Blasting Technology, Air and blast grid consumption and information about blasting

Blasting Technology Air and blast grid consumption and information about blasting

Special Advantages of a Venturi Nozzle

The Aerodynamically shaped blower channel makes it possible to reach an twice higher outlet velocity of the sandblasting material air mix than the cylindrical type.
Air and Sandblasting consumption are lightly increasing
The impact velocity decides the removal rate and therefore about the area capacity which is raised up to 40%

Good Sandblasting results are depending from the air pressure and the air amount on the nozzle.

Therefore the compressed air is very important.

i Steel constructions reach the best results at a air pressure of 6-7 bar, Stone and Concrete a pressure of 3-4 bar is recommended.

The Air amount on the nozzle is also very important.

The following tablet should help in finding the right compressor and nozzle type.

Nozzle Aperture		Air pressure on the nozzle in bar
Ø mm / inch	Values	3,5	4,2	5,0	5,6	6,3	7,0
6,5 / 1/4“	m³ Luft /min	1,3	1,5	1,7	1,9	2,1	2,5
	Sandblast Material kg /h	122	142	161	185	204	239
	Necessary Drive PS	10	12	14	15	16	18
8,0 / 5/15“	m³ Air /min	2,2	2,5	2,9	3,3	3,6	4,2
	Sandblast Material kg /h	213	243	275	305	336	409
	Necessary Drive PS	18	20	22	25	28	30
9,5 / 3/8“	m³ Air /min	3,0	3,6	4,0	4,6	5,0	5,6
	Sandblast Material kg /h	303	348	393	436	478	545
	Necessary Drive PS	24	28	32	36	39	44
11,0 / 7/16“	m³ Luft /min	4,1	4,8	5,5	6,1	6,8	7,4
	Sandblast Material kg /h	407	469	535	596	522	750
	Necessary Drive PS	33	38	44	49	54	57
12,5 / 1/2“	m³ Air /min	5,5	6,3	7,1	7,9	8,8	9,9
	Sandblast Material kg /h	527	607	687	764	844	1000
	Necessary Drive PS	55	50	56	63	69	75

To avoid pressure losses the compressor should be installed as close as possible to the sandblasting pot.

The Pipe profiles of the air hoses should be as large as possible to reduce a pressure loss.

The Compressor must be installed in a way that no sandblasting dust is sucked in.