Pumps sizing calculator

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Consider a system such as shown in thefollowing schematic. This is a basic or most common system where pumps are used for fluid transportation.

This page provides a basic calculation tool for sizing of pumps for a system such asgiven in the schematic.

For the schematic givenabove,

FLOW INPUTS
W – Mass Flowrate		kg/hr
ρ – Fluid density		kg/m3
μ – Fluid viscosity		cP
T – Fluid temperature		0C
Pv – Vapour pressure at T		bara
Expected pump efficiency		%
Expected motor efficiency		%
SUCTION SIDE INPUTS
Psv op (suction vessel operating Pressure)		barg
Sll min (Minimum suction side liquid level- refer the schematic)		m
ΔPsuct (Pressure loss across the straight suction line)		bar
ΔPs (Pressure loss across the strainer / filter)		bar
ΔPsother (Additional pressure loss on the suction side from fitting etc.)		bar
Psl (Pump suction nozzle level – refer the schematic)		m
DISCHARGE SIDE INPUTS
Pdl (Pump discharge nozzle level – refer the schematic)		m
Pdv op (discharge vessel operating Pressure)		barg
ΔPdisch (Pressure loss across the straight discharge line)		bar
ΔPcv (Pressure loss across the control valve)		bar
ΔPdother (Additional pressure loss on the discharge side from fitting etc.)		bar
dll max (Maximum liquid level required to be attained on the discharge side – refer the schematic)		m
RESULTS
NPSHa (available)		m
Suction pressure		barg
Dischrge pressure (required)		barg
Differential pressure (required)		bar
Shaft Power (required)		kW
Motor Power (required)		kW