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Expected Vacuum Rates
Venturi
Type
Vacuum
Hose Size
Gravel
(lbs/min)
Aluminum Chips
(lbs/min)
Sand
(lbs/min)
Water
(gal/min)
M 1¼" 20 22 17 24

S 1½" 22 22 17 25
D 1½" 35 32 35 48
B 1½" 33 28 29 47
2B 1½" 34 29 25 32

B 2" 39 32 29 81
2B 2" 53 35 32 63

Operating at 100 psi with recommended air line hose.

Vacuum Noise Levels
Vacuum Generating Head
with Venturi Type
Standard Exhaust Noise Level
(dB)
Extra Silent Exhaust Noise Level
(dB)
M 95 88
S 96 85
D 101 87
B 101 94
2B 103 90

Operating at 100 psi with recommended air line hose.