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561.414.1046

268c Mechanical Seal (PS-268 cup) – 2-3/8″

PS replacement mechanical seal

268c Mechanical Seal (PS-268 cup) – 2-3/8″

SKU: N/A Brand: VULCAN ENGINEERING

Weight .9 lbs
Dimensions 3.5 × 3.5 × 2.5 in
QTY Price
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  • DESCRIPTION

    Single Spring Mechanical Seal 268C cup — 2-3/8″ | PS-268 cup

    268c single spring mechanical seal, PS-268 cup / 268 cup equivalent. Fits 2-3/8″ shaft with 3.250″× 0.562″ seat and Type N-11 (Type C/21) rotary head.

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

    Key specs: Shaft size: 2-3/8″ cup single spring seal  • Seat: 3.250″ x 0.562″ cup • Rotary OD: 3.134″ • Working length: 1.812″

    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).

    Same seal, same dimensions — only the seal faces and rubber parts change. Most clean-water pumps take the Standard seal. Step up to an Upgrade if your pump runs hot, handles chemicals, or pumps gritty water.

    3 seal materials available — choose yours from the drop-down menu above.
    Seal Material Max Temp Choose This If
    Standard – Carbon/Ceramic/NitrileCAR/CER/NIT 200°F Clean water at neutral pH — HVAC, water transfer, pool and general-service pumps. This is the standard build.
    Upgrade – Carbon/Ceramic/VitonCAR/CER/VIT 450°F Your pump runs hot, or handles glycol, oils, fuels, bleach or other chemicals that break down standard Nitrile.
    Upgrade – Silicon Carbide/VitonSIC/SIC/VIT 450°F Gritty or dirty water, wastewater and slurry, or any pump where seals keep wearing out early. Hardest faces we offer.

    Still not sure? Text a photo of your pump nameplate to 561-414-1046 and tell us what the pump runs — we’ll tell you which seal material to order. No purchase required.

    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
  • SPECIFICATIONS
    Cross Reference / Alternative Part Numbers

    OEM numbers: 268 CAR/CER/NIT: 712-1047-753

    Brands: AURORA PUMPS (A PENTAIR Brand)

    Pump Nameplate Data: OJ Power Series #5

    Part number variations
    PS-268 / PS268 / PS 268
    268 seal / 268 mechanical seal / 268 pump seal
    268c / 268 C / 268-c

    Size / measurement variations
    2-3/8″ mechanical seal / 2.375″ seal / 2 3/8 seal
    3.250 × 0.562 seat / 3.25 × .562 seat / 3-1/4 × 9/16 seat
    3.134 rotary OD / 3.134″ OD
    1.812 working length / 1.812″ length

    Style variations
    N-11 / N11 / T-N11
    Type C/21 / Type 21 mechanical seal
    Type D/2 replacement (spring change)

  • PHYSICAL PROPERTIES

    T-N11/N22 Seal Heads

    Our T-N11/N22 type seal heads are designed with a reduced outer diameter, making them fully compatible with ANSI seal chamber dimensions. The rotary portion of our seal is typically smaller than the stationary seat, and can fit straight box bores where many other seals cannot.

    These seals are direct replacements for industry-standard C / 21 models.

    Note: The N11/N22 seal designs max shaft size is 2.25″. For larger shafts, please refer to our other seal types.

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

Disclaimer: Seal House USA provides aftermarket replacement parts. Any OEM names are used strictly for cross-reference. We are an independent supplier.

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