Gear Operator is a tool for help open and close the valve, Gear operator which is also called valve Gearbox, Gear actuator, Worm Gearbox, Bevel Gearbox .

According to the worm is different,so it called worm gearbox or Bevel Gearbox .

And the turns of worm is different, so it called part-turn gearbox (1/4 turns worm gearbox), multi turn gearbox .

part -turn worm gearbox mostly used on  butterfly valve,ball valve, plug valve.

multi-turn gearbox mostly used on gate valve, globe valve.