When speaking of pressure releases, the low pressure gauge will certainly be one item to let off the pressure if it gets above the low gauges limit. A popoff valve would possibly act to save the gauge, if it was quick enough but then we are only speaking of saving a 10-15 dollar gauge so whether we need to repair/replace on or the other, it's not really all that big a deal after the reg has lost the diaphragm!
Kind of like wondering how to save the hubcaps if we drive into a truck!
Note: earlier version before changing it to pre-solenoid..
I tried to explain MY logic for what "I" do no more no less..
BTW.. over pressuring an atomizer.. Just ended poppping a pinhole leak. Ran it at 50psi-ish
Consider it just a suggestion. chances are low (or about equal to any other regulator disaster)..
NOW it certainly isn't fair to compare Milwaukee single stage to what "we" generally use but it does demonstate a principal..
I have the Milwaukee Regulator and that past couple days the pressure has risen after it turns off (I realize this might be caused by the ambient room temp dropping over night, the past few nights have been in the lower 30's). When it is running it shows no pressure.
With the increased pressure (approximately 10 psi), when it switches on in the AM, it goes nuts (major bubbles) and pushes a lot of CO2, and I turn the regulator knob to stop the flow.
I have a Redsea 800. The increased pressure has blown off the bottom of the reactor. And I do believe the oil slick I've been seeing the last week is caused by mineral oil being blown thru when it is first turned on.
Oh forgot to mention that if one wants to bleed the pressure from the reg. pulling the relief valve makes that quite simple.. when it's in the right spot
Note: I also use hose rated at 60psi-ish, well actually rated 50psi, see not totally paranoid.
RELIEF VALVE. Some regulators are equipped with a relief valve. The purpose of a relief valve is to protect the regulator and it components. If there is pressure sensitive equipment downstream of the regulator it is recommended that a relief valve be installed in the line to protect this equipment.