Panametrics BWT System, Installation Manual, Page: 23 / 58

BWT™ System Installation Guide 15
Chapter 2. Standard Installation (FTPA Buffers)
3. Turn the nut on the second stud 1/8 turn. The second stud should be diametrically opposite the first stud. Proceed
to tighten the remaining studs in the order shown below, or in a similar manner.
4. Turn each nut an additional 1/8 turn. Be sure to TURN THE NUTS IN THE SEQUENCE SHOWN .
5. Use
Table 1 below to determine the appropriate final torque for your studs.
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)
316 Stainless Steel
1 1/2" ANSI 150# B8M,C,1 1/2" x 3 1/4" 56 (76)
1 1/2" ANSI 300# B8M,C,1 3/4" x 4 3/4" 82 (111)
1 1/2" ANSI 600# B8M,C,1 3/4" x 4 3/4" 82 (111)
1 1/2" ANSI 900# B8M,C,1 1" x 6 " 107 (145)
1 1/2" ANSI 1500# B8M,C,1 1" x 6" 107 (145)
Carbon Steel
1 1/2" ANSI 150# B7 1/2" x 3 1/4" 56 (76)
1 1/2" ANSI 300# B7 3/4" x 4 3/4" 82 (111)
1 1/2" ANSI 600# B7 3/4" x 4 3/4" 82 (111)
1 1
2 2
3
3
4
4
5
6 7
8
4-Hole Flange
8-Hole Flange
Turn first nut 1/8 turn.
1 1
2
2
3 3 4
4
5
6 7
8
4-Hole Flange
8-Hole Flange
Turn second nut 1/8 turn.