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Counterbalance valve is a special function of the valve, it has good flow characteristics, the valve opening instructions, opening locking device and for the flow measurement of small pressure valve. The use of special intelligent instruments, enter the valve model and the opening value, according to the measured pressure signal can be displayed directly through the balance valve flow value, as long as each branch and user access to install the appropriate specifications of the balance valve, And with a dedicated intelligent instrument one-time debugging, you can make the user's flow to set value. Balance valve is under hydraulic conditions, play a dynamic, static balance adjustment valve. Such as: static balance valve, dynamic balance valve. Static balance valve, also known as balance valve, manual balancing valve, digital lock balance valve, two-position control valve, which is by changing the valve core and seat gap (opening), to change the flow resistance through the valve to achieve regulation The purpose of traffic, the role of the object is the system resistance, the new amount of water can be balanced according to the proportion of design and distribution, each branch at the same time proportional increase or decrease, still meet the needs of the current part of the load demand climate needs, play The role of heat balance. Dynamic balance valve is divided into dynamic flow balance valve, dynamic pressure balance valve, self-pressure control valve, etc. Balance valve is the scope of the control valve, and its working principle is to change the valve seat and valve seat clearance ), To change the fluid flow resistance through the valve to achieve the purpose of regulating the flow. Counterbalance valve is equivalent to a local resistance can change the throttle element, for incompressible fluid, the flow equation available. Compared with other valves, the balance valve has the following main features: (1) linear flow characteristics, that is, the pressure in the valve before and after the same circumstances, the flow and opening generally linear relationship; (2) a precise opening Instructions; (3) a degree of opening locking device, non-managers can not easily change the opening; table connection, can be easily displayed before and after the valve pressure and flow through the valve. Although balancing valve has many advantages, but its application in air conditioning water system there are still many problems. If these problems are not solved well, the characteristics of the balance valve can not be fully revealed. The role of the balance valve is to regulate the system, each distribution point (such as each floor) of the scheduled flow. Equalizing valves are installed at the entrance of each building to allow the total flow of the heating system to be properly distributed. Balance valve principle is the body of the anti-regulation, when the pressure increases at the entrance, automatically reduce the diameter, reducing the flow changes, and vice versa. If the reverse, this set of adjustment system does not work. And the regulating valve, is directional, the reverse pressure can even reduce or even close the flow. Since the counterbalance valve is installed for better heating, there is no problem with mounting. If it is anti-installed, it is human error, of course, will be corrected. Balance valve is the scope of the control valve, it works by changing the valve core and seat gap (ie, opening), change the fluid flow resistance through the valve to achieve the purpose of regulating the flow. Counterbalance valve is equivalent to a local resistance can change the throttle element, for incompressible fluid, the flow equation available. Kv is the valve coefficient of the balance valve. It is defined as: when the differential valve before and after the differential pressure of 1bar (about 1kgf / cm2), flow through the balance valve flow value (m3 / h). The valve coefficient when the balance valve is fully open is equivalent to the normal valve circulation capacity. If the balance valve opening unchanged, the valve coefficient Kv unchanged, that is to say the valve coefficient Kv from the opening. Obtained by measuring the valve coefficient at different opening degrees, the balance valve can be used as a quantitative adjustment of the flow of throttle components. In the network balance debugging, with the hose will be debugged counterbalance valve small pressure valve and dedicated smart meter connection, the meter can display the value of the flow through the valve (and pressure drop value), and instrumentation man-machine dialogue , Input the flow rate value required by the balance valve to the meter, the meter calculates the opening value of the valve when the pipeline system reaches the hydraulic balance through calculation and analysis. Balance valve is the scope of the control valve, and its working principle is to change the gap between the valve core and valve seat to change the fluid flow resistance through the valve to achieve the purpose of regulating the flow. 1. Should not be free to change the balance valve opening Pipe network system installation is complete, and have the test conditions, the use of special intelligent instrumentation to adjust the balance of all valves set, and the valve opening of the lock, the network to achieve balance of hydraulic conditions . In the normal operation of the pipe network system, should not be free to change the balance valve opening, in particular, should not change the opening degree of locking device. 2. Do not have to install stop valve. In the repair of a loop, the balance valve on the loop can be closed, this time counterbalance valve to stop the flow of water cut off the role of the valve, after the repair and then back to the original locked position. Therefore, the installation of the balance valve, you no longer have to install the globe valve. 3. System to add (or cancel) the loop should be re-commissioning Set in the pipe network system to add (or cancel) the loop, in addition to (or close) the corresponding balance valve should be increased, in principle, all the new balance Valves and the balance valve in the original system loop should be re-commissioning (the original balance valve in the branch loop does not need to be re-adjusted). In the air-conditioning and heating systems, the hydraulic balance of the water circulation system as a transmission and distribution energy is very important. A balanced hydraulic system is to meet the needs of users, saving energy consumption based on the operation. In the air conditioning and heating systems, cold (heat) media from the closed pipe system to the user. For a well-designed pipe network system, each user should be able to obtain the design water volume when the opening of the end control valve (electric control valve, temperature control valve, etc.) is 100%, and each user changes the opening degree of the end control valve When both the required traffic and non-interference. Such a water system is a hydraulic balance system, otherwise it is a hydraulic imbalance system, hydraulic imbalance, also known as hydraulic imbalance. This hydraulic imbalance is random and dynamic. This imbalance static balance valve can not be solved, can only be used to solve the dynamic balance valve.