INPUTS
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
Permanent pressure loss across orifice	ΔPpermanent		atm bar dyn/cm2 in H2O in Hg kgf/cm2 kPa lbf/ft2 lbf/in2 mbar mm Hg Pa
Fluid density	ρ		g/cm3 kg/m3 lb/ft3 lb/in3 lb/UK gal lb/US gal UK ton/yd3
Fluid viscosity	μ		cP kg/m h kgf s/m2 lb/ft h lbf h/ft2 lbf s/ft2 P Pa s pdl s/ft2
Ratio of specific heats	k
Flow rate	Q		ft3/min ft3/s litre/s litres/hr litres/min m3/d m3/hr m3/s ml/s UK gal/d UK gal/hr UK gal/min US gal/d US gal/hr US gal/min
Pipe internal diameter	dpipe		cm ft in km m mile mm yd
OUTPUTS
Orifice velocity head loss coefficient	Kpermanent	15.048
Beta ratio	β
Reynolds number	Re	805064
Flow coefficient	C	0.641
Pressure difference across orifice	ΔPorifice	2.983	atm bar dyn/cm2 in H2O in Hg kgf/cm2 kPa lbf/ft2 lbf/in2 mbar mm Hg Pa
Orifice flow area	Aorifice	0.00017	acre cm2 ft2 hectare in2 km2 m2 mile2 mm2 yd2
Pressure ratio	r	0.40
Net expansion factor	Y	0.79
Calculated orifice diameter	dorifice	14.8	cm ft in km m mile mm yd