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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® Ultrapure 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/R50 (345)50 (345)70 (483)
 400 (200)N/RN/RN/R15 (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/R50 (345)50 (345)70 (483)
 400 (200)N/RN/RN/R15 (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/R40 (276)40 (276)55 (379)
 400 (200)N/RN/RN/R15 (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/R20 (138)20 (138)34 (234)
 400 (200)N/RN/RN/R15 (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/R15 (103)15 (103)17 (117)
 400 (200)N/RN/RN/R15 (103)15 (103)
       
1 1/4 (20)75 (24)80 (552)80 (552)80 (552)*N/A
       
40mm (24)75 (24)69 (476)N/A99 (682)N/AN/A

N/R=Not Rated
N/A=Not Available
*=Contact Entegris