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Maximum Pressure Capabilities
Maximum pressure capabilities of various sizes for various Flaretek® nuts are listed below. (Tubing ratings are included as a reference.) These ratings are provided as a guide in system design. The component with the lowest maximum pressure rating determines your system maximum pressure rating.
Maximum Pressure Rating Chart
Flaretek® Tube Fitting Connections
| Size (X) |
Temperature °F (°C) |
FluoroLine® 4400, 4300 & 4200 PFA Tubing
PSIG (kPa) |
PVDF Nut
FL(X)-1
PSIG (kPa) |
PFA Nut
FL(X)-3
PSIG (kPa) |
CPFA Nut
FL(X)-6
PSI (kPa) |
FlareLock® II PFA Nut
FL(X)ii-3
PSI (kPa) |
| 1/4" (4) |
75 (24) |
273 (1882) |
225 (1551) |
225 (1551) |
225 (1551) |
225 (1551) |
| |
200 (93) |
136 (938) |
133 (917) |
133 (917) |
133 (917) |
144 (993) |
| |
250 (121) |
85 (586) |
100 (689) |
100 (689) |
100 (689) |
120 (827) |
| |
300 (150) |
61 (421) |
75 (517) |
75 (517) |
75 (517) |
95 (655) |
| |
350 (175) |
36 (248) |
N/R |
50 (345) |
50 (345) |
70 (483) |
| |
400 (200) |
N/R |
N/R |
N/R |
15 (103) |
45 (310) |
| |
|
|
|
|
|
|
| 3/8" (6) |
75 (24) |
234 (1613) |
225 (1551) |
225 (1551) |
225 (1551) |
225 (1551) |
| |
200 (93) |
116 (800) |
133 (917) |
133 (917) |
133 (917) |
144 (993) |
| |
250 (121) |
73 (503) |
100 (689) |
100 (689) |
100 (689) |
120 (827) |
| |
300 (150) |
52 (359) |
75 (517) |
75 (517) |
75 (517) |
95 (655) |
| |
350 (175) |
31 (214) |
N/R |
50 (345) |
50 (345) |
70 (483) |
| |
400 (200) |
N/R |
N/R |
N/R |
15 (103) |
45 (310) |
| |
|
|
|
|
|
|
| 1/2" (8) |
75 (24) |
168 (1158) |
190 (1310) |
190 (1310) |
190 (1310) |
190 (1310) |
| |
200 (93) |
83 (572) |
100 (689) |
100 (689) |
100 (689) |
105 (724) |
| |
250 (121) |
52 (359) |
75 (517) |
75 (517) |
75 (517) |
82 (565) |
| |
300 (150) |
37 (255) |
50 (345) |
50 (345) |
50 (345) |
58 (400) |
| |
350 (175) |
22 (152) |
N/R |
40 (276) |
40 (276) |
55 (379) |
| |
400 (200) |
N/R |
N/R |
N/R |
15 (103) |
35 (241) |
| |
|
|
|
|
|
|
| 3/4" (12) |
75 (24) |
107 (738) |
110 (758) |
110 (758) |
110 (758) |
140 (965) |
| |
200 (93) |
53 (365) |
76 (524) |
76 (524) |
76 (524) |
100 (689) |
| |
250 (121) |
33 (228) |
35 (241) |
35 (241) |
35 (241) |
47 (324) |
| |
300 (150) |
24 (165) |
27 (186) |
27 (186) |
27 (186) |
40 (276) |
| |
350 (175) |
14 (95.5) |
N/R |
20 (138) |
20 (138) |
34 (234) |
| |
400 (200) |
N/R |
N/R |
N/R |
15 (103) |
27 (186) |
| |
|
|
|
|
|
|
| 1" (16) |
75 (24) |
77 (531) |
75 (517) |
75 (517) |
75 (517) |
90 (620) |
| |
200 (93) |
38 (262) |
40 (276) |
40 (276) |
40 (276) |
50 (345) |
| |
250 (121) |
24 (165) |
28 (193) |
28 (193) |
28 (193) |
34 (234) |
| |
300 (150) |
17 (117) |
15 (103) |
15 (103) |
17 (117) |
20 (138) |
| |
350 (175) |
10 (68.9) |
N/R |
15 (103) |
15 (103) |
17 (117) |
| |
400 (200) |
N/R |
N/R |
N/R |
15 (103) |
15 (103) |
| |
|
|
|
|
|
|
| 1 1/4 (20) |
75 (24) |
80 (552) |
80 (552) |
80 (552) |
* |
N/A |
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