Gardner Denver Welch Self-Cleaning Dry Vacuum System DryFast..., Руководство пользователя

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Problem Possible Cause Solution
� External connection leak � Check and tighten all external tubing
connections; check tubing for cracks;
tighten connections in PTFE heads
� Gas Ballast is On � Switch Gas Ballast to OFF position
� Vacuum Control is not Closed � Closed Vacuum control (CW)
� Jar “Intake Side” is not tightened in place � Use Rubber Wrench to tighten jar
� Check vacuum pump pressure with external
vac. gauge, attached to pump inlet fitting
� If external vac. gauge pressure is the
same as unit's display, problem is with
faulty pump or external connection leaks
(mechanical problems)
� Solenoid valve is not operating properly � Valve is always in closed position except
purge cycle. Remove valve silencer and
plug valve inlet with rubber stopper. If
pressure drops it indicates leaky valve.
Insuffic
ient Vacuum
� Internal leak � Bad valve or bad diaphragm; both bad
parts also effect noise; if there is no
vacuum, intake stage is problem.
� Vacuum level around 30-40 Torr
indicates bad exh. stage, valve or
diaphragm.
� Bad valve or diaphragm � Change Valve / Diaphragm
� Loose eccentric or counterweight � Tighten Loose Parts. Use Loctite
� Broken diaphragm threaded insert � Change Diaphragm
� Bad Con-Rod bearing or motor bearing � Change Con-Rod
� Broken motor shaft � Change Shaft
� Loose housing cover � Tighten housing screws on back of unit
Slide rail loose, remove housing cover
and slightly crimp slide rails on inner top
of housing cover. Do not over crimp.
� Loose inlet/outlet jars � Tighten jars
High
noise
� Damaged diaphragm � Check vacuum performance - See Poor
Vacuum section below
If vacuum is still poor, contact
Welch Technical Support*.
� Loose motor mounting screws � Tighten screws
Exces
sive
vibra
tion
� Incorrectly installed counterweight or wrong
C'weight
� Failures described above also contribute to
excessive noise
� Adjust/reinstall/change C’weight
� Indicates partially plugged passage, usually
in exh. stage
� Clean/Unplug Stage
M
ec
ha
ni
ca
l F
ai
lu
re
s
Slow
pump
-down
� Plugged silencer � Unplug /change silencer
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