... Haudraulic Door Closer 1. Manual open, automatic close, 2. No motor, no drive device, energy saving 3. For double leaf Haudraulic Door ... saving. No motor, no drive device, users can open thedoor with hand and the door will close automaticallyClosing force and speed can be ... and separated door of home, Hospital, Hotels,offices etc. No special maintenance are required.2 leaf, bi-parting Haudraulic Door ...