# Inside pressure reducing valve 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.

# Use low temperature frostbite hydraulic oil,ensuring the normal door-closing speed when the temperature is forty degree below zero .

# For cement container, 5mm adjustable in length and width, and 2 degree vertically adjustable when the calibration position is zero.

304# stainless steel cover plate