Germany rff-france valves rff-france models rff-france prices

rff-france valves: When the pressure differential across the valve is constant, the flow rate of a standard valve changes little as the opening varies over a wide range. However, at a certain opening, the flow rate changes sharply, indicating poor regulation performance. A control valve adjusts the valve core stroke according to the direction and magnitude of the signal to change the valve's resistance coefficient, thereby achieving flow regulation. Control valves are divided into manual and automatic types. Both manual and automatic control valves come in various types with different regulation performances. Automatic control valves include self-acting flow control valves and self-acting differential pressure control valves.