Here's a custom 32bit calculator that converts SCFM to Cv
(and vice versa), as well as calculates pressure drops. Save
it to your desktop and pass it on to your colleagues!
 Please Note: When using the PACulator to specify a MAC
air valve, it is important to understand that the pressure
drop across a valve will vary with many factors, including
ports sizes. Therefore, we recommend two calculations to
generate a "range" of flow required, one with a pressure
drop of 5% absolute inlet, and a second with a pressure drop
of 10% absolute inlet. You can then refer to the Cv values
for MAC Valves at the beginning of their catalog to select
an appropriate valve. At any time, please Provoast
Automation for more help.
 The PAC Cylinder Sizer is a nice Excel document for
understanding the forces generated by certain bore sizes at
different operating pressures. A nice feature of this tool
is it takes the rod diameter into account when calculating
your retract forces.The PAC Cylinder Sizer will also tell you required flow
(SCFM and Cv) based on the data entered to help you size
your air valve for the application. Download and pass it on
to your colleagues!
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This
helpful downloadable PDF gives a general idea of what Cv
rating your valve will require for a particular cylinder
bore operating at a given speed. Be sure to read the note at
the bottom of the chart to ensure you arrive at a valid Cv
required.
