Installation, Operation and Maintenance Manual
Butterfly Valve Type 55Type 55IS Pneumatic Actuated Type TA
11
- Care must be used during piping installation to ensure that the pipes or flanges are properly aligned so that
the valve disc does not contact them in any setting. Misalignment as in Figure below will result in damage
to the valve.
In case of the thick of the connection part (flange and pipe) is too thick shave the flange or the pipe inside order to avoid the
contact of pipe and disk. If inside diameter of the connection part is larger than size D, shaving is not necessity.
Torque wrench Bolt, Nut, Washer (For many flanges specification)
Spanner wrench or lever handle for Type TA (option) AV gasket (If necessary)
Procedure
1) Leave the valve slightly opened by spanner wrench or lever handle
(Option).
2) Set the valve between the coupled flange.
3) Insert washers and bolts from the pipe side, insert washers and nuts from the
valve side, then temporarily tighten them by hand.
4) Using a torque wrench, tighten the bolts and nuts gradually to the specified
torque in a diagonal manner (Refer to fig.1.)
Unit: mm (inch)
Nominal size
Diameter D
Chamfer angle θ󲘼
Type55
Type55IS
Type55 & 55IS
(2”)
47
(1.85”)
42
(1.65”)
40
(2 1/2”)
-
-
54
(2.13”)
40
(3”)
71
(2.80”)
74
(2.91”)
30
(4”)
92
(3.62”)
94
(3.70”)
30
(5”)
119
(4.69”)
121
(4.76”)
25
(6”)
143
(5.63”)
149
(5.87”)
25
(8”)
182
(7.17”)
186
(7.32”)
15
(10”)
237
(9.33”)
241
(9.49”)
15
(12”)
-
-
293
(11.54”)
15
(14”)
-
-
322
(12.68”)
15
(16”)
-
-
372
(14.65”)
15
Necessary items
Don’t turn the disc beyond the seat.
(Otherwise, the disc may be damaged.)
Interference of the Disc
NOT RECOMMENDED
Fig.2
Caution
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