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3
Special or Critical U
ser’
s Instructions / Br
eathing Air Pr
essur
e T
able
20LF Series Respirator Facepiece
User Manual for use with Supplied-Air Respirators
Special or Critical User’s Instructions
The 20LF Series Breathing Air Pressure Table defines the air pressure ranges necessary to provide 20LF Series respirators with a volume of air that falls within
the required range of 6-15 cfm or 170-425 lpm (42 CFR, Part 84, Subpart J, 84.150).
WARNING
Failure to supply the minimum required pressure at the point-of-attachment for your hose length and 20LF respirator type will reduce airflow and could
result in death or serious injury.
To use the table and identify the proper air flow range; 1) select the air source (Compressed Air or Ambient/Free Air), 2) the use mode (Ambient Temp, Cooling,
Heating), 3) the exact part number of the flow control device; and 4) the length of the air supply hose. Note the maximum hose segments that are approved.
Only use or select a configuration that is specified and has a pressure range provided.
20LF Series Respirator Breathing Air Pressure Table
V10 Hose
Air
Source Usage
Flow Control Device Part
Number
Coupling
Design
25' Max
1 Hose
Length
50' Max
2 Hose
Lengths
75' Max
3 Hose
Lengths
100' Max
3 Hose
Lengths
150' Max
3 Hose
Lengths
200' Max
5 Hose
Lengths
250' Max
5 Hose
Lengths
300' Max
5 Hose
Lengths
Compr
essed Air
Constant
Flo
w
F30/F30B/F30S
Ind. Interchange
16 - 29
18 - 33
20 - 34
22 - 37
26 - 42
29 - 46
33 - 51
35 - 54
F31
Schrader
14 - 27
16 - 31
19 - 33
21 - 35
24 - 41
28 - 45
32 - 49
34 - 53
F32/F33/F34*
Snap-Tite
12 - 21
14 - 26
17 - 28
19 - 31
23 - 37
26 - 42
30 - 46
32 - 50
F37
CEJN
8 - 13
11 - 20
14 - 22
16 - 25
20 - 32
24 - 37
28 - 42
30 - 47
F38
Bayonet
19 - 33
21 - 36
23 - 38
25 - 40
28 - 45
32 - 50
35 - 54
37 - 57
Adjustable
Flo
w
F40/F40B/F40S
Ind. Interchange
23 - 32
25 - 36
27 - 37
28 - 39
31 - 44
34 - 49
37 - 53
39 - 56
F41
Schrader
21 - 29
23 - 33
25 - 35
27 - 37
30 - 42
33 - 47
36 - 51
38 - 55
F42/F43/F44*
Snap-Tite
21 - 27
23 - 31
25 - 33
27 - 36
30 - 41
33 - 45
36 - 50
38 - 53
F47
CEJN
20 - 22
22 - 27
24 - 29
25 - 32
29 - 37
32 - 42
35 - 47
37 - 51
F48
Bayonet
27 -38
29 - 40
30 - 42
31 - 43
34 - 49
37 - 53
40 - 56
42 - 60
Cooling Mode
AC100030/AC100030B/AC100030S
Ind. Interchange
55 - 72
57 - 74
58 - 75
60 - 76
62 - 80
65 - 83
68 - 86
70 - 88
AC100031
Schrader
56 - 73
58 - 76
59 - 77
61 - 78
63 - 81
66 - 84
70 - 88
72 - 90
AC100032/AC100033/AC100034*
Snap-Tite
57 - 75
59 - 77
60 - 78
62 - 79
64 - 82
68 - 86
71 - 88
72 - 91
AC100037
CEJN
58 - 76
60 - 79
62 - 80
63 - 81
65 - 84
68 - 87
71 - 90
73 - 92
AC100038
Bayonet
60 - 77
61 - 80
62 - 80
64 - 82
66 - 85
69 - 87
72 - 91
74 - 94
DC5040/DC5040B/DC5040S
Ind. Interchange
54 - 80
58 - 87
61 - 90
65 - 95
71 - 104
78 - 111
84 - 120
87 - 125
DC5041
Schrader
51 - 74
56 - 82
60 - 85
63 - 88
70 - 98
77 - 105
83 - 113
87 - 120
DC5042/DC5043/DC5044*
Snap-Tite
47 - 73
52 - 81
57 - 85
60 - 89
68 - 99
74 - 106
81 - 116
84 - 122
DC5047
CEJN
40 - 59
46 - 68
50 - 73
54 - 77
62 - 87
70 - 96
76 - 105
82 - 111
DC5048
Bayonet
63 - 88
66 - 92
69 - 93
71 - 97
77 - 107
85 - 110
90 - 118
93 - 125
HC240030/HC240030B/HC240030S
Ind. Interchange
61 - 75
63 - 78
65 - 79
66 - 81
70 - 85
74 - 89
78 - 93
80 - 96
HC240031
Schrader
61 - 76
63 - 79
65 - 80
67 - 82
71 - 86
74 - 91
78 - 94
80 - 98
HC240032/HC240033/HC340034*
Snap-Tite
55 - 69
58 - 72
60 - 74
61 - 76
65 - 80
69 - 83
73 - 88
75 - 92
HC240037
CEJN
54 - 68
57 - 71
59 - 73
62 - 75
65 - 79
69 - 83
73 - 87
76 - 91
HC240038
Bayonet
65 - 80
66 - 83
69 - 84
70 - 86
73 - 90
78 - 94
81 - 97
83 - 101
Heating Mode
HC240030/HC240030B/HC240030S
Ind. Interchange
65 - 84
68 - 87
70 - 88
72 - 90
76 - 94
79 - 98
83 - 102
86 - 105
HC240031
Schrader
65 - 84
68 - 88
70 - 89
71 - 91
75 - 95
79 - 99
83 - 102
85 - 106
HC240032/HC240033/HC340034*
Snap-Tite
62 - 80
64 - 83
67 - 85
69 - 86
73 - 90
76 - 94
81 - 98
81 - 102
HC240037
CEJN
60 - 78
62 - 81
65 - 83
66 - 84
71 - 90
74 - 93
78 - 97
81 - 101
HC240038
Bayonet
71 - 91
74 - 93
75 - 94
77 - 96
81 - 101
84 - 104
88 - 107
90 - 112
Ambient Air
Usage
Part Number
25'
50' Max
1 Hose
Lengths
75'
100' Max
1 Hose
Lengths
150'
200' Max
2 Hose
Lengths
250'
300' Max
3 Hose
Lengths
Constant Flow
F35/F35B/F35S
Ind.
Interchange
4 - 6
7 - 10
10 - 17
13 - 21
Cooling
FRIGITRON2000/ FRIGITRON2000B/
FRIGITRON2000S
Ind.
Interchange
16 - 24
19 - 28
22 - 29
24 - 29
V5 Hose
25’ Max
1 Hose
Length
50’ Max
2 Hose
Lengths
18 - 31
24 - 35
15 - 29
21 - 33
13 - 23
18 - 28
25 - 34
29 - 37
22 - 31
27 - 35
22 - 29
26 - 33
57 - 72
62 - 75
57 - 74
61 - 77
58 - 75
61 - 78
57 - 85
68 - 93
54 - 77
65 - 85
50 - 77
61 - 86
62 - 77
68 - 79
62 - 77
68 - 80
56 - 70
61 - 74
67 - 86
74 - 89
67 - 86
72 - 89
63 - 81
68 - 84
*34/44 fittings not available for V5 Hose.
