Installation, Operation and Maintenance Manual
Butterfly Valve Type 55Type 55IS Pneumatic Actuated Type TA
10
(10) Specification of speed controller (option)
Actuation
Nom. size
Type sign
Pipe bore
Effective cross section area
(mm2)
Needle No. of
revolution
Free flow
Double actuation /
Air to open /
Air to close Type
50-300mm
(2”-12”)
55,55IS
SC7-08A
Rc 1/4
11
8 turns
350mm,400m
(14”,16”)
55IS
SC7-10A
Rc 3/8
16
(11) Installation procedure
- When suspending and supporting a valve, take care and do not stand under a suspended valve.
- Be sure to conduct a safety check on all hand and power tools to be used before beginning work.
- Wear protective gloves and safety goggles as fluid remain in the valve even if the pipeline is empty. (You
may be injured.)
- When installing a valve, the AV gasket is basically unnecessary. But using a gasket gives more stable
sealing ability in case of using a plastic flange, where easy occurrence of dent, mark or distortion can be
expected.
- When installing a pipe support by means of a U-band or something similar, take care not to over-tighten.
(Excessive force may damage the pipe.)
- Do not install the valve with the disc fully closed. (The disc may pinch into the seat, resulting in a high
operating torque and preventing the valve from operating properly.)
- When installing pipes and valves, ensure that they are not subjected to tension, compression, bending,
impact, or other excessive stress.
- Use flat faced flanges for connection to AV Valves.
- Ensure that the mating flanges are of the same standards.
Warning
Caution
JIS sign
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