Constant Force Spring for Fire Damper – Stainless Steel OEM Manufacturer
Fire Damper Constant Force Spring – Stainless Steel OEM

SEME manufactures several types of constant force springs, which cover thickness 0.06-0.6mm, width 2-55mm.
SEME constant force springs are made of SUS 301 stainless steel strip, when the strip is coiled by the spring coiling machine, the constant force spring is formed and generates uncoiling force, which features constant tension and retraction force.
SS301 Fire Damper Constant Force Spring

Measurements:
| Thickness: | 0.1mm~0.6 | Width: | 19.05mm or customized |
| Inner Diameter: | 13.5mm | Outer Diameter: | 23.6mm |
| Lenth: | 320mm | ||
| Applications: | Electronic equipment | Fire Dampers |
Products Description:
constant force springs play an integral role in the operation of fire dampers. Fire dampers typically use springs to hold the damper blades in the open position, allowing air to flow freely through the HVAC system. When the damper receives a signal from a fire alarm or other detection system, a spring is released and the damper blades close, preventing the spread of smoke and fire through the HVAC system.
Products Features:

Corrosion resistance, high strength, good plasticity.
high heat resistance, low temperature resistance, non-magnetic etc.
Provides consistent force, smooth operation and a compact design to effectively prevent the spread of smoke or fire in ductwork.
Material:Stainless steel 301.
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Product Applications

Frequently Asked Questions
1. Who are we?
We are Dongguan SEME Hardware, a professional manufacturer of custom springs and metal stamping parts based in Guangdong, China. Founded in 2015, we export to North America, Europe, the Middle East, and beyond.
2. How do you guarantee quality?
We provide pre-production samples for approval before mass production, and every shipment is fully inspected before leaving our factory.
3. What products can I buy from you?
Constant force springs, spring clips, stamping parts, Pilates springs, plastic components, and more. Custom orders are welcome.
4. Why should I choose you?
Honesty, fairness, and customer satisfaction are our core promises. We offer high-quality products at competitive prices to meet your needs.
5. What services do you provide?
Delivery: FOB, CIF, EXW
Payment: T/T, PayPal, Western Union
Languages: English, Chinese
Packaging & Delivery

Inner packaging: PE bag (or as required)
Outer packaging: Carton box (or as required)
Delivery: According to contract terms
About SEME Hardware

Dongguan SEME Hardware Spring Products Co., Ltd. has been manufacturing custom springs, clips, and stamping parts since 2015. We export to over 20 countries and serve industries such as automotive, electronics, agriculture, and kitchen appliances.
We provide OEM services and fully customize products according to your requirements.
Contact us today – we’ll be your best choice.
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📧 Email: [email protected]
📞 WhatsApp / WeChat: +86 186 6511 1545
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