Changzhou LongXiang Gas Spring Co.,Ltd

Lockable gas springs combine lifting assistance with the ability to hold a component at a selected position. LONGXIANG GAS SPRING supplies lockable solutions for medical equipment, adjustable furniture, vehicle seating and industrial mechanisms. A key selection decision is whether the application needs rigid locking or elastic locking.

How Lockable Gas Springs Work

A lockable gas spring contains pressurized nitrogen, a piston, oil and an internal valve controlled by a release pin. When the release mechanism is activated, the valve opens and the piston rod can move. Releasing the control closes the valve and holds the rod at the selected position.

The internal medium determines the feel after locking. Oil is nearly incompressible and provides a firm stop, while gas can compress slightly and creates cushioned movement.

Rigid Locking

Rigid locking minimizes movement after the valve closes. It is appropriate when a platform, backrest, table or machine component must remain stable under changing loads. Typical applications include treatment chairs, operating tables, rehabilitation equipment and industrial fixtures.

The required locking force must exceed the maximum external force with a suitable safety margin. LONGXIANG GAS SPRING recommends confirming whether locking strength is required in the extension direction, compression direction or both, because these ratings may differ.

Elastic Locking

Elastic locking allows limited spring-like movement after locking. The trapped gas compresses slightly when the load changes, providing a more comfortable and forgiving response. This behavior is useful for seats, backrests and ergonomic furniture where controlled compliance can reduce shock.

Elastic locking does not mean weak locking. A correctly selected unit can hold position while allowing a small amount of designed movement. It should not be used where nearly zero displacement or precise fixture positioning is required.

Selection Factors

Start with the required behavior after the operator releases the control. Choose rigid locking if movement could create a safety or accuracy problem. Choose elastic locking when cushioning improves comfort or absorbs impact.

Then calculate extension force from the moving weight, center of gravity, hinge position, mounting points and operating angle. Measure extended length, compressed length and stroke, including end fittings. Independent mechanical stops should prevent the gas spring from becoming the end stop. See the LONGXIANG GAS SPRING product range for available configurations.

Release and Installation

The release pin must move through its specified travel without side load. Controls may use a lever, cable, button or custom linkage. Cables should avoid tight bends that increase friction. The control must fully open the valve and return reliably when released.

• Keep both mounting points aligned through the full stroke.

• Protect the piston rod from scratches, paint, dirt and welding spatter.

• Use brackets and fasteners rated for the peak load.

• Test the mechanism at minimum and maximum operating loads.

• Replace a unit that drifts, leaks or locks inconsistently.

Frequently Asked Questions

Can a lockable gas spring hold any position?

It can lock within its usable stroke when the applied load remains below the rated locking force and the valve closes correctly.

Is rigid locking always safer?

No. Safety depends on load direction, geometry, brackets, controls and failure consequences. Some equipment also requires a separate mechanical restraint.

What information is needed for selection?

Send the moving weight, dimensions, hinge position, stroke, load direction, desired locking feel, temperature and cycle rate through the LONGXIANG GAS SPRING contact page.

Conclusion

Rigid locking prioritizes positional stability, while elastic locking provides controlled compliance. LONGXIANG GAS SPRING evaluates force, locking direction, geometry, release design and installation conditions together to recommend a practical solution.