Kv is the valve coefficient of the balancing valve. It is defined as the flow rate (m/h) flowing through the balancing valve when the differential pressure of the balancing valve is 1 bar (about 1 kgf/cm2). The valve coefficient when the balance valve is fully open is equivalent to the flow capacity of the ordinary valve. If the opening of the balancing valve does not change, the valve coefficient Kv does not change, that is to say the valve coefficient Kv is determined by the opening degree. By measuring the valve coefficients at different opening degrees, the balancing valve can be used as a throttling element for quantitatively adjusting the flow rate.
When the pipe network is balanced and debugged, the pressure measuring small valve of the balanced valve to be commissioned is connected with a special intelligent instrument by a hose, and the meter can display the flow value (and the pressure drop value) flowing through the valve, and communicate with the instrument man-machine. After inputting the required flow value at the balance valve to the meter, the meter calculates, analyzes, and obtains the opening value of the valve when the pipeline system reaches the hydraulic balance. The balance valve belongs to the category of regulating valve. Its working principle is to change the flow resistance of the fluid flowing through the valve by changing the gap between the valve core and the valve seat to achieve the purpose of regulating the flow.
1. Should not arbitrarily change the balance valve opening degree pipe network system installation, and with the test conditions, use the special intelligent instrument to debug and adjust all the balance valves, and lock the valve opening degree, so that the pipe network achieves the hydraulic working condition balance . During the normal operation of the pipe network system, the opening of the balancing valve should not be arbitrarily changed, and in particular, the opening locking device should not be changed.
2. It is no longer necessary to install a shut-off valve. When a certain loop is repaired, the balancing valve on the loop can be closed. At this time, the balancing valve acts as a cut-off valve to intercept the water flow, and then returns to the original locked position after the inspection is completed. Therefore, if a balancing valve is installed, it is no longer necessary to install a shut-off valve. 3. When the system is added (or canceled), the loop should be re-commissioned. When adding (or canceling) the loop in the pipe network system, in addition to increasing (or closing) the corresponding balancing valve, in principle all new balances are established. The balance valve in the valve and the original system loop should be re-commissioned and set up (the branch balance valve in the original loop does not have to be re-adjusted). In air conditioning and heating systems, the hydraulic balance of the water circulation system as the energy distribution is very important. A balanced hydraulic system is the basis for meeting user needs and saving operating energy.
In air conditioning and heating systems, cold (hot) media is delivered to each user by a closed piping system. For a well-designed pipe network system, each user should be able to obtain the designed water volume when the opening control valve (electric control valve, temperature control valve, etc.) has an opening of 100%, and each user changes the opening of the end control valve. Both the required flow rate and the mutual interference are obtained. Such a water system is a hydraulically balanced system, otherwise it is a hydraulic imbalance system, and the hydraulic imbalance is also called a hydraulic imbalance. This hydraulic imbalance is randomly changing and dynamic. This imbalance phenomenon static balance valve can not be solved, can only be solved with a dynamic balance valve.
Sodium Humate is made by Humic Acid and sodium hydroxide,generally it's used as Feed Additive for different animals,it's also widely used for industry.
For animal use,sodium humate has the following important function:
1.Build up health,improve immunity and meat quality,reduce mortality about 60%.
2.Promote growth,increase the weight around 10%.
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4.Control ammonia&nitrogen,reduce odour caused by excrement and urine,improve the environment for aminal.
5.If used for chicken feed additive,it can help to increase laying rate 8-15%.
6.Complex with the trace elements in feed,promote the absorption and utilization of trace elements,reduce the influence of heavy metals on feed.
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Shandong Chuangxin Humic Acid Technology Co.,Ltd , http://www.humicacidcorp.com