1. Adopt Germany manufacturing technology, sealing ring imported from Germany, durable and free from oil leakage.
2. Its service life are 1 million times, implement America ANSI/BHMA156.4 standard.
3. Build in imported high-quality non-flame anti-freezing oil, can be normally used above -40c    
4. B4W series, its installation hole's diameter is188X19mm, can be changed for other brand.  
5. Two choices: non-positioning and positioning, the largest door-opening angle is 180°

Plan diagram of product

Main Parameter
Model Size mm  Applicable door weight Applicable door width Function Please install as required in instruction
A B C D E
B4W 188 204 19 42 72 80_120KG ≤1400cm Two-phase speed governing, without positioning function  
B4D 188 204 19 42 72 80_120KG ≤1400cm Two-phase speed governing, with positioning function  
                   
Model
B4W
Size (mm): length 204, width 42, height 72  
Installation Size (mm) 19*188
Door Weight Range: 80_120KG
Function: Dual-speed governing, positioning and non-positioning, has fire-proof and freeze protection function.
Applicable Range: Heavy steel door, wooden fire-proof door, stainless steel anti-theft door, burglary-proof door.