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China Hydraulic Floor Spring Factories – D-7300 Single Engine Cylinder Floor Spring – Dorrenhaus

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Our mission is usually to turn into an innovative provider of high-tech digital and communication devices by furnishing benefit added design and style, world-class manufacturing, and service capabilities for Exit Devices, Automatic Interior Door Closer, Commercial Door Closer Adjustment, We, with fantastic passion and faithfulness, are willing to offer you with best services and striding forward with you to make a bright foreseeable future.
China Hydraulic Floor Spring Factories – 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 Hydraulic Floor Spring Factories –  D-7300 Single Engine Cylinder Floor Spring – Dorrenhaus detail pictures

China Hydraulic Floor Spring Factories –  D-7300 Single Engine Cylinder Floor Spring – Dorrenhaus detail pictures

China Hydraulic Floor Spring Factories –  D-7300 Single Engine Cylinder Floor Spring – Dorrenhaus detail pictures

China Hydraulic Floor Spring Factories –  D-7300 Single Engine Cylinder Floor Spring – Dorrenhaus detail pictures

China Hydraulic Floor Spring Factories –  D-7300 Single Engine Cylinder Floor Spring – Dorrenhaus detail pictures


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Our enterprise since its inception, constantly regards product good quality as organization life, constantly improve production technology, strengthen merchandise high quality and continuously strengthen enterprise total good quality administration, in strict accordance with all the national standard ISO 9001:2000 for China Hydraulic Floor Spring Factories – D-7300 Single Engine Cylinder Floor Spring – Dorrenhaus , The product will supply to all over the world, such as: Cape Town, Israel, Angola, With high quality, reasonable price, on-time delivery and customized & personalized services to help customers achieve their goals successfully, our company has got praise in both domestic and foreign markets. Buyers are welcome to contact us.
  • We are really happy to find such a manufacturer that ensuring product quality at the same time the price is very cheap.
    5 Stars By Penny from Saudi Arabia - 2017.12.19 11:10
    The manufacturer gave us a big discount under the premise of ensuring the quality of products, thank you very much, we will select this company again.
    5 Stars By Sophia from Madrid - 2017.11.12 12:31
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