Installation, Operation and Maintenance Manual
Butterfly Valve Type 55Type 55IS Pneumatic Actuated Type TA
(2) General operating instructions
- Never attempt to disassemble an actuator.
(If disassembled forcible, internal parts may jump out and this is very dangerous.)
- Using a positive-pressure gas with our plastic piping may pose a dangerous condition due
to the repellent force particular to compressible fluids even when the gas is under similar
pressures used for liquids. Therefore, be sure to take the necessary safety precautions
such as covering the piping with protective material. For inquiries, please contact us.
For conducting a leak test on newly installed piping, be sure to check for leaks under water
pressure. If absolutely necessary to use a gas in testing, please consult your nearest
service station beforehand.
- 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.
- Do not step on or apply excessive weight on valve. (It can be damaged.)
- Do not use AV valves in a place where they may become submerged in water.
- Do not use the valve in conditions where the fluid may have crystallized.
(The valve will not operate properly.)
- Keep the valve away from excessive heat or fire. (It can be damaged, or destroyed.)
- Always operate the valve within the pressure vs. temperature range.
(The valve can be damaged or deformed by operating beyond the allowable range.)
- Allow sufficient space for maintenance and inspection.
- Select a valve material that is compatible with the media. For chemical resistance
(Some chemicals may damage incompatible valve materials.)
- Keep the valve out of direct sunlight, water and dust. Use cover to shield the valve.
(The valve will not operate properly.)
- Perform periodic maintenance. (Leakage may develop due to temperature changes or
periods of prolonged storage, rest, or operation.)
- Set valve support on the valve.
- The AV valves must be used within the specifications specifically applicable to the Product.
- If the actuator is used in an environment below 5 temperature, its operating fluid must
be free from the water and moisture contained in it because of possible problems due to
the freeze.
- The operating fluid must be clean air filtered through a pertinent air filter.
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