Pratissoli SH Series User manual

Instruction
Manual
SH series

2
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INDEX
1. INTRODUCTION..................................................................................... Pag. 3
2. SYMBOLS DESCRIPTION . ................................................................. Pag. 3
3. SAFETY. ................................................................................................... Pag. 3
3.1 General warnings for safe operation .........................................................Pag. 3
3.2 High pressure unit safety requirements. ...................................................Pag. 3
3.3 Safety of operation ..........................................................................................Pag. 4
3.4 General procedures for high pressure lance/gun operation . ...........Pag. 4
3.5 Safety of maintenance ...................................................................................Pag. 4
4. PUMP IDENTIFICATION ....................................................................................Pag. 5
5. TECHNICAL FEATURES . ..................................................................................Pag. 5
6. DIMENSIONS AND WEIGHT . ..........................................................................Pag. 5
7. GENERAL INFORMATION ABOUT THE PUMP USE . .......................Pag. 6
7.1 Water temperature ..........................................................................................Pag. 6
7.2 Max flow and pressure ratings . ...................................................................Pag. 6
7.3 Lowest operating rpm . ...................................................................................Pag. 6
8. CONNECTIONS AND PLUGS ..........................................................................Pag. 6
9. PUMP INSTALLATION . ......................................................................................Pag. 7
9.1 Positioning . ........................................................................................................Pag. 7
9.2 Direction of rotation . ......................................................................................Pag. 7
9.3 Water connections . .........................................................................................Pag. 7
9.4 Pump feeding......................................................................................................Pag. 7
9.5 Suction line . .......................................................................................................Pag. 7
9.6 Filtration . ............................................................................................................Pag. 8
9.7 Delivery line . ...................................................................................................... Pag. 8
10. START UP AND RUNNING PROCEDURES . ............................................Pag. 8
10.1 Before start up . ................................................................................................Pag. 8
10.2 Starting up . ........................................................................................................Pag. 8
10.3 Water cooling system . ....................................................................................Pag. 9
11. MAINTENANCE INSTRUCTIONS . ...............................................................Pag. 9
11.1 Crank mechanism maintenance . ................................................................Pag. 9
11.2 Fluid end maintenance ...................................................................................Pag. 10
11.3 Pumping unit maintenance . ..........................................................................Pag. 11
12. SCREW CALIBRATION . ......................................................................................Pag. 14
13. MAINTENANCE TOOLS . .................................................................................... Pag. 14
14. PUMP STOPPED FOR LONG TIME .............................................................Pag. 14
15. PRECAUTIONS AGAINST FREEZING .......................................................Pag. 14
16. WARRANTY TERMS . ...........................................................................................Pag. 14
17. EXPLODED VIEWS AND PART LIST ..........................................................Pag. 15
18. TROUBLE SHOOTING . .......................................................................................Pag. 17

3
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1. INTRODUCTION
PratissoliSHhighpressure water plunger pumps have
beendesignedforlonglifeindustrialduties andprovided
theyarecorrectlyinstalledandmantainedwillgivelong
time trouble free operation. Read and understand this
manual before using your pump: it contains the
necessary information for the correct installation, use
andmaintenanceaswell assomepracticalsuggestions
fortroubleshooting.
Whenreceivingyourpumpmakesureofthe good state
of the supply and that no items are missing.
Anymissingitemordamageshouldbereportedbefore
installing and starting the pump.
2. SYMBOLS DESCRIPTION
Warning
Potentialdanger
Readcarefullyandunderstandthemanual
beforeoperatingthepump
Danger
highvoltage
Danger
Wearprotectivemask.
Danger
Weargoggles.
Danger
Wearprotectivegloves.
Danger
Wear safety boots
3. SAFETY
3.1 General warnings for safe operation
Themisuseofanhighpressurewaterunitandthenon-
observance of the pump installation and maintenance
instructionsmaycauseserious damagesand/orinjuries
topeople or properties orboth.
AnyManufacturer/Operatorrequestedto assemble/use
anhighpressure water unit shouldbecompetentto do
so,shouldhave thenecessaryknowledgeoneveryhigh
pressure component installed in the unit and on the
precautionstobetakeninordertoguaranteethe largest
safetymarginsduring operation. No precaution, so far
as is reasonably practicable, should be left out in the
interest of safety, both from the Manufacturer and the
Operator.
3.2 High pressure unit safety requirements
1. a safety valve should be installed in any delivery
line and should be sized to discharge or by-pass
theentirepump flow rate.
2. highpressureunitcomponents,withparticularregard
for those units working outside, should be
adequatelyprotected against rain, frost andheat.
3. electriccomponentsandwiringsshouldbeprovided
withanadequatedegreeofprotection,abletoprotect
themagainstspraycomingfromanydirection.They
should also be suitable for working in a wet
environment.
4. highpressurehosesandanyotheraccessoryunder
pressure should be sized in accordance with the
max unit working pressure and must always work
within the safety margins indicated by the hose/
accessoryManufacturer.
5. high pressure hose ends should be fastened to a
steadybodyinordertopreventthemfromdangerous
sweepingaround,shouldtheyburstorcomeofftheir
endfittings.
6. proper safety guards should be provided to
adequatelycovertransmissionjoints,pulleys, belts,
auxiliarydrives.

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3.3 Safety of operation
Theaccessintotheareawhereanhighpressureunitis
working should be strictly prohibited to unauthorised
personnel. The area should be suitably enclosed and
its perimeter, so far as is reasonably practicable,
cordoned off and proper warning notices displayed in
prominentpositions.
Personnelauthorisedtoenterthatareashouldhavebeen
previously trained to do so and informed on the risks
arising from failures, misuse and any unforaseeable
circumstancewhichmayoccurduring operation.Before
startingthepumpunitandbringingit up to pressure the
Operatorisrequestedtocarryoutthefollowingchecks:
1. makesurethat a correct watersupplyto the pump
isprovided.
2. makesurethatwaterinletfiltersareproperlyclean.
3. electrical components and wirings, with special
emphasisonconnections,junctionboxes,switches
and supply cables should be free from external
damages (i.e. exposed and broken wires) and
adequatelyprotectedagainstwater.
4. high pressure hose should not show apparent
external wear and the fittings at both ends should
befreefrom signs of erosionorcorrosion.
5. make sure that all fluids (lubricating oil for pump
and engine, cooling water, hydraulic fluids) are at
properlevelandingoodcondition.
6. makesurethesafety guardsareingoodconditions.
Theworkshouldstopimmediatelyandthepressuremust
bereleasedin theeventthatleakagesbecomeapparent
or if any person becomes aware of any change in
conditionor any hazard existingorbeing introduced.
Anyfailuremustbe promptlyreportedandthenchecked
bycompetentpersonnel.
3.4 General procedures for high pressure
guns/lances operation.
1. the Operator should take reasonable care of the
safetyof himself andof other personswho may be
affectedbyhisactsoromissionatwork.Hisactions
shouldbe always governed by hisgoodsense and
responsability.
2. The Operator should wear suitable waterproof
protectiveclothings,havingregardtothetypeofwork
being undertaken. The clothing set should include
adequate hand protections, suitable boots able to
ensure proper grip on wet floors, helmet provided
with full face shield, waterproof garment providing
fullcover to the Operator,including his arms.
Asmostofwaterjetsproducenoiselevels inexcess
of90 dB(A) suitable earprotectionis advised.
Note:it must be emphasised that whereas protective
clothingprovidesadequate protectionagainstsprayand
flying particles, it does not constitute complete
protection against the direct impact of the water jet.
Additional protections in the form of suitable metal
shieldsor barriers may benecessaryforcertain jetting
operations.
3. inmostjettingoperationsitisanacceptedpractise
to employ a team of Operators consisting of two
members at least, in order to provide mutual
assistanceincaseofneedandtorotatetheir duties
in case of long and heavy work. While the first
Operatorholdsthegun,thesecondOperatorattends
the pump unit, keeping close watch on the first
Operator for signs of difficulties or fatigues, and
watchingthesorroundingareafor intrusionbyother
personsorunsafesituations. Ifrequired,hewillshut
off the pressure until it is safe to continue.
4. theareainwhich the workisto proceed should be
clear of loose items and debris to prevent tripping
andslippinghazards.
5. the water jet should be directed only and always
against the workpiece, even during preliminar
operating tests prior to starting work.
6. where applicable, proper side shields should be
suitably placed to safeguard personnel and
equipment against contact with grit or particles
removedbythe water jet.
7. on no account must the Operator be distracted
during operation until the jet has been stopped.
Personnel having reason to enter the water jetting
area should wait until the jet is stopped and his
presenceknown.
8. each team member must always be aware of the
actions and intentions of other team members in
ordertoprevent any dangerous misunderstanding
occuringduringjettingoperation.
9. thepumpunitshouldnotbestartedand brought up
to pressure unless each team member is in his
designated position, the nozzle directed to the
workpiece and the lance or gun securely held.
3.5 Safety of maintenance.
Apartfromtheworkingpressureregulationnoattempt
should be made to adjust any nut, hose, fitting, ect,
while that part of the system is under pressure. The
pump should be stopped and any pressure in the line
releasedprior to makeanyadjustment.
1. the high pressure water unit should be mantained
inaccordancewiththeManufacturer’sinstructions.
2. the unit should be maintained only by competent
personnel.
3. serviceandmaintenanceshould becarriedoutwith
propertoolsinorder to preventanydamageonhigh
pressureconnections and fittings.
4. use of other than original spare parts is strictly
forbidden.

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Fig.1
6. DIMENSIONS AND WEIGHT
Fig.2
5. TECHNICAL FEATURES
Model Flow rate Pressure Power
SH 20
SH 22
SH 24
SH 26
SH 28
l/min Gpm bar psi kW Hp
44 11,6 1400 20300 117 160 43 11,3 1400 20300 117 160
53 14,0 1100 15950 110 151 52 13,7 1100 15950 110 151
63 16,6 950 13800 114 155 62 16,3 950 13800 112 153
74 19,5 800 11600 113 153 72 19,2 800 11600 110 150
86 22,7 700 10150 115 156 84 22,3 700 10150 113 153
98 25,9 600 8700 112 152 96 25,6 600 8700 110 150
Flow rate Pressure Power
l/min Gpm bar psi kW Hp
1750 rpm (R = 1:3,389) 1500 rpm (R = 1:2,95)
SH 30
2
8
3
5
7
6
4
front feet
rear feet
Weight: 378 Kg
4. PUMP IDENTIFICATION
Eachpumpisfittedwitharatingplate1Fig.1containing
thefollowinginformation:
2. pumpmodelandversion.
3. serialnumber.
4. max r.p.m.
5. maxoperatingpressure(bar).
6. oil capacity (ltr.) and oil specification.
7. gearboxratio
8. max flow rate (l/min).
Pumpmodel, pump version andserialnumbershould
be specified when ordering spare parts. Should the
pumpbemodified(i.e.bychangingtheoriginalversion)
then any change should be mentioned on the rating
plateforfuturereference.

6
SH 8. CONNECTIONS AND PLUGS
SH pumps are provided with (Fig.3):
1 - N°2 inlet ports IN G 1”1/2.
Suctionlineconnection toeither inlet portis acceptable,
the port not being used should be hermetically sealed
with the correct plug.
2 - N°2 outlet ports OUT Ø 14 mm.
3 - N°2 outlet ports OUT G1/2” (designed for pressure
gauge and safety valve only).
4 - N°1 DRAIN port provided with quick coupling for
connectionwithRilsanairhoseØ10mm., it collects
the water drainage from the cooling system and
should be connected back to the suction line
BEFOREthefeed pump.
The SH pump is supplied with 4 conical seals
(Fig.4)madeofstainlesssteelanddesignedto provide
total sealing of the outlet connections. They must be
usedineithertheoutletportsoftheheadorinthe outlet
portsof the optional outletmountingflanges.
The conical seals should be replaced at any
disassembling and not re-used.
Fig.3
Fig.4
CONICAL SEAL
FITTING/PLUG
FLUIDEND
IN
DRAIN
OUT
OUT
OUT
IN
OUT
4
7. GENERAL INFORMATION ABOUT
THE PUMP USE
The SH pump has been designed to pump fresh and
filteredwateratroomtemperature.
7.1 Water temperature
The max admitted water temperature is 30°C.
7.2 Max flow and pressure ratings
Theperformancedataindicatedinthecatalogueandin
the rating plate refer to the maximum performance of
the pump. The use of the pump below the rated
performancesdoesnotallowthedropinpowerabsorbed
tobebalancedbyalteringthe pressure or volumeofthe
pumpaboveitsmaximumvalue.
7.3 Lowest operating rpm
Thelowestoperatingspeedforall SH’s (all versions) is
350rpm.

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9. PUMP INSTALLATION
9.1 Positioning
The pump should be installed flat on a rigid base by
means of the four feet Ø 19 mm.
The base should be rigid enough to avoid any
misalignment of flexing of the pump/transmission
couplingaxisduetothetorqueinvolvedduringoperation.
9.2 Direction of rotation
Thefig.5showsthecorrectdirectionofrotationlooking
atthepumpfromthefluidendside. Twoarrowsstamped
on the crankcase nearby the crankshaft provide the
informationaswell.
9.3 Water connections
Inordertoisolatethehighpressure equipment from the
pump vibrations it is suggested, where applicable, to
useflexiblehoses for both suctionanddeliverylinesat
least for the first length.
9.4 Pump feeding
SH pumps require an inlet pressure at the suction port
of at least 5 bar (73 psi) up to 7 bar (100 psi).
Thefeedingpumpshouldbeofacentrifugaltype,supply
atleasttwice the rated SHpumpflowrateat the above
requiredpressuresinanyworkingconditionatanypump
speed. The feeding pump should be operated
independentlyfromtheplungerpump.
The SH pump should be started only when the inlet
pressure is 5 bar (73 psi) at least.
A pressure switch to control the correct inlet pressure
should be always installed in the suction line after the
filters.
Fig.5
FLUIDEND
LX SIDE
anti
clock wise
RX SIDE
clock wise
9.5 Suction line
For the correct pump operation make sure that the
suction line meet with the following specifications:
1. Internal diameter should be at least 38 mm. in any
point, possibly larger depending of the drop in
pressure due to the length and shape of the line.
2. should be as straight as possible minimizing
changesinsizeanddirection andpositionedinsuch
a way to allow air pockets and bubbles to escape.
3. shouldbeperfectlyairtight.
4. shouldbecompletelyfreefrom90°elbows,diameter
reductions, counter slopes, “T” connections and
should not be connected to other pipelines.
5. should be positioned in such a way to prevent the
pipe emptying after the pump stops.
6. do not use high pressure flexible hoses for the
suction line.
7. do not use high pressure hydraulic fittings like 90°
elbows,highpressureadaptors,highpressure3or
4 ways nipples and so on.
8. donotinstallanykindofdetergentinjetoralongthe
suction line.
9. donotinstallstandingvalves,check valves orother
kindofone-wayvalves.
10. makesurethat thefeedtank capacityandthe water
minimum level do not give rise to turbulence at the
tank outlet port, which, in turn, might create
cavitationatthefeeding pump.
11.donotconnecttheby-passlinefromthevalvedirectly
to the pump suction line.
12. thewaterflow fromthevalveandthe coolingsystem
shouldbedirectedback in the tank. Make sure that
theby-pass and tank feedingflowsdonot give rise
to turbulence at the tank outlet port, which, in turn,
mightcreatecavitationatthefeedingpump.Proper
baffleplatesshould be provided inside thetank.
13. beforeconnecting the suctionlinetothepumpinlet
port make sure the pipe is perfectly clean inside.

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9.6 Filtration
VS pumps require 10 to 20 microns water filtration
degree. For a correct filtration system three individual
filterunitsshouldbeprovidedandpositionedas shown
by Fig 6.
The filters should be installed as close as possible to
thepump,alloweasyinspectionandhavethefollowing
specifications:
a. capacityofeachfiltershouldbeatleast three times
theratedpump flow rate.
b. filterportdiametersshouldnot be smaller thanthe
pump inlet ports.
c. Filtrationdegreeofeachfiltershouldbe as follows:
Filter n°1: 250 microns
Filter n°2: 70 - 100 microns
Filter n°3: 10 - 20 microns
IMPORTANT NOTE: inordertoproperlysafeguardthe
pump it is very important to plan cleaning of the filter
with a frequency depending on the water quality,
filtration degree and number of hours of each
application.
9.7 Delivery line
For a correct delivery line comply with the following
instructions:
1. thefirstlengthofdeliveryhoseshouldbeflexiblein
ordertoisolatethepumpvibrationsfrom the rest of
the system.
2. use only high pressure hoses and fittings able to
guarantee the largest possible safety margins in
anyworkingconditions.
3. a suitable relief valve should be installed in the
deliveryline.
4. useglycerinfilledpressuregauges,beingthemost
suitablefor pulsating loads.
5. When designing the delivery line, take into proper
account the unavoidable drop in pressure, due to
its length and size.
Fig.6
MM
123
0bar 5bar
min.
10. START UP AND RUNNING
PROCEDURES
10.1 Before start up
Beforestartup make sure thatthefollowingconditions
havebeencompliedwith:
1. suctionlineshouldbeconnected:the pump must
never run dry.
2. suction line must be perfectly air-tight.
3. any ON-OFF valve in between pump and water
source should be open and make sure the water
gets into the pump freely.
4. set the pressure line in dump mode in order to let
the air in the pump get out easily thus facilitating
thepumppriming.
5. makesureallsuction/deliverylineconnectionsare
fullytightened.
6. Joint alignment, belt tightening and PTO shaft
inclination tolerances should remain within the
valuesindicatedby the trasmission Manufacturer.
7. make sure of the correct oil level.
Note: in case the pump has not run for a long period
check the suction and delivery valves for scaling
10.2 Starting up
1. pump and motor/engine should start offload, set
theregulatingvalve to zero orsetthepressureline
indumpmodebymeansofproperdumpingdevices.
2. make sure the pump starts only when the correct
inletpressureisprovided.
3. whenstartingthepumpup for the first timeorafter
every wiring re-connection check for the proper
directionofrotation.
4. checkthattherotating speed does notexceedthe
ratedvalue.
5. beforeputtingthepumpunderpressureletitrun for
some time until the oil flows freely.
6. beforestoppingthepumpreleasethepressurefrom
the system by operating the dump device or by
releasingthe regulating valve andreducerpm to a
minimum(dieselapplications).

9
SH 11. MAINTENANCE INSTRUCTIONS
11.1 Crank mechanism maintenance.
Check oil level through the oil level indicator (1, Fig.8)
at least on a weekly basis.
If necessary, top up from the oil plug 3, Fig.8.
Check the oil when cold and change the oil when still
hot(pump still at workingtemperature).
In order to drain the oil from the pump remove the
magnetic plug 2, Fig.8.
Ateveryoilchangecleanthemagneticplug2Fig.8and
checkthelower coverofFig.7forsedimentsordeposits.
10.3 Water cooling system
Duringoperationthecoolingwaterisdrainedoutof the
pump through the port (4, Fig.7) located underneath
the pump head. The cooling water line should be
connectedtotheinletlineBEFORE the feed pump as
shown below.
BRAND TYPE
AGIP ACER 220
ARAL MOTANOLHP 220
AVIA AVILUB RSL 220
BP ENERGOL HL 220
CASTROL ALPHAZN220
ESSO NUTO 220
FINA SOLNA220
IP HYDRUS 220
MOBIL DTE OIL BB
SHELL TELLUS C 220
TEXACO REGOL OIL 220
TOTAL CORTIS 220
Fig.8
MM
123
0bar 5bar
min.
4
Fig.7 2
3
1
OIL CHANGES hours Q.ty
Lt. Oil
type
1° change ISO
220
14
50
further changes 500
Oil should be changed at least once a year.
Recommendedoils:

10
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Removethepumphead(Fig.12).
Whenremoving the head fromthepump pay attention
tothevalveseats (1, Fig.13)andthesuctionvalvedisks
(2Fig.13) which mayfalloff the head.
Check the cooling system orifices of the head (see
arrows)andtherelevantwhitetips(3,Fig.13)fordeposits
orsedimentsthatmaypreventcoolingwaterfromflowing
through.
Removethevalveseats(1,Fig.14)fromthehead,check
themfor wear and replaceifnecessary.
BEFOREREPOSITIONINGTHEVALVEUNITSBACK
INPLACECLEANANDPERFECTLYDRYALLVALVE
HOUSINGSINSIDETHEHEAD.
VALVE RINGS (2, FIG.14) AND ALL O’RINGS
SHOULDBEREPLACEDAT EVERYINSPECTION.
11.2 Fluid end maintenance
Thefluidenddoes not require periodical maintenance.
Service operations are limited to the valves inspection
and/orreplacement,whennecessary.
Inordertohave access to the delivery valvesloosethe
12 valve cover screws (1, Fig.9) and remove the valve
covers.
Once removed, take out the delivery valve guide with
the spring and valve disk. An M10 threated bolt to be
used as a simple extractor would help the operation
(seeFig.10).
Looseandremove the 8 headscrews(1Fig.11).
Fig.11
Fig.9
1
1
Fig.10
Fig.12
Fig.13
123
3
Fig.14
1
2

11
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11.3 Pumping unit maintenance.
Theonlymaintenanceoperationrequiredforthepumping
unit is the visual check of the amount of water drained
out by the cooling system through the hole provided
underneath the head (Fig.7, page 9). It clearly shows
thepressure packingstateofwear. Pressurepackings
should be replaced when vibration and/or drop in the
operatingpressurestart to occur during operation.
Removetheeight head screws (1 Fig.17).
Removethepumphead(seechapter11.2).
Take out the collector (1, Fig.19).
Reassemblevalvesandheadbackinplace
by following the disassembling steps in the
oppositesequenceand useatorquewrench
at the following settings for the valve cover
screws and head screws :
-Valve cover screws: 20kgm.
-Head screws: 55 kgm.
NOTE:
Inordertofacilitatereassembling operation useourtool
1,Fig.15(p/n2000.3014.0forSH20-24,p/n2000.3013.0
for SH26-30) or equivalent, able to hold the valve seat
andvalvediskinplace when mounting the head onthe
pump(seearrowFig.16).
Fig.17
1
Fig.15
1
Fig.16
TOOL VALVESEAT
Fig.18
Fig.19 1

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Removetheseeger1,Fig.23.
Removetherearsealsupport1,therearseal2andthe
O’ring3, Fig.24.
Insert a pin of adeguate dimensions and smartly beat
till the complete pressure packing set is out (Fig.25).
Replace pressure packing set at every inspection.
Removetheuppercover (1,Fig.20).
Once head and collector are removed the cylinders 1,
Fig.21 are free to be taken out of the pump body.
Beating the cylinders all around with a plastic hammer
helps to loose them from possible scaling or deposit
accumulatedduringoperation.
Oncethecylinders are removed, loosetheplungers
andcheck them for wear(Fig.22).
Replaceifnecessary.
Fig.20
1
Fig.21
Fig.22
1
2
Fig.24
Fig.23
1
1
Fig.25
3

13
SH
Fiteachnewcomponentofthepressurepacking set in
thecylindermaking sure of thecorrectorderasshown
in Fig.26:
1 Packingbushing
2 Packingring
3 Back packing
4 Pressurepackings
5 Pressurepackingretainingbush
Each pressure packing set component should fit tight
inthecylindersbecauseof alittleinterferencedesigned
in the ext. diameter. Apin of adeguate dimensions (1,
Fig.27) helps in guiding each component straight and
alligned all the way down in the cylinder.
Fig.27
Fig.26
1
2
3
4
5
The new rear seal should be mounted with the larger
diameter side first in, as shown in Fig.28.
Reassemble the pump following the
disassembling steps in the opposite
sequence and use a torque wrench for the
screws listed below:
-Plungerscrews: 10 kgm
-Headscrews: 55 kgm
-Valvecoverscrews: 20 kgm.
Fig.28
1

14
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12. SCREW CALIBRATION
Screw calibration is to be carried out by
meansof a torque wrenchonly:
DESCRIPTION Kgm.
valvecoverscrews 20
headscrews 55
plungerscrews 10
connectingrodscrews 7,5
13. MAINTENANCE TOOLS
Thefollowingtoolsaredesigned to
facilitatemountinganddismounting
operationsofsome pump components:
fordisassembling:
- cylinder extractor cod.2000.0019.0
forassembling:
-head/valveseattoolSH20-24 cod.2000.3014.0
-head/valveseattool SH26-30 cod.2000.3013.0
14. PUMP STOPPED FOR LONG
TIME
Beforestartingthepumpupfortheveryfirst
time after a long period from the date of
shipment check for the correct oil level,
checkthevalvesasindicatedinthechapter
11 and then comply with the starting
procedures indicated in the chapter 10.
When a long inactivity is scheduled drain
theentiresuctionanddelivery line and then
run the pump dry only for a few seconds
inordertodrainoutthewatercollectedinside
thefluidend.
15. PRECAUTIONS AGAINST
FREEZING
In the risk of freezing the following
precautionsshould be taken:
:
- afterusedrain the entire suction and deliverylines
(filter included) by means of discharging devices,
providedandpositionedspecifically forthispurpose
along the lowest point of the lines.
- run the pump only for a few seconds in order to
drainthe water collectedinside the fluidend
Or,whenapplicable
- addarecommendedamountofanti-freezeintothe
water tank and run the pump until the anti-freeze
works all through the system.
IfapumpisfrozenorappearsfrozenONNOACCOUNT
SHOULD THE PUMPBE OPERATED until the entire
system has been thawed out.
16. WARRANTY TERMS
Pratissoliproductsarewarrantedtobefreefrom defects
in workmanship and material for 12 months from the
dateofshipment.Thiswarrantyislimitedtorepairingor
replacingproducts which Manufacturer’s investigation
shows were defective at the time of shipment. All
productssubjectto this warranty shallbereturnedfree
of any freight charges to Pratissoli Pompe division of
InterpumpGroupS.p.a.,viaFelice Cavallotti 33,
42100Reggio Emilia, Italy.
The express warranty set forth herein is in lieu of all
other warranties, express or implied, including without
limitation any warranties of merchantability of fitness
for a particular purpose and all such warranties are
herebydisclaimedand excluded by the Manufacturer.
Repairorreplacement ofdefectiveproductsasprovided
above is the sole and exclusive remedy provided
hereunder and the Manufacturer shall not be liable for
any further loss, damages or expenses, including
incidental or consequential damages, directly or
indirectly arising from the sale or use of this product.
For items not manufactured by Pratissoli Pompe, the
warranty terms applied will be those of the original
Manufacturer. Theuse of other thanPratissolioriginal
sparepartsautomaticallyvoids the warranty.

15
SH
17. SH EXPLODED VIEW AND PART LIST
SH

16
SH

17
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18. TROUBLE SHOOTING
THE PUMP DOES NOT PRODUCE ANY
NOISE: the pump is not primed and is
runningdry!
- no water in the inlet line.
- thevalvesareblocked.
- the pressure line is closed and does not
allow the air to get out of the fluid end.
THEPUMPKNOCKS:
- air suction.
- insufficientfeeding.
- bends,elbows and fittings alongthe
suction line throttle the amount of water
whichpassesthrough.
- too small inlet filter.
- dirty inlet filter.
- the feeding pump, where provided, is not
of the suitable type or provides insufficient
pressureorvolume.
- thepump is not primeddueto insufficient
feeding or the delivery line is closed during
start up.
- the pump is not primed because some
valvesarestuck(i.e.pumpinactivity for long
time).
- jammedorworn-outvalves.
- worn-outpressurepackings.
- thepressureregulatingvalvesdonotwork
properly.
- clearance in the drive system.
- r.p.m.are higher than rated.
.
THE PUMP DOES NOT DELIVER THE
RATEDVOLUME:
- insufficientfeeding(due tothecauselisted
above).
- r.p.m. are less than rated.
- excesive amount of water by-passed by
thepressureregulatingvalve.
- wornoutvalves.
- excessive leakage from pressure
packings.
INSUFFICIENTPUMPPRESSURE:
- the nozzle is (or has become) too large.
- r.p.m. are less than rated.
- excessive leakage from pressure
packings.
- excessive amount of water by-passed by
thepressureregulatingvalveorfaultyvalve
operation.
- wornoutvalves.
EXCESSIVE WATER LEAKAGE FROM
THEPUMP:
- pressure packings are excessively worn
out (due to normal wear or excessive
cavitation).
- wornoutplungers.
OVERHEATED PUMP:
- the direction of rotation is not correct.
- pumpisoverloaded(pressureorrpmover
theratedvalues).
- the oil level is too low or the oil is not of a
suitable type or fully used.
- water in the oil.
- excessive belt tension or incorrect
alignmentofthejoint(whereprovided).
- excessive inclination of the pump during
operation.
PIPEVIBRATIONSORKNOCKINGS:
- air suction.
- thepressureregulatingvalvedoesnotwork
properly.
- the by-pass line is undersized.
- jammedupvalves.
- drivetransmissionmotionis irregular.

ADivisionofthe INTERPUMP
GROUP S.p.A
Via F. Cavallotti, 33 - 42100 Reggio Emilia - Italy -Tel. [phone] - Fax [phone] - E-mail: [e-mail]