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Single Spring Seal

  • 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

    754c

    754c

    Item #N/A

    Single Spring Mechanical Seal 754c | PS-754 Equivalent

    Equal to industry standard number 754 / PS-754

    Shaft size: 1″ single spring mechanical seal with 1.625″ x .437″ cup seat, 1.547″ rotary OD, 1.625″ working length

    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

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

    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.

    View Product
  • Type n11, C, 1 Mechanical pump Seal - buy now

    758c

    758c

    Item #N/A

    Single Spring Mechanical Seal 758C — 1-1/2″ | PS-758 Equivalent

    Equal to: Industry standard 758 / PS-758

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

    Key specs: Shaft size: 1-1/2″ single spring seal • Seat: 2.125″ x 0.437″ cup • Rotary OD: 2.067″• Working length: 1.125″

    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

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

    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.

    View Product
  • Type n11, C, 1 Mechanical pump Seal - buy now

    844c

    844c

    Item #N/A

    Single Spring Mechanical Seal 844C — 2-1/8″ | PS-844 Equivalent

    Equal to: Industry standard 844 / PS-844

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

    Key specs: Shaft size: 2-1/8″ single spring seal • Seat: 3.000″ x 0.562″ cup • Rotary OD: 2.776″ • Working length: 1.687″

    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

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

    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.

    View Product
  • ps-100 , ps-200 , ps-201 mechanical seal- buy now!

    851

    851

    Mechanical Seal 851 — Type 166 / T-16 (3/4″) | PS-851 Equivalent

    Equal to industry standard 851 / PS-851.
    Direct-fit Type 166 / T-16 single-spring seal for pool/spa and small-pump applications—built with a machined carbon/ceramic face set and Buna-N elastomers for reliable everyday service.

    At-a-glance specs: 3/4″ shaft • 1.375″ × 0.406″ cup seat • Machined carbon/ceramic faces • Buna-N elastomers

    Why choose 851 (PS-851):

    • T-16 footprint for quick, drop-in replacement

    • Machined carbon face for smoother sealing vs. molded carbon

    • Dependable materials for standard pool/spa chemistry

    Upgrades / Variations (same footprint)

    • 201c — Basic (Buna)

    • 3868 — Premium + Viton

    • 201cv  — Molded carbon

    •  201cvss— Silicon Carbide / Silicon Carbide / Viton

    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.

    Have questions? Check out our Pool/Spa Small Pump Guide or call us anytime—we’re here to help.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    View Product
  • ps-100 , ps-200 , ps-201 mechanical seal- buy now!

    957

    957

    Mechanical Seal 957 — Type 166 / T-16 (5/8″) | PS-957 Equivalent

    Equal to industry standard 957 / PS-957.
    Direct-fit Type 166 / T-16 single-spring seal for pool/spa and small-pump applications—built with a machined carbon/ceramic face set and Buna-N elastomers for reliable everyday service.

    At-a-glance specs: 5/8″ shaft • 1.187″ × 0.343″ cup seat • Machined carbon/ceramic faces • Buna-N elastomers

    Why choose 957 (PS-957):

    • T-16 footprint for fast, drop-in replacement

    • Machined carbon face for smoother sealing vs. molded carbon

    • Dependable materials for standard pool/spa chemistry

    Upgrades / Variations (same footprint):

    • 100c  — Basic

    • 3866 — Premium + Viton

    • 100cv — Molded carbon

    • 100cvss  — Silicon Carbide / Silicon Carbide / Viton

    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.

    Have questions? Check out our Pool/Spa Small Pump Guide or call us anytime—we’re here to help.

    Please click “specifications” below for OEM numbers and Pump Nameplate Data
    View Product
  • ps-1000 ,ps-961 ps-3865 mechanical seal

    961

    961

    Mechanical Seal 961 — T-6A (5/8″) | PS-961 Equivalent

    Equal to industry standard 961 / PS-961.
    Direct-fit T-6A single-spring seal for pool/spa and small-pump applications—built with a machined carbon face for smoother sealing and longer life in everyday service.

    At-a-glance: 5/8″ shaft • 1.25″ × 0.406″ cup seat • Machined carbon/ceramic faces • Buna-N elastomers

    Why choose 961 (PS-961)

    • T-6A footprint for quick, drop-in replacement

    • Machined carbon vs. molded carbon for improved surface finish and stability

    • Dependable Buna-N for standard pool/spa chemistry

    Upgrades / Variations (same footprint)

    • 1000 — Basic

    • 3865 — Premium + Viton

    • 1000cv— Molded carbon

    • 1000cvss — Silicon Carbide / Silicon Carbide / Viton

    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.

    Have questions? Check out our Pool/Spa Small Pump Guide or call us anytime—we’re here to help

    Please click “specifications for OEM numbers and Nameplate Data
    View Product
  • buy PS-381 PS-978 Pump Seal

    978c

    978c

    Item #N/A

    Single Spring Mechanical Seal 978C — 1-1/4″ | PS-978 Equivalent

    Equal to: Industry standard 978 / PS-978

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

    Key specs: Shaft size: 1-1/4″ single spring seal • Seat: 1.765″ x .365″ • Rotary OD: 1.787″ • Working length: 1.062″

    Design & construction:
    Crimped rotary head (Type N-33)—equivalent to Pac-Seal T-21 (tapered spring) and Burgmann MG9, can replace seal type D & 2 type seal heads. Tapered spring for wide base to fit over impeller hub or other similar feature. 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

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

    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.

    View Product
  • Placeholder

    SPS-205

    SPS-205

    Item #N/A

    Single Spring Mechanical Seal SPS-205 | PS-205 Equivalent

    Equal to industry standard number 205 / PS-205

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

    Key specs: Shaft size: 1-3/4″ single spring seal • Seat: 2.500″ x 0.500″ • Rotary OD: 2.402″ • Working length: 2.000″

    Design & construction:
    Rotary head Type E/1. Electro-polished 316 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

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

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

    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.

     

    SPS Line

    Same Fit. Lasting Reliability.

    Our SPS single-spring seals are like-for-like replacements for industry-standard E/1, D/2, and C/21 heads—delivering the same fit and function with upgraded materials designed for extended service life.

    What sets SPS apart:

    • Heavier elastomer bellows for improved structural integrity and stability under pressure

    • Resin-impregnated, abrasion-resistant carbon faces — double-density carbon designed for enhanced hardness and durability

    • 316/304 stainless steel components for superior corrosion protection across E/1, D/2, and C/21 head styles

    • Precision-finished rotary heads with a brushed appearance for a high-quality machined look and consistent sealing performance

    • Built to exacting standards for dependable performance across a wide range of pump applications

    Engineered to rigorous standards, SPS seals provide a durable, dependable alternative to common aftermarket or OEM options—compare them against your current line and see the difference.

    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.

    View Product
  • Placeholder

    SPS-278

    SPS-278

    Item #N/A

    Single Spring Mechanical Seal SPS-278 | PS-278 cup Equivalent

    Equal to: industry standard number 278 / PS-278 cup

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

    Key specs: Shaft size: 2-3/8″ single spring seal • Seat: 3.250″ x .562″ cup • Rotary OD: 3.083″ • Working length: 2.500″

    Design & construction:
    Rotary head Type E/1. Electro-polished 316 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

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

    Same Fit. Lasting Reliability.

    Our SPS single-spring seals are like-for-like replacements for industry-standard E/1, D/2, and C/21 heads—delivering the same fit and function with upgraded materials designed for extended service life.

    What sets SPS apart:

    • Heavier elastomer bellows for improved structural integrity and stability under pressure

    • Resin-impregnated, abrasion-resistant carbon faces — double-density carbon designed for enhanced hardness and durability

    • 316/304 stainless steel components for superior corrosion protection across E/1, D/2, and C/21 head styles

    • Precision-finished rotary heads with a brushed appearance for a high-quality machined look and consistent sealing performance

    • Built to exacting standards for dependable performance across a wide range of pump applications

    Engineered to rigorous standards, SPS seals provide a durable, dependable alternative to common aftermarket or OEM options—compare them against your current line and see the difference.

    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.

    View Product

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