Piston Seals

This three piece piston seal, designed for one piece pistons, contains a nitrile rubber seal with two split plastic antiextrusion rings. Under pressure, the seal exerts a wedging action on the anti-extrusion rings, reducing the clearance between the bore and the piston, minimizing extrusion. Sales part numbers ending in W include two wear rings.

Nitrile Material | 3 in Nominal Inner Diameter | Piston Seal

Features

• Easy assembly
• Low friction capabilities

PAR, 1 3/4” Loaded Lip FKM

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 | 5/16 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 | 15/16 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 | 2 1/8 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 | 2 1/2 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 | 2.755 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 | 2 3/4 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 | 3 3/4 in Nominal Inner Diameter | Piston Seal

Features

• Easy assembly
• Low friction capabilities

PA-90URE-4-1/2X5X.579