Wei Tai Wei technology (Shanghai) Co. , Ltd. is an inventor and leading manufacturer of superior flow control products. Our products are  designed-tested and certified by the leading testing agencies, including the Underwriters  Laboratories (UL), Factory Mutual (FM), Water Regulations Approval Scheme (WRAS), National  Sanitation Foundation (NSF) and etc, based on a wide range of global standards. Founded in 1985 by Sir Michael J.Graham in California, USA, we have dedicated ourselves to the  production of critical flow control products, serving the critical Fire Protection, Heating,  Ventilation & Air Conditioning (HVAC), General Process Industries, Water Supply & Water Treatment  markets worldwide. We operate from our main facilities utilising the latest manufacturing technologies and equipment  available to produce world class flow control products. We strive to continue to provide the highest  quality products to discerning customers at all times.