Sanitary Valve emerged alongside the advent of fluid pipelines. Humans have been using valves for nearly 4,000 years. Ancient China used wooden stopcock valves in bamboo pipes to produce salt from brine drawn from salt wells. In 1800 BC, ancient Egyptians used similar wooden stopcocks to control water flow when constructing large-scale water conservancy projects to prevent the Nile River from flooding. These were the prototypes of valves. The widespread use of industrial valves began after Watt invented the steam engine. In the early 20th century, valves made of various materials, including cast iron, cast steel, forged steel, stainless steel, chrome-molybdenum steel, and brass, appeared. They are used in various industries and under various operating conditions. Few companies in China initially introduced foreign valve production technology. Later, this introduction led to breakthroughs in domestic valve production, improved quality, and extended service life.