Asahi/America 56 Manual

Butterfly Valve Type 56

Parts Identification

Installation Procedure

Caution
1)The valve disc is set in the position indicated by the solid lines in Fig. 5-1 prior to
shipment from the factory. If the valve is opened or closed after unpacking, it must
be reset in this position before installation. Failure to do so will result in damage to
the surface of the valve seat during handling and installation.
2)The valve must not be dropped or come in contact with other objects, as the sealing
surface of the disc and the sealing surface of the valve seat may be damaged.
3)Care must be used during piping installation to ensure that the pipes or flanges are
properly aligned so that the valve disc does not come in contact with them.
Misalignment as shown in Fig. 5-2 will result in damage to the valve.
4)The installed valve should not be opened or closed when foreign matter such as
shavings, etc. are present from system installation. System should be flushed prior
to operating valves.
To avoid interference the piping ID must be equal to or larger than the D dimension
shown in the following chart. If pipe interference is evident spacers or chamfering of
the pipe or fitting is required.
Nominal Diameter D
Size (inch)
1-1/2" 1.34
2" 1.77
2-1/2" 2.36
3" 2.80
3/15/02
Nominal Diameter D
Size (inch)
4" 3.66
5" 4.65
6" 5.47
8" 7.48
No. DESCRIPTION
1 Body
2 Disc
3 Seat
4 O-ring (A)
5 O-ring (B)
6 O-ring (C)
7 Stem
8 Stem holder (A)
16 Handle (A)
16a Inserted metal of handle 28
Nominal Diameter D
Size (inch)
10" 9.33
12" 11.38
14" 13.39
16" 14.57
Rev B
No. DESCRIPTION
17 Handle lever
18 Pin
19 Spring
20 Washer (A)
21 Bolt (B)
22 Locking plate
23 Screw (B)
24 Cap (A)
25 Gear box
Bolt (C)
Fig. 5-1
NOT RECOMMENDED
RECOMMENDED
Fig. 5-2
Interferrence of the Disc
NOT RECOMMENDED
T56Install