flyrotary@lancaironline.net Mailing List Archive

Todd

Can you explain how using two pressure caps (one 22lb & one 15 lb) add up to a possible total system pressure of 37lbs. I can only see it as a max of 22lbs,

Georges B.

Hi Georges;

The rad caps are differential meaning that they will hold back their rated pressure above the pressure seen at the outlet. So if the the first cap produces a 15 psi increase over atmospheric pressure, then the second cap which has it's outlet plumbed to the 15 psi reservoir will further increase this by it's rated pressure (22 psi in this case) to give a total of 37 psi.

At least that's the way I see it.

Todd