Adopting double-spring design, opening lightly and closing smoothly, rolonging service life.
Inside pressure reducing value: Using to prevent the destruction of the floor spring or oil leakage on occasions that the door is closed by strong pressure or wind force.
General design, suitable for left or right hand to open the door in single and both sides.
For cement container, 6mm adjustable in length, 5mm in width and 10mm in length, which is convient for assembling

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1. Door Weight: 150kg.
2. Door Width: 1100-1300mm
3. Door height: 2100-2400mm
4. Max. Open Degree: 105degree;
5. Hold Open: 90degree;
6. Features: Center hung, double acting with 90degree; Stop-device, 2 section
Speed adjustable valve.
Our product has got quality certification from national technique department after 500, 000 cycle tested.