
Installation Of Pipe Fittings
For tapered pipe fittings PTFE tape or thread sealant should be applied for sealing. Installation steps are as follows.
Step 1: Clean both male and female thread. Remove all the dirt or residual tape.

Step 2: Wrap the thread PTFE tape starting from the first full thread in the direction of thread. 2-4 revolutions of high-quality tape are sufficient. Caution: The tape should not exceed the first full thread as the excess tape may be shredded and get into the fluid system.

Step 3: Cut the end of the tape off or tear it apart. Press the tape into the thread n the direction of thread spiral.
Step 4: Finger tight first. Then use a torque wrench to tighten up. Keep the right direction in order to avoid damaging the thread (refer to the suggested torque in the table below.)
Tapered Thread Size | Initial Installation Torque (N.m) | Max Installation Torque (N.m) |
1/8 | 8 | 17 |
1/4 | 14 | 28 |
3/8 | 20 | 51 |
1/2 | 35 | 90 |
3/4 | 40 | 113 |
1 | 50 | 137 |
1-1/4 | 60 | 164 |
1-1/2 | 65 | 175 |
2 | 70 | 186 |
Safety
- Always use appropriate thread sealant with tapered threads.
- Do not mix NPT and BSPT threads.
- Parallel threads seal with a gasket or O-ring. Never with tape.
For more information contact our sales team: sales@nvfcl.com or call at 01942601209