YOY Valve Group Co., Ltd. was established in 1984. The industrial park covers an area of 90,000 and 1,000 square meters, with a registered capital of 101 million yuan. In 2018, the output of safety valves was 250,000 sets. The company has more than 500 sets of special equipment such as modern intelligent machining centers, CNC machine tools, and ordinary machine tools, as well as oversized vertical lathes with a maximum diameter of 3.5 meters. It has special equipments for physical and chemical tests of metal materials, mechanical properties and mechanical tests, ultrasonic thickness measurement, non-destructive testing, spectral analysis, metal heat treatment, safety valve full performance …