D375 Floor spring

Floor spring floor hinge ground spring door spring door hinge glass door hardware1. General design, suitable for left or right hand to open the door in single and both sides.2. Two sections closing door value,can adjust the closing door speed between 90degree 25degreeand 25degree 0degree separately3. 90 degree auto-orientation, max opening at 116 degree,non-hold on machine avaiable if requested4. inside pressure reducing valve to prevent the destruction of the floor spring or oil leakage on occasion that the door is closed by strong pressure or wind force.5. Use low temperature frostbite hydraulic oil,ensuring the normal door-closing speed when the temperature is forty degree below zero.6. can be adjusted left or right ,forward or backward,up or down,easy to install and adapt to individual requestments7. passed test of over 500.000 cycles8. we can mark laser logo on the machine body.