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All Single Spring Seals

  • 3021 / 3802 mechanical seal replacement

    3021 / 3802 Mechanical Seal (PS-3021 ; PS-3802)— 3″

    3021 / 3802 Mechanical Seal (PS-3021 ; PS-3802)— 3″

    Single Spring Mechanical Seal 3021 / 3802 | PS-3021 PS-3802 Equivalent

    Direct-fit aftermarket replacement G-Type mechanical seal equal to industry standard 3021 / 3802 and PS-3021 / PS-3802. Built to the John Crane 2100-style design for reliable, leak-tight performance in demanding pump service.

    Key specs: • Shaft size: 3.000″ single spring seal • Seat: 3.875″ × 0.625″ • Rotary OD: 3.898″ • Working length: 2.062″

    Material build

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

    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
    Weight 1 lbs
    Dimensions 8 × 6 × 4 in
  • Placeholder

    3022 Mechanical Seal (PS-3022)— 2-3/8″

    3022 Mechanical Seal (PS-3022)— 2-3/8″

    Single Spring Mechanical Seal 3022 | PS-3022 Equivalent (G-Type / 2100)

    Direct-fit aftermarket G-Type mechanical seal equal to industry standard 3022 / PS-3022. Designed in the John Crane 2100-style configuration for reliable, leak-tight performance in common pump services.

    Key specs: • Shaft size: 2-3/8″ (2.375″) single spring seal • Seat: 3.250″ x 0.562″ • Rotary OD: 3.150 • Working length: 1.299″

    OEM reference

    • OEM number: 81974941

    • Brand: Flowserve Corporation

    • Nameplate data: VCS Mechanical Seal

    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
    Weight 1 lbs
    Dimensions 8 × 6 × 4 in
  • N22 pump seal ps-2016, ps-4518 ps-188 ps-754 ps-204 ps-361 ps-354 ps-305 ps-745 ps-205 ps-523 ps-479 ps-537 ps-323

    305C Mechanical Seal (PS-305) – 1-1/2″

    305C Mechanical Seal (PS-305) – 1-1/2″

    Item #N/A

    Single Spring Mechanical Seal 305c | PS-305 Equivalent

    305c single spring mechanical seal, PS-305 / 305 equivalent. Fits 1-1/2″ shaft with 2.125″× 0.437″ seat and Type N-22 rotary head.

    Shaft size: 1-1/2″, Seat: 2.125″ x 0.437″cup, Rotary OD: 2.067″, Working Length: 1.687″

    Crimped rotary head type N-22. Utilized in centrifugal pumps, mixers, rotating equipment, and further apparatus.

    Interchange / replacements:

    • Equivalent to Pac-Seal T-21 (long working length) and Burgmann MG9

    • Can replace Type E and Type 1 in many applications (confirm dimensions)

    Design & construction:

    • Electro-polished 304 stainless steel metal parts

    • Elastomeric bellows for stable sealing and easy installation

    • Independent of shaft rotation

    Material options (select above):

    • CAR/CER/NIT — Carbon/Ceramic, Nitrile elastomers

    • CAR/CER/VIT — Carbon/Ceramic, Viton elastomers

    • SIC/SIC/VIT — Silicon Carbide/Silicon Carbide, 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  Gaskets.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    Weight 1 lbs
    Dimensions 8 × 6 × 4 in
  • Type n11, C, 1 Mechanical pump Seal - buy now

    309c Mechanical Seal (PS-309) – 7/8″

    309c Mechanical Seal (PS-309) – 7/8″

    Item #N/A

    Single Spring Mechanical Seal 309C — 7/8″ | PS-309 Equivalent

    309c single spring mechanical seal, PS-309 / 309 equivalent. Fits 7/8″ shaft with 1.500″× 0.405″ seat and Type N-11 (Type C/21) rotary head.

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

    Key specs: Shaft size: 7/8″ single spring seal • Seat: 1.500″ x 0.405″ cup • Rotary OD: 1.315″  • Working length: 0.937″

    Design & construction

    Crimped rotary head (type N-11) -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)

    • 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
    Weight 1 lbs
    Dimensions 8 × 6 × 4 in
  • ps-4357 , ps-3170 mechanical seal replacement 2100 type G John Crane 2100 PS-3170 mechanical seal replacement

    3170 Mechanical Seal (PS-3170)— 2″

    3170 Mechanical Seal (PS-3170)— 2″

    Single Spring Mechanical Seal 3170 | PS-3170 Equivalent (G-Type / 2100)

    Direct-fit aftermarket replacement mechanical seal 3170 / PS-3170 built in the G-Type / John Crane 2100 & 2106 style for reliable, leak-tight performance. This seal is a common solution for 2.000″ shaft pump repairs where a floating mating ring (Type G) configuration is required.

    Key specs: • Shaft size: 2.000″ single spring seal • Seat: 2.750″ x 0.500″ • Rotary OD: 2.598″ • Working length: 1.500″

    Material build (standard):

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

    Key Features:

    • Upgraded design: Replaces the original carbon rotary face with a silicon carbide rotary face for enhanced durability and abrasion resistance.

    • Includes Viton #129 O-ring for sleeve

    • Seal type: T-25 L-shape floating seal

    Cross Reference:

    • OEM Number: P5001890

    • Brand: Bell & Gossett (a Xylem brand)

    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
    Weight 1 lbs
    Dimensions 8 × 6 × 4 in
  • N22 pump seal ps-2016, ps-4518 ps-188 ps-754 ps-204 ps-361 ps-354 ps-305 ps-745 ps-205 ps-523 ps-479 ps-537 ps-323

    323c Mechanical Seal (PS-323) – 2-1/4″

    323c Mechanical Seal (PS-323) – 2-1/4″

    Item #N/A

    Single Spring Mechanical Seal 323c | PS-323 Equivalent

    323c single spring mechanical seal, PS-323 / 323 equivalent. Fits 2-1/4″ shaft with 3.125″× 0.562″ seat and Type N-22 rotary head.

    Shaft size: 2-1/4″ • Seat: 3.125″ × 0.562″ cup • Rotary OD: 3.150″ • Working length: 2.375″

    Crimped rotary head type N-22. Utilized in centrifugal pumps, mixers, rotating equipment, and further apparatus.

    Interchange / replacements:

    • Equivalent to Pac-Seal T-21 (long working length) and Burgmann MG9

    • Can replace Type E and Type 1 in many applications (confirm dimensions)

    Design & construction:

    • Electro-polished 304 stainless steel metal parts

    • Elastomeric bellows for stable sealing and easy installation

    • Independent of shaft rotation

    Material options (select above):

    • CAR/CER/NIT — Carbon/Ceramic, Nitrile elastomers

    • CAR/CER/VIT — Carbon/Ceramic, Viton elastomers

    • SIC/SIC/VIT — Silicon Carbide/Silicon Carbide, 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  Gaskets.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    Weight 1 lbs
    Dimensions 8 × 6 × 4 in
  • Type n11, C, 1 Mechanical pump Seal - buy now

    340c Mechanical Seal (PS-340) – 1-7/8″

    340c Mechanical Seal (PS-340) – 1-7/8″

    Item #N/A

    Single Spring Mechanical Seal 340C — 1-7/8″ | PS-340 Equivalent

    340c single spring mechanical seal, PS-340 / 340 equivalent. Fits 1-7/8″ shaft with 2.625″× 0.500″ seat and Type N-11 (Type C/21) rotary head.

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

    Key specs: Shaft size: 1-7/8″ single spring seal • Seat: 2.625″ x 0.500″ cup • Rotary OD: 2.520″ • Working length: 1.500″

    Design & construction:
    Crimped rotary head (Type N-11)—similar to industry Type C / 21; can also replace Type D / 2 with a simple spring change (in most cases). Electro-polished 304 stainless steel metal parts. Elastomeric bellows. Non-directional (independent of shaft rotation).

    Materials available (choose from dropdown)

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

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

    • SIC/SIC/VIT — Silicon Carbide vs. Silicon Carbide faces, Viton (FKM) 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  Gaskets.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    Weight 1 lbs
    Dimensions 8 × 6 × 4 in
  • N22 pump seal ps-2016, ps-4518 ps-188 ps-754 ps-204 ps-361 ps-354 ps-305 ps-745 ps-205 ps-523 ps-479 ps-537 ps-323

    354c Mechanical Seal (PS-354) – 1-3/8″

    354c Mechanical Seal (PS-354) – 1-3/8″

    Item #N/A

    Single Spring Mechanical Seal 354c | PS-354 Equivalent

    354c single spring mechanical seal, PS-354 / 354 equivalent. Fits 1-3/8″ shaft with 2.000″× 0.437″ seat and Type N-22 rotary head.

    Shaft size: 1-3/8″ • Seat: 2.000″ × 0.437″ cup • Rotary OD: 1.941″ • Working length: 1.687″

    Crimped rotary head type N-22. Utilized in centrifugal pumps, mixers, rotating equipment, and further apparatus.

    Interchange / replacements:

    • Equivalent to Pac-Seal T-21 (long working length) and Burgmann MG9

    • Can replace Type E and Type 1 in many applications (confirm dimensions)

    Design & construction:

    • Electro-polished 304 stainless steel metal parts

    • Elastomeric bellows for stable sealing and easy installation

    • Independent of shaft rotation

    Material options (select above):

    • CAR/CER/NIT — Carbon/Ceramic, Nitrile elastomers

    • CAR/CER/VIT — Carbon/Ceramic, Viton (FKM) elastomers

    • SIC/SIC/VIT — Silicon Carbide/Silicon Carbide, Viton (FKM) 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  Gaskets.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    Weight 1 lbs
    Dimensions 8 × 6 × 4 in
  • Type n11, C, 1 Mechanical pump Seal - buy now

    356c Mechanical Seal (PS-356) – 1-1/8″

    356c Mechanical Seal (PS-356) – 1-1/8″

    Item #N/A

    Single Spring Mechanical Seal 356C — 1-1/8″| PS-356 Equivalent

    356c single spring mechanical seal, PS-356 / 356 equivalent. Fits 1-1/8″ shaft with 1.750″× 0.437″ seat and Type N-11 (Type C/21) rotary head.

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

    Key specs: Shaft size: 1-1/8″ single spring seal • Seat: 1.750″ x 0.437″ cup • Rotary OD: 1.650″ • Working length: 1.062″

    Design & construction:
    Crimped rotary head (Type N-11)—similar to industry Type C / 21; can also replace Type D / 2 with a simple spring change (in most cases). Electro-polished 304 stainless steel metal parts. Elastomeric bellows. Non-directional (independent of shaft rotation).

    Materials available (choose from dropdown)

    • CAR/CER/NIT — 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  Gaskets.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    Weight 1 lbs
    Dimensions 8 × 6 × 4 in