PIETRO FIORENTINI REVAL 182, Use And Maintenance Instructions

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Use, maintenance and warning instructions
MEDIUM PRESSURE REGULATOR | MAINTENANCE AND FUNCTIONAL CHECKS | REV. 00
9.4.1.8 - TIGHTENING TORQUES OF THE HB/97 SLAM-SHUT VALVE WITH LINE OFF 2.0
89
33
32
67
27
81
9
11
89
33
9
32
27
67
81
86
11
4” 6”÷10”
Fig. 9.61. Slam-shut valve tightening torques HB/97
HB/97 DN 4”
Pos. Description Torque (nm) Torque (ft - lb)
9 Locking nut M12X1.25 35 25
11 M12X1.25 balancing piston guide 35 25
27 Screw M10X40 UNI 5737 45 33
33 Nut M12X1.25 UNI 5589 35 25
67 Nut M12 UNI 5588 80 59
81 Screw M8X16 UNI 5931 20 14
87 Screw M6X16 UNI 5931 10 7
Tab. 9.133.
HB/97 DN 6”
Pos. Description Torque (nm) Torque (ft - lb)
9 Locking nut M24X1.5 110 81
11 M18X1.5 balancing piston guide 110 81
27 Screw M14X50 UNI 5737 115 84
33 Nut M18X1.5 UNI 5589 110 81
67 Nut M16 UNI 5588 200 147
81 Screw M8X20 UNI 5931 20 14
86 Screw M6X25 UNI 5931 10 7
89 Screw M6X16 UNI 5931 10 7
Tab. 9.134.
HB/97 DN 8”