How Do You Control a Proportional Valve for Water?

A proportional control valve is use to control the fluid flow rate. By differing the size of the flow passage through a restrictor. The regulated flow rate comes to adjust parameters affecting. A process in a water system such as control level, pressure, and temperature. The other minor parameters of proportional valve for water include weight, thickness, humidity, density, Ph, color, and viscosity. In an automatic control valve, the restrictor is manage by a signal from a controller which is  an actuator. A proportional fluid control valve utilizes a solenoid as an actuator for variable valve positioning.


What is a Proportional Solenoid Valve:

The proportional solenoi regulator valve is known as a mechanism that manages the flow of liquids and gasses with the use of a restrictor. In various applications. The flow rate controlling impacts the process of a system regarding its level, temperature, thickness, weight, pressure, density, color, viscosity, and color. The actuator of the proportional solenoid controlling valve is use for the positioning of the variable valve.


In comparison to the proportional valves, the traditionally used solenoid valve is a two-way valve, which can be close or open. The proportional regulator offers the same functionality as the traditional one offers. But it offers its features with greater control over the placing of the spool & plunger. They provide a wide range of positions for meeting the requirements of any flow control application. 


For the flow rate regulation, the proportional solenoid valve varies the placing of the valve plunger. The position of the plunger is being controle with the help of the magnetic field. Which is create by the power that is supply by the input it receives to the solenoid coil. Both positions of the proportional regulator valve are open & close and they are placed in the position without the use of power. 

How Does the Proportional Control Valve Operate?  

A direct-operated 2-way standard proportional solenoid valve operates. Very similarly to a direct-operated solenoid valve with the difference that the former. Works through a range of valve positioning while the latter only provides two switching states (i.e. on/off). In a direct-operated proportional solenoid valve, the plunger is the restrictor in the liquid flow control valve. A proportional valve gives a extrude in output stress or goes with the drift withinside the equal ratio because the extrude withinside the enter.

Proportional control is a control system technology base on a response in proportion. To the difference between what is set as the desire process. Variable (or set point) and the current value of the variable.

For an instance, if the entry doubles then the output may even double. Proportional valves may be interconnected with the output from one getting used because of the entrance to another.

How Can I Control the Proportional Valve? 

In principle first of all it is possible to proportionally control the plunger with variable DC voltage, however in practice, static friction on the guide points of the plunger impairs the sensitivity of the proportional valve for water, it results in greater hysteresis effects i.e., the phenomenon in which the value of a physical property lags behind changes in the effect causing it. To save static friction, the normal inlet signal can be convert into a pulse width. Modulate voltage signal (PWM) using special control electronics.


Pulse-width modulation (PWM) is a technique that is often. Use to permit the control of the power supply to electrical devices for proportional control of the water flow valve. The average value of voltage (and current) fed to the solenoid. Is controlle by turning the power switch on and off at a fast rate. This kind of control puts the plunger into a very fast but weak amplitude oscillation. The oscillation puts the plunger in a balanced state which maintains its constant sliding friction. The plunger’s oscillation motion has no effect on the proportional valve for water fluid’s flow behavior.


The longer the switch is on as compared to the off, the higher the total power supplied to the solenoid valve. The term duty cycle explains the proportion of on time. A low duty cycle corresponds to low power since the power is off most of the time of proportional valve for water. The duty cycle is express in percent, 100% being fully on.