ASAHI AV VALVES Installation,Operation and Maintenance Manual
PDCPD Butterfly Valves 700-1200mm (28”-48”) 7
(6) 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 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.
- The gasket is unnecessary. (The seat carries out the role of the gasket.)
- The valve disc is in the position indicated by solid
lines in figure to the right 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.
- 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.
Fig. 6-1
Warning
Caution
Fig. 6-2
INTERFERENCE OF THE DISK
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