Hydraulic Rail Stretching Machine Railroad tensioner Railway equipment Automatic pump

It's used for rail stress relief, seamless long-rail relaying, repairing broken rails (re-welding in situ) and section adjustment of track seams by stretching rails to the locking length before re-locking.

It is suitable for rail types of 50 kg/m, 60 kg/m and 75 kg/m.

Model LG-900: working pressure 67 MPa, maximum tensile force 900 kN, cylinder stroke 500 mm, locking form: wedge iron lock.

When the field temperature is lower than the rail locking temperature, the machine stretches the zero-stress length of the rail to the length corresponding to locking temperature, then the rail is re-locked (clamped) so the rail head surface is protected while the required stress state is obtained.

Yes. The machine enables re-welding in situ by stretching and locking the rail to the required length, saving time and labor compared with inserting short rails.

It operates with a hydraulic system driven by an automatic hydraulic pump (hydraulic power unit). Confirm with the supplier whether the pump and power unit are included or supplied separately and the required power specification.

Yes. The design emphasizes light weight, simple and convenient manipulation, and multiple configurations to meet different field needs. Operators should still be trained in safe use.

Always use appropriate PPE, ensure personnel are trained, never exceed the rated working pressure (67 MPa) or maximum tensile force (900 kN), verify correct clamping/locking before applying force, keep bystanders clear, and follow local railway safety procedures.

Perform regular inspection of hydraulic hoses, seals and fittings; maintain hydraulic fluid level and quality; clean and lubricate moving parts; inspect the wedge lock and clamping surfaces for wear; and replace worn parts promptly.

No. The machine is designed to lock the rail waist (not the head), which prevents damage to the rail head surface during stretching and locking.

Yes. It is suitable for stress relief and adjustment on seamless tracks, and for section adjustment of track seams on conventional tracks.

Typical accessories include hydraulic hoses, clamps/grips sized for different rail profiles, wedge locks, and the hydraulic pump/power unit. Multiple configurations are available to suit different field methods—contact the supplier for specific accessory lists and options.

The machine is intended for use when field temperature is below the rail locking temperature and is designed to expand the operable rail temperature range. For specific operating temperatures and limits relative to rail locking temperatures, consult the supplier or engineering guidelines.

Contact the manufacturer or authorized distributor for current pricing, lead times, spare-part lists, training options and warranty terms. Provide rail profile and project details so they can recommend the correct configuration.