Balance valve is a special function of the valve, it has a good flow characteristics, valve opening degree indication, opening degree locking device and for flow determination of the pressure measurement valve. The use of special intelligent instrumentation, enter the valve type and opening value, according to the measured differential pressure signal can be directly displayed through the balance valve flow value, as long as the branch circuit and the user’s inlet installed on the appropriate specifications of the balance valve, and special intelligent instrumentation for a one-time debugging, you can make the flow of each user to reach the set value.
Classification of balancing valve
Balance valve is in hydraulic conditions, play a dynamic, static balance adjustment valve.
Static balance valve is also known as balance valve, manual balance valve, digital locking balance valve, two-position adjustment valve, etc., it is by changing the spool and seat gap (opening), to change the flow resistance through the valve to achieve the purpose of adjusting the flow rate, the object of its action is the resistance of the system, the ability to balance the distribution of the new water in accordance with the design of the calculated ratio of the various branches at the same time in proportion to the increase or decrease, and still meet the current climate needs under the flow demand for part of the load, play a role in the heat of the system, and the water supply and distribution of the new balance of the water. Part of the load flow demand, play the role of heat balance.
Dynamic balancing valves are divided into dynamic flow balancing valves, dynamic differential pressure balancing valves, self-operated differential pressure control valves and so on. Balancing valve belongs to the category of regulating valves, its working principle is to change the spool and seat gap (i.e., openness), change the fluid flow through the valve flow resistance, to achieve the purpose of regulating the flow. Counterbalance valve is equivalent to a local resistance can change the throttle element, for incompressible fluids, by the flow equation can be obtained.
Balance valve characteristics
Linear flow characteristics, i.e., in the case of constant differential pressure before and after the valve, the flow rate and the degree of opening roughly linear relationship;
With precise opening indication;
There is an opening degree locking device, non-managers can not casually change the opening degree; table connection, can easily display the valve before and after the differential pressure and flow through the valve. Although the balancing valve has many advantages, but its application in the air-conditioning water system there are still many problems. If these problems are not solved well, the characteristics of the balance valve does not fully emerge. The role of the balancing valve is to regulate the system, each distribution point (such as each building block) of the predetermined flow. By installing a balancing valve at the inlet of each building, the total flow of the heating system can be distributed appropriately.
Principle of the balancing valve
The counter-regulation in the valve body, when the pressure at the inlet increases, automatically reduces the diameter of the passage and reduces the change in flow rate, and vice versa. If the reverse connection, this regulation system does not work. Moreover, the valve piece, which acts as a regulator, is directional, and the reverse pressure can even reduce or even close the flow.
Since the balancing valve is installed for better heating, there is no question of reversing it. If it is installed backwards, it is a human error, which will of course be corrected. Counterbalance valves belong to the category of regulating valves, and its working principle is to change the flow resistance of the fluid flowing through the valve by changing the gap (i.e., opening) between the spool and the valve seat to achieve the purpose of regulating the flow.
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Post time: Jul-20-2024
