1. main body material: wrought iron
2.plaque made of 304# stainless steel
3.calibration is available for the location
* Inside pressure reducing valve to prevent the destrution on occasion that the door closed by strong pressure or wind force
*General design, suitable for left and right hand to open the door in single and both sides.
*Use low temperature frostbite hydraulic oil,ensuring the normal door-closing speed when the temperature is forty degree below zero
*Adjustable length in cement container is 6mm,+/-2 degree adjustable in vertical and horizontal direction at the position of 0 degree.
Cement container, height,width and length can be adjustable which is convenient for assembling
Suitable for maximum wide door leaf
The maximum bearing weight
The door closing speed is controlled by the adjusting valve
Length:29cm Width:12.4cm Height:5cm
The products have passed chinese national QB/T3884-99 standard