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high quality double speed floor spring (BL48)

1 Floor spring  Maxinum single-action open angle is 116 degree,with 90 degree auto-orientation fitting.Unorientation can be made according to clients' demand.

2  Whole hydraulic pressure in door,two section speed control of closing door.The regulating position is 90-25 degree and 25-0 degree.

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

4 Built-in reductou can prevent door from damage in case of extreme exterior pressure or strong wind.

5 The perpendicular and the height of the door can be adjustable by 9mm.±4 degree adjustment is possible in zero position aligning.

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