Today we’re going to talk about
low-pressure pressure regulators. Pressure regulators are used everywhere in
industry and standard models like these are used
in applications where the pressures are more moderate. Pressures, say… where the supply is a hundred and twenty
psi and you need to regulate at 60 or
80 psi. In those applications these standard industrial models work
great, but there are a lot of applications where you
need to control the pressure at much lower pressures perhaps measured in the inches the water column
below one psi. The problem with using a standard regulator in an application
like that is that the diaphragm sense area is just simply
too small. The diaphragm is not large enough to
effectively sense the pressure being controlled. What you really need to do this increase
that diaphragms surface area as we’ve done with this Equilibar
pressure reducing model. You can see in this model it has a much
larger diaphragm sensing area that is able to detect those very very low pressures. I’ve actually got one in operation right
here. This Equilibar regulator has standard industrial shop air being
supplied to it. It’s got a 0.2 psi setpoint. That’s about six inches of water column and it’s controlling had a flow rate of
about two SCFM, so at a fairly high flow. Equilibar low pressure regulator models are
available in various sizes and pressure ranges. This particular model is available from
zero to six inches of water column full-scale adjustable range. We also offer electronic low pressure regulators. This electronic model, controlled electronically, is able to control as low as zero to
four inches of water column full-scale. If you’d like to learn more about low
pressure regulators visit us on our website at