1. Mechanical Seals
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356c
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358c
358c
Item #N/A
View ProductSingle Spring Mechanical Seal 358C — 3/4″ | PS-358 Equivalent
Equal to: Industry standard 358 / PS-358
Typical applications: Centrifugal pumps, mixers, and other rotating equipment.
Key specs: Shaft size: 3/4″ single spring seal • Seat: 1.375″ x 0.405″ cup • Rotary OD: 1.197″• Working length: 0.875″
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)
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CAR/CER/NIT — Carbon vs. Ceramic faces, Nitrile elastomers
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CAR/CER/VIT — Carbon vs. Ceramic faces, Viton elastomers
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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.
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359c
359c
Item #N/A
View ProductSingle Spring Mechanical Seal 359C — 5/8″
Equal to:Industry standard 359 / PS-359
Typical applications: Centrifugal pumps, mixers, and other rotating equipment.
Key specs
5/8″ Single spring mechanical seal with 1.250 x .406″ cup seat , 1.063 rotary OD, .875″ working length
Design & construction
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Crimped rotary head — similar to industry Type C / 21
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Can also replace Type D / 2 heads with a simple spring change (in most cases).
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Electro-polished 304 stainless steel metal parts
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Elastomeric bellows
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Non-directional (independent of shaft rotation)
Materials available
(choose from dropdown menu above)
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CAR/CER/NIC — Carbon vs. Ceramic faces, Nitrile elastomers
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CAR/CER/VIT — Carbon vs. Ceramic faces, Viton elastomers
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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
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361c / 2122
361c / 2122
Item #N/A
View ProductSingle Spring Mechanical Seal 361c / 2122 | PS-361 / PS-2122 Equivalent
Equal to industry standard number 361 / PS-361 as well as PS-2122
Shaft size: 1-1/4″ single spring mechanical seal with 1.875″ x .437″ cup seat, 1.787″ rotary OD, 1.687″ working length
Please Note: 361C is a drop-in replacement for U.S. Seal PS-2122 ; Sta-Rite S32013 (and other comparable models), this seal features a smaller-OD rotary for a more universal fit—especially in tight housings and straight-bore/ANSI boxes. The crimped-head design enhances structural integrity and sealing force, delivering higher pressure capability and reliable, long-term performance.
Crimped rotary head type N-22. Utilized in centrifugal pumps, mixers, rotating equipment, and further apparatus.
Interchange / replacements:
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Equivalent to Pac-Seal T-21 (long working length) and Burgmann MG9
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Can replace Type E and Type 1 in many applications (confirm dimensions)
Design & construction:
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Electro-polished 304 stainless steel metal parts
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Elastomeric bellows for stable sealing and easy installation
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Independent of shaft rotation
Materials available
(select from dropdown menu above):
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CAR/CER/NIT — Carbon/Ceramic, Nitrile elastomers
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CAR/CER/VIT — Carbon/Ceramic, Viton elastomers
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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.
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381C
381C
Item #N/A
View ProductSingle Spring Mechanical Seal 381C — 1-1/4″ | PS-381 Equivalent
Equal to: Industry standard 381 / PS-381 ; can also replace PS-804 & PS-246
Typical applications: Centrifugal pumps, mixers, and other rotating equipment.
Key specs: Shaft size: 1-1/4″ single spring seal • Seat: 1.875″ x 0.437″ • 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)
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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.
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446c
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4518c
4518c
Item #N/A
View ProductSingle Spring Mechanical Seal 4518c | PS-4518 Equivalent
Equal to industry standard number 4518 / PS-4518
Shaft size: 3/4″ single spring mechanical seal with 1.375″ x .405″ cup seat, 1.197″ rotary OD, 1.375″ working length
Crimped rotary head type N-22. Utilized in centrifugal pumps, mixers, rotating equipment, and further apparatus.
Interchange / replacements:
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Equivalent to Pac-Seal T-21 (long working length) and Burgmann MG9
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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):
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CAR/CER/NIT — Carbon/Ceramic, Nitrile elastomers
-
CAR/CER/VIT — Carbon/Ceramic, Viton® elastomers
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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.
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479c
479c
Item #N/A
View ProductSingle Spring Mechanical Seal 479c | PS-479 Equivalent
Equal to industry standard number 479 / PS-479
Shaft size: 2″ Single spring mechanical seal with 2.750″ x .500″ cup seat, 2.587″ rotary OD, 2.125″ working length
Crimped rotary head type N-22. Utilized in centrifugal pumps, mixers, rotating equipment, and further apparatus.
Interchange / replacements:
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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.
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514c
514c
Item #N/A
View ProductSingle Spring Mechanical Seal 514C — 1-5/8″ | PS-514 Equivalent
Equal to: Industry standard 514 / PS-514
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:
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.
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