Relief Valve Sizing

Paratherm Heat Transfer Fluids

	Units	HR™	NF©	HE©	OR©	MR™	LR™	CR™
Critical Temperature, Tc(Calculated)	R°	1465	1453	1580	1524	1358	1174	1168
	F°	1005	993	1120	1064	899	714	709
	K	814	807	878	847	755	652	649
Critical Pressure, Pc(Calculated)	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)	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	BTU/lb	110	91	77	93	115	113	148
Molecular Weight avg	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