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561.414.1046

340c Mechanical Seal (PS-340) – 1-7/8″

Type n11, C, 1 Mechanical pump Seal - buy now

340c Mechanical Seal (PS-340) – 1-7/8″

SKU: N/A Brand: VULCAN ENGINEERING

Weight 1 lbs
Dimensions 8 × 6 × 4 in
QTY Price
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  • DESCRIPTION

    Single Spring Mechanical Seal 340C — 1-7/8″ | PS-340 Equivalent

    340c single spring mechanical seal, PS-340 / 340 equivalent. Fits 1-7/8″ shaft with 2.625″× 0.500″ seat and Type N-11 (Type C/21) rotary head.

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

    Key specs: Shaft size: 1-7/8″ single spring seal • Seat: 2.625″ x 0.500″ cup • Rotary OD: 2.520″ • Working length: 1.500″

    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)

    • 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

    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: 

    340 CAR/CER/NIT: 231-31-435 , 0046389 , 0046389 , 148590001 , PK-0893 , S32694 , 007131

    Brands: BUFFALO PUMPS , CRANE-DEMING (Division of CRANE PUMPS & SYSTEMS) , CRANE PUMPS & SYSTEMS , HOLLAND PUMP MFG. , HYDROMATIC PUMP COMPANY , NASH (Division of GARDNER DENVER , STA-RITE INDUSTRIES , ZOELLER PUMP COMPANY

    Pump Nameplate Data: None available

    Part number variations
    PS-340 / PS340 / PS 340
    340 seal / 340 mechanical seal / 340 pump seal
    340c / 340 C / 340-c

    Size / measurement variations
    1-7/8″ mechanical seal / 1.875″ seal / 1 7/8 seal
    2.625 × .500 seat / 2-5/8 × 1/2 seat / 2.625 x 0.5 seat
    2.520 rotary OD / 2.520″ OD
    1.500 working length / 1.5 working length

    Style variations
    N-11 / N11 / T-N11 seal head
    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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