LV.1~2
11/11
265
260
251
255
252
250
253
254
255
[ Check valve set ]
261
Check valve
abrasion
An oil
countercurrent
Abrasion
process
The damaged
check valve
If the damaged debris flow
in the cylinder, it will cause
the internal damage of the
vane and cylinder as sticking
the parts on the walls.
vacuum pump main inspection provision
Maintenance guide
The inspection and exchange of the check valve
1.
The function of the check valve
The check valve is installed inside of an inlet
port of the vacuum pump.
The role of this valve is to prevent the oil
occurring a countercurrent when the vacuum
pump stops operating forcing the backlashing
in a moment.
2. The exchange period of the check valve.
The check valve
’
s life varies depending on the
working condition.
The process that turns ON/OFF frequently may
shorten the valve
’
s life.
(ex. The hospital suction machine)
Warning
: If the countercurrent occurs towards the
inlet port, inspect and replace the check
valve immediately.
No replacement of the check valve will cause a
severe damage to the vacuum pump.
3. The inspection and exchange method of the
check valve
1) The inlet and check valve
’
s assemble view
The abrasion of the column
250. the check valve
’
s
body
251. the check valve
252. the check valve
’
s
support
253. O-RING
254. the check valve
’
s
spring
255. O-RING
260. an inlet
261. an inlet filter
262. bolt
2) The check valve
’
s exchange method
Remove all the pipe
connected to the inlet
Disassemble the bolts
in the inlet
Separate the inlet
Inspect if operating well
by pushing the check
valve.
Replace the check valve
’
s
components.
Reuse of O-RING will
cause the malfunction.
PF008