Static balance valve is also called the balancing valve, manual balance valve, digital lock balance valve, double regulater valve and so on, it is through change the valve core and seat clearance (opening), to change the resistance to flow through valve in order to achieve the purpose of the flow adjustment, its function is the resistance of the object system, can according to the design calculate the new water balance distribution proportion, the selection increase or decrease in proportion , still meet the current climate need part of the under load flow demand, plays the role of the thermal equilibrium.

Dynamic differential pressure balance valve, also say self-reliance type differential pressure control valves, differential pressure controller, variable voltage synchronizer, differential pressure balance valve and so on, it is to use differential pressure to adjust the function of the valve opening, the use of the valve core pressure drop changes to make up for the pipeline resistance changes, so that changes in working condition can keep the pressure difference basically unchanged, its principle is in a certain flow range, can effectively control the controlled system of constant pressure difference, that is, when the system's differential pressure increases, the through the valve shut automatically things, it can make sure the controlled system increases the pressure difference contrast, reduced hours when the pressure difference, the valve to be automatic open big, differential pressure remained constant.

Dynamic balancing valve is also called: self-reliance type flow control valves, self-reliance type balance valves and constant flow valve, automatic balance valve and so on, it is with the system condition (differential) change and automatic change resistance coefficient, in a certain differential pressure range, can effectively control the flow through to maintain a constant, and that is when the valve and differential pressure increases, the through the valve shut automatically small action can keep flow not grow, conversely, when the pressure difference reduced hours, the valve to be automatic open big, the flow is still as constant, but, when the pressure difference less than or greater than the normal work of the valve range, it doesn't offer additional pressure head, this time the valve fully open or seated position to play than still flow set flow low or high can't control.

 
The pressure difference control valves to itself, in control range to be automatic plug for closed on both ends of the valve differential pressure over the set value, the plug automatically open in pressure sensitive film role and automatic regulation under the opening, keep on both ends of the valve differential pressure relatively constant.



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