Multi-Stage American Standard Telescopic Hydraulic Cylinder

A 5-stage telescopic cylinder can raise a 60-ton dump body from a retracted length of less than 60” — impossible with any single-stage design.

Double-acting telescopic cylinders enable precise boom extension and retraction with full controlled-force retract — essential for aerial safety in elevated work platforms.

Stage and concert production lifts require smooth, synchronised multi-stage extension with zero stick-slip — our precision-honed sleeves deliver exactly that performance.

Engineering a multi-stage telescopic cylinder that extends smoothly under load requires precise stage-to-stage clearance control, inter-stage seal geometry, and stop-ring load distribution analysis. EVER POWER's telescopic cylinder design team uses FEA-validated stage wall thickness and proprietary inter-stage seal kits that eliminate progressive seal extrusion failure at maximum extension. Our 60,000 m² facility runs a dedicated telescopic cylinder assembly and test line where every unit is cycled 50 times at full rated pressure before shipment. Custom stage counts, front-clevis or rear-flange bases, and integrated position sensors are all available as standard engineering options from EVER POWER's telescopic cylinder program.

• FEA-validated stage wall thickness
• Proprietary inter-stage seal geometry
• 50-cycle full-pressure factory acceptance test
• Integrated position sensor option available

“We switched our tipper trailer fleet from a competing supplier to EVER POWER three years ago. The telescopic cylinders have run without a single stage-seal failure across 120 units.”

— Fleet Director, Bulk Materials Haulage Company, Australia

“The double-acting telescopic cylinder for our mobile crane was engineered to exactly our retracted-length envelope. Extension is completely smooth at all load conditions.”

— Chief Engineer, Mobile Crane Manufacturer, South Korea

A: Standard production covers 2-stage through 5-stage configurations. Beyond 5 stages requires engineering review; contact our team to discuss your specific extended and retracted length requirements.

A: A single-acting cylinder uses hydraulic pressure to extend and gravity (or load weight) to retract — common in dump trucks. A double-acting cylinder uses hydraulic pressure for both extend and retract, providing controlled force in both directions — required for crane boom and aerial platform applications.

A: EVER POWER uses a proprietary dual-lip inter-stage seal geometry with an anti-extrusion back ring. This prevents the progressive seal deformation under combined pressure and bending load at full extension that causes premature seal failure in conventional designs.

A: Yes. Magnetostrictive and resistive-strip position transducers can be integrated into the cylinder assembly for feedback to PLC or machine control systems. Specify your required output signal (0–10V, 4–20mA, or CANbus) at time of inquiry.