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Enerlip® & Enerlip HP

Versatile Seal for High and Low Pressures

LOW BREAKAWAY FRICTION, PRESSURE-VARIABLE SEALS

The Greene, Tweed Enerlip® and Enerlip HP are high-performance, low leakage, pressure-variable seals developed to combine low breakaway friction with ease of installation.

The unidirectional seal consists of a specially shaped elastomeric energizer with a mating PTFE-type heel bearing. At low pressure the Enerlip functions as a partially capped, single-acting elastomer lip seal. The elastomeric element’s wide footprint provides excellent sealing capability. As pressure increases, the elastomeric element is forced up the ramp of the PTFE element, reducing the elastomeric footprint length to provide lower friction and wear. At high pressure the Enerlip acts as an activated PTFE seal, with optimum sealing action at pressures from 0 to 8,000 psi (0 to 550 bar).

Features & Benefits

  • The elastomeric footprint is reduced as the elastomeric element is forced up the PTFE ramp, providing lower friction and wear
  • The wiping action of the elastomeric element provides effective leakage control compared to conventional cap seals
  • Functions as a pressure-actuated cap capable of withstanding high pressures
  • Functions as a partially capped, single-acting, elastomeric lip seal capable of withstanding low pressures
  • Provides for optimized sealing across the pressure range leading to resistance to wear and extrusion
  • Unidirectional design ensures no pressure entrapment when used in tandem seal arrangements

APPLICATIONS

  • Tandem seal design applications found in utility and landing gear actuation systems
  • Primary and secondary flight control systems

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ENERLIP® PART NUMBERING SYSTEM

The part numbering system requires the use of the material designator tables found in the next column. For nonstandard designs contact GT engineering.

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Contact your local Greene, Tweed representative for specific recommendations to suit higher performance requirements.

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ENERLIP CONFIGURATION

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ENERLIP DESIGN

Working as either a primary seal or as a secondary seal to a primary PTFE-type seal, the Enerlip seal provides low breakaway friction, reduced leakage and ease of installation. The Enerlip seal consists of a shaped elastomeric energizer with a mating PTFE-type heel bearing. The Enerlip HP has an additional anti-extrusion ring.

ENERLIP OPTIONS

The Enerlip is available for both rod and piston sealing: one backup gland width for Enerlip, two back-up gland widths for Enerlip HP. It can be installed as the primary seal or as the secondary seal to a primary PTFE-type seal such as the Greene, Tweed’s cappe ACGTL™ ring or the Ener-Cap® HP in dual sealing (vented or unvented) systems.

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