Compressed Air Volume Required for a Type III‐A Laskin Nozzle Aerosol Generator

Type III‐A Laskin nozzles consume approximately 2.64 cfm (75 lpm) of air at 20 psig (1.4 bar) and 2.88 cfm (81.6 lpm) of air at 23 psig (1.6 bar). Total air consumption is a factor of the number of active nozzles. Therefore, the maximum theoretical compressed air volume required is:

Active Nozzles	Flow Volume (20 psig)		Flow Volume (23 psig)
	CFM	LPM	CFM	LPM
1	2.64	75	2.88	81.6
3	7.92	225	8.64	244.8
6	15.84	450	17.28	489.6

The applied pressure (20 psig for DOP & 23 psig for PAO‐4) should be measured at the nozzle inlet and must remain constant to allow calculation of the aerosol generator output.

NOTE: ATI only recommends calculations when using fewer than 3 nozzles due to interaction of the nozzles within the confined generator reservoir.

Air compressor performance specifications providing output volume (cfm) versus pressure (psig) are available from most vendors and make selection of an appropriate compressor less difficult.