Gearbox is needed for bolt bonnet globe valve from size 8" above and pressure from class 300 above. Bolt bonnet globe valves are also classified by the body: regular staight pattern, Y pattern and angle pattern. Their various configuration allow them to be installed in a variety of piping configurations, such as nuclear power plant, petrochemical, nature gas etc. Both flange ends and BW ends are avaiable for industrial pipeline connection. The globe valve with straight pattern body design, swivel plug disc or flat and regulating disc, OS&Y, rising stem operated by handwheel, gearbox, electric actuator as well as pneumatic actuator. Valve material can be carbon steel, stainless steel, alloy steel, duplex steel or special steel according the requirements of the working medium, WCB, WC6, WC9,LCB, CF8, CF8M, C5, C12A, 4A, 5A, Aluminium bronze, Monel etc.