Balance Valve
Introduction
The balancing valve is a valve with special functions. There is nothing special about the valve itself, only the function and place of use are different. In some industries, due to the large pressure difference or flow difference between the media (all kinds of flowable substances) in various parts of the pipeline or container, in order to reduce or balance the difference, between the corresponding pipelines or containers A valve is installed to adjust the relative balance of pressure on both sides, or to achieve a balance of flow through diversion. This valve is called a balance valve.
Itadopts DC valve body structure,which has better equal performance, the characteristic of partial specific flow can reasonably distribute the flow and effectively solve the problem of heat supply uneven cooling and heating at room temperature in (air conditioning) system at the same time, it can accurately adjust the pressure drop and flow to improve the liquid flow state in the pipe network system, achieve the purpose of liquid balance and energy saving in pipe network.
The valve is provided with opening degree indication, opening locking device and small pressure measuring valve for flow measurement, as long as install balance valves with appropriate specifications at each branch and user inlet, and lock them after one-time commissioning with special intelligent instruments to make them ideal products in the system. The SP45F balance valve can be installed on both the water supply pipe and the return pipe. Generally, we recommend to install it on the return pipe, especially for the high-temperature loop. In order to facilitate commissioning, it should be installed on the water supply pipe. The water supply (return) pipe with balance valve does not need to be equipped with globe valve.
Working principle
The balance valve is a regulating valve with a special function of digital locking. It adopts a DC valve body structure and has better equal percentage flow characteristics. It can reasonably distribute the flow and effectively solve the room temperature problems existing in the heating (air conditioning) system. The problem of uneven heating and cooling. At the same time, it can accurately adjust the pressure drop and flow rate to improve the liquid flow state in the pipe network system, achieve the purpose of liquid balance in the pipe network and save energy. The valve is equipped with an opening indication, an opening locking device and a small pressure measuring valve for flow measurement. As long as a balance valve of appropriate specifications is installed in each branch and user entrance, and a special intelligent instrument is used for one-time debugging and locking, the valve will The total water volume of the system is controlled within a reasonable range, thereby overcoming the unreasonable phenomenon of "large flow, small temperature difference". The balance valve can be installed on either the water supply pipe or the return water pipe. It is generally installed on the return water pipe, especially for high-temperature loops. In order to facilitate debugging, it should be installed on the return water pipe. The supply pipe with a balance valve installed There is no need to install a stop valve in the (return) water pipe. Install a balance valve in the pipeline system, and adjust it to change the system pipeline characteristic resistance ratio to achieve consistency with the design requirements. After the system is debugged, there is no static hydraulic imbalance problem. If a qualified debugged system is in partial load operation, when the total flow rate decreases, each branch pipe regulated by the balance valve will automatically reduce the flow rate year-on-year, but the flow ratio set for each branch pipe will remain unchanged.
Performance features
1. Ideal adjustment performance;
2. Excellent cut-off function;
3. Open status display accurate to 1/10th of a circle;
4. The theoretical flow characteristic curve is an equal percentage characteristic curve;
5. National patented opening and closing locking device;
6. There is a certain flow coefficient corresponding to each full circle. During debugging, as long as the pressure difference between both ends of the valve is measured, the flow rate flowing through the valve can be easily calculated;
7. PTFE and silicone sealing, reliable sealing performance;
8. Internal components are made of YICr18Ni9 or copper alloy, which has strong corrosion resistance and long service life;
9. The valve stem can be lifted and lowered internally, so there is no need to reserve operating space.
10. It is a combination valve.
Main features
(1) Linear flow characteristics means that when the pressure difference between the front and rear of the valve remains unchanged, the flow rate and the opening are generally linearly related; (2) There is an accurate opening indication (3) There is an opening locking device and non-managers cannot do it casually Change the opening; the meter connection can easily display the pressure difference before and after the valve and the flow rate flowing through the valve. Although the balancing valve has many advantages, there are still many problems in its application in air conditioning water systems. If these problems are not solved well, the characteristics of the balancing valve will not be fully displayed. The function of the balance valve is to adjust the predetermined flow rate at each distribution point (such as each balcony) in the system. A balancing valve is installed at the entrance of each building to reasonably distribute the total flow of the heating system.
Advantages
Convenient to use: The construction of the project is relatively flexible. The installation of the project in stages or the use of the equipment in stages will not affect the balance of the water system; Convenient to change: When the water system in some areas needs to be redesigned, it will not affect the design and balance of the water system in other areas. ; Reduce power consumption: Because the entire water system is balanced, it ensures that the refrigeration unit (boiler, heat exchanger) and water pump operate in the best working condition, which has obvious energy-saving effects; Reduce wear and waste: because the water flow is guaranteed to be constant It will exceed the original design, ensure the durability of all equipment, and avoid the loss of copper pipes caused by excessive flow; improve safety: since the flow balance of the water system is automatically performed, the possibility of artificial destructive adjustment is eliminated. For designers: reduced workload, more flexibility and reduced workload: no need to carry out tedious resistance calculations for the entire pipeline, speeding up the design; can boldly use the off-program system: saving pipes, corresponding materials and installation costs, and The work of balancing the hydraulic system is left to the dynamic flow balancing valve; many other troubles caused by unbalanced water systems can be avoided.
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