Hydraulic Door Closer.

- silent mode on off - automatic hydraulic cushioning door closers - latching speed control/dual valve closing - precise sealed,preventing oil leakage -this door closer is suitable for installing in stainless steel security door - the installation modes of vertical,parallel and slide-rail type all can be chosen at will. - the door closer can be chosen to stop or unstop at will. - continuous adjustment of closing and latching speed:the fast speed can be adjusted to within 3s from 90 degree,slowness close can reach to 60s or more.