Dynamic Flow Balancing Valve

Posted by Johnson Zhao on May 19th, 2019

The debugging workload is very small, the installation cycle is accelerated, and debugging can be avoided when the system is changed or expanded.

Conveniently correct the difference between actual and design conditions.
Maximum flow limit function.
Ensure dynamic chilled water balancing of the controlled system.
The dynamic differential pressure balancing valve dynamically maintains the pressure difference ΔP between the controlled points constant at the set value, and the Kv value of the other unoperated electric regulating valve does not change, so the water quantity of the branch is dynamically constant. The amount of water in the branch changes only when the electric regulating valve is actuated, that is, when the Kv value changes.
Prevent electric noise and vibration from the electric control valve.
The adjustment valve uses a driver with a smaller driving force.
Provides good valve authority for the regulator valve.
Definition of valve authority:
The pipeline of the fixed and variable flow system is installed at the end without step by step.
The pipeline, branch pipe or riser of the variable flow system is installed without stepping.
The valve of the single-pressure pipe must be installed back to the water, and the valve water supply or return pipe of the double-pressure pipe can be installed.
Selection: The valve body is selected according to the Kv value. The Kv value of the selected valve is greater than the design value. The valve pressure drop is used to calculate the valve Kv value, not the control pressure difference. Select the drive with a controlled differential pressure.
Dynamic differential pressure balance electric control valve
Theory: The essence is that a dynamic differential pressure balancing valve and an electric regulating valve are combined into one. The valve is a double valve cone structure, the upper valve cone is the valve cone of the electric regulating valve, and the lower valve cone is the valve of the dynamic differential pressure balancing valve. Cone, the dynamic differential pressure balancing valve provides a constant pressure difference (0.2Bar or 0.5Bar) before and after the electric valve cone (upper valve cone). The pressure fluctuation of the system is absorbed by the dynamic differential pressure balancing valve, when the electric valve cone ( When the upper valve cone is not actuated, the valve flow capacity kv is constant, and the pressure difference ΔP is constant, so the flow rate Q of the valve is constant; only when the electric valve cone (upper valve cone) acts, the flow through the valve will Changes have occurred, thus achieving a perfect unification of dynamic balance and adjustment functions.