Characteristics and working principle of electric dynamic balancing valve
Classification:
Release Time：2021-05-21
Features of electric dynamic balancing valve: it can automatically balance the system flow at the required set value; it can automatically eliminate the hydraulic imbalance caused by various factors in the water system, maintain the flow required by users, overcome the "uneven heating and cooling", and improve the qualified rate of heating and air conditioning at room temperature. It can effectively overcome the bad operation mode of "large flow, small temperature difference", improve system energy efficiency and realize economic operation.
Characteristics of electric dynamic balancing valve
1, can make the system flow automatic balance in the required set value;
2. It can automatically eliminate the hydraulic imbalance caused by various factors in the water system, maintain the flow required by users, overcome the "uneven heating and cooling", and improve the qualified rate of heating and air conditioning at room temperature;
3. It can effectively overcome the bad operation mode of "large flow, small temperature difference", improve system energy efficiency and realize economic operation.
Working principle of electric dynamic balancing valve
By changing the flow area of the valve core of the balance valve to adapt to the changes before and after the valve, so as to achieve the purpose of controlling the flow. Dynamic balancing valve is a local resistance can change the throttle element, for the incompressible fluid to simplify the flow equation is:
N=O(type)
Where: Q-flow through the balance valve;
K -- Flow coefficient of valve opening;
A- Overflow area of spool
△P -- differential pressure of valve inlet and outlet
Since the opening of the valve is unchanged, the change of K value can be ignored, so the flow of the valve should be controlled A(△P) to remain constant. The balance valve is composed of a variable flow area valve bladder and a high precision (± 5%) spring and support device. The spring is automatically controlled by the pressure difference on the flow area of the valve bladder, so that the flow through the valve is constant.
district heating
Dynamic balancing valve is used at the thermal inlet to ensure the required flow of the system.
Indoor heating system, temperature control valve to ensure that each radiator through the required flow, dynamic balancing valve to ensure that the riser flow constant, to solve the level of imbalance.
Air conditioning system
In large-scale centralized air-conditioning system, a balance valve is set at the end of the air-conditioning equipment (air handler and fan coil), and the flow required by the equipment is guaranteed by a three-way (or two-way) electric valve, and the balance valve realizes hydraulic condition adjustment. In the cold and heat sources, cooling towers, water pumps and other places when the design pipeline is limited. Balance valve is used to avoid partial load and ensure the normal operation of the equipment.
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