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 SizeInitial Installation Torque (N.m)Max Installation Torque (N.m)
1/8817
1/41428
3/82051
1/23590
3/440113
150137
1-1/460164
1-1/265175
270186

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