Restriction Testing
Continuing the same test method as before, I’m measuring restriction or pressure drop over the range of possible flow rates to get a complete look. I simply increase flow across the radiator at .5 GPM increments and record the pressure drop across the rad via manometer. My flow meter is a King Instruments 7520 with valve, my manometer is a Dwyer 477-5 digital manometer, and I have fabricated my own 1/2″copper x 1/4″ brass T fittings to avoid adding restriction to the test.
Radiators are generally pretty low in restriction, so this is normally not something to worry about much unless you plan to run several radiators in series.
First the detailed results:
Followed by a comparison:
Restriction is on the lower side of the slim 30mm competitors and just a touch higher than the RS360. While all the single row radiators are higher in restriction than the more premium thickness double/triple row flavors, it’s still a very low restriction level. It is roughly 1/3rd the restriction of a lower restriction CPU block so you should have no concern about running 2 or 3 in series for extra cooling as need.
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