Pneumatic globe valve is a forced sealing valve. The sealing surfaces of the valve disc and valve seat are made of iron-based alloy surfacing or Stellite cobalt-based hard alloy surfacing, which has the characteristics of good wear resistance, high temperature resistance, corrosion resistance, scratch resistance and long service life. When the pneumatic valve is closed, pressure must be applied to the valve disc to force the sealing surface to prevent leakage.