Does a Mass flow Controller Effects the Pressure
Liquid mass flow controllers are used to measure and control fluid flow rates. They enable the users to obtain the desired mass flow rate by sending an electrical signal as a command. The flow sensor of the controller is exposed to the inlet pressure. This sensor informs the user about the difference between the flow rate coming inside from the inlet and the value of the flow rate set by the user. After knowing that difference, the controller reduces the flow rate through the valve by increasing or decreasing the size of the orifice accordingly. Read further to know more about the effect of the mass flow controller on the pressure.
Understanding the Basic Functionality of Electronic Flow Control:
In the fluid control field, liquid mass flow controllers are some of the most commonly used devices. They are utilized in a large number of applications, from everyday household items (such as the water faucet) to precision medical devices and manufacturing industries.
An integral part of the controller is a flow rate measurement section that includes a sensor, bypass, flow rate, control valve, and special circuitry, which makes it highly efficient and multifunctional. Due to the loop circuit design and mass flow controller working principle, if the supply pressure of the introduced gas changes because of the secondary pressure change, the flow rate will be corrected immediately by the proportional flow control.
A liquid mass flow controller not only lets you monitor the accurate flow rate flowing through a system. Additionally, it automatically controls the mass flow rate of the fluid according to the electrical signal sent to it by the user. These devices keep the flow rate constant until the user sends the next command to make a change in the rate of the flow.
The flow rate and pressure in a pipe are proportional from the perspective of qualitative analysis. This means that as the pressure increases, the flow rate increases as well, and the flow rate is determined by the velocity multiplied by the cross-section of the pipe or with the help of a digital pressure controller. As there is only one outlet on each section of a pipeline, the pressure is only sourced from one end, so the flow is unidirectional. The fluid is forbidden from flowing in the pipe when the outlet is closed (valve closed). As soon as the outlet is open, its flow rate depends on the pipe’s pressure.
When you are choosing a liquid mass flow controller, then it is necessary to consider whether the manufacturer provides you with a zero stability specification or not. By knowing that you will be able to determine the accuracy of the device. Precise electronic pressure controllers let you have significant control over the mass flow rate without needing frequent recalibration or replacements.
Final Words:
When designing a pneumatic system, there are many different fluid controls to choose from. Determining your need that you want to control force (pressure) or speed (flow) is the first step towards selecting which liquid mass flow controller is right for you.