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Piston T-Seal, 2.25 Inch Bore, O-Ring Groove

Description & Features

Rated for pressures from 0 to 10,000 PSI and temperatures ranging from -65°F to 220°F, this Piston T-Seal, 2.25 Inch Bore, O-Ring Groove is built for demanding hydraulic cylinder applications. Manufactured by Hercules Sealing Products, it combines a Buna-N rubber seal body with hard plastic back-up rings, providing reliable sealing performance across a wide range of fluid media and operating conditions.

The O-ring groove configuration suits standard piston installations where a dependable, low-leakage seal is required. The Buna-N compound offers good resistance to petroleum-based hydraulic fluids, making this seal a practical choice for mobile and industrial hydraulic cylinders.

SKU: TP-026

Supplier Part Number (MPN): TP-026

Alternate Part Numbers: C1DM29, MI-02624164, MINO-00407S49736

Specifications

Bore 2.25	Brand Hercules Sealing Products	Brand Hercules Sealing Products	Pack Size 1.00	UOM EA	Supplier Part Number TP-026	Alternate Part Numbers Alternate Part Number C1DM29, Alternate Part Number MI-02624164, Alternate Part Number MINO-00407S49736	Product Weight 0.01 lbs

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Product Questions & Answers (3)

Question by: Dale J on Apr 15, 2025, 4:15 PM

Is this seal somethin' I can use with regular hydraulic fluid, like the kind for tractors?

Answer by: Customer Support on Apr 17, 2025, 6:56 AM

This seal features a Buna-N rubber compound, which offers good resistance to petroleum-based hydraulic fluids commonly used in mobile and industrial hydraulic cylinders.

Question by: Judy R on Apr 30, 2025, 4:14 PM

Got a 2.25 bore cylinder, is this the right piston seal size or am I mixing up bore and groove?

Answer by: Customer Support on May 2, 2025, 6:04 AM

For sizing, the key detail given here is that it is a piston T-seal made for a 2.25 inch bore and it uses an O-ring groove style setup for standard piston installations. If your cylinder is a 2.25 inch bore and your piston is machined for an O-ring groove style T-seal, the size and style match what this part is built for.

Question by: Roy C on Nov 7, 2025, 8:50 PM

Does this seal hold up alright with regular petroleum-based hydraulic fluid, or do I need something different for that kind of setup?

Answer by: Customer Support on Nov 9, 2025, 3:39 PM

Buna-N rubber handles petroleum-based hydraulic fluids well, so for standard hydraulic oil applications this seal is a solid fit. The material was chosen specifically for that compatibility, and it's a common pairing in both mobile and industrial cylinder work.