Flow control valve for heating circulation system, has valve head whose surface moving against reset force is larger than surface of another valve head moving towards reset force for pressure-dependant movement of sealing device

摘要

The valve has valve heads (7, 8), which are provided in a flow direction, which is viewed behind valve seats (9, 10) for overcoming reset force. Distance between the valve heads is larger than distance between the valve seats. A surface (13) of the valve head (7) moving against the reset force is larger than a surface (19) of the valve head (9) moving towards the reset force for pressure-dependant movement of the sealing device.