Compressed-Air and Abrasive Consumption

Nozzle Orifice	Pressure at the Nozzle (psi)								Air (In cfm) Abrasive & HP requirements
	50	60	70	80	90	100	125	140
No. 2 (1/8″)	11 .67 67 2.5	13 .77 77 3	15 .88 88 3.5	17 1.01 101 4	18.5 1.12 112 4.5	20 1.23 123 5	25 1.52 152 5.5	28 1.70 170 6.2	Air (cfm) Abrasive (cu.ft./hr & Lbs/hr) Compressor hp
No. 3 (3/16″)	26 1.5 150 6	30 1.71 171 7	33 1.96 196 8	38 2.16 216 9	41 2.38 238 10	45 2.64 264 10	55 3.19 319 12	62 3.57 357 13	Air (cfm) Abrasive (cu.ft./hr & Lbs/hr) Compressor hp
No. 4 (1/4″)	47 2.68 268 11	54 3.12 312 12	61 3.54 354 14	68 4.08 408 16	74 4.48 448 17	81 4.94 494 18	98 6.08 608 22	110 6.81 681 25	Air (cfm) Abrasive (cu.ft./hr & Lbs/hr) Compressor hp
No. 5 (5/16″)	77 4.68 468 18	89 5.34 534 20	101 6.04 604 23	113 6.72 672 26	126 7.40 740 28	137 8.12 812 31	168 9.82 982 37	188 11.0 1100 41	Air (cfm) Abrasive (cu.ft./hr & Lbs/hr) Compressor hp
No. 6 (3/8″)	108 6.68 668 24	126 7.64 764 28	143 8.64 864 32	161 9.60 960 36	173 10.52 1052 39	196 11.52 1152 44	237 13.93 1393 52	265 15.6 1560 58	Air (cfm) Abrasive (cu.ft./hr & Lbs/hr) Compressor hp
No. 7 (7/16″)	147 8.96 896 33	170 10.32 1032 38	194 11.76 1176 44	217 13.12 1312 49	240 14.48 1448 54	254 15.84 1584 57	314 19.31 1931 69	352 21.63 2163 77	Air (cfm) Abrasive (cu.ft./hr & Lbs/hr) Compressor hp
No. 8 (1/2″)	195 11.60 1160 44	224 13.36 1336 50	252 15.12 1512 56	280 16.80 1680 63	309 18.56 1856 69	338 20.24 2024 75	409 24.59 2459 90	458 27.54 2754 101	Air (cfm) Abrasive (cu.ft./hr & Lbs/hr) Compressor hp

*Consumption rates are based on abrasives that weigh 100 pounds per cubic foot.