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Changzhou Fenglan New Materials Co., Ltd.

Tension Gas Spring

-- Steady & Reliable Manufacturer --

Introduction

A tension gas spring — also called a pull gas spring or extension gas spring — works in the opposite direction to a conventional compression spring. Instead of pushing the rod outward, it pulls the rod back into the cylinder when released, generating a controlled pulling force. This makes it the preferred solution for applications that require a component to be held closed, retracted, or pulled toward a neutral position.

Fenglan tension gas springs are charged with high-purity nitrogen gas and feature precision-machined steel cylinders, chrome-plated piston rods, and high-quality polymer seals rated for long service life. They are available in a wide range of force values, stroke lengths, and end fitting configurations to suit diverse OEM and aftermarket requirements.

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Specifications

Cylinder Diameter 10 mm – 50 mm
Stroke Length 20 mm – 500 mm
Extension Force (F1) 50 N – 3,000 N
Operating Temperature -30°C to +80°C
Rod Material Chrome-plated carbon steel / Stainless steel 304
Cylinder Material Carbon steel (zinc-plated) / Stainless steel 304
Seal Material NBR / FKM (Viton®)
End Fittings Ball socket, clevis, threaded stud, fork — customizable
Surface Treatment Zinc plating, powder coating, or stainless passivation
Certifications ISO 9001 / REACH / RoHS

Applications

  • Furniture & Ergonomics: Reclining chairs, sofa mechanisms, and height-adjustable furniture that require a pull-back restoring force.
  • Medical Devices: Hospital bed frames, dental chairs, and rehabilitation equipment where controlled retraction supports patient safety.
  • Automotive: Glove box latches, trunk lids, and interior panel mechanisms that must remain closed under normal driving vibration.
  • Industrial Machinery: Guard doors, safety shields, and clamping systems that rely on a constant tensile force to stay in position.
  • Aerospace & Marine: Hatch covers and stowage compartments requiring reliable retraction in demanding environments.

Advantages

  • Controlled Pull Force: Provides a steady, predictable tensile force that keeps components securely in the closed or retracted position — no springs to fatigue or cables to fray.
  • Long Service Life: Nitrogen gas does not degrade, and precision seals maintain pressure for over 50,000 operating cycles under normal conditions.
  • Compact & Lightweight: A slender cylinder replaces bulky mechanical spring assemblies, reducing weight and simplifying installation.
  • Fully Customizable: Force value, stroke, end fittings, and surface finish are all adjustable to match your exact design requirements.
  • Low Maintenance: Sealed gas charge requires no lubrication or adjustment throughout the product's service life.
  • Wide Temperature Range: Performs reliably from -30°C to +80°C, suitable for both indoor and outdoor environments.

Payment & Shipping

We accept T/T (bank transfer), PayPal, Western Union, and L/C at sight for orders above USD 5,000. A 30% deposit is required upon order confirmation, with the 70% balance paid before shipment. All prices are quoted EXW or FOB Ningbo by default; CIF and other Incoterms are available upon request.

Standard lead time is 15–25 business days for stock items and 30–45 days for customized orders. We ship worldwide via sea, air, or express courier (DHL / FedEx / UPS). Full tracking information and packing lists are provided with every shipment. MOQ and bulk discounts are negotiable — please contact our sales team for a tailored quotation.

Frequently Asked Questions

  • Q: What is the difference between a tension gas spring and a compression gas spring?
  • A: A compression gas spring pushes its rod outward (extension force), while a tension gas spring pulls the rod inward (retraction force). Choose a tension type when you need a component to return to a closed or retracted state without external assistance.
  • Q: Can I specify a custom force value?
  • A: Yes. We manufacture tension gas springs in force increments starting from 50 N up to 3,000 N. Share your application details and our engineering team will recommend the optimal specification.
  • Q: What end fittings are available?
  • A: We offer ball sockets, clevis brackets, threaded studs (M6–M14), eye brackets, and fork mounts. Custom end fittings can be produced for OEM orders with sufficient quantity.
  • Q: How should a tension gas spring be installed?
  • A: Mount the cylinder end to the fixed structure and the rod end to the moving component. Ensure the rod faces downward or horizontally when possible to protect seals. Follow our load-calculation guide for correct geometry.
  • Q: What is the minimum order quantity?
  • A: The MOQ for standard catalogue items is 50 pcs per specification. For fully customized designs, MOQ and pricing are discussed based on tooling requirements.
Changzhou Fenglan New Materials Co., Ltd.
Changzhou Fenglan New Materials Co., Ltd.
Changzhou Fenglan New Materials Co., Ltd.
Changzhou Fenglan New Materials Co., Ltd.
Changzhou Fenglan New Materials Co., Ltd.
Changzhou Fenglan New Materials Co., Ltd.
Changzhou Fenglan New Materials Co., Ltd.
Changzhou Fenglan New Materials Co., Ltd.
ABOUT US
Quality is Our Core Competitiveness
Changzhou Fenglan New Materials Co., Ltd.
Founded in 2010, As China Tension Gas Spring Manufacturers and Tension Gas Spring Company. we are dedicated to manufacturing precision parts for automotive, industrial, and electrical applications. Backed by advanced manufacturing and R&D, we provide high-quality products and trusted solutions to our clients. We provide a wide selection of components to meet diverse industry needs: Electric Shafts: Drive shafts, coil motor shafts, servo motor shafts, water pump motor shafts, industrial motor shafts, and magnetic levitation motor shafts. Hardware: Precision parts for medical equipment, water heater coils, plumbing fittings, and various gas springs. Our commitment is to support our customers with reliable performance and long-term value.
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