German NORVAL valve NORVAL model NORVAL price

With a constant pressure differential across the NORVAL valve, the flow rate of a standard valve changes little when the opening varies over a wide range, but changes sharply at a certain opening, indicating poor regulation performance. A control valve is a valve that 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 control valves and automatic control valves. Manual and automatic control valves come in many types with different regulation performances. Automatic control valves include self-operated flow control valves and self-operated differential pressure control valves. NOR