Zhejiang Dun'an Artificial Environment Co., Ltd manufactures, sells, and distributes various equipment, components, intelligent products in China and internationally. The company offers refrigeration fittings, such as electronic expansion valves, MEMS think service valves, thermal expansion valves, four-way valves, large capacity four-way valves, electromagnetic valves, shut-off valves, ball valves, compressor accumulators, gas-liquid separators, reservoirs, oil separators, check valves, short pipe throttle valves, and filter driers; and thermal and industrial controls comprising heat exchangers and controllers. It also provides commercial air conditioner, special air conditioner, nuclear power HVAC systems, fan dampers, and cold chain systems, as well as water treatment and energy saving services; and intelligent manufacturing equipment, including MEMS pressure sensors, ceramic pressure sensors, and human-machine collaborative robots, as well as fluid control valves, electronic water pumps, and intelligent electric control products. The company was founded in 1987 and is headquartered in Hangzhou, China.