ASAHI AV VALVES Installation Operation and Maintenance Manual
Butterfly Valves Type57L-IS (Lug style) 8
6-1. Used for Lug Style
Torque Wrench Spanner Wrench Bolt, Washer
1) Bolt Length (Flanges: AV TS Flange ANSI) Unit: inch
Thickness of Washer Thickness of Flange Body Insertion Part
Upstream
Side
Downstream
Side
Upstream
Side
Downstream
Side
Upstream
Side
Downstream
Side
Face-to-Face
Dimension
Nominal
Size
a a’ b b’ c c’ e
3” (80mm) 0.13” 0.13” 0.94” 0.94” 0.91” 0.51” 1.73”
4” (100mm) 0.13” 0.13” 0.98” 0.98” 1.02” 0.51” 2.05”
6” (150mm) 0.13” 0.13” 1.02” 1.02” 1.34” 0.63” 2.20”
8” (200mm) 0.13” 0.13” 1.10” 1.10” 1.34” 0.63” 2.36”
The body insertion part (c and c’) above shows the minimum value.
Lug Insert Recommended Bolt Length
Upstream Side Downstream Side
Nominal
Size Internal
Thread
Width
Across Flats
Thickness
of Lug Nut
Bolt
d L1 Quantity L2 Quantity
3” (80mm) UNC 5/8-11 0.81” 1.25” UNC 5/8-11 2.00” 4 1.60” 4
4” (100mm) UNC 5/8-11 0.81” 1.50” UNC 5/8-11 2.20” 8 1.60” 8
6” (150mm) UNC 3/4-10 1.00” 1.50” UNC 3/4-10 2.50” 8 1.80” 8
8” (200mm) UNC 3/4-10 1.00” 1.50” UNC 3/4-10 2.60” 8 1.90” 8
2) Bolt Length (Flanges: Except for AV TS Flange ANSI)
- Bolt Length [L1] = Thickness of Washer [a] + Body Insertion Part [c] + Thickness of Flange [ ] inch
- Bolt Length [L2] = Thickness of Washer [a’] + Body Insertion Part [c’] + Thickness of Flange [ ] inch
Make sure to check whether both upstream and downstream side bolt does not interfere with each other.
Necessary items
Bolt
Bolt
Washer
Flange
Washer
Flange
Upstream Side Downstream Side
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