Control valve symbols are composed of three parts: the actuator, the valve body, and the accessories. The actuator is the device that provides the force or motion to move the valve stem or disc.

The valves promise a pressure sensitivity of less than 0.5-1% Rd/bar. The manually operated, pressure compensated control valve series is available in four different versions to control flow ...

To make the flow rate of a gas valve insensitive to changes in inlet pressure and to achieve proportional constant flow characteristics, a proportional constant flow valve is proposed, which is ...