Davelfc64
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adminParticipantI am not sure there is enough information here to suggest a specific valve. However, you should be able to use a small direct acting valve. The Clippard EV is a great valve and may work for this application.Anyone would need to know the size of th
adminParticipantThe bellows are approximately the size of a 1.5liter nalgene bottle. They are to fill or empty in about one second, going from 0 to 0.3psi. Do you know where we could find a pressure and volume vs fill time chart or formula? I’ve seen them, but on
adminParticipantMaybe I misunderstood what you were originally asking. It sounded like you were filling the bellows with a valve, then dumping to atmosphere using the bellows as the exhaust mechanism.Now that I have a clearer picture of what you are doing I can
adminParticipantI understand what you are trying to do. A single 3-way valve could be used to alternate between pressure and vacuum to the bellows. If you want a third option to block” the bellows to hold the air pressure in it
adminParticipantFirst off, SCFM is the flow of standard cubic foot of free air per minute. This assumes there are no restrictions in the line which could cause pressure drop. An example is a piece of straight pipe. Cv on the other hand takes into account press
adminParticipantHello Marlene,SCFM is a measurement of gas flow under a certain set of circumstances. Cv is a coefficient that can be used in a calculation to determine flow under a certain set of conditions. Cv is really more about a device’s “characteristics”
adminParticipantMarlene,A lot of good information has been offered up on this subject already, but I think that there is one remaining point that makes the distinction between providing Cv vs SCFM for valves and frls. Directional valves (not ball or globe types)
adminParticipantThanks to everyone for answering my question. I have a good understanding of why, so now I can work out how.Thanks again.
adminParticipantThe obvious answer is to put a set of proximity switches on both of the end points of the cylinder. Then time between the two points as the cylinder shifts.It would seem to be fairly easy to calculate by the air flow from the valve to the cylinde
December 8, 2020 at 9:12 pm in reply to: WANTED: Bulb based hand pump / low volume use / accasional use / pressure regulated #21764adminParticipantToddTry Honeywell Controls Part # CCT 852.pressure bulb assembly.Available through:Burke Engineering Cd Jones OrCappNewton
adminParticipantVisit http://www.concentriccontrols.com/. Concentric is the parent company.
December 8, 2020 at 9:27 pm in reply to: Who has low-cost pneumatic solenoids for automation? #21766adminParticipantStock at Hoerbiger-Origa630.871.8300Dan M
December 8, 2020 at 9:27 pm in reply to: Who has low-cost pneumatic solenoids for automation? #21767adminParticipantwe are and Italian company making Miniature Solenoid Valves-10mm and 15mm.We suggest you to visit our site at:www.fimvalvole.com or to contact us for any information or for our catalogue. Fim ValvoleVle Europa -26855-Lodi Vecchio- ItalyTel(39) 037
December 8, 2020 at 9:27 pm in reply to: Who has low-cost pneumatic solenoids for automation? #21768adminParticipantDecember 8, 2020 at 9:27 pm in reply to: Who has low-cost pneumatic solenoids for automation? #21769adminParticipanthow many do you require?
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