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Pneumatic Transport and Conveying - Carrying Velocities

Recommended air velocity for pneumatic transport of products like cement, coal, flour and more.

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The table below indicates recommended air carrying velocities in pneumatic solid transport systems.

Product	Approximately Density	Suction Pressure to Pickup	Air Carrying Velocity
Product	(lb/ft³)	(in H₂O)	(m/s)	(ft/min)
Ashes, powdered clinker			30 - 43	6500 - 8500
Ashes from coal	30	3	28	5500
Beans	28	4	31	6000
Buffing dust		2.5	19	3700
Cement	100	5	30 - 46	6500 - 9000
Coal, powered			20 - 28	4000 - 5500
Coffee beans			15 - 20	3000 - 4000
Cork	14	1.5	17 - 28	3000 - 5500
Corn, wheat, rye	45	3.5	25 - 36	5500 - 7000
Cotton, dry	5	2	22 - 30	3500 - 6500
Flour			17 - 30	3500 - 6500
Grain dust			10 - 15	2000 - 3000
Grinding and foundry dust	30	2	17 - 23	3500 - 4500
Jute			22 - 30	4500 - 6500
Lead dust			20 - 30	4500 - 6500
Leather dust			8 - 12	1800 - 2500
Lime, hydrated	30	3	25 - 36	5500 - 7500
Limestone dust			10 - 15	2000 - 3500
Malt	35	3	24	4800
Metal dust			15 - 18	3500 - 4000
Metal turnings		2.5	20	4500
Mineral wool	12	2	22	3500
Oats			22 - 30	4500 - 6500
Paper cuttings	20	3	25	5000
Plastic molding powder			15 - 17	3000 - 3500
Plastic dust			10 - 12	2000 - 2500
Pulp chips			22 - 36	4500 - 7000
Rags, dry	30	2.5	20 - 33	4000 - 6500
Rubber dust			10 - 15	2000 - 3000
Salt			28	5500
Sand			30 - 46	6000 - 9000
Sandblast			17 - 23	3500 - 4500
Sawdust and shavings, light	12	2.5	10 - 17	2000 - 3500
Sawdust and shavings, heavy			17 - 23	3500 - 4500
Shavings, light	9	2.5	22	3500
Shavings, heavy	24	3	20	4000
Sugar			30	6000
Textile dust			10 - 15	2000 - 3500
Vegetable Pulp, dry			23	4500
Wood chips			20 - 25	4500 - 5500
Wool			22 - 30	4500 - 6000

1 lb/ft³ = 16.018 kg/m³
1 in H₂O = 248.8 N/m²(Pa) = 0.0361 lb/in² (psi) = 25.4 kg/m²
Systems for pneumatic transport - Pneumatic transport systems suitable for powder or solids
Pneumatic transport fundamentals - An introduction to pneumatic transport of powders

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Engineering ToolBox, (2003). Pneumatic Transport and Conveying - Carrying Velocities. [online] Available at: https://www.engineeringtoolbox.com/pneumatic-solids-transports-d_134.html [Accessed Day Mo. Year].

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