Wenzhou Baiyilun Hardware Co., Ltd specializes in the development and manufacture of heating and temperature control products. Baiyilun constant temperature control valves, used in pressure temperature regulator of city heating and hot water system, are equipped with body as automatic constant temperature control valve. This valve doesnâ??t need exterior energy while automatically controlled by indoor temperature, which can not only save energy but also protect environment and give you a suitable indoor temperature. Manufacture and test of Baiyilun constant temperature control valve of radiator is according to GB/T13927-92ï¼?EN215-1 standard and through the test of Beijing Construction Project Quality Testing Centre. Our company also has advanced and complete testing and inspecting instrument. Tenet: quality first, credit foremost, warmly serve for customers Determination: honest is root, develop by technology, strive to exploit, and advance with times