Shenyi Gas Co. was established in 1960, specialized in distributing variety of gas, valves, cylinder engineering, and gas engineering in greater Taipei area. Providing service to major research facilities, enterprises, hospitals and public institutions. Primary Tech Co. was founded in 1994, specialized in gas delivery system hardware for semiconductor, optoelectronic, and packaging manufacturing process. Primary Tech provides UHP gas regulator, valve, filter, pipe and fitting.