Installation, Operation and Maintenance Manual
Butterfly Valves Type 75, 75D Pneumatic Actuated Type TW 10
JIS Standard (10K)
Body Material: PP, PVDF, PDCPD
Nominal Size
mm (inch)
Bolt A Bolt B Quantity
D L S D1 L1 Bolt A Bolt B
Nut &
Wa sh er
450 (18”)
M24
more than
310mm (12.20”) 65mm
(2.56”) M24 more than
120mm (4.72”) 16
8
40
500 (20”) more than
320mm (12.60”)
600 (24”) M30 more than
350mm (13.78”)
75mm
(2.95”) M30 more than
140mm (5.51”) 20 48
Bolt A Bolt B
- The parallelism and axial misalignment of the flange surface should be under the values shown in the
following table to prevent damage the valve.
(A failure to observe them can cause destruction due to stress application to the pipe)
Unit : mm (inch)
Nom. Size Axial
Misalignment
Parallelism
(a-b)
450-600mm
(18”-24”)
1.5
(0.06)
1.0
(0.04)
- When you insert a valve between flanges,
please insert after extending the fields of
flanges fully. (If you insert a valve by force
without fully extending fields of flanges, a
liner may be turned over and suffer a crack.)
Caution
(Axial misalignment) (Parallelism)
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