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

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"Sincerity, Innovation, Rigorousness, and Efficiency" is the persistent conception of our firm for the long-term to create jointly with consumers for mutual reciprocity and mutual reward for Device To Keep Door Closed, Push Door Bar, Automatic Exterior Door Opener, We are anticipating to cooperate with you around the basis of mutual added benefits and common development. We are going to never disappoint you.
China 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


Product detail pictures:

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

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

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

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

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


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Our mission will be to become an innovative supplier of high-tech digital and communication devices by furnishing benefit added structure, world-class manufacturing, and service capabilities for China Floor Spring Factories – D-7300 Single Engine Cylinder Floor Spring – Dorrenhaus , The product will supply to all over the world, such as: Swedish, Ecuador, Nepal, At Present, our products have been exported to more than sixty countries and different regions, such as Southeast Asia, America, Africa, Eastern Europe, Russia, Canada etc. We sincerely hope to establish wide contact with all potential customers both in China and the rest part of the world.
  • This company conforms to the market requirement and joins in the market competition by its high quality product, this is an enterprise that have Chinese spirit.
    5 Stars By Monica from Detroit - 2017.12.19 11:10
    The sales person is professional and responsible, warm and polite, we had a pleasant conversation and no language barriers on communication.
    5 Stars By Martina from Hungary - 2018.09.23 18:44
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