A proportional flow control valve can provide an increase in the output flow or pressure in the same proportion as the change in input. For example, when the input is double, the output will double as well. Proportional valves are interconnect to the output of one to serve as the input to the other. They are often programmable and have onboard diagnostics. This makes a high-pressure flow control valve perfect for Industry.
They may also be refer to as…
There are two types of valves including an air proportional flow control valve, I/P or E/P. can also be employed and refer to the current I (4 up to 20mA) or voltage E (0 between 5V and 4) or between 0 and 10V), which is being utilized since the input source to the coil regulates the pressure at which it outputs. They can also be called regulators controlled by electricity.
What Is A Proportional Valve Function?
You may remember the science class experiment, where the application of a current to the coil produces an electric field, which attracts (or repelling) magnetic materials. This is the fundamental solenoid principle.
The higher the current, the greater the power of the magnetic energy field, and consequently, it increases the attraction force (or attraction or) to the material. A proportional flow control valve uses an arrangement that ensures an even field strength with a certain amount of current across the stroke of the magnet.
A spring is use to counteract the force of the magnet. As the force of the magnet is absorb by the movement of the magnet, the spring’s reaction force increases until it equalizes the magnetic force, and then movement stops. When the current is increase, it is possible that the magnet (solenoid) is push further against the spring until forces get balance. If the solenoid is connect to a spool inside a valve. The flow or pressure can be control according to the current applied to the solenoid.
How can you choose the best proportional flow control valve?
- You have to check out the main function of the regulator, which meets your needs. The two major working functions include pressure and flow control.
- You need to check whether the flow control valve can check and maintain temperature.
- Check the repeatability flow.
- Check reverse sensitivity, which helps in changing the flow rate.
How Do I Choose The Proportional Valve?
There are some fundamental parameters to be consider:
- What is being manage? The flow, pressure, or some other feature?
- What will be the required range, and at what flow rates?
- What is the expected operating temperature that the proportional flow control valve is likely to experience?
- Are there any other environmental concerns like explosive, dirty, or wet applications?
- Is the procedure one that is static, step-by-step, or dynamic? This could determine the time to respond and hysteresis efficiency.
- Cost is also an issue when choosing fluid control valves.
Common Applications for the Proportional Valve:
Proportional valves are ideally suit for applications where the flow or pressure has to change, whether during a processor from one stage one step to another. They are reliable, economical, and offer quick and constant control. Proportional valves help to decrease the time to cycle by rapidly achieving an even flow or pressure. A few examples include:
- Filling Up Bottles
The proportional valve ensures constant pressure inside the reservoir that fills it, regardless of the liquid level. A pressure sensor within the reservoir gives information to the valve to ensure that a consistent amount of liquid is deliver to the bottle.
- Furnace Control
The gas supply is control through the proportional valve. An indicator of temperature differential can be use to cut off gas flow when the require temperature is attain.
- Testing For Leaks
The proportional valve may increase pressure with a specific profile to a test piece.
Do I Require Anything Else To Create A Proportional Valve?
Based on the type of proportional flow control valve, an electrical or pilot air supply is require with the proper control. The air might need to be provided at a certain level, requiring the right filters. Feedback sensors are essential for the valve to regulate any specific process, such as the temperature and pressure mentioned earlier. The electronic pneumatic proportional flow control valve needs to be connect to the system properly; therefore, fittings and tubing are require for the betterment of the of the product to produce the require output of the product. So, it’s more important to fit and be connect to the system.