U-seals, Polypaks, U-cups

Style 870 u-seals are precision molded from Buna-N synthetic rubber. Style 870 u-seal numbers conform in size to Army-Navy specification AN6226.

70A Durometer | Buna-N Rubber Material | 4 1/4 in Nominal Inner Diameter | U-Seal

Featuring high pressure and high shock load capability, this seal utilizes the same twin lip design found in Hercules®, Sealing Products’ RTU style. With the main body of the seal molded from high performance polyurethane, this seal, incorporates a dynamically designed nitrile energizer and a tough polyacetal anti-extrusion ring. RTUB is capable of, pressures up to 10,000 psi in approved applications. Please consult Hercules Engineering for pressures above 6,000, psi.

The secondary sealing lip located behind the primary sealing lip improves stability of the seal in the gland. The unique profile of the NBR energizer ensures the primary sealing lips maintain contact under low or no pressure situations while ensuring proper sealing at higher pressures. The Hallite 621 also incorporates an acetyl anti-extrusion ring to withstand side loads and extreme pressure peaks even with the extrusion gaps.

94A Durometer | Urethane Material | 5 in Nominal Inner Diameter | 5/16 in Cross Section | U-Seal

US-90URE-2-3/4×3-1/4×1/4

US-90URE-3-1/2×4×3/8

US-90URE-3-3/4×4-1/2×1/2

US-90URE-1×1-3/8×1/4

Style DPU-BHT piston seals are molded in Freudenberg® AU 30000 urethane. Specifically designed as piston seals,, these u-seals are engineered to seal on their outside diameter. They offer extended service life and maximum reliability, in piston sealing. This high tear-resistant urethane demonstrates stability throughout a wide range of temperatures., In addition, this material is well suited to mineral and biodegradable hydraulic fluids as well as being resistant to, hydrolysis.

94A Durometer | Urethane Material | 3 1/2 in Nominal Inner Diameter | 1/4 in Cross Section | U-Seal

Specifically designed as piston seals, these u-seals are engineered to seal on their outside diameter. They offer extended, service life and maximum reliability in piston sealing.

92A Durometer | Urethane Material | 7 1/4 in Nominal Inner Diameter | 3/8 in Cross Section | U-Seal

Specifically designed as piston seals, these u-seals are engineered to seal on their outside diameter. They offer extended, service life and maximum reliability in piston sealing.

92A Durometer | Urethane Material | 9 in Nominal Inner Diameter | 1/2 in Cross Section | U-Seal

Style DRTU-BHT rod seals are molded in Freudenberg® AU 30000 urethane. These seals are specifically designed, with a second lip on their inside diameter and engineered to attain maximum life and reliability in dynamic rod sealing., This feature results in reduced leakage, less friction, increased stability, and prevents air and contaminants from, entering the cylinder. This high tear-resistant urethane demonstrates stability throughout a wide range of temperatures., In addition, this material is well suited to mineral and biodegradable hydraulic fluids as well as being resistant to, hydrolysis.

94A Durometer | Urethane Material | 4 in Nominal Inner Diameter | 1/4 in Cross Section | U-Seal

Features

• General purpose rod seal
• Robust design
• Excellent wear resistance
• Increase seal stability
• Performs well over wide temperature range and is extremely effective in low temperatures
• Primary lip protection
• Easy to install