- 16 -
Maintenance
3. Wear part replacement
CAUTION
● Turn off power before service
Risk of electrical shock. Be sure to turn off power to
stop the pump and related devices before service is
performed.
● Do not touch the pump or pipe with bare hands
Risk of burning. The surface temperature of the
pump or pipe gets high in or right after operation.
●
Wear protective clothing
Always wear protective clothing such as an eye protec-
tion, chemical resistant gloves, a mask and a face shield
during disassembly, assembly or maintenance work.
■ Pump replacement
Replace the pump at the end of life span or when performance
has remarkably reduced.
Conditions
Part names Diaphragm
Valve
Gasket
<gas transfer>
0.08MPa or below (pressurization)
or 47.99KPa (abs.) or below (vacuum)
4000hr
4000hr
4000hr
<gas transfer>
0MPa
4000hr
4000hr
4000hr
<liquid transfer>
0.05MPa or below (pressurization)
2000hr
2000hr
2000hr
* Part lives vary with the pressure, temperature and character of gas/
liquid. Values on the above table are collected in continuous opera-
tion with 20°C gas or liquid at rated voltage.
■ Diaphragm replacement
1. Unscrew the screws and
take out the pump head A,
valves, gasket and valve
seat A.
2. Turn the diaphragm anti-
clockwise so as to detach it
from the connecting rod.
3. Mount a new diaphragm into
the rod and fasten as far as
it will rotate.
NOTE: Hold the midmost of the
diaphragm then fasten
it. Damage or deforma-
tion of diaphragm will
reduce the pump per-
formance.
4. Push down the diaphragm
until it bottoms out and then
rebuild the pump head.
Fasten the fixing screws by
0.58N•m.
Pump head A
Screw/Washer
Valve
Valve seat A
Gasket
Diaphragm
Valve
Con' rod
