To control the valves, wheel actuators, gearbox actuators, chain flywheel actuators, pneumatic piston actuators and electrical actuators are used.
The valve is opened-closed manually from the wheel on the valve.
Valves in large dimensions can be controlled with little force by gearbox actuators. Also, valves under high pressure can be safely operated with these actuators.
It is a chain-operated mechanism used for Gate, Globe and Angle Globe Valves that are placed above ground level.
It is an actuator mechanism that utilizes air pressure in a piston or pneumatic system.
It is an actuator system that uses electrical devices to locally or remotely open and control the valves.