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Balance valve principle and installation precautions
Hydraulic Balance Valve,jktl valve
Hydraulic Balance Valve,jktl valve
Balance valve is in the hydraulic conditions, play a dynamic, static balance adjustment of the valve. The principle of the balance valve is the anti-regulation within the valve body, when the pressure at the entrance increases, automatically reduce the diameter, reduce the flow of changes, and vice versa. If the reverse, this set of regulatory system will not work. And the role of regulating the valve, there is a directional, reverse the pressure can even reduce or even closed flow. Since the installation of balance valve is to better heating, there is no anti-installed problem. If it is anti-installed,that is, human error, of course, will be corrected. Balance valve belongs to the control valve category,

It works by changing the spool and the seat of the gap (that is, opening), change the fluid flow through the valve resistance to achieve the purpose of regulating the flow. The balance valve corresponds to a local resistance that can be changed by the throttle element, for the incompressible fluid,which is derived from the flow equation.

In the pipe network balance debugging, with the hose will be debugging balance valve pressure valve and special intelligent instrument connection,the instrument can show the flow through the valve value (and pressure drop), with the instrument man-machine dialogue , The instrument input to the balance valve required flow value, the instrument through the calculation, analysis, the pipeline system to achieve the hydraulic balance of the valve opening value. Balance valve belongs to the scope of the valve, its working principle is to change the gap between the spool and the valve seat to change the fluid flow through the valve resistance to achieve the purpose of regulating the flow.

1. Should not be free to change the balance valve opening pipe network system is installed, and have the test conditions, the use of special intelligent instrument on all the balance valve debugging set, and the valve opening lock, the pipe network to achieve hydraulic balance The In the normal operation of the pipe network system, should not change the opening of the balance valve, in particular, should not change the opening lock device.
2. Do not install the shut-off valve again. In the maintenance of a loop, the loop can be closed on the balance valve, then the balance valve to cut off the role of cut off the water flow, after repair and then return to the original locked position. So the installation of a balance valve, you do not have to install the cut-off valve.
3. System additional (or cancel) loop should be re-commissioned in the pipe network system to add (or cancel) the loop, in addition to increase (or close) the corresponding balance valve, in principle, all new balance The balance valve in the valve and the original system loop should be re-commissioned (the branch pipe balance valve in the original loop does not have to be readjusted). In the air conditioning and heating systems, the hydraulic balance of the water circulation system as a power transmission and distribution is very important. A balanced hydraulic system is the basis for meeting user needs and conserving energy consumption. In air conditioning and heating systems, cold (hot) media from the closed pipeline system transmission and distribution to the user. For a well-designed pipe network system, each user should be able to obtain the design water when the opening degree of the end control valve (electrically controlled valve, thermostatic valve, etc.) is 100%, and the opening degree of each user at the end control valve When you can get the required traffic and do not interfere with each other. This water system is a hydraulic balance system,otherwise it is the hydraulic imbalance system, hydraulic imbalance, also known as hydraulic imbalance. This hydraulic imbalance is random and dynamic. This kind of abnormal phenomenon Static balance valve can not be solved, can only use dynamic balance valve to solve.

Kv is the valve coefficient of the balancing valve. It is defined as the flow rate (m3 / h) flowing through the balance valve when the differential pressure is 1 bar (about 1 kgf / cm2) before and after the balance valve. When the valve is fully open, the valve coefficient is equivalent to the circulation capacity of the common valve. If the balance valve opening unchanged, the valve coefficient Kv unchanged, that is to say the valve coefficient Kv by the opening degree. By measuring the valve coefficient under different opening degrees, the balance valve can be used as a quantitative adjustment of the flow of throttle components.

This article is published by jktl Valve Company.