1.main body material: wrought iron
2.planque is made of 304 stainless steel
3.calibration is available for the floor spring.
1. Adopting double-spring design, opening lightly and smoothly,prolonging service life.
2. Inside pressure reducing valve to prevent the destrution on occasion that the door closed by strong pressure or wind force
3. General design, suitable for left and right hand to open the door in single and both sides.
4. Use low temperature frostbite hydraulic oil,ensuring the normal door-closing speed when the temperature is forty degree below zero
5. Cement container, height,width and length can be adjustable which is convenient for assembling
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:30.8cm Width:10.8cm Height:4.20cm
The products have passed Chinese national QB/T3884-99 standard