high quality double speed door floor spring (DBA-80)

door floor spring 1 suitable for 300kgs door weight door width is 1500*3300mm 2 one spring inside with two speed

high quality double speed door closer/floor spring (DBA-80)

Advances:

1. Floor spring  make the biggest openning angel at 175degree,with  90° auto-orientation fitting.

2.  Constant temperature set assure steady speed of closing under big defference in temperature.

3. With the built-in pressure reducing valve, it not only can adjust the door opening angle, but also prevent oil leaking.

4. With the high quality alluminium coating for further prevention.

 

5. With brass oil core, it can work normally while the temperature 30°below zero even without the antifreeze solution.

 

 

6. Passed 500,000 opening-closing times' test.

7.  suitable for 300kgs door weight, door width is 1500*3300mm

 

Product images:

 

 

 

 

Feature	Image	Describetion
Pivot		Our pivot is made of  Iron 40CR, which is better than general iron in toughness and abrasive  resistance. Some of other  floor spring manufacturers  use general iron instead.
Adjust speed screws		it is made of brass ,has two s eals,which can reduce  the phenomenon of leaking.
ball and roller bearing		Each of the floor spring is equipped with two ORING to make sure  bearing and service life of the floor spring.
The test		Each of the floor spring has been  tested before packing

 floor spring-- The advanced machine of numerical control mills

high quality double speed door floor spring (DBA-80)