Flow controller with integrated control valve is primarily designed to control the flow of circulation water in district heating systems. The controller is used together with an electric actuator EPV 3B or EPV 3N/K - BELIMO and can be controlled by the electronic controllers.

The limitation and flow regulation is realized by means of the actuator with a diaphragm and integrated control valve. Control valve cone is controlled by the electric actuator and limited by the adjustable nut. Changing the position of the adjustable nut increases or decreases maximum flow across the valve. The actuator with a diaphragm is connected to the valve entry. Pressure difference acts through the impulse tube on the control diaphragm and flow controller cone. Each pressure change on the valve entry, causes the movement of the control diaphragm and flow controller cone and causes increase or decrease of the valve orifice.