Zhejiang Yuyao Keyiduowei Automatic Control Facility Factory is a high technical enterprise which engaged in R&D, production and sales energy conservation product which used for warmly air-condition. For many years ,our factory has devoted to the central air-condition system energy conservation and researching the automatic control system intellectualization.At present , factory has already formed each kind of central air-condition LTD intelligent warm telecontrol ,the mechanical bellowsed warm telecontrol as well as more than ten kinds of ordinary three velocity switches.the nonstop motorized valve etc.In addition,we are good at casting and development of casting .Through many years?accumulation,the enterprise has formed a large of R&D ability and productivity on casting mold aspect,and has passed Authentication of ISO9000 Qulity System,which guaranteed high quality.