Shanghai Thermostat Factory Co.,Ltd. is a professional manufacturer of refrigeration and air conditioning auto-control unit.We have 58 years history in this industry. In 1985,STF cooperated with ALCO to produce T series expansion valve.We were the only Chinese company having the mixed infusing technology in expansion valve production. In 1993, Shanghai Johnson Controller Co., Ltd was established by us and U.S .Johnson to produce YK series controllers. In 1996, FDF-M series diaphragm solenoid valve was certificated as National Grade New Product. Our main products include solenoid valve, thermostatic expansion valve, sight glasses, filter dryer, pressure controller, pressure difference controller ,temperature controller. We have gained approval for our quality control system,in relation to international standard ISO9001:2000 and CE approval can be supplied to order. Products are widely used by Carrier, YORK, Dunhambush, McQuay, Mammoth, HANBELL, RefComp, Midea, etc.