Technical Library
Technical documents, guides, and flow controller field notes from the technicians who calibrate, diagnose, and rebuild flow-control equipment every day.
8 articles
MFC-101 4 min read
What You Should Know About Valve Closure
The specification on mass flow controller valve closure references the amount of gas that will leak past the control valve when a zero flow set point is given and a specified pressure differential applied across the device.
MFC-101 4 min read
Problems with Generic MFCs
Many mass flow controller users have experienced costly problems using MFCs that were selected by the so-called generic MFC approach.
MFC-101 3 min read
Problems with MFC Mounting Positions
Calibration of capillary tube thermal sensor type mass flow controllers is essentially a matter of temperature calibration ...
MFC-101 4 min read
Pressure and Your Mass Flow Controller
The main flow-limiting component in a mass flow controller is the control valve. The inlet pressure applied to the controller acts to push gas through the controller. If the controller is feeding into a vacuum, this vacuum aids the gas flow by drawing gas molecules through the controller.
MFC-101 4 min read
Gas Distribution System
Valve sequencing can cause many of the systematic problems encountered with flow control. A common scenario is as follows: during a manufacturing process, a pneumatic on/off valve external to the MFC is closed while a non-zero set point is applied to the MFC.