Static balance valve is a commonly used old hydraulic balance products, it is suitable for heat-based variable flow system. Adjusting the flow of the mutual coupling between users, the real heat of the huge users to adjust the balance is difficult to achieve. Static balance valve operation is complex, the adjustment needs to be equipped with smart meters, even if there is a professional technician user traffic coupling phenomenon is also difficult for users to reach equilibrium. The use of valve KV value and valve curve to determine the valve opening method is not suitable for fine management needs. Therefore, the static balance valve, although suitable for the heat source as an active variable flow system is only suitable for small area heating system or building automation system. This article Keywords: valve
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