EDRV dynamic balance electric regulating valve

I. Introduction:
The EDRV dynamic balance electric regulating valve is a combination of a dynamic differential pressure balance valve and an electric regulating valve. It is equivalent to installing a constant pressure device at the inlet and outlet ends of an electric regulating valve. When the system pressure changes, it keeps the electric regulating valve in a constant pressure state, ensuring that the valve opening will not be adjusted due to flow changes caused by system pressure fluctuations, thereby enhancing the hydraulic stability of the system. When the inlet pressure increases, the valve automatically reduces its passage diameter to decrease flow; and vice versa. If the valve is installed in reverse, this regulating system will not function. Moreover, the valve disc that performs the regulating function is directional; reverse pressure can even reduce or completely block the flow. Since the balance valve is installed for better heating, there is no issue of reverse installation. If it is installed in reverse, it is a human error that will be corrected. The balance valve belongs to the category of regulating valves. Its working principle is to adjust the flow rate by changing the gap (i.e., opening) between the valve core and the valve seat, thereby altering the flow resistance of the fluid passing through the valve.

II. Working Principle:
The EDRV dynamic balance electric regulating valve is an integrated product of dynamic balance and electric regulation. It adopts a brand-new design concept, enabling the regulating valve to balance pressure changes in the dynamic system when pressure fluctuates during actual system operation. Therefore, the flow characteristic curve of this dynamic balance electric regulating valve during operation is consistent with the ideal flow characteristic curve, with no deviation. The special design ensures that the regulation of the electric balance valve is only affected by the standard control signal, not by system pressure fluctuations. Furthermore, the flow rate is constant at any opening position of the electric valve. For HVAC systems, this means that the heat (or cold) energy delivered by the electric valve at any position is stable. Thus, this dynamic electric balance valve is particularly suitable for variable flow systems with large system load changes. It has the characteristics of strong anti-interference ability, stable working state, and high regulation accuracy, avoiding the disadvantage of traditional electric regulating valves whose flow rate changes with system pressure fluctuations even at the same opening position. The dynamic electric balance valve maintains a constant flow rate. When a change is required, the opening is adjusted to set a new flow rate, and then the balance valve maintains this new flow rate, so it is not affected by external factors, keeps the flow rate of the unit stable, and makes system regulation more reliable.

III. Installation and Commissioning:
1. Slide the driver bracket onto the valve body connection head, then tighten the driver fixing screws.
2. First, slide the connecting nut onto the valve stem, connect the power supply and rotate the driver until the driver's lifting nut descends to match the valve stem, then cut off the power. Next, place the semicircular snap ring into the valve stem groove, lift the connecting nut and screw it into the adjustable thread. After adjusting the position, tighten the fastening nut with a wrench.
3. When installing the dynamic balance electric regulating valve, vertical installation should be prioritized, and sufficient space should be reserved for maintenance and removal of the driver.
4. Power on to close the valve, then align and attach the scale with the scale indicator.

III. Parts and Materials:

IV. Technical Parameters:

V. External Dimensions: