ASAHI AV VALVES Installation,Operation and Maintenance Manual
PDCPD Butterfly Valves 700-1200mm (28”-48”) 2
(2) General operating instructions
- 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.
- Do not step on or apply excessive weight on valve. (It can be damaged.)
- 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 information, refer to
“CHEMICAL RESISTANCE ON ASAHI AV VALVE”.
(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.)
Warning
Caution
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