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China Speedy Floor Spring Manufacturer – D-7300 Single Engine Cylinder Floor Spring – Dorrenhaus

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With our leading technology also as our spirit of innovation,mutual cooperation, benefits and development, we are going to build a prosperous future jointly with your esteemed company for Panic Door, Door Closures, Norton Hold Open Door Closer, We wholeheartedly welcome customers all over the world come to visit our factory and have a win-win cooperation with us!
China Speedy Floor Spring Manufacturer – D-7300 Single Engine Cylinder Floor Spring – Dorrenhaus Detail:

We are a professional Door spring manufacturer and supplier in China, specializing in providing high quality customized products. We warmly welcome you to wholesale bulk Door spring stock from our factory. Contact us for free samples.

Our value message is QUALITY and SERVICE
10 years of hardware manufacturing experience
Can customized any size and color
Compensation if late delivery or bad quality
Competitive prices
Experienced professionals
24 hours online after-sales service
OEM &ODM offered
We boast our own R & D, production, exports, and logistics team

Performance parameters of D-7300
Model D-7300
Applicable Standard
Engine Cylinder Single
Max Door Width 1200mm
Max Door Weight 150kg
Max Open Degree 135°
Stop-Device 90°
Latching Speed Adjustment 0°-20°
Closing Speed Adjustment 20°-90°
Application Temperature  -40° to 60°
Dimension:Length*Width*Height 273mm*126mm*70mm
Material of Cover Plate 304SS or 201SS
Thickness of Cover 1.2mm
Finish SSS/PSS/Matt Black
Service Life Over 500,000cycles
Warranty 3 years

A floor spring is typically concealed under the floor to operate a door which requires to be closed after use, for reasons including convenience, safety or security.

Floor springs operate using what we call a CAM action mechanism. When the door is opened, regardless of in which direction, the bottom arm, which is fixed to the door, rotates the CAM spindle. This, in turn, rotates the CAM itself. The CAM is connected to the piston and, when it’s rotated, pulls the piston head


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China Speedy Floor Spring Manufacturer –  D-7300 Single Engine Cylinder Floor Spring – Dorrenhaus detail pictures

China Speedy Floor Spring Manufacturer –  D-7300 Single Engine Cylinder Floor Spring – Dorrenhaus detail pictures

China Speedy Floor Spring Manufacturer –  D-7300 Single Engine Cylinder Floor Spring – Dorrenhaus detail pictures

China Speedy Floor Spring Manufacturer –  D-7300 Single Engine Cylinder Floor Spring – Dorrenhaus detail pictures

China Speedy Floor Spring Manufacturer –  D-7300 Single Engine Cylinder Floor Spring – Dorrenhaus detail pictures


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It adheres on the tenet "Honest, industrious, enterprising, innovative" to develop new items frequently. It regards buyers, success as its very own success. Let us produce prosperous future hand in hand for China Speedy Floor Spring Manufacturer – D-7300 Single Engine Cylinder Floor Spring – Dorrenhaus , The product will supply to all over the world, such as: Victoria, Armenia, Thailand, Being the top solutions of our factory, our solutions series have been tested and won us experienced authority certifications. For additional parameters and item list details, be sure to click the button to acquire additional nformation.
  • The customer service reprersentative explained very detailed, service attitude is very good, reply is very timely and comprehensive, a happy communication! We hope to have a opportunity to cooperate.
    5 Stars By Riva from Mombasa - 2017.11.20 15:58
    Managers are visionary, they have the idea of "mutual benefits, continuous improvement and innovation", we have a pleasant conversation and Cooperation.
    5 Stars By Rosalind from Philadelphia - 2017.01.28 19:59
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