With the continuous improvement of people's current living standard and energy-saving understanding, the regulating valve variable flow system plays an increasingly important role in hvac engineering, a new type of hydraulic system —— fully balanced hydraulic system has been used more and more widely in hvac engineering. A fully balanced hydraulic system, which regulates the temperature of the target area by Dynamic equilibrium the flow of the closing equipment (e. g. , the air conditioning box) , dynamically balances the pressure changes in the system, so that the flow regulation between two or more end equipment does not disturb each other, so this system has high efficiency and energy saving. Currently in some air conditioning projects, some planners in order to complete the same function, in the planning to choose the dynamic flow balance valve and electric conditioning valve combination system to replace the Dynamic equilibrium electric conditioning valve, and claimed that the two pieces of equipment had the same function. The dynamic flow balancing valve and the electric conditioning valve combination can replace the Dynamic equilibrium electric conditioning valve, the following is the functional characteristics of these two equipment to carry out some analysis and comparison. Scope of application urban construction, chemical industry, metallurgy, petroleum, pharmaceutical, food, beverage, environmental protection Dynamic equilibrium electric conditioning valve I, Dynamic equilibrium electric conditioning valve function analysis: Dynamic equilibrium electric conditioning valve is different from the traditional electric conditioning valve of a new generation of goods, dynamic equilibrium is an integrated product with electric conditioning, which has the following features: 1 has excellent electric conditioning function: maintenance method (1) remove electric conditioning valve for cleaning, the welding slag, rust and slag in the pipeline block or jam in the ECONOMIZER, guide part and Balance Hole of the lower valve cover, resulting in pulling and scratching on the surface of the valve core and guide surface, and creasing on the sealing surface. This appearance, which often occurs during start-up times and in the pre-commissioning period after major repairs, is the most common problem. In this case, it is necessary to open the valve for cleaning, remove slag, such as sealing surface damage should also be ground, together with the bottom cover open to flush off the balance hole into the bottom of the slag, and the pipeline flushing. Let the conditioning valve open before putting into operation, the media activity for a period of time before returning to normal operation. (2) installation of pipeline filter, small caliber electric regulating valve, especially small flow electric regulating valve, its space saving is very small, medium can not have a little residue. In case of obstruction, it is best to install a filter in the pipeline in front of the valve to ensure the smooth passage of the media. (3) when the external gas or steam is scoured and the General Electric regulating valve is selected, some easily deposited and solid-particle-rich media often become blocked at the saving port and the guiding place, and the bottom plug of the lower valve cover can be turned over, external flushing gas or steam line. When the block or stuck, open the external gas or steam valve, you can not move the condition of conditioning valve to complete the washing operation, so that the valve normal operation. (4) to use other ways of electric conditioning valve, such as direct single, two-seat electric conditioning valve into v-type electric conditioning valve. Single-seat and double-seat conditioning valve saving area is circular spread, the gap is small, easy to jam, v-type electric conditioning valve because there is no gap between the SPOOL and the seat reversal, sediment is not easy to deposit, the special v-shaped opening of v-type electric regulating valve has shear function, which is especially suitable for the application of fiber fluid or suspension containing fine solid and solid medium.