Green Valley Tongtai (Beijing) Environmental Protection Technology Co., Ltd.-Main Products: Reverse osmosis equipment, EDI ultra-pure water systems, direct drinking water equipment, variable-frequency & constant-pressure water supply systems, towerless water supply systems, boiler water softening equipment, chemical dosing devices, UV disinfection equipment, multi-media filters, stainless steel water tanks, integrated sewage treatment equipment, reclaimed water reuse & circulating water treatment equipment, well water treatment equipment. Services: Environmental facilities operation & maintenance, technical transformation of water treatment processes.