Dynamic balance valve product design selection
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Dynamic Balancing 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 enhance the system's regulation performance and ensures even distribution of flow throughout the network.
2. When selecting a dynamic balancing valve, refer to the main external dimensions and performance parameter table, along with the valve selection drawing provided by the manufacturer. The design flow rate should be chosen within the shaded area on the graph for optimal performance.
3. These valves can be installed either on the supply or return line. However, if the system fluid pressure exceeds the allowable pressure rating of the radiators, it is advisable to install a safety balancing valve on the supply line to prevent potential damage or failure.
4. The maximum operating temperature for the valve is 100°C, and the nominal pressure rating is 1.6 MPa, making it suitable for most standard heating and cooling applications.
5. The applicable pressure difference range is between 20 kPa and 300 kPa. If the system pressure difference exceeds 300 kPa, steps should be taken to reduce the excess pressure in order to avoid noise and maintain system stability.
6. It’s important to note that dynamic balancing valves do not have a shut-off function. Therefore, it is recommended to install a separate shut-off valve where necessary for maintenance or system isolation.
7. For most applications, valves with nominal diameters ranging from DN15 to DN25 are typically used. Be sure to specify the connection type (e.g., threaded, flanged, or welded) during installation.
The dynamic balancing valve consists of two key components: an automatic adjustment flap and a manual adjustment flap. The system fluid pressure before the silent check valve is denoted as P1, while the pressures before and after the manual adjustment valve are P2 and P3, respectively. When the manual flap is set to a specific position, it defines a "set flow rate," which corresponds to a fixed P2-P3 value. If the system flow increases, causing P2-P3 to exceed the set limit, the automatic flap will close automatically to maintain the desired flow. This process reverses when the flow decreases, ensuring consistent performance.
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