N Line/PS replacement line
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358c
358c
Item #N/A
View ProductSingle Spring Mechanical Seal 358C – Equal to industry standard number 358/ PS-358
3/4″ Single spring mechanical seal with 1.375 x .405″ cup seat , 1.197 rotary OD, .875″ working length
Crimped rotary head- 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, independent of the direction of rotation of the shaft. Utilized in centrifugal pumps, mixers, rotating equipment, and further apparatus.
Have questions? Check out our Single Spring Seal Guide or call us anytime—we’re here to help.
Please click “specifications” below for OEM numbers and Pump Nameplate Data
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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 – Equal to industry standard number 361 / PS-361 as well as PS-2122
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.
1-1/4″ Single spring mechanical seal with 1.875″ x .437″ cup seat, 1.787″ rotary OD, 1.687″ working length
Crimped rotary head type N-22, equivalent to Pac-Seal T-21 (long w/l) and Burgmann MG9, can replace seal type E & 1.
Electro polished 304SS metal parts.
Single spring mechanical seal, with an elastomeric bellows, independent of the direction of rotation of the shaft. Utilized in centrifugal pumps, mixers, rotating equipment, and further apparatus.
Have questions? Check out our Single Spring Seal Guide or call us anytime—we’re here to help.
Please click “specifications” below for OEM numbers and Pump Nameplate Data
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381C
381C
Item #N/A
View ProductSingle Spring Mechanical Seal 381C – Equal to industry standard number 381 / PS-381, can also replace PS-804 & PS-246
Tapered spring for wide base to fit over impeller hub or other similar feature
1-1/4″ Single spring mechanical seal with 1.875″ x .437″ cup seat, 1.787″ rotary OD, 1.062″ working length
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.
Electro polished 304SS metal parts.
Single spring mechanical seal, with an elastomeric bellows, independent of the direction of rotation of the shaft. Utilized in centrifugal pumps, mixers, rotating equipment, and further apparatus.
Have questions? Check out our Single Spring Seal Guide or call us anytime—we’re here to help.
Please click “specifications” below for OEM numbers and Pump Nameplate Data
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446c
446c
Item #N/A
View ProductSingle Spring Mechanical Seal 446C – Equal to industry standard number 446 / PS-446
1-3/4″ Single spring mechanical seal with 2.500″ x .500″ cup seat, 2.402″ rotary OD, 1.375″ working length
Crimped rotary head- 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, independent of the direction of rotation of the shaft. Utilized in centrifugal pumps, mixers, rotating equipment, and further apparatus.
Have questions? Check out our Single Spring Seal Guide or call us anytime—we’re here to help.
Please click “specifications” below for OEM numbers and Pump Nameplate Data
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4518c
4518c
Item #N/A
View ProductSingle Spring Mechanical Seal 4518C – Equal to industry standard number 4518 / PS-4518
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, equivalent to Pac-Seal T-21 (long w/l) and Burgmann MG9, can replace seal type E & 1
Electro polished 304SS metal parts.
Single spring mechanical seal, with an elastomeric bellows, independent of the direction of rotation of the shaft. Utilized in centrifugal pumps, mixers, rotating equipment, and further apparatus.
Have questions? Check out our Single Spring Seal Guide or call us anytime—we’re here to help.
Please click “specifications” below for OEM numbers and Pump Nameplate Data
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479c
479c
Item #N/A
View ProductSingle Spring Mechanical Seal 479 C – Equal to industry standard number 479 / PS-479
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, equivalent to Pac-Seal T-21 (long w/l) and Burgmann MG9, can replace seal type E & 1
Electro polished 304SS metal parts.
Single spring mechanical seal, with an elastomeric bellows, independent of the direction of rotation of the shaft. Utilized in centrifugal pumps, mixers, rotating equipment, and further apparatus.
Have questions? Check out our Single Spring Seal Guide or call us anytime—we’re here to help.
Please click “specifications” below for OEM numbers and Pump Nameplate Data
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514c
514c
Item #N/A
View ProductSingle Spring Mechanical Seal 514C – Equal to industry standard number 514 / PS-514
Tapered spring for wide base to fit over impeller hub or other similar feature
1-5/8″ Single spring mechanical seal with 2.37″ x .500″ cup seat, 2.185″ rotary OD, 1.375″ working length
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.
Electro polished 304SS metal parts.
Single spring mechanical seal, with an elastomeric bellows, independent of the direction of rotation of the shaft. Utilized in centrifugal pumps, mixers, rotating equipment, and further apparatus.
Have questions? Check out our Single Spring Seal Guide or call us anytime—we’re here to help.
Please click “specifications” below for OEM numbers and Pump Nameplate Data
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523c
523c
Item #N/A
View ProductSingle Spring Mechanical Seal 523C – Equal to industry standard number 523 / PS-523
1-7/8″ Single spring mechanical seal with 2.625″ x .500″ cup seat, 2.520″ rotary OD, 2.125″ working length
Crimped rotary head type N-22, equivalent to Pac-Seal T-21 (long w/l) and Burgmann MG9, can replace seal type E & 1
Electro polished 304SS metal parts.
Single spring mechanical seal, with an elastomeric bellows, independent of the direction of rotation of the shaft. Utilized in centrifugal pumps, mixers, rotating equipment, and further apparatus.
Have questions? Check out our Single Spring Seal Guide or call us anytime—we’re here to help.
Please click “specifications” below for OEM numbers and Pump Nameplate Data