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Single Spring Seal

  • N22 PS replacement mechanical seal

    204C Mechanical Seal (PS-204) – 1-1/8″

    204C Mechanical Seal (PS-204) – 1-1/8″

    Item #N/A

    Single Spring Mechanical Seal 204c | PS-204 Equivalent

    204c single spring mechanical seal, PS-204 / 204 equivalent. Fits 1-1/8″ shaft with 1.750″×.437″ seat and Type N-22 rotary head.

    Shaft size: 1-1/8″ Seat: 1.750″ x .437″ cup, Rotary OD: 1.650″, 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 .35 lbs
    Dimensions 2.25 × 2.25 × 2.25 in
  • N22 PS replacement mechanical seal

    205C Mechanical Seal (PS-205) – 1-3/4″

    205C Mechanical Seal (PS-205) – 1-3/4″

    Item #N/A

    Single Spring Mechanical Seal 205c | PS-205 Equivalent

    205c single spring mechanical seal, PS-205 / 205 equivalent. Fits 1-3/4″ shaft with 2.500″×.500″ seat and Type N-22 rotary head.

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

    Key specs: Shaft size: 1-3/4″ single spring seal • Seat: 2.500″ x .500″ • Rotary OD: 2.402″ • Working length: 2.000″

    Design & construction:
    Crimped rotary head (Type N-22)—equivalent to Pac-Seal T-21 (long working length) and Burgmann MG9, can replace seal type E & 1 seal heads. Electro-polished 304 stainless steel metal parts. Elastomeric bellows. Non-directional (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

    Seal Model Product Line Replaces Features & Focus
    205C N Line PS-514 Easy installation & broad compatibility
    SPS-205 SPS Line PS-514 Premium build for longevity & like for like replacement.

    Both PS replacements? Which should I choose? Check out more on our Seal House Seal Guide

    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 .9 lbs
    Dimensions 2.75 × 2.75 × 2.75 in
  • PS replacement mechanical seal

    2120C Mechanical Seal (PS-2120) – 2-1/2″

    2120C Mechanical Seal (PS-2120) – 2-1/2″

    Single Spring Mechanical Seal 2120C — 2-1/2″ | PS-2120 Equivalent

    2120c single spring mechanical seal, PS-2120 / 2120 equivalent. Fits 2-1/2″ shaft with 3.375″×0.562″ seat and Type N-11 (Type C/21) rotary head.

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

    Key specs: Shaft size: 2-1/2″ single spring seal • Seat: 3.375″ x 0.562″ • Rotary OD: 3.209″ • Working length: 1.812″

    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).

    Material: CAR/CER/NIT — Carbon vs. Ceramic faces, Nitrile 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 .9 lbs
    Dimensions 3.5 × 3.5 × 2.5 in
  • PS-2161 mechanical seal, 2161, 5/8 inch shaft, Type 6A, carbon and ceramic faces, Buna-N elastomers

    2161 Mechanical Seal (PS-2161) — 5/8″ | Marlow SCT & LX Pumps

    2161 Mechanical Seal (PS-2161) — 5/8″ | Marlow SCT & LX Pumps

    Item #2161

    2161 Mechanical Seal (PS-2161) — 5/8″ Type 6A

    Equal to industry standard 2161 / PS-2161. Direct-fit Type 6A single-spring seal for pool, spa and small-pump applications — built with molded carbon / ceramic faces and Buna-N elastomers for dependable everyday service.

    At a Glance

    5/8? shaft • 1.437? OD • 0.615? operating height • 1.375? × 0.406? ceramic cup seat • Type 6A • Molded carbon/Ceramic faces • Buna-N elastomers

    Cross References:

    Replaces Marlow (ITT Industries) 46328-00 and 46328000000 on SCT Series stainless steel pumps, and fits LX pumps. Cross-references to US Seal PS-2161.

    Construction

    Single-spring design running a molded carbon rotary face against a ceramic cup seat, with Buna-N elastomers throughout. Working length 0.615″ — check this against your old seal if you are matching from a worn part, as it is what separates the 5/8″ families from one another.

    Is the 2161 Your Seal?

    Pool and spa seals are rarely marked, so most people match by measuring. Check three things against your old seal:

    • Shaft diameter — 5/8″. Measure the motor shaft, not the seal bore.

    • Ceramic seat outside diameter — 1.375″. This is the flat ceramic ring that presses into the pump housing

    • Working length — 0.615″, the height of the seal assembly as it sits compressed.

    Need Help Matching?

    Send a photo of the old seal and your pump nameplate to info@sealhouseusa.com, or call or text 561-414-1046 — our seal specialists will confirm it before you order. No purchase required. Not sure which family you need? See our  Pool/Spa Small Pump Guide 

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

    Weight .25 lbs
    Dimensions 1.5 × 1.5 × 1.5 in
  • PS replacement mechanical seal

    235C Mechanical Seal (PS-235) – 1″

    235C Mechanical Seal (PS-235) – 1″

    Item #N/A

    Single Spring Mechanical Seal 235C — 1″ | PS-235 Equivalent

    235c single spring mechanical seal, PS-235 / 235 equivalent. Fits 1″ shaft with 1.625″×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″ single spring seal • Seat: 1.625″ x 0.437″ cup • Rotary OD: 1.547″ • Working length: 1.ooo”

    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 .35 lbs
    Dimensions 2 × 2 × 1.75 in
  • PS replacement mechanical seal

    238C Mechanical Seal (PS-238) – 1-5/8″

    238C Mechanical Seal (PS-238) – 1-5/8″

    Item #N/A

    Single Spring Mechanical Seal 238C — 1-5/8″| PS-238 Equivalent

    238c single spring mechanical seal, PS-238 / 238 equivalent. Fits 1-5/8″ shaft with 2.375″×.500″ seat and Type N-11 (Type C/21) rotary head.

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

    Key specs: Shaft size: 1-5/8″ single spring seal • Seat: 2.375″ x .500″ cup • Rotary OD: 2.185″ • Working length: 1.375″

    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 menu above)

    • CAR/CER/NIC — 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 Pre-Cut Gaskets.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    Weight .9 lbs
    Dimensions 2.5 × 2.5 × 2 in
  • PS-267 mechanical seal

    267c Mechanical Seal (PS-267) – 2″

    267c Mechanical Seal (PS-267) – 2″

    Item #N/A

    Single Spring Mechanical Seal 267C — 2″ | PS-267 Equivalent

    267c single spring mechanical seal, PS-267 / 267 equivalent. Fits 2″ shaft with 2.750″× 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: 2″ single spring seal • Seat: 2.750″ x 0.500″ cup • Rotary OD: 2.587″ • 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 .9 lbs
    Dimensions 3 × 3 × 3 in
  • PS replacement mechanical seal

    268C Mechanical Seal (PS-268 cup) – 2-3/8″

    268C Mechanical Seal (PS-268 cup) – 2-3/8″

    Item #N/A

    Single Spring Mechanical Seal 268C cup — 2-3/8″ | PS-268 cup Equivalent

    268c single spring mechanical seal, PS-268 cup / 268 cup equivalent. Fits 2-3/8″ shaft with 3.250″× 0.562″ seat and Type N-11 (Type C/21) rotary head.

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

    Key specs: Shaft size: 2-3/8″ cup single spring seal  • Seat: 3.250″ x 0.562″ cup • Rotary OD: 3.134″ • Working length: 1.812″

    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 .9 lbs
    Dimensions 3.5 × 3.5 × 2.5 in
  • PS-3015 mechanical seal pump buy now

    3015 Mechanical Seal (PS-3015)— 1-3/8″

    3015 Mechanical Seal (PS-3015)— 1-3/8″

    Single Spring Mechanical Seal 3015 | PS-3015 Equivalent (G-Type / 2100)

    Direct-fit aftermarket 3015 / PS-3015 mechanical pump seal built in the G-Type / John Crane 2100 style—a compact, unitized, single-spring elastomer bellows seal design widely used across pump applications. Ideal for repairs where you need OEM-style fit and reliable sealing performance.

    Key specs: • Shaft size: 1-3/8″ (1.375″) single spring seal • Seat: 2.000″ x 0.437″ • Rotary OD: 1.929″ • Working length: 1.024″

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

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

    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.

    Weight .3 lbs
    Dimensions 2.5 × 2.5 × 2 in