New L20 Series Hydraulic Rotary Actuators

ENUMCLAW, Washington — Helac Corporation has announced the introduction of its new L20 Series hydraulic rotary actuators. The L20 Series was specifically designed as an economical, ultra-compact, lighter weight, high torque rotary actuator that can effectively be used as an alternative to hydraulic cylinders. The L20 Series features large, integral bearings that can support and rotate heavy loads without the need for additional, external bearings. The large diameter shaft flange with drilled and tapped bolt circle permits loads to be securely bolt-mounted directly to the actuator. The shaft also features a hollow bore that reduces weight and can be used as a secondary load path or passage for hydraulic hoses, electrical wiring, etc. The L20 Series is exceptionally resilient to shock loads. Zero leakage seals have eliminated internal bypass and external leakage, assuring positive performance and permitting selected positions to be maintained without drift. A foot mounting configuration with 180 degree rotation is standard. Five models are available with torque output to 39,000 IN-LB at 3000 psi (4,410 Nm at 210 bar). Very compact, direct mounted, integral counterbalance valves can be provided as a factory-installed standard option. Custom engineering is available.

The L20 Series is part of Helac's new "LoadBear" product line -- compact, high torque rotary actuators, unique in their ability to carry and rotate heavy radial, moment, and thrust loads without the need for additional, external bearing support, hence the name "Load Bear (ing)".

(US Pats 4422366, 5447095, 5671652, and corresponding international patents.)