The cylindrical body that of overall compound forging welding has the characteristics of good strength, good sealing, defect-free dimension, non-maintenance and long service life of 30 years; Extended stem, york and other valve accessories design enable to operate and control valves easily; The stem is featured by anti flying out structure, which improved the security of the valve operation; Valve seat and stem are adopted fireproofing design. Plastic bag first, then plywood case
