Relief Valve Sizing

Paratherm Heat Transfer Fluids

Critical Temperature, Tc(Calculated)
Units HR™ NF© HE© OR© MR™ LR™ CR™
ºR 1465 1453 1580 1524 1358 1174 1168
ºF 1005 993 1120 1064 899 714 709
K 814 807 878 847 755 652 649
Critical Pressure, Pc(Calculated)
Units HR™ NF© HE© OR© MR™ LR™ CR™
ATM 18.7 11.1 26.5 13.3 12.9 10.7 28.6
PSIA 274 163 389 196 190 157 421
Critical Volume, Vc(Calculated)
Units HR™ NF© HE© OR© MR™ LR™ CR™
cm3/g-mole 816 1579 720 1380 987 1327 493
ft3/lb 0.037 0.072 0.033 0.063 0.045 0.06 0.023
Heat of Vaporization,DH vap
Units HR™ NF© HE© OR© MR™ LR™ CR™
BTU/lb 110 91 77 93 115 113 148
Molecular Weight avg
Units HR™ NF© HE© OR© MR™ LR™ CR™
MW 239 350 445 360 230 160 133
Constants
k=Cp/Cv = 1.01
C’ = 316.5
R = 82.06 cm3*atm/mol*K
Fb = 1.0