Panametrics BWT System, Installation Manual, Page: 24 / 58

Chapter 2. Standard Installation (FTPA Buffers)
16 BWT™ System Installation Guide
6. You must torque the flange studs in small increments. Divide the appropriate torque by 10 to determine the
number of steps. For example, if the required final torque is 90 ft-lb, the remaining steps would be 20, 30, 40, 50,
60, 70, 80 and 90 ft-lb.
7. Set the torque wrench for the first setting and torque the studs in sequence. Turn each stud a maximum of a
1/8 turn at a time.
8. Repeat Step 7 for each of the incremental torque settings.
9. Check the flange alignment again to ensure that the flanges are parallel to each other. Measure the spacing
between the flanges with the caliper on at least four equally-spaced points. The maximum tolerance is ±0.2 mm
difference between the four measured points. If you cannot achieve a tolerance of ±0.2 mm or less, replace the
gasket with a new gasket, and repeat this entire procedure.
10. Repeat the above steps for the remaining flanges.
2.5 Installing the BWT Transducer
Installing the BWT transducers into the FTPA Buffer requires the following three steps:
• Installing and orienting the junction box (see
page 17)
• Inserting the BWT transducers (see page 18)
• Verifying the installation (see
page 19)
1 1/2" ANSI 900# B7 1" x 6 " 107 (145)
1 1/2" ANSI 1500# B7 1" x 6" 107 (145)
Table 1: Final Torques
Flange Size
and Rating
Stud Rating with
4 Studs/Flange
Stud Diameter (in.)
x Length (in.)
Torque in
ft-lb (N-m)
Wrong
Right
Caliper