Oako manufactures large selections of low power solenoid operated valves for gas system control applications. These valves are available in 2-way normally open, normally close, and manual reset. Oako valves are available in brass, aluminum, steel and iron with different surface treatments. Features include explosion proof, pipe taps, visual indication, closure proof with leading agency approvals. The pipe connections from 1/2â?? to 8â?? and operation pressure up to 500 PSI. Most valves are rated for â??30oF service for outdoor installation in frigid climates. Oako&＃039;s solenoid operated valves have the lowest switching power requirements. They are the first one in their class with direct CMOS digital interface. Established in 2003 OAKO Technology (Shanghai) Co. Ltd. is an US funded company in Shanghai, with high-tech introduced in design and manufacturing. Oako produces quality products that meets or exceeds industry standards. As a result, The AF05B Series meet the compulsory requirements of national standard â??The regulation of design for town gasâ??. Oako also participated in writing â?? The technical regulations for Gas Alarm Systems in Townâ?? for the national construction ministry. Oako received nearly 20 patents in this series.