ASAHI AV VALVES Installation Operation and Maintenance Manual
Butterfly Valves Type57L-IS (Lug style) 10
6-2. Used for Wafer Style
Torque Wrench Spanner Wrench Bolt, Nut, Washer
Bolt Length (Flanges : AV TS Flange ANSI)
Bolt Size
Nominal Size d
L
S
Q
uantit
y
3” (80mm) UNC 5/8-11 5.70” 2.00” 4
4” (100mm) UNC 5/8-11 6.00” 2.10” 8
6” (150mm) UNC 3/4-10 6.60” 2.20” 8
8” (200mm) UNC 3/4-10 6.90” 2.30” 8
1) Remove the Lug-insert [1e]. (Fig. 6-2)
2) Install the valve between flanges and open the valve slightly.
3) Insert bolts, set nuts and washer and tighten the bolts and nuts temporarily by hand.
4) Tighten the bolts and nuts gradually with torque wrench to the specified torque in a diagonal manner. (Fig. 6-1)
Necessary items
Bolt
Sea
t
Dis
k
Bod
y
󲗯󲘜󲘑󲘦
󲗯󲘜󲘙󲘡
󲗹󲘢󲘔󲗚󲘖󲘛󲘠󲘒󲘟󲘡
Fig. 6-2 Tap lightly
on the bolt
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