Labconco Protector Filtered Glove Box - Manual (Page 12)

Chapter 2: Prerequisites
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Additionally, the motorized impeller can also be used in a full recirculation
mode providing the operator with some control of the atmosphere chemistry
within the glove box. See Chapter 7 for the Recirculation Conversion Kit.
The airflow charts below represents typical operational data including air
changes per minute, exhaust volume, noise levels, main chamber static
pressures, and total system static pressures measured at the blower intake
(suction side). Exhaust volumes are reduced by 17% for products operating
at 230V. Exhaust volumes are reduced by 22% for ULPA filters. Exhaust
volumes are reduced by 17% for products operating on 100V, 60 Hz and
reduced 34% for 100V, 50 Hz products.
% Blower Speed
Control Setting
Air Changes
per Minute
(ACM)
HEPA Exhaust
Volume
(CFM)
Noise Pressure
dB (A)
Static Pressure
Inside Glove Box
(inches of water)
Total System
Static Pressure
(inches of water)
Min. 18%
35%
55%
75%
Max. 100%
Dial OFF
0.9
1.8
2.8
3.8
5.0
0
15
30
48
65
85
0
52
54
59
63
68
37 0.12
0.30
0.54
0.87
1.28
0
0.31
0.62
1.14
1.65
2.48
0
PROTECTOR HEPA-FILTERED GLOVE BOX
Static Pressure Test Results
0.12
0.19
0.27
0.36
0.52
0.68
0.87
1.02
1.28
0.31
0.40
0.57
0.72
1.12
1.39
1.65
1.94
2.48
0
0.5
1
1.5
2
2.5
10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Airflow Volume (Cubic Feet per Minute)
Nega
ti
ve Sta
ti
c
Pre
ssure
(In
che
s of
Wat
e
r Colum
n
)
Static Pressure Inside Glove Box
Total Static Pressure at Blower
Intake (Suction Side)
Static Pressure test results on the Protector HEPA-Filtered Glove Box
Note: Test results are approximately the same for positive pressure application