A modulating control valve is an automated valve that is used to control the amount of flow in a system or process. They go beyond simple shutoff or isolation (on/off) and actually allow precise control of the flow rate. The actuators on these valves use feedback and control signals to accurately open and close the valve.

A control signal is sent to the actuator to instruct it on how far to turn the valve stem. The control signal may be in the form of electrical voltage or electrical current.  A 0-10 VDC electric signal will cause the actuator to completely closed the valve at 0 VDC, and completely open it at 10 VDC. Likewise a 4 to 20mA electrical signal will cause the actuator to completely close the valve at 4mA and completely open the valve at 20mA

.

15mm Motorised Ball Valve – SS304 3 way

Size: DN15 | Material: SS304 | Voltage: 24V DC | Actuator Type: Modulating Control | Valve Type: 3 Way, L Port

50mm Motorised Butterfly Valve – Modulating

Size: DN50 | Material: CI | Voltage: 24V DC | Actuator Type: Modulating Control 4 to 20mA