Single Spring Mechanical Seal 235C — 1″ | PS-235 Equivalent

235c single spring mechanical seal, PS-235 / 235 equivalent. Fits 1″ shaft with 1.625″×0.437″ seat and Type N-11 (Type C/21) rotary head.

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

Key specs: Shaft size: 1″ single spring seal • Seat: 1.625″ x 0.437″ cup • Rotary OD: 1.547″ • Working length: 1.ooo”

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.

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Please click “specifications” below for OEM numbers and Pump Nameplate Data