Dynamic balance valve product design selection
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Dynamic Balance Valve Product Design Selection
1. In most piping systems, it is recommended to install dynamic balancing valves at branch points, such as the hot water inlet and indoor risers. This helps improve the overall regulation performance of the system and ensures even distribution of flow.
2. When selecting a dynamic balancing valve, refer to the main external dimensions and performance parameter table, along with the selection drawing provided by the manufacturer. The design flow rate should be chosen within the shaded area of the graph to ensure optimal performance.
3. These valves can be installed on either the supply or return pipe. However, if the system's working pressure exceeds the allowable pressure for radiators, a safety balancing valve should be installed on the supply line to prevent damage and ensure safe operation.
4. The maximum operating temperature is 100°C, and the nominal pressure rating is 1.6 MPa. This makes them suitable for a wide range of heating applications.
5. The applicable pressure difference range is between 20 kPa and 300 kPa. If the pressure difference in the system exceeds 300 kPa, noise may occur. To avoid this, additional measures such as pressure-reducing devices should be implemented to manage excess pressure.
6. It’s important to note that dynamic balancing valves do not have a shut-off function. Therefore, a separate shut-off valve should be installed where needed for maintenance or system isolation.
7. The recommended valve sizes are DN15 to DN25. Be sure to specify the connection type, such as threaded or flanged, depending on the system requirements.
The dynamic balancing valve consists of two key components: an automatic adjustment flap and a manual adjustment flap. The system fluid pressure at the silent check valve is referred to as P1. The pressures before and after the manual adjustment valve are P2 and P3, respectively. When the manual flap is set to a specific position, a "set flow rate" is defined, which corresponds to a fixed P2-P3 value. If the system flow increases, the actual P2-P3 value will exceed the set limit. At this point, the automatic flap will close automatically to maintain the desired flow rate. Conversely, if the flow decreases, the flap will open to restore the set flow.
This mechanism ensures consistent flow control regardless of fluctuations in system pressure, making dynamic balancing valves an essential component in efficient and stable heating systems.
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