static balancing valve

Overview of Static Balance Valve

Static balance valve, also known as balance valve, manual balance valve, digital locking balance valve, dual position regulating valve, etc., changes the flow resistance through the valve by changing the gap (opening) between the valve core and the valve seat to achieve the purpose of regulating the flow rate. Its target is the resistance of the system. Static balance valve can balance the distribution of new water according to the design calculation ratio, and each branch can increase or decrease proportionally at the same time, still meeting the flow demand of partial load under current climate needs, playing a role in thermal balance.

Static balance valve is a regulating valve with special digital locking function. It adopts a DC valve body structure and has good equal percentage flow characteristics, which can reasonably distribute flow and effectively solve the problem of uneven temperature in heating (air conditioning) systems. At the same time, it can accurately adjust pressure drop and flow rate to improve the liquid flow state in the pipeline system, achieve liquid balance in the pipeline system, and save resources. The valve is equipped with an opening indicator, an opening locking device, and a pressure measuring small valve for flow measurement. As long as appropriate balance valves are installed in each branch and user inlet, and intelligent instruments are used for one-time debugging and locking, the total water volume of the system is controlled within a reasonable range, thus overcoming the unreasonable phenomenon of "large flow, small temperature difference". It can be installed on both the water supply pipe and the return pipe. Generally, it needs to be installed on the return pipe, especially for high-temperature circuits. For the convenience of debugging, it needs to be installed on the return pipe. The supply (return) pipe with a balance valve does not need to be equipped with a shut-off valve. Install a static balance valve in the pipeline system and adjust it to change the ratio of characteristic resistance values of the system pipeline to meet the design requirements. After the system debugging is qualified, there is no static hydraulic imbalance problem.
If a system that has passed debugging is in partial load operation, the flow rate of each branch pipeline regulated by the static balance valve will automatically decrease year-on-year when the total flow rate decreases, but the flow ratio set for each branch pipeline remains unchanged.

Characteristics of Static Balance Valve

1. Excellent regulation performance;
2. Excellent cut-off function;
3. Display the number of opening cycles accurate to 1/10 of a circle;
4. The theoretical flow characteristic curve is an equal percentage (approximate) characteristic, and when the valve weight is 30-50%, the actual flow characteristic is linear;
5. Equipped with opening locking function, non property management personnel cannot change the setting status;
6. It can conveniently and effectively adjust pressure and flow rate, and the supporting intelligent instrument can conveniently display the working pressure difference and flow rate, guide and record the balance adjustment plan;
7. PTFE sealing, reliable sealing performance, long service life;
8. Based on its opening percentage and the pressure difference before and after the valve, the flow rate through the valve can be calculated;
9. The internal components are made of stainless steel and copper alloy, with strong corrosion resistance;
10. The internal lifting valve stem does not require reserved operating space;
11. Valve body material: DN15-DN300 is gray cast iron; DN350-DN600 are carbon cast steel; DN15-DN32 are forged copper alloys.

A balance valve is a type of valve with a special function, and the valve itself has no special features, only the difference in usage function and field. In some industries, due to the significant pressure or flow differences of various flowable substances in different parts of pipelines or containers, valves are installed between corresponding pipelines or containers to reduce or balance these differences. These valves are used to adjust the relative balance of pressure on both sides or achieve flow balance through diversion methods. This valve is called a balance valve.
(1) Linear flow characteristics, that is, under the condition of constant pressure difference before and after the valve, the flow rate and opening degree are generally linearly related;
(2) Accurate opening indication;
(3) There is an opening locking device, and non management personnel cannot change the opening at will; The table connection can conveniently display the pressure difference before and after the valve and the flow rate through the valve. Although balance valves have many advantages, there are still many problems in their application in air conditioning water systems. If these problems are not solved properly, the characteristics of the balance valve cannot be fully demonstrated. The function of a balance valve is to regulate the predetermined flow rate of each distribution point (such as each building) within the system. Balance valves are installed at the entrance of each building to distribute the total flow of the heating system in a reasonable manner.

Adopting a Y-shaped design with multiple rotating scales for adjustment and display of opening range, it provides control capability and can accurately control the entire circulating water or air conditioning system,
Make the entire system achieve the required flow balance. Widely used in cold and hot water systems, it can effectively utilize energy to achieve energy conservation and improve heating (cooling) efficiency.
Firstly, check whether the maximum flow rate of a static balance valve with the same diameter as the pipe can meet the design flow rate. If it meets the design flow rate, it is sufficient. If not satisfied, enlarge the aperture.
A static balance valve is just a globe valve, but with a long stroke, it is easy to control the flow rate.