Underground Gas Exhaust Fully Welded Ball Valve is developed by engineers and technicians with more than 30 years of experience in high-pressure valve design and manufacturing, using the latest international technical standards. It is mainly used for long-distance pipeline transportation of oil, natural gas, and coal gas and urban gas pipeline systems. Due to its unique characteristics, its ability to withstand pipeline stress, corrosion resistance, safety, weather resistance, and long-term reliability are fully considered during design; the sealing and structural design are unique to the factory. The operating modes include vertical worm gear drive, pneumatic, electric, gas/concentration linkage, electric/wave linkage, and various special control forms.