High-performance Bidirectional Seal SELF-ACTUATING, PRESSURE-ACTIVATED The Greene, Tweed Ener-Cap® II isa self-actuating, pressure-activated hydraulic seal that optimizes cap seal performance within standard Aerospace seal glands. The Ener-Cap II HP includes one or two anti-extrusion rings to give higher pressure capabilities by preventing extrusion of the PTFE sealing element. The cap seal design results in low breakout and running friction and minimal leakage over an extended service life, making this seal design ideal for dynamic The PTFE-type sealing element and advanced-design elastomeric energizer provide optimum radial squeeze and evenly distributed radial loading. This design gives a high degree of seal stability and extended service life. Our Avalon® materials offer exceptional performance. A custom-molded energizer ensures correct squeeze levels are maintained. The addition of circumferential cap grooves will improve the lubrication and reduce outboard leakage. Operating temperatures can range from -80°F to 450°F (-62°C to 232°C) with pressures to 4,000 psi (276 bar), dependent upon the selected materials and hardware clearances. The Ener-Cap II HP extends the working pressures significantly and operates success- Double-Acting Piston

FEMURES & BENEFITS • Capable of sealing pressures up to 4,000 psi (276 bar) without backups, easing installation of other multi-component seals • Specially designed elastomeric energizer supports even sealing force distribution promoting better sealing performance • Low break out and running friction • Long life and low friction of the Avalon® material extend service life • Retrofits existing gland to the MIL-G-5514/AS4716 standards • Primary and secondary flight controls • Linear utility actuators • Landing gear actuation systems The Ener-Cap II is available for rod or piston applications in...

Both piston and rod type 52 series Ener-Caps can be supplied with notches for blow by protection, in accordance with SAE AIR 1243. Greene, Tweed has designed the 5279 series of Ener-Cap II HP to combine the long-life, low-friction properties of the Ener-Cap II with the high shear strength back-up capabilities of a back-up ring. This allows the seal to be used at pressures in excess of 4000 psi (276 bar). The Ener-Cap II HP is available for rod and piston applications in standard one back-up and two back-up glands only. Contact GT engineering for specific part numbers. Circumferential Grooves...

ENER-CAP® 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. 00 = Standard, no notches, no grooves NO = Standard with radial notches GO = Standard with circumferential grooves BO = Standard with notches and grooves Part Numbering Examples Bore diameter gland width with radia gland width Contact your local Greene, Tweed representative for specific recommendations to suit higher performance requirements. The original Ener-Cap design, 59 series, has been replaced by 52 series...