... door, Door weight reaches 35-65kg. Door Closer: 1. Applied to maximum width 800-1100mm single direction open door, Door weight reaches 35-60kg. Two ... speed adjustment,2. Two hydraulic pressure valves independently control two door closing speed ... °)7 Meet the China State QB/T2697-2005 standard,two years use is guarded. ( function(){ var aBigImageSrc ...