NPT Pipe Elbow, FNPT, MNPT (Street Elbow)
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Applications
- High purity, chemical handling applications in the semiconductor industry
- Corrosive applications in the chemical industry
- Corrosive, high purity Laboratory applications
Specifications
| Part Number | Leg 1 | Leg 2 | Orifice | Dimensions | ||
| A | B | C | ||||
| FME2-2 | 1/8" FNPT | 1/8" MNPT | 0.20" (5.1 mm) | 0.81" (20.6 mm) | 1.25" (31.8 mm) | 0.62" (15.9 mm) |
| FME4-4 | 1/4" FNPT | 1/4" MNPT | 0.29" (7.4 mm) | 0.94" (23.8 mm) | 1.25" (31.8 mm) | 0.75" (19.0 mm) |
| FME4-6 | 1/4" FNPT | 3/8" MNPT | 0.35" (8.9 mm) | 0.94" (23.9 mm) | 1.25" (31.8 mm) | 0.75" (19.0 mm) |
| FME6-6 | 3/8" FNPT | 3/8" MNPT | 0.42" (10.7 mm) | 1.00" (25.4 mm) | 1.25" (31.8 mm) | 0.94" (23.9 mm) |
| FME8-8 | 1/2" FNPT | 1/2" MNPT | 0.53" (13.5 mm) | 1.23" (31.2 mm) | 1.25" (31.8 mm) | 1.12" (28.6 mm) |
| FME12-12 | 3/4" FNPT | 3/4" MNPT | 0.67" (17.0 mm) | 1.78" (45.2 mm) | 1.78" (45.2 mm) | 1.42" (36.1 mm) |
Pipe Thread (NPT) Assembly Procedure
- Apply PTFE tape or paste sealant to MNPT threads starting one thread back from end of fitting.
- When using tape, tightly wrap in direction of threads to conform tape to thread shape.
a. Use 3 1/2 to 4 wraps of tape when assembling PFA threads to PFA material.
b. Use 4 to 5 wraps of tape when assembling PFA threads to a material other than PFA. - Thread the fitting onto the mating component until handtight.
- Using a wrench, tighten fitting about 4 turns past handtight.
PTFE tape = 1/2" wide for all NPT fittings
Note: PTFE tape is not recommended for use in a gaseous application.
Torque (in•lbs x .11298 = newton•m)
| In•lbs | Newton•m | |
| 1/16" | 5.0 | 0.57 |
| 1/8" | 7.0 | 0.79 |
| 1/4" | 16 | 1.81 |
| 3/8" | 23 | 2.60 |
| 1/2" | 30 | 3.39 |
| 3/4" | 54 | 6.10 |
| 1" | 78 | 8.81 |
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