Low Pressure Air throttle valve
Low Pressure Air throttle valve
(OP)
I am designing a low pressure air system to supply dry air to an electronic cabinet.
The supply pressure must be reduced from 2.5 psig to approximately 0.02 psig (0.55 inH20) to supply a flow of 6 SCFH.
What type of throttle device would provide the best control at such a low outlet pressure and flow?
A. pressure regulator
B. needle valve
C. orifice and valve
Any advice, suggestions or links would be greatly appreciated!!
The supply pressure must be reduced from 2.5 psig to approximately 0.02 psig (0.55 inH20) to supply a flow of 6 SCFH.
What type of throttle device would provide the best control at such a low outlet pressure and flow?
A. pressure regulator
B. needle valve
C. orifice and valve
Any advice, suggestions or links would be greatly appreciated!!





RE: Low Pressure Air throttle valve
One possibility you did not list is a purgemeter. This is a small rotameter with a pilot valve (FLOW regulator) on it that senses the flowrate and maintains a constant flowrate regardless of changes in the downstream pressure. OR if your electronic cabinet is not sealed,The downstream pressure will always be atmospheric. Then just use the rotameter with a valve on it. There are also pilot valves to compensate for varyingupstream pressure, if your air system supply pressure swings much.
There are others, but I have had much experience with this:
http:/
RE: Low Pressure Air throttle valve
Here is another thought. Tube the air inlet into the cabinet through a "filter box". If too much pressure, add more filters or go to denser filters. If not enough, take out some filters or go to less dense filters.
"Do not worry about your problems with mathematics, I assure you mine are far greater."
Albert Einstein
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?
RE: Low Pressure Air throttle valve
RE: Low Pressure Air throttle valve