The flow control valve is a kind of valve which controls the flow of the throttle by changing the hydraulic resistance of the throttle under a certain pressure difference, so as to adjust the movement speed of the actuator (hydraulic cylinder or hydraulic motor). It mainly includes throttle valve, speed regulating valve, overflow throttle valve and diverting and collecting valve. The installation form is horizontal installation. The connection mode can be divided into flange type and screw type; welding type. The control and adjustment methods are divided into automatic and manual.
1. Change the conventional throttle valve to use the orifice plate or pure mechanical principle to reduce the drainage area, and use the related pilot valve to minimize the loss of energy in the throttling process
2. High control sensitivity, safety and reliability, simple debugging and long service life.
The flow control valve can automatically realize the flow balance of the system without an external power supply. The flow restriction is realized by keeping the pressure difference between the front and the back of the orifice plate (fixed aperture). Therefore, it can also be called a constant flow valve.
A constant flow valve acts on the flow and is able to lock in the amount of water flowing through the valve, rather than balancing against resistance. It can solve the problem of dynamic maladjustment of the system: in order to maintain the efficient operation of single refrigerator, boiler, cooling tower and heat exchanger, it is necessary to control the flow of this equipment to be fixed at the rated value; from the end of the system, in order to avoid the mutual influence of dynamic regulation, it is also necessary to limit the flow at the end device or branch.
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