Door closer VZ-7000 SERIES

Fireproof automatic hydraulic Door Closer A door closer is an important part for automatic door, which is frequently applied to closing the door, generally after someone opens it, or after it was automatically opened. We must take into account various of criteria, when we choose a proper closer, such as the closer's performance in fire situations, resistance to opening forces ( for use by disabled or infirm) as well as health, security, durability, risk of vandalism /ligature and aesthetics. The procedure of Fireproof automatic hydraulic Door Closer Shell casting process:Die-casting---Grinding---Milling base drilling mounting holes--- Drilling horizontal holes---Polishing---Drilling long holes---Drilling oil return hole(drilling slant hole)---Drilling speed regulation valve hole---Horizontal boring straight holes(transverse hole, rough straight hole, finishing straight hole)---Horizontal hole chamfering---Deslagging Specification of Fireproof automatic hydraulic Door Closer Model:VZ-7000 series Power Size EN6# Max.Door Width(mm) 1200 Main Body Size(mm) 305*85*82 Max. Door Weight 120kg Application Temperature -30°C-55°C Maximum Open Angle 180° Warranty time 6 years Package box+carton Closing Speed Adjustment Speed 1: 0°-20° Speed 2: 20°-180°