Download Motor Driven Gear Pumps - PRO-CONS

Dangerspresentin use
The verification
of conformitywith the essentialsafetyrequirements
and regulations
of the Machine
Directiveis effectedby meansof the compilation
of a checklistwhichhas beenpre-prepared
and is
containedin the fechnicalfile.
The lists which are utilised are of three types:
o
listof dangers(as in EN 414 referringto EN 292)
.
(MachineDir.- att. 1, part 1)
application
of essentialsafetyrequirements
.
(EN 60204-1)
electricalsafetyrequirements
The followingis a list of dangerswhich have not been fully eliminatedbut which are considered
acceptable:
r it is possibleto encountersquirtsof oil (for this reasonappropriateprotectiveclothingmust be
worn)
r contactwith oil -> see the requirements
for the use of suitablepersonalprotective
clothing
->
t use of unsuitablelubricant the characteristics
of the fluid are shownon the pumpand in the
manual(in case of doubt contact the Eng. Dept of DropsaSpa)
r protection
againstdirectand indirectcontactmustbe providedby the user
r giventhe purposeof the pump it must alwaysbe functioning;
for this reasonit is necessaryto
pay attentionto the electricalconnectionswhich, in the case of a powerfailure,the customer's
pumpis ableto restart.
machineis restartedonly by meansof a reset,whilethe lubrication
INADMISSIBLE
FLUIDS
I
Fluid
Lubricants
withabrasiveadditives
Lubricants
withsiliconebasedadditives
Petrol- solvents- inflammable
liouids
Corrosiveproducts
Water
Danqer
Hiqhwear rate of contactedoarts
Seizureof the oump
Fire- explosion- damaqeto seals
Corrosionof the oumo- iniurvto oersons
Oxidationof the oumo
8 . T R O U B L E S H OOT IN G
DIAGNOSTIC
TABLE
IND!CATION
The pump does not deliveroil
or does not deliveroil in the
exact quantityprescribed
PROBABLECAUSE
Drawingin air due to the tank
beingempty
The splashfilteris dirtyor
blocked
The connections
are loose
Pumphas deteriorated
Pressureregulating
valve
loose.so the oil returns
immediately
to the tank
beforeflowingthroughthe
deliveryvalve
Releasevalvedamaged
The pump does not deliveroil
at the prescribedpressure
Incorrectsettingof the
regulating
valve
Presenceof dirtunderthe bvpassvalve
REMEDY
Refillthe tankand purgeair
from the system
Washthe filterand blowit
throughwithcompressed
air
Set all connections
ensuring
thereare no leakages
Replacethe pump
Set the regulating
screwuntil
oil exitsfrom the delivery
Replacethe valve
To the pumpoutletconnecta
tubeapproximately
30cm
longwitha manometer
connectedto the freeend.
Regulatethe valveby means
of turningthe screwand
readingthe corresponding
pressurevalueon the
manometer
Disassemble
the valveand
cleanor replaceit as
necessarv