Qingdao bestyear hardware & machinary Co., Ltd are professional manufacturer and exporter of all kinds of high, medium & low pressure valves, pipe fittings and rubber expansion joints. Our valves are in accordance with ANSI, API, MSS, JIS, JPI, DIN, BS, NF, AWWA standard, can be extensively used in marine, petroleum, chemical, metallurgical, electric power, architectural installation and industries.