Working Principle and Installation Precautions of Manual Balancing Valve

Ⅰ. Working principle of manual balancing valve

The balance valve is a valve that exists to adjust the flow and pressure of the medium at both ends of the valve body. It is a special valve device whose particularity is mainly due to the particularity of the system in which it acts. The manual balancing valve is manually adjusted at one time and cannot automatically change the resistance coefficient with the change of the system operating conditions, so it is called a static balance valve.

The object of the manual balancing valve is resistance, which can play the role of a manually adjustable orifice plate to balance the resistance of the pipe network system and achieve the role of resistance balance of each loop.

It can solve the problem of steady state imbalance of the system: when the operating conditions are different from the design conditions, the circulating water volume is more or less than the design conditions. Since the balance valve balances the system resistance. The new water volume can be distributed in a balanced manner according to the proportion calculated by the design, so that the flow of each branch will increase or decrease proportionally at the same time, and still meet the corresponding flow requirements under the current load.

Ⅱ. There are also some precautions for the installation of manual balancing valve:

1. It can be installed on the return water pipeline or on the water supply pipeline.

2. It is recommended to install the manual balancing valve on the return water pipeline with low water temperature.

3. It can be installed horizontally or vertically.

4. The installation position of the manual balancing valve needs to set a straight pipe section according to the equipment requirements, usually 6 times the pipe diameter.

The balance valve is divided into manual balancing valve and self-operated balance valve. No matter the manual balancing valve or the self-operated balance valve, their function is to increase the resistance at the proximal end of the heating system and limit the actual operating flow to not exceed the design flow; in other words, its function is to overcome the excess resources at the proximal end of the heating system. Use the pressure head to make the electric regulating valve or temperature control valve work under a permitted capital pressure head.

Therefore, manual balancing valves and self-acting balancing valves are auxiliary flow adjustment devices for temperature control valves or electric control valves, but they are very important. If the selection is improper, or the design is unreasonable, neither the electric regulating valve nor the temperature control valve can work well.

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