Lockable gas springs are used on medical EVA walkers to adjust and lock the height of forearm supports, handles, and upper-body support systems. This allows therapists and caregivers to quickly adjust the walker to suit different users while preventing sudden drops in height during rehabilitation.
GASTAC offers locking gas springs in various sizes, providing safer gait training, easier adjustment, and greater comfort for both children and adult patients.
Key Benefits of Lockable Gas Springs in Medical EVA Walkers
When integrated into medical EVA walkers, lockable gas springs provide several important benefits for patients, caregivers, and rehabilitation professionals. The following are the most notable advantages.
Quickly adjust the support height to suit different users.
Stability of locking position during gait training.
The locking gas spring can support a weight of up to 800N, reducing the physical exertion of caregivers.
Install in different positions and angles to suit patient comfort.
Improve safety and prevent secondary harm to patients.
Supports multi-user operation to set height, requiring no manual maintenance.
Process to Choose the Appropriate Locking Gas Springs
Selecting the right locking gas spring for a medical EVA walker is essential to ensure safe adjustment, stable positioning, and reliable long-term performance. A structured evaluation helps manufacturers and designers match the gas spring specifications with real rehabilitation use conditions. The following steps are commonly used in the selection process:
- Determine the patient’s height range and the adjustment range of the EVA Walkers.
- Determine the patient’s weight and the required initial force range for the EVA Walkers.
- Select appropriate gas spring end fittings and a Bowden cable system.
- Conduct prototype testing to verify motion smoothness and locking reliability under load.
- Confirm compliance with medical durability and service life requirements.
Relationship Between User Weight and Locking Gas Spring Force Range
In medical EVA walkers, user body weight is supported by the overall structural system, while locking gas springs are used to assist adjustment and maintain stable positioning. They are not designed to carry full body weight, but to provide controlled force during height and angle adjustments.
The following table shows typical gas spring force ranges based on different user weight groups:
User Weight vs Locking Gas Spring Force
| User Group | User Weight Range | Locking Force Range |
|---|---|---|
| Children | 15 – 40 kg | 100 – 200 N |
| Adolescents | 30 – 60 kg | 220 – 400 N |
| Adults | 50 – 80 kg | 400 – 600 N |
| Obese / Heavy Users | 70 – 120 kg | 600 – 800 N |
Locking gas springs in EVA walkers are assisting components for adjustment and positioning, and their force is selected based on mechanical requirements rather than user body weight alone.
Relationship Between User Height and Lockable Gas Spring Stroke Range
In medical EVA walkers, locking gas spring stroke is not directly calculated from user height. Instead, it is determined by the mechanical movement required by each adjustment structure, such as height columns, support arms, and positioning joints. User height is only used as a reference to define the overall adjustment range of the equipment, not to directly define gas spring stroke.
User Groups vs Gas Spring Stroke
| User Group | Locking Gas Spring Stroke Range | Applicable User Height Range |
|---|---|---|
| Children | 80 – 150 mm | 80 – 120 cm |
| Adolescents | 100 – 200 mm | 100 – 165 cm |
| Adults | 180 – 400 mm | 150 – 190+ cm |
Lockable gas spring stroke in EVA walkers is determined by mechanical adjustment design requirements, while user height only serves as an application reference range rather than a direct calculation basis.
GASTAC Locking Gas Springs for EVA Walkers Specifications
As explained earlier, user body weight does not directly correspond to gas spring force, and user height does not directly define gas spring stroke. Both parameters are determined by the EVA walker’s mechanical design and adjustment structure.
Below is the standard range of locking gas springs provided by GASTAC for EVA walker applications:
| GASTAC Part Number | Rod / Tube Dia. (mm) | Stroke (mm) | Extended Length (mm) | Force Range (F1) |
|---|---|---|---|---|
| EW1022080230200 | 10/22 | 80 mm | 230 mm | 100 - 200 N |
| EW1022120320400 | 10/22 | 120 mm | 320 mm | 200 - 400 N |
| EW1022150400400 | 10/22 | 150 mm | 400 mm | 200 - 400 N |
| EW1022200520600 | 10/22 | 200 mm | 520 mm | 400 - 600 N |
| EW1022250630600 | 10/22 | 250 mm | 630 mm | 400 - 600 N |
| EW1022300750800 | 10/22 | 300 mm | 750 mm | 600 - 800 N |
| EW1022350850800 | 10/22 | 350 mm | 850 mm | 600 - 800 N |
| EW1022400950800 | 10/22 | 400 mm | 950 mm | 600 - 800 N |
How to Measure a Locking Gas Spring?
Now that the standard specifications of locking gas springs for EVA walkers are clear, the next step is understanding how to correctly measure a locking gas spring. Proper measurement is essential to ensure accurate replacement, correct fitting, and reliable performance in real applications.
The following are the key parameters that need to be measured:
- Extended Length: Measure from the exact center of one mounting hole to the center of the other when the spring is fully pulled out. If using threaded fittings without eyelets, measure from the end of the threads on the rod to the center of the mounting point.
- Stroke Length: This is the difference between the extended and compressed lengths. It represents how much the rod travels in and out.
Rod / Body Diameters: Use a digital caliper to measure the width of the thin piston rod and the thickness of the main cylinder barrel.
End Fittings: Note the style (e.g., ball socket, gas spring eyelet, or joint clevis) and the thread or hole size.
The force (usually measured in Newtons (N) or pounds-force (lbs)) is typically stamped on a label on the cylinder body.If the label is worn off, you can calculate it using the object’s weight, the lever arm length, and the mounting distances, or consult the manufacturer’s force calculator (1lb ≈ 4.482N).
End Fitting Gas Springs for EVA Walkers
As mentioned above, end fittings are an essential part of locking gas spring systems. They work together with the gas spring to enable smooth height adjustment and stable positioning in EVA walkers.
Below are the standard end fitting options provided by GASTAC for gas springs used in EVA walker applications.
Gas Spring End Fittings
XHJ001
XHJ002
XHJ003
Bowden Cables
GTBD001
GTBD002
GTBD003
Locking Gas Spring Release Button
BS002
BS004
AN002
If you would like to get more information regarding our product range, please feel free to visit the GASTAC online store or contact us at any time. Our team is ready to assist you, and you can easily request a detailed product PDF catalog to find the perfect specifications for your project.
How to Choose High Quality Locking Gas Springs
High quality locking gas springs for EVA walkers should be selected based on key engineering and durability factors to ensure safe, stable, and long-term performance in medical rehabilitation applications. Key selection criteria include:
- Use high-strength carbon steel and precision seamless steel tubing for cylinder construction
- High-quality piston rod with hard chrome plating for wear and corrosion resistance
- Stable locking mechanism with zero-position drift under static load
- Cycle life tested up to 25000 cycles or more under full load conditions (e.g., ~10 height adjustments per day, long-term stable operation over 1+ year use)
- Smooth damping performance without stick-slip during extension and compression
- Compatibility with Bowden cable release systems and end fitting assemblies
- Verified performance under medical safety and rehabilitation equipment standards
How to Choose a Locking Gas Spring Manufacturer
Choosing a reliable locking gas spring manufacturer is critical to ensure consistent product quality, stable performance, and long-term supply reliability for EVA walker applications. A qualified manufacturer should demonstrate strong engineering capability, strict quality control, and proven experience in medical or rehabilitation equipment. Key evaluation factors include:
With a proven track record of serving over 500 medical industry clients, we have established long-term partnerships with leading brands.
Factory scale with over 10,000 m² production facility and 100+ employees, including engineering, production, and quality control teams
- Compliance with international quality and safety standards (e.g., ISO certification)
- Production capacity of 5,000 gas springs every two weeks.
- Strict tolerance control for consistent force output across production batches (Error within 0.2%)
- Verified cycle life testing and durability performance reports
- Reliable after-sales service and technical support for long-term cooperation
Get Your EVA Walker Gas Spring Quote Today
As a leading global locking gas springs manufacturer, GASTAC can help you choose the right specifications, whether you need to replace a lockable gas spring or customize a solution for a brand new EVA walker project.
Please send your drawings, dimensions, or performance requirements now, and our engineering team will provide you with recommended solutions and quotes.
Other GASTAC Locking Gas Springs Projects
GASTAC is one of the leading locking gas spring manufacturers in China. In addition to EVA walker and rehabilitation applications, the company also serves a wide range of industries with mature engineering and manufacturing experience.
Below are the application industries where GASTAC has established proven project experience:
Locking Gas Springs Massage Bed Project
- Locking Gas Springs Ambulance Stretchers Project
- Locking Gas Springs Tractor Tilt Steering Wheels Project
- Locking Gas Springs Movie Theater Seats Project
- Locking Gas Springs Barber Chairs Project
- Locking Gas Springs Wheelchairs Project
- Locking Gas Springs Pneumatic Standing Desks Project
- Locking Gas Springs Dialysis Chairs Project
- Locking Gas Springs Recliner Chairs Project
- Locking Gas Springs Hospital Bassinets Project
- Locking Gas Springs Amtrak Coach Seats Project
- Locking Gas Springs Truck Seats Project
- Locking Gas Springs Chairs Car Seating in Train Project
- Locking Gas Springs Coach Seats Project
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