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ACT® Ring

ACT® Ring
9Pages

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ADVANCED CONCEPT T-RING SEALS Using FEA (Finite Element Analysis) and expertise in seal design, Greene, Tweed has taken the concept behind our renowned AGT® seal, optimized the design of the elastomer and anti-extrusion rings, and developed an Advanced Concept T-ring (ACT). The ACT® ring is designed with converging sides in order to promote lubrication for reduced friction and wear, with an apex for force concentration under low-pressure conditions to optimize sealing. The design also enhances oil film passage upon the retract stroke for lubrication of the apex of the elastomer. Our in-house tests demonstrate service life increases by as much as 30 percent over some alternative seal designs. FEATURES & BENEFITS Improved stability in gland, resulting in reduced stress in the elastomer for enhanced sealing performance Specially tapered elastomer side wall design reduces friction and promotes efficient seal lubrication ultimately leading to longer seal life Hydromechanically activated, anti-extrusion rings for enhanced extrusion protection at all sealing pressures The wide static footprint of the "T" geometry cross-section eliminates spiral failure Retrofits existing MIL-G-5514/AS4716 and AS4832 glands Metric series available for metric-sized designs Wedge Adapter • Actuators (e.g., door actuators) • Flight controls (e.g., spoilers, rudders, aileron, etc.) • Landing gear actuator subsystems (e.g., end caps and • Landing gear spare dynamic seals • Landing gear dynamic seals

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ACT® CONFIGURATIONS For pressures up to 4,000 psi (276 bar), we recommend standard diametrical clearances per MIL-G-5514/AS4716, providing proper gland lengths and materials are selected. Gland Dimensions Note: Refer to the dimensional ta bles for more information. Note: Custom configurations are available to suit BACS11AA. Contact GT engineering for more information. "Staged" and "Split-Lock" Anti-Extrusion Ring Set It is possible within wide-base gland arrangements to stage two different anti-extrusion ring materials on either side of the elastomeric sealing stem in order to accommodate...

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ACT® ring assemblies are designed with a transition radius between the sealing stem and the extending flanges of the elastomer. The mating corner radius in the anti-extrusion completes this unique feature, thus reducing the tensile stresses within this region and prolonging the life of the seal. "Flash Free" Option Typical O-ring and generic "T" rings are molded with a parting line around the critical ID and OD sealing surfaces. This inherent inter- ruption on the contact surface can lead to bypass seepage when sealing low molecular weight gases and liquids in low-pressure...

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ACT® PART NUMBERING SYSTEM The part numbering system requires the use of the material designator tables found on the next page. For nonstandard designs contact GT engineering. - Gland width - Elastomer Back-up compound ring materia designator designator Flash free General Part Numbering Examples zero back-up gland width gland width Flash Free Part Numbering Examples gland width Flash free *Note: The ID of the flash free option cannot be less than 0.422 in. ACT PART NUMBERING SYSTEM (METRIC SEALS) The part numbering system requires the use of the material designator tables found on the next...

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Material Designator Tables See GT Surface Finish guidelines.

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PISTON DIMENSIONAL INFORMATION (METRIC) *Note: Not recommended. If used with +0.13/-0 gland width tolerance recommended.

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Piston dimensional information continued Statements and recommendations in this publication are based on our experience and knowledge of typical applications of this product and shall not constitute a guarantee of performance nor modify or alter our standard war ran ty applicable to such products.

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ACT® Ring 9Pages

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ACT® Ring
9Pages