ZHEJIANG DORRENHAUS HARDWARE INDUSTRIAL CO., LTD.

Established in:Oct.2011Main Products:Hydraulic door closer,Floor door closerNumber of Employee:205,in which 7 for R&D,13 for quality controlFloor Space:12500 M2 Now have 5 complete production lines with annual output of 1.2 mils setsPass certification for EN ISO9001:2008 quality management system in 2012Main international and domestic standard or certification which our products passed:1)American National Standard: ANSI 156.4 Grade 1,life cycle test of 2 mil.cycles 2)American UL 10C for 3 hours fire testing 3)European Standard CE:EN1154,life cycle test of 500,000 cycles 4)European Standard CE:EN1634 fire testing China National Standard:QB/T 2698-2005 Grade 1,life cycle test of 1 mil.cycles