Graco EcoQuip 2 EQp Operation, Repair, And Parts page 15

Blast Pressure vs. Air Flow Chart
TABLE 1:
1/2 in. (12.7 mm) ID Blast Hose
Gauge
#3 CFM
Blasting Pressure
(m^3/min)
30 psi
(2.0 bar, 0.20 MPa)
40 psi
(2.8 bar, 0.28 MPa)
50 psi 30
(3.5 bar, 0.35 MPa) (.85)
60 psi 37
(4.1 bar, 0.41 MPa) (1.0)
70 psi 43
(4.8 bar, 0.48 MPa) (1.2)
80 psi 49
(5.5 bar, 0.55 MPa) (1.4)
90 psi 52
(6.2 bar, 0.62 MPa) (1.5)
100 psi 57
(6.9 bar, 0.69 MPa) (1.6)
110 psi 60
(7.6 bar, 0.76 MPa) (1.7)
120 psi 63
(8.3 bar, 0.83 MPa) (1.8)
130 psi 66
(9.0 bar, 0.90 MPa) (1.9)
= Not a recommended hose and nozzle combination for given pressure.
How to use the Tables 3 and 4:
1. Determine air flow based on blast pressure, blast hose and nozzle size from Table 1 or 2.
2. Determine pressure drop based on air flow using Table 3 or 4.
TABLE 3:
Pressure drop from the Blast Pressure Gauge to Nozzle using a 50 ft - 1/2 in. ID
Air Flow
30
CFM
(.84)
(m^3/min)
Pressure Drop
3
psi
(.207)
(bar)
TABLE 4:
Pressure drop from the Blast Pressure Gauge to Nozzle using a 50 ft - 1 in. ID
Air Flow
CFM
(m^3/min)
Pressure Drop
psi
(bar)
3A4802D
Nozzle
#4 CFM #5 CFM
(m^3/min) (m^3/min)
44
(1.2)
44 53
(1.2) (1.5)
51 62
(1.4) (1.8)
58 68
(1.6) (1.9)
63 73
(1.8) (2.1)
69 79
(2.0) (2.2)
73 92
(2.1) (2.6)
77 108
(2.2) (3.1)
83
(2.4)
98
(2.8)
105
(3.0)
(15.2 m - 12.7 mm ID) Blast Hose Dependent on Air Flow
40 50 60
(1.12) (1.4) (1.70)
5 7 10
(.345) (.483) (.689)
(15.2 m - 25.4 mm ID) Blast Hose Dependent on Air Flow
100 120 140
(2.83) (3.40) (3.96)
12 14 16
(.827) (.965) (1.10)
TABLE 2:
Gauge
Blasting Pressure
30 psi
(2.0 bar, 0.20 MPa)
40 psi
(2.8 bar, 0.28 MPa)
50 psi
(3.5 bar, 0.35 MPa)
60 psi
(4.1 bar, 0.41 MPa)
70 psi
(4.8 bar, 0.48 MPa)
80 psi
(5.5 bar, 0.55 MPa)
90 psi
(6.2 bar, 0.62 MPa)
100 psi
(6.9 bar, 0.69 MPa)
110 psi
(7.6 bar, 0.76 MPa)
120 psi
(8.3 bar, 0.83 MPa)
130 psi
(9.0 bar, 0.90 MPa)
70 80 90
(1.98) (2.27) (2.55)
13 17 20
(.896) (1.17) (1.38)
160 180 200
(4.53) (5.10) (5.66)
18 20 22
(1.24) (1.38) (1.52)
1 in. (25.4 mm) ID Blast Hose
Nozzle
#5 CFM #6 CFM #7 CFM
(m^3/min) (m^3/min) (m^3/min)
109
(3.1)
108 139
(3.1) (3.9)
124 152
(3.5) (4.3)
104 139 169
(2.9) (3.9) (4.8)
122 153 190
(3.5) (4.3) (5.4)
142 166 213
(4.0) (4.7) (6.0)
148 180 232
(4.2) (5.1) (6.6)
157 198 253
(4.4) (5.6) (7.2)
166 215
- - - -
(4.7) (6.1)
- - - - - - - - - - - -
100 110 120
(2.83) (3.11) (3.39) (3.68)
25 30 35
(1.72) (2.07) (2.41) (2.76)
220 240 260
(6.23) (6.80) (7.36)
23 24 26
(1.59) (1.65) (1.79)
Operation
#8 CFM
(m^3/min)
108
(3.1)
138
(3.9)
159
(4.5)
183
(5.2)
209
(5.9)
236
(6.7)
262
(7.4)
296
(8.4)
- - - -
- - - -
- - - -
130 140
(3.96)
40 45
(3.10)
280
(7.93)
27
(1.86)
15