Parker Autoclave Medium Pressure Valves features include the largest-port valve available for medium pressure applications and a rising stem/barstock body design. Tubing size 1-1/2″. A non-rotating stem prevents stem/seat galling. The new one piece stem design permits ease of assembly and packing replacement. Metal-to-metal seating achieves bubble-tight shut-off, longer stem/seat life in abrasive flow, greater durability for repeated on/off cycles and excellent corrosion resistance. PTFE encapsulated packing provides dependable stem and body sealing. Stem sleeve and packing gland materials have been selected to achieve extended thread cycle life and reduced handle torque. There is a choice of Vee or Regulating stem tip. Available in two body patterns.