INPUTS
Gas mass flow rate	w		g/s kg/hr kg/s lb/hr lb/min lb/s tonne/d tonne/hr tonne/yr UK ton/d UK ton/hr UK ton/yr
Upstream pressure	P1		atm abs atm gauge bar abs bar gauge dyn/cm2 abs dyn/cm2 gauge in H2O abs in H2O gauge in Hg abs in Hg gauge kgf/cm2 abs kgf/cm2 gauge kPa abs kPa gauge lbf/ft2 abs lbf/ft2 gauge lbf/in2 abs lbf/in2 gauge mbar abs mbar gauge mm Hg abs mm Hg gauge Pa abs Pa gauge
Downstream pressure	P2		atm abs atm gauge bar abs bar gauge dyn/cm2 abs dyn/cm2 gauge in H2O abs in H2O gauge in Hg abs in Hg gauge kgf/cm2 abs kgf/cm2 gauge kPa abs kPa gauge lbf/ft2 abs lbf/ft2 gauge lbf/in2 abs lbf/in2 gauge mbar abs mbar gauge mm Hg abs mm Hg gauge Pa abs Pa gauge
Fluid density	ρ		g/cm3 kg/m3 lb/ft3 lb/in3 lb/UK gal lb/US gal UK ton/yd3
Gas ratio of specific heat capacities	k
Pressure drop ratio factor	XT
Piping geometry factor	FP
OUTPUTS
Ratio of specific heats factor	Fk	1.0000
Pressure drop across valve	ΔP	5.0000	atm bar dyn/cm2 in H2O in Hg kgf/cm2 kPa lbf/ft2 lbf/in2 mbar mm Hg Pa
Pressure drop ratio	X	0.50
Critical flow?		NO
Effective pressure drop ratio	Xeff	0.500
Expansion factor	Y	0.792
Valve flow coefficient	Cv	5.7837