Hydraulic Cylinder Classification & Selection Guidelines
Hydraulic cylinders cover various types based on structure, mounting style and working conditions. Proper selection greatly influences equipment stability and service life.
Common Classifications
By action type
- Double-acting cylinder: Pressure oil can be supplied on both sides to realize active extension and retraction, which is the most widely used type.
- Single-acting cylinder: Pressure oil feeds one side only; retraction relies on load weight or spring return with simpler construction.
By structure
- Tie rod cylinder, engineering cylinder, telescopic multi-stage cylinder, servo test cylinder and so on. Multi-stage cylinders are adopted for long stroke with limited installation space. Servo cylinders feature high precision and low friction, mainly used in testing equipment.
By mounting method
- Clevis mounting, flange mounting, ball joint mounting. Different structures adapt to different force angles and prevent premature seal damage caused by side load.
Main Selection Criteria
Confirm rated working pressure, stroke and installation dimensions; calculate required thrust and speed. Choose dust-proof or anti-corrosion configurations according to working environment. Seals need upgrading under high temperature, dusty or humid conditions. Custom cylinders support customized bore, rod diameter, connection size and cushion structure as per drawings. Accessories such as position sensors and cushion valves can be equipped to meet special equipment requirements.
