Alfa Laval CPM-2 User Manual

4Operation
Payattentiontopossiblebreak-down.
Studytheinstructionscarefully.
Theitemsrefertothepartslistandservicekitssection.
4.2Faultnding
NOTE! NOTE!
NOTE!
Studythemaintenanceinstructionscarefullybeforereplacingwornparts-seechapter5Maintenance
Pr Pr
Pr
oblem oblem
oblem
Cause/r Cause/r
Cause/r
esult esult
esult
Repair Repair
Repair
Thevalvedoesnotmaintainthepreset
pressure
FaultydiaphragmReplacethediaphragm
Guide(9)seizesLubricatetheguide(seesection3.1)
Incorrectoperatingrange
Checkthepressuredropoverthevalve
andchecktheflowrate(seechapter
6.2Selection/pressuredrop-capacity
diagram)
Theavailableairpressureislowerthan
theproductpressure
Increasetheairpressureeg.byusing
aBooster(seechapter3.4Fittingof
booster(optionalextra)).
TheairpressureisnotcorrectlyadjustedReadjusttheairpressure
Faultyairpressureregulatingvalveor
incorrecttype
Repairthevalveorcheckthatitis
pressurecompensating
ProductleakageWorndiaphragmReplacethediaphragm
Productaffecteddiaphragm
Airleakage
WornO-ringReplacetheO-ring
Worndiaphragm(10)
Replacethediaphragm
Wornandharddiaphragm(10)
Replacebyadiaphragmofadifferent
gradeforhighertemperature(seechapter
6.1Technicaldata)
Valveplugmovingtoofastupanddown
(unstable)
Pressurepulsationsbecauseoffast
changesinprocessconditions
Useanairthrottlingvalve(optionalextra
betweentheairpressureregulatingvalve
andtheCPM-2valve.
17

Alfa Laval CPM-2 Specifications

General

Brand	Alfa Laval
Model	CPM-2
Category	Control Unit
Language	English