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HIGH PERFORMANCE BUTTERFLY VALVE
FIGURE HPA
15
Thread size
(inch)
Torque
(Nm)
/ –
/ –
/ –
/ –
/ –
/ –
–
-/ –
-/ –
-/ –
-/ –
-/ –
-/ –
-/ –
–
Table 3 Tightening torque values
APPENDIX A
TECHNICAL INFORMATION
A1. References
Design/pressure-temperature ratings
API 609 Butterfly Valves: Lug- and wafer-type
ASME B 16.34 Valves: flanged, threaded and welding ends
Face-to-face dimensions
API 609 Face-to-face and end-to-end dimensions of valves
End connections
ASME B16.5 Pipe flanges and flanged fittings (NPS 1/2 through NPS 24)
ASME B16.47 Large diameter steel flanges (NPS 26 through NPS 60)
Fire test
API 607 Fire test for soft seated quarter-turn valves
A2. Tightening sequence and torque
Tighten bolts evenly and diagonally opposite to each other or in a crisscross pattern.
Use the torque figures as shown in Table 3.
Fig. 8 Tightening sequence for 12 bolts
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