before). Electro polished 304SS metal parts. Single spring mechanical seal, with an elastomeric bellows, all engineered for non-directional operation (independent of shaft rotation).

    Materials available

    (choose from dropdown menu above)

    • CAR/CER/NIC — Carbon vs. Ceramic faces, Nitrile elastomers

    • CAR/CER/VIT — Carbon vs. Ceramic faces, Viton elastomers

    • SIC/SIC/VIT — Silicon Carbide vs. Silicon Carbide faces, Viton® elastomers

    Have questions? Check out our Single Spring Seal Guide  or call us anytime—we’re here to help.

    Explore our full lineup of Single Spring Seals—PS replacements, pool/spa seals, and our SPS line.

    Looking for more? Shop Pump Repair Kits, Parts & Accessories, and Pre-Cut Gaskets.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    View Product
  • ps-4357 , ps-3170 mechanical seal replacement 2100 type G John Crane 2100

    3170

    3170

    Mechanical Seal 3170 – Equal to industry standard 3170 / PS-3170 -sc-sc

    2″ Industry standard G type / John Crane 2100

    2.750″ x .500″ seat, 2.598″ rotary OD, 1.500″ working length

    T-G VITON / SILICON CARBIDE / SILICON CARBIDE

    Come with viton #129 o-ring for sleeve

    *Note this seal is an upgraded version from a carbon rotary face to silicon carbide

    T-25 L shape floating seal

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    View Product
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    323c

    323c

    Item #N/A

    Single Spring Mechanical Seal 323C – Equal to industry standard number 323 / PS-323

    2-1/4″ Single spring mechanical seal with 3.125″ x .562″ cup seat, 3.150″ rotary OD, 2.375″ working length

    Crimped rotary head type N-22, equivalent to Pac-Seal T-21 (long w/l) and Burgmann MG9, can replace seal type E & 1

    Electro polished 304SS metal parts.

    Single spring mechanical seal, with an elastomeric bellows, independent of the direction of rotation of the shaft. Utilized in centrifugal pumps, mixers, rotating equipment, and further apparatus.

    Have questions? Check out our Single Spring Seal Guide  or call us anytime—we’re here to help.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    View Product
  • Type n11, C, 1 Mechanical pump Seal - buy now

    340c

    340c

    Item #N/A

    Single Spring Mechanical Seal 340C – Equal to industry standard number 340 / PS-340

    1-7/8″ Single spring mechanical seal with 2.625″ x .500″ cup seat, 2.520″ rotary OD, 1.500″ working length

    Crimped rotary head- similar to industry types such as  C  &  21  while they can also replace type  D / 2  seal heads with a simple spring change in most cases (spring from before).

    Electro polished 304SS metal parts.

    Single spring mechanical seal, with an elastomeric bellows, independent of the direction of rotation of the shaft. Utilized in centrifugal pumps, mixers, rotating equipment, and further apparatus.

    Have questions? Check out our Single Spring Seal Guide  or call us anytime—we’re here to help.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    View Product
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    354c

    354c

    Item #N/A

    Single Spring Mechanical Seal 354C – Equal to industry standard number 354 / PS-354

    1-3/8″ Single spring mechanical seal with 2.000″ x .437″ cup seat, 1.941″ rotary OD, 1.687″ working length

    Crimped rotary head type N-22, equivalent to Pac-Seal T-21 (long w/l) and Burgmann MG9, can replace seal type E & 1

    Electro polished 304SS metal parts.

    Single spring mechanical seal, with an elastomeric bellows, independent of the direction of rotation of the shaft. Utilized in centrifugal pumps, mixers, rotating equipment, and further apparatus.

    Have questions? Check out our Single Spring Seal Guide  or call us anytime—we’re here to help.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    View Product
  • Type n11, C, 1 Mechanical pump Seal - buy now

    356c

    356c

    Item #N/A

    Single Spring Mechanical Seal 356C – Equal to industry standard number 356 / PS-356

    1-1/8″ Single spring mechanical seal with 1.750″ x .437″ cup seat, 1.650″ rotary OD, 1.062″ working length

    Crimped rotary head-similar to industry types such as  C  &  21  while they can also replace type  D / 2  seal heads with a simple spring change in most cases (spring from before).

    Electro polished 304SS metal parts.

    Single spring mechanical seal, with an elastomeric bellows, independent of the direction of rotation of the shaft. Utilized in centrifugal pumps, mixers, rotating equipment, and further apparatus.

    Have questions? Check out our Single Spring Seal Guide  or call us anytime—we’re here to help.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    View Product