HAHN Gasfedern tension gas spring, pulls the rod in, steel and V2A/V4A stainless

The HAHN Gasfedern tension gas spring (Gaszugfeder) works the opposite way to a gas strut: nitrogen pressure pulls the rod in, so in the unloaded state the rod is retracted. When the rod is pulled out, the volume decreases, the gas is compressed and the pulling force rises. A seal on the rod guide reduces gas loss, and a vent hole equalises pressure.

Standard models have no damping. The special ZD series has a nozzle in the piston and a defined extension speed; a version with retraction and end-position damping is available, as well as an infinitely lockable tension spring for confined spaces and high loads. Materials: steel, V2A (AISI 304) for wet environments, V4A (AISI 316) for chemical and marine use. The modular system allows adding a protective tube, seals and special end fittings.

Key features:

• Pulls instead of pushes — for kinematics where a standard strut does not fit
• Compact in confined installation spaces
• Controlled speed with the ZD version
• Stainless versions for moisture, chemicals and marine use
• Lockable version holds position over the full stroke

Specifications:

• Principle: gas pulls the rod in; rod retracted when unloaded
• Damping: standard — no nozzle; ZD — nozzle and defined speed; optional retraction damping
• Locking: infinitely lockable version for tight spaces and high loads
• Material: steel; V2A (AISI 304); V4A (AISI 316)
• End fittings: eyes, forks, ball joints from the HAHN accessory range
• Options: protective tube, special seals, valve
• Maintenance: maintenance-free system

Application: Lift exit hatches, fold-down table tops, flaps in narrow recesses and mechanisms where the mass is returned by a pulling force.

Scope of supply: Tension spring with agreed end fittings. Brackets and protective tube are separate items.

Before ordering: Before ordering, provide mass, stroke, mounting points, environment and operating temperature. The cylinder contains pressurised nitrogen: do not open or heat it.