B
minimum pressure is 525 psig for R-410A
1. PRIMING LOSS: This is the suction loss for a pump whose NPSH is (-ve)2. CAVITATION: It is also suction loss by forming cavity of a volatile liquid whose NPSH(a) is belowNPSH(r) eg..Choking or blockage of suction strainers, closing of suction valve of apump when running.3. VAPOUR LOCK: This is also loss of pumping due to blockage in discharge of a pump..closing of discharge valve and running for more time..running the pump with in adequate minimum flow..liquid above boiling pointHence Cavitation, Vapour Lock and Primimng loss are different
p1-p2 = Q8nL/ Pi R^4
for R-22 it's aroung 3 lbs/ton
It depends on the refrigerant you are using, for R-22 it's 72 psi
300psi
it should be 17
250
I am in school with maddy R
This is R-502 with a boiling point at -45 0C.
Standard R-134a coolant will damage an R-22 coolant system because they are chemically different. They also have different characteristics for pressure and freezing point.
I am in school with maddy R
1500 sq in of surface R-22 at120F tons of pressure
60 psi for r-22. 125 for a 410a
There is no real drop-in for R-22; not to mention you have replace the the oil as well, this requires a purge of the lines with an acid, the new replacements refrigerants have a higher pressure as well.
blocked condenser