Piston Seals

Designed to fit on one or two piece pistons, this piston seal employs a nitrile seal for high sealability, nylon split backups for extrusion resistance, and two split bearing rings. No further support bearings are required.

90A Durometer | Nitrile Material | 2 5/8 in Nominal Inner Diameter | Piston Seal

Features

• Easy assembly
• Low friction capabilities

Designed to fit on one or two piece pistons, this piston seal employs a nitrile seal for high sealability, nylon split backups for extrusion resistance, and two split bearing rings. No further support bearings are required.

90A Durometer | Nitrile Material | 2.85 in Nominal Inner Diameter | Piston Seal

Features

• Easy assembly
• Low friction capabilities

Style PSA-58 piston seals combine a heavy duty, fabric reinforced seal with two polyacetal “L” bearings. This construction allows the seal to withstand pressures up to 5,000 PSI. “L” bearings also react to pressure to prevent extrusion and support the piston. For 2-piece pistons.

Fabric Reinforced Nitrile Material | 3 1/4 in Nominal Inner Diameter | Piston Seal

Features

• Easy assembly
• Low friction capabilities

Style PSA-58 piston seals combine a heavy duty, fabric reinforced seal with two polyacetal “L” bearings. This construction allows the seal to withstand pressures up to 5,000 PSI. “L” bearings also react to pressure to prevent extrusion and support the piston. For 2-piece pistons.

Fabric Reinforced Nitrile Material | 5 in Nominal Inner Diameter | Piston Seal

Features

• Easy assembly
• Low friction capabilities

Style PSA-58 piston seals combine a heavy duty, fabric reinforced seal with two polyacetal “L” bearings. This construction allows the seal to withstand pressures up to 5,000 PSI. “L” bearings also react to pressure to prevent extrusion and support the piston. For 2-piece pistons.

Fabric Reinforced Nitrile Material | 6 in Nominal Inner Diameter | Piston Seal

Features

• Easy assembly
• Low friction capabilities

Compact and easy to install, the Style PSA-65 piston seal is a simple and economical design for pressures up to 3,000 PSI. The assembly consists of a nitrile rubber seal and two polyacetal bearings to support the piston. For 1-piece pistons.

Nitrile Material | 1 1/8 in Nominal Inner Diameter | Piston Seal

Features

• Easy assembly
• Low friction capabilities

These Style PSC are molded from Fluorotrel which is a tough, wear-resistant material able to run at temperatures up to 275 °F (requires FKM energizer). Fluorotrel is also resistant to fluids that are incompatible with polyurethane such as water, glycol, water in oil, mineral oil and petroleum. Consult our Engineering Department for other fluids compatible with Fluorotrel. Piston diameter “I” dimensions are given for pistons without wear rings.

55D; 70A Durometer | Fluorotrel Material | 4 5/8 in Nominal Inner Diameter | Piston Seal

Features

• Easy assembly
• Low friction capabilities

The Style PSC is a double acting piston seal designed to replace o-rings, quad-rings, and T-seals with the same groove dimensions (O-ring dash number). Style 575 urethane back-up rings may be added to either or both sides of the “PSC” to accommodate wider groove widths. The PSC is made of 95A Durometer polyurethane, giving it high extrusion and abrasion resistance. The crowned sealing surface produces a positive seal from vacuum to high pressure. Hercules® Sealing Products also offers a wide base (WB) Style PSC piston seal. These wide base seals have the same characteristics of the standard PSC seals but offer a wider base, eliminating the need to use back-up rings to accommodate wider grooves. Piston diameter “I” dimensions are given for piston without wear rings.

95A; 70A Durometer | Polyurethane Material | 9 1/2 in Nominal Inner Diameter | Piston Seal

Features

• Easy assembly
• Low friction capabilities

These piston seals provide bi-directional, low friction sealing with increased stability and superior leakage control. The square cut energizer provides low pressure sealing and eliminates backside leakage. This seal also effectively seals between different fluids on each side of the piston seal, making gas/liquid sealing combinations possible. Piston diameter “I” dimensions are given for pistons without wear rings.

40% Bronze Filled PTFE Material | 8.16 in Nominal Inner Diameter | Piston Seal

Features

• Easy assembly
• Low friction capabilities

9.500 X 8.665 X 0.375 Piston Seal