All Single Spring Seals
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SPS-205 Mechanical Seal (PS-205 Equivalent) – 1-3/4″
SPS-205 Mechanical Seal (PS-205 Equivalent) – 1-3/4″
Item #N/A
Single Spring Mechanical Seal SPS-205 | PS-205 Equivalent
SPS-205 single spring mechanical seal, equivalent to industry standard PS-205 / 205. Fits 1-3/4″ shaft with 2.500″×0.500″ seat and Type E/1 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 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.
SPS-278 Mechanical Seal (PS-278 Cup) – 2-3/8″
SPS-278 Mechanical Seal (PS-278 Cup) – 2-3/8″
Item #N/A
Single Spring Mechanical Seal SPS-278 | PS-278 cup Equivalent
SPS-278 is a single spring mechanical seal equal to industry standard 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.
SPS-279 Mechanical Seal (PS-279 Cup) – 2-1/2″
SPS-279 Mechanical Seal (PS-279 Cup) – 2-1/2″
Item #N/A
Single Spring Mechanical Seal SPS-279 | PS-279 cup Equivalent
SPS-279 is a single spring mechanical seal equal to industry standard 279 / PS-279 cup
Typical applications: Centrifugal pumps, mixers, and other rotating equipment.
Key specs: Shaft size: 2-1/2″ single spring seal • Seat: 3.375″ x .562″ cup • Rotary OD: 3.210″ • 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.
SPS-3025 Mechanical Seal (PS-3025) – 1-5/8″
SPS-3025 Mechanical Seal (PS-3025) – 1-5/8″
Single Spring Mechanical Seal SPS-3025 | PS-3025 Equivalent
SPS-3025 single spring mechanical seal, PS-3025 / 3025 equivalent. Fits 1-5/8″ shaft with 2.375″×0.500″ seat and Type D/2 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 0.500″ • Rotary OD: 2.636″ • Working length: 1.375″
Design & construction:
Rotary head Type D/2. Electro-polished 304 stainless steel metal parts. Elastomeric bellows. Non-directional (independent of shaft rotation).Material: CAR/SIC/EPDM — Carbon vs. Silicon Carbide, EPDM elastomers
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.
SPS-323 Mechanical Seal (PS-323) – 2-1/4″
SPS-323 Mechanical Seal (PS-323) – 2-1/4″
Single Spring Mechanical Seal SPS-323 | PS-323 Equivalent
323c single spring mechanical seal, PS-323 / 323 equivalent. Fits 2-1/4″ shaft with 3.125″× 0.562″ seat and rotary head Type E/1
Shaft size: 2-1/4″ • Seat: 3.125″ × 0.562″ cup • Rotary OD: 3.150″ • Working length: 2.375″
Typical applications: Centrifugal pumps, mixers, and other rotating equipment.
Design & construction:
Rotary head Type E/1. Electro-polished 316 stainless steel metal parts. Elastomeric bellows. Non-directional (independent of shaft rotation)
Materials available
-
CAR/CER/NIT — Carbon vs. Ceramic faces, Nitrile elastomers
Both PS replacements? Which should I choose? Check out more on our Seal House Seal Guide
Seal Model Product Line Replaces Features & Focus 323C N Line PS-514 Easy installation & broad compatibility SPS-323 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.
Please click “specifications” below for OEM numbers and Pump Nameplate Data
SPS-324 Mechanical Seal (PS-324 Cup) – 3″
SPS-324 Mechanical Seal (PS-324 Cup) – 3″
Item #N/A
Single Spring Mechanical Seal SPS-324 | PS-324 cup Equivalent
SPS-324 single spring mechanical seal, PS-324 / 324 cup equivalent. Fits 3″ shaft with 3.875″×.625″ seat and Type E/1 rotary head.
Typical applications: Centrifugal pumps, mixers, and other rotating equipment.
Key specs: Shaft size: 3″ single spring seal • Seat: 3.875″ x .625″ cup • Rotary OD: 3.770″ • Working length: 2.875″
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.
SPS-501 Mechanical Seal (PS-501 Equivalent) – 5/8″
SPS-501 Mechanical Seal (PS-501 Equivalent) – 5/8″
Single Spring Mechanical Seal SPS-501 | PS-501 Equivalent
SPS-501 single spring mechanical seal, equivalent to industry standard PS-501 / 501. Fits 5/8″ shaft with 1.25″ x 0.406″ seat and Type A/6.
Typical applications: Centrifugal pumps, mixers, and other rotating equipment.
Key specs: Shaft size: 5/8″ single spring seal • Seat: 1.25″ x 0.406″ • Rotary OD: 1.218″ • Working length: 0.811″
Design & construction:
Rotary head Type A/6. 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
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.
SPS-514 Mechanical Seal (PS-514) – 1-5/8″
SPS-514 Mechanical Seal (PS-514) – 1-5/8″
Item #N/A
Single Spring Mechanical Seal SPS-514 | PS-514 Equivalent
SPS-514 single spring mechanical seal, PS-514 / 514 equivalent. Fits 1-5/8″ shaft with 2.37″×0.500″ seat and Type D/2 rotary head.
Typical applications: Centrifugal pumps, mixers, and other rotating equipment.
Key specs: Shaft size: 1-5/8″ single spring seal • Seat: 2.37″ x 0.500″ • Rotary OD: 2.185″ • Working length: 1.375″
Design & construction:
Rotary head Type D/2. 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
-
SIC/SIC/EPR — Silicon Carbide vs. Silicon Carbide faces, EPR 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 514C N Line PS-514 Easy installation & broad compatibility SPS-514 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.
SPS-523 Mechanical Seal (PS-523) — 7/8″
SPS-523 Mechanical Seal (PS-523) — 7/8″
Single Spring Mechanical Seal SPS-523 | PS-523 Equivalent
SPS-523 single spring mechanical seal, PS-523 / 523 equivalent. Fits 1-7/8″ shaft with 2.625″× 0.500″ cup seat, and Type N-22 rotary head.
Key specs: Shaft size: 1-7/8″ single spring seal • Seat: 2.625″ x 0.500″ • Rotary OD: 2.520″• Working length: 2.125″
Rotary head type E/1. Utilized in centrifugal pumps, mixers, rotating equipment, and further apparatus.
Interchange / replacements:
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Can replace Type E and Type 1 in many applications (confirm dimensions)
Design & construction:
-
Electro-polished 316 stainless steel metal parts
-
Elastomeric bellows for stable sealing and easy installation
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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
Seal Model Product Line Replaces Features & Focus 523C N Line PS-514 Easy installation & broad compatibility SPS-523 SPS Line PS-514 Premium build for longevity & like for like replacement.
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
-