- 16 -
(1) Stop the pump according to the procedure mentioned in operating instructions of the pump and controller. The air
is eliminated from the dampener after stoppage.
(2) Add the supply air to the auto-dampener while pump is stopped.
(3) Before the pump is stopped for a long time, confirm that pressure is released from the dampener and then stop the
air supply.
3. Stopping
CAUTION
If air supply is interrupted when discharge piping is pressurized, the bellows may be
deformed. Be sure to release the residual pressure.
CAUTION
Do not run the pump in time-lag operation. In the time-lag operation, the bellows of auto-
dampener may fail in a short time. Also pulsation dampening effect can not be obtained.
When the auto-dampener is used, the time-lag should be zero.
Time-lag operation:
When proximity switches detects the bellows movement and the
switching-over signal is transferred to the solenoid valve, the
switching-over signal is outputted with time lag. This is called "time-
lag operation". IWAKI controllers (AC-1, FD, SC and FDC) can not
operate the pump in time-lag operation. Pay attention to the time-
lag operation if the pump is operated by programmable controller or
so.
