Single Acting Hydraulic Cylinder

Single-acting hydraulic cylinders provide simple and cost-effective linear actuation for applications requiring force in only one direction. These cylinders operate by pressurized hydraulic fluid extending the piston, while relying on internal springs, external loads, or gravity to return the rod. Their straightforward design offers several advantages including reduced component count, lower maintenance requirements, and compact installation footprints compared to double-acting models. Typical force capacities range from 100kg to 50 tons, with stroke lengths up to 2 meters in standard configurations.  

 

Common applications include agricultural machinery such as plow lifts and harvester components where the equipment's weight naturally provides the return force. Industrial presses utilize them for ejector mechanisms, taking advantage of the spring return feature for reliable cycling. Construction equipment like dump trucks employ gravity-return versions for bed lifting, where the raised position is maintained hydraulically and lowering occurs through weight alone. Automotive systems integrate compact single-acting cylinders in brake boosters and hood/trunk release mechanisms where space constraints exist.  

 

These cylinders excel in environments where simplicity and reliability are prioritized over bidirectional control. Their sealed designs withstand harsh conditions including dust, moisture, and temperature extremes from -30°C to 120°C. The absence of complex valving and reduced hydraulic connections minimize potential leak points, making them ideal for mobile equipment and remote installations. While limited to unidirectional force applications, their robust construction and economical operation ensure continued use across industries where the return stroke doesn't require precise control or significant force.