¡ñ  Inside pressure reducing value:using to prevent the destruction of the floor spring of oil leakage on occasions that the door is closed by strong pressure or wind force.
¡ñ  General design,suitable for left or right hand to open the door in single and both sides.
¡ñ  Use low temperature frostbite hydraulic oil,ensuring the normal door-closing speed when the temperature is forty degree below zero degree.
¡ñ  For cement container,5mm adjustable in length and width,and 2 degree vertically adjustable when the calibration position is zero.

¡ñ  Adopting double-spring design,opening lightly and closing smoothly,prolonging service life.
¡ñ  Inside pressure reducing value:using to prevent the destruction of the floor spring of oil leakage on occasions that the door is closed by strong pressure or wind force.
¡ñ  General design,suitable for left or right hand to open the door in single and both sides.
¡ñ  Use low temperature frostbite hydraulic oil,ensuring the normal door-closing speed when the temperature is forty degree below zero degree.
¡ñ  Cement container,height,width and length can be adjustable which is convenient for assembling.