Note:
1. The liquid level still continuously ascends after the overflow device has been shut off, possibly
due to:
(1) Residual negative pressure still in the holder;
(2) Valve mouth not fully closed.
For Item (1), the liquid level in the holder will not ascend when the suction tube conductor is
placed again into the liquid as suctioned, and for Item (2), the liquid level still ascends. Thus, it is
required to observe carefully, and lift immediately the conductor out of the suctioned liquid when
the holder is close to full, then, switch off the aspirator to stop suction, and examine the possible
reason of the valve fault.
2. The float is still adhered on the valve mouth as already closed by the float, possibly due to the
negative pressure in the line. At this moment, release the regulating valve or shut off the aspirator
(to release the negative pressure in the line), the float will descends from the valve mouth under
the action of gravity. (It is forbidden to pull the float with hand, in order to avoid the rubber valve
clack being separated from the float);
3. After shut-off, release the negative pressure, then, open the holder plug;
4. Never use the aspirator under the condition of the overflow device & the conductor dismantled.
7. Stop running
Turn off the aspirator switch, and pull the power plug out of the socket to shut off the power supply.
8. Legends & implication for the sake of safety
Symbol
~
16
Meaning
AC power
Protection earthing
Symbol
Note! Refer to the
document on board
Meaning