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Cornell Mechanical Seals

  • Pioneer Cornell Thompson T-2 mechanical seal, Tungsten Carbide

    Cornell & Thompson Mechanical Seal — 3″ T-2 (Tungsten or SiC/SiC)

    Cornell & Thompson Mechanical Seal — 3″ T-2 (Tungsten or SiC/SiC)

    Item #761VSC/VTS

    Cornell & Thompson Mechanical Seal — 3″ T-2 (Tungsten or SiC/SiC)

    This 3″ T-2 mechanical seal is a direct-fit replacement for Cornell and Thompson pumps built around a 3.000″ shaft and T-2 arrangement (3.875 seat). Built to OEM-equivalent standards or higher, it’s available in two material builds — choose the one that fits your service.

    Cross Reference:

    • Thompson: PS-4033 — Q55-5300-1T2

    • Cornell: PS-4033 — A20564P-40 ; PS-2710 — A169720-40, N00137-40

    Choose Your Material

    • Tungsten Carbide / Viton — the OEM-equivalent material these pumps are specified with from the factory. Our premium option.

    • Silicon Carbide / Silicon Carbide / Viton — a lower-cost alternative build for many standard applications.

    At a Glance

    • Shaft size: 3″ (3.000″)

    • Type: T-2 (3.875 seat)

    • Seat: O-ring seat with notch

    • Material options: Tungsten Carbide/Viton (OEM-equivalent, premium) or SiC/SiC/Viton (lower-cost alternative)

    • Fits brands: Cornell, Thompson

    • Form: Seal assembly only (O-rings/gaskets sold separately)

    Material Options Explained 
    As specified from the factory, these pumps typically use a Tungsten Carbide seal — that’s our OEM-equivalent, premium option, matching the original spec. We also offer a Silicon Carbide/Silicon Carbide/Viton build at a lower price as a cost-effective alternative for many applications. Both are direct-fit; the Tungsten Carbide matches the OEM material, while the SiC/SiC option is the more economical choice.

    Applications

    Built for 3″ T-2 Cornell and Thompson pumps. Matching from a worn seal or a parts list? Confirm your pump model and shaft size first, or send a photo of the old seal and your pump nameplate to info@sealhouseusa.com, or call/text 561-414-1046. No purchase required — our seal specialists will match it.

    Explore our full line up of OEM seals 

    Looking for more? Shop Pump Repair Kits, Shaft Seals and Pre-Cut Gaskets

    Have questions? Call us anytime- we’re here to help 

    Weight .5 lbs
    Dimensions 3 × 3 × 4 in
  • Pioneer Cornell Thompson T-2 mechanical seal, Tungsten Carbide

    Pioneer, Cornell & Thompson Mechanical Seal — 1-5/8″ T-2 (Tungsten or SiC/SiC)

    Pioneer, Cornell & Thompson Mechanical Seal — 1-5/8″ T-2 (Tungsten or SiC/SiC)

    Item #821VSC/VTS

    Pioneer, Cornell & Thompson Mechanical Seal — 1-5/8″ T-2 (Tungsten or SiC/SiC)

    This 1-5/8″ T-2 mechanical seal is a direct-fit replacement for Pioneer, Cornell, and Thompson pumps built around a 1.625″ shaft and T-2 arrangement (2.375 seat). Built to OEM-equivalent standards or higher, it’s available in two material builds — choose the one that fits your service.

    Cross Reference:

    • Thompson: PS-3772 — Q55-5162-1T2

    • Pioneer: PS-2739 — 30400193 (316SS)

    • Cornell: PS-3223 — A17064K-40 (316SS)

    Choose Your Material

    • Tungsten Carbide / Viton — the OEM-equivalent material these pumps are specified with from the factory. Our premium option.

    • Silicon Carbide / Silicon Carbide / Viton — a lower-cost alternative build for many standard applications.

    At a Glance

    • Shaft size: 1-5/8″ (1.625″)

    • Type:T-2 (2.375 seat)

    • Material options: Tungsten Carbide/Viton (OEM-equivalent, premium) or SiC/SiC/Viton (lower-cost alternative)

    • Fits brands: Pioneer, Cornell, Thompson

    • Form: Seal assembly only (O-rings/gaskets sold separately)

    Material Options Explained 
    As specified from the factory, these pumps typically use a Tungsten Carbide seal — that’s our OEM-equivalent, premium option, matching the original spec. We also offer a Silicon Carbide/Silicon Carbide/Viton build at a lower price as a cost-effective alternative for many applications. Both are direct-fit; the Tungsten Carbide matches the OEM material, while the SiC/SiC option is the more economical choice.

    Applications

    Built for 1-5/8″ T-2 Pioneer, Cornell, and Thompson pumps. Matching from a worn seal or a parts list? Confirm your pump model and shaft size first, or send a photo of the old seal and your pump nameplate to info@sealhouseusa.com, or call/text 561-414-1046. No purchase required — our seal specialists will match it.

    Explore our full line up of OEM seals 

    Looking for more? Shop Pump Repair Kits, Shaft Seals and Pre-Cut Gaskets

    Have questions? Call us anytime- we’re here to help 

    Weight .30 lbs
    Dimensions 2 × 2 × 2 in
  • Pioneer Cornell Thompson T-2 mechanical seal, Tungsten Carbide

    Pioneer, Cornell & Thompson Mechanical Seal — 2-1/2″ T-2 (Tungsten or SiC/SiC)

    Pioneer, Cornell & Thompson Mechanical Seal — 2-1/2″ T-2 (Tungsten or SiC/SiC)

    Item #835VSC/VTS

    Pioneer, Cornell & Thompson Mechanical Seal — 2.500″ T-2 (Tungsten or SiC/SiC)

    This 2.500″ T-2 mechanical seal is a direct-fit replacement for Pioneer, Cornell, and Thompson pumps built around a 2.500″ shaft and T-2 arrangement (3.375 seat). Built to OEM-equivalent standards or higher, it’s available in two material builds — choose the one that fits your service.

    Cross Reference:

    • Thompson: PS-3888 — Q55-2520-1T2

    • Pioneer: PS-2740 — 30400194, 730400172 (316SS)

    • Cornell: PS-22094 — A16421D-40 (316SS)

    Choose Your Material

    • Tungsten Carbide / Viton — the OEM-equivalent material these pumps are specified with from the factory. Our premium option.

    • Silicon Carbide / Silicon Carbide / Viton — a lower-cost alternative build for many standard applications.

    At a Glance

    • Shaft size: 2.500″ (2-1/2″)

    • Type: T-2 (3.375 seat)

    • Material options: Tungsten Carbide/Viton (OEM-equivalent, premium) or SiC/SiC/Viton (lower-cost alternative)

    • Fits brands: Pioneer, Cornell, Thompson

    • Form: Seal assembly only (O-rings/gaskets sold separately)

    Material Options Explained 
    As specified from the factory, these pumps typically use a Tungsten Carbide seal — that’s our OEM-equivalent, premium option, matching the original spec. We also offer a Silicon Carbide/Silicon Carbide/Viton build at a lower price as a cost-effective alternative for many applications. Both are direct-fit; the Tungsten Carbide matches the OEM material, while the SiC/SiC option is the more economical choice.

    Applications

    Built for 2.500″ T-2 Pioneer, Cornell, and Thompson pumps. Matching from a worn seal or a parts list? Confirm your pump model and shaft size first, or send a photo of the old seal and your pump nameplate to info@sealhouseusa.com, or call/text 561-414-1046. No purchase required — our seal specialists will match it.

    Explore our full line up of OEM seals 

    Looking for more? Shop Pump Repair Kits, Shaft Seals and Pre-Cut Gaskets

    Have questions? Call us anytime- we’re here to help 

    Weight .25 lbs
    Dimensions 3 × 3 × 3 in