1.main body material: wrought iron
2.adjustable in up/down/left/right directions.
3.one spring hydraulic working system
1.. Inside pressure reducing valve to prevent the destrution on occasion that the door closed by strong pressure or wind force
2. General design, suitable for left and right hand to open the door in single and both sides.
3. Use low temperature frostbite hydraulic oil,ensuring the normal door-closing speed when the temperature is forty degree below zero
4. 5mm is adjustable in length and width for floor spring in the cement container, and 2 degree
vertically adjustable at the position of zero.
304# stainless steel cover plate
Suitable for maximum wide door leaf
The maximum bearing weight
The door closing speed is controlled by the adjusting valve
Length:25.7cm Width:10.5cm Height:5.0cm
The products have passed Chinese national QB/T3884-99 standard