Dosapro Milton Roy G Series User manual

INSTRUCTION MANUAL
FOR INSTALLATION,
OPERATING,
AND MAINTENANCE.
Pump
SERIES G™ MODEL A
This manual should be made available to the person responsible for installation,
operating and maintenance.
Date : 11/99 O / Ref : 160.0707.001. Rev. B

CONTENTS
HOW TO USE THIS MANUAL ?
I – DESCRIPTION
I - 1. Unpacking and storage
I - 2. Description
I - 3. Operating principle of the pump
I - 4. Accessories
I - 5. Safety and health instructions
II – INSTALLATION
II - 1. Hydraulic installation
II - 2. Drip collection
II - 3. Handling
II - 4. Setting up
II - 5. Electrical installation
III - START UP
III - 1. Procedures before start up
III - 2. Start up
III - 3. Failures on start up
III - 4. Operation - Schedule of checks and maintenance operations
IV - ROUTINE MAINTENANCE
IV - 1. Occurrence of a leak from detection port
IV - 2. Cleaning the foot valve and valve assemblies
IV - 3. Checking the pump capacity
IV - 4. Tracing causes of failure
IV - 5. Ordering spare parts
V - PREVENTIVE MAINTENANCE - ANNUAL OVERHAUL
V - 1. Spare parts required for annual overhaul
V - 2. Sequential actions
VI - CORRECTIVE MAINTENANCE
VI - 1. List of other spare parts
VI - 2 Sequential actions
VII - SERVICING THE LIQUID END AND THE LIQUID END MOUNTING ASSEMBLY
VII - 1. General
VII - 2. Removing, reinstalling the check valve
VII - 3. Reinstalling, reinstalling the liquid end assembly
VII - 4. Reinstalling, reinstalling the liquid end assembly (double diaphragm)

VIII - SERVICING THE MECHANICAL ASSEMBLY
VIII - 1 Dismantling, Reinstalling themechanical assembly
TECHNICAL CHARACTERISTICS
«EC» DECLARATION OF CONFORMITY
GUARANTEE
LIST OF «TECHNICAL ASSISTANCE » AND « SPARE PARTS » DEPARTMENTS

G, A, 51/61, L001,Rév. E, 0998
HOW TO USE THIS MANUAL ?
IMPORTANT: You shouldread thefollowingparagraphscarefully inorder tounderstand how to usethis manual
efficiently.
This manual corresponds to the type ofpumps
mentioned on thecover page.
There maybe severaldifferent construction versions for
each type ofpump, however,andthis manualtakes
thosedifferencesinto account.
The paragraphs orlines specific to agiven construction
are:
•indentedcompared to the maintext body,
•marked by a vertical lineindicating thespecific
text,
•marked by a rectanglespecifying the
corresponding code.
Note: When first readingthis document,you are
advised tohighlight the «boxes» corresponding to the
construction ofyourequipmentso themanualwill be
easier toread in future.
MARKING USED IN THE MANUAL
You will find thelist of thevariouspossibilitiesand the
correspondingmarkings,at the end of the illustrations
manual.
In addition, toidentify the type of construction ofyour
pump, the tableincludes thepump codeshown on the
identification plateattached to thepump (Fig. 4.5a).
Caution :onlycharactersmentioned are tobetaken
intoaccountwhenreadingthis manual.
Examples of pump code :
Pump flow rateîíLiquid en matrial
GA 5P1M 3çPower type
Mark Description
PLiquid end PP
DLiquid end PVDF
SLiquid end,stainlesssteel
VHigh-viscosity version
4FV* 4-function valve
33-phase powersupply
2Single-phase powersupply
ADébit ≤45 l/h
BDébit >45 l/h
* Available as option forpumps equippedwith plasticliquid ends.22l/h.
Nota
•For thesake ofsimplicity, theproceduresdescribed do not mention thewashersfitted with fasteners (such as
screws and nuts). Do notforget toreinstallwashersafter removingthem.
•Verify that parts areundamagedbeforereinstalling.

I - 1
PART I - DESCRIPTION
I - 1. UNPACKING AND STORAGE
UNPACKING
The packaging must be carefully examined on receipt in
order to ensure that the contents have notsustained
any obvious damage. Precautions must be taken when
opening the packaging inorder to avoid damaging
accessorieswhich may be securedinside the
packaging. Examine the contentsand checkthem off
against the delivery note.
STORAGE PRECAUTIONS
Storage for less than six months
Equipment shall preferably be stored in its original
packaging and protectedfrom adverse weather
conditions.
Storage for more than six months
•Store the pump in its original packaging. In
addition, packaging in heat-sealing plasticcover
and dessicant bags must be provided for. The
quantity of dessicant bags should be adapted to
the storage period and to the packaging volume.
•Store protectedfrom adverse weather
conditions.
I - 2. DESCRIPTION
The « SERIES G » Model A pump is a compact
electromechanicalmetering pump that is life-lubricated
with oil in a sealedhousing, with capacity adjustment in
operation or when stopped.
It is made up of the following components (Fig. 1.2a):
1Motor 8Stroke locking device
2Mechanical assembly 9Leak detection port
3Liquid end 10 4-function valve *
4Stroke adjustment knob 11 Valve assembly (suction)
5Control unit (frequency control) 12 Valve assembly (discharge)
6Liquid endmounting assembly
* Accessorysupplied as optional equipment with pumps equipped with plastic liquid end.
Fig. 1.2a: Model A, series G pump

I - 2
•
•a drive device comprising a motor [1],
•a mechanical assembly [2],
•a liquid end [3].
Leak-tightnessbetween themechanical assembly and
the liquid end is ensured bymeans of a bellows.
Capacity adjustment is controlled either manually (by a
stroke adjustment knob [4]) or automatically by a control
box [5] (such as in the case of a G PULSE version
single-phasemotor).
Various components of thepump are shown in Figure
1.2a.
Note: For further information on the automatic control
system, see the relevantspecific manual.
I - 3. OPERATING PRINCIPLE OF THE
PUMP
See Figures 1.3band 1.3c.
Fig. 1.3b : Setting to zero stroke
Suction phase Discharge phase
Fig. 1.3c : Setting to maximum stroke
1Worm 7Diaphragm
2Tangential wheel 10 Stroke = two times the distance between (A)and (B)
3Eccentric 11 Position at rear neutral point
4Connecting rod 12 Position at forward neutral point
6Crosshead

I - 3
MECHANICAL ASSEMBLY
The mechanical assembly works on the principle of a
variable eccentric.
The rotational motion of the motor is transmitted by the
worm [1] to the tangential gear [2] which is linked to an
eccentric system [3].
The connectingrod [4], attached to this eccentric
system, converts the rotary motion into a reciprocating
linear motion with variable stroke. The stroke depends
upon the eccentricity between the axis of rotation of the
tangential wheel [A] and an axis of the connectingrod
[B]. The stroke is adjusted by moving the crosshead [6]
by means of a stroke adjustment screw. Themovement
of the crosshead causesmovement of the male
eccentric piece which modifies the position of the
connectingrod axis.
When the connectingrod axis [B] is aligned with the
axis of the tangential wheel [A], the connecting rod does
not move and the stroke is zero.
Figure 1.3b shows thefunctional diagram at zero
stroke.
Figure 1.3c shows thefunctional diagram at maximum
stroke.
MECHANICALLY CONTROLLED DIAPHRAGM-
TYPE LIQUID END
The diaphragm [7] is mechanically linked to the
connectingrod [4] and has the same reciprocating
motion.
During the suction phase, themovement of the
diaphragm allows the suction of a given volume of fluid.
In the discharge phase, theprocess is reversed. The
diaphragm then expels thefluid.
I - 4. ACCESSORIES
See Figure 1.4a.
Certain accessories aresupplied as standard
equipment or as options, as applicable.
•A foot valve [A] (equippedwith a filter). This
avoids unpriming of the pump as well as
allowing filtering of the fluid.
•A 4-function valve [B] : anti-syphon, back
pressure,manual pressure reliefand priming aid
valve. See thespecific documentation if your
pump is equippedwith this accessory.
•An injection nozzle [C]. This allows the pumped
fluid to be isolated from the main flow.
AFoot valve 6Valve body seat
B4-function valve 14 Valve housing
CInjection nozzle 15 Valve seat
2Valve housing 16 Filter
4Ball 35 Kit for injection check valve
5Ball seat
Fig. 1.4a : Accessories

I - 4
1 - 5. SAFETY AND HEALTH
INSTRUCTIONS
The personnelresponsible for installing, operating and
maintaining this equipment must become acquainted
with, assimilate and comply with the contents of this
manual in order to:
•avoid any possible risk to themselves or to third
parties,
•ensure thereliability of the equipment,
•avoid any error or pollution due to incorrect
operation.
Any servicing on this equipment must be carried out
when it is stopped. Any accidental start-up must be
prevented (either by locking the switch or removing the
fuse on the powersupply line).
A notice must be attached to the location of theswitch
to warn that servicing is being carried out on the
equipment.
Switch off the power supply as soon as any fault is
detectedduring operation: abnormal heating or unusual
noise.
Special care has tobe taken for chemicals used in the
process (acids, bases, oxiding/reducing solutions, ...).

II - 1
PART II - INSTALLATION
II - 1. HYDRAULIC INSTALLATION
All the information concerning the hydraulic installation
of a metering pump is detailed in a volume,
«Generalities about metering pumps installation». You
should consult that manual to determine the installation
required for your application.
Certain essential points are, however, also briefly
covered in this document.
GENERAL
•Piping layout
There must be no swan-necks or stagnant volumes
which are liable to trap air or gas.
Stresses due to incorrect alignment of piping with
respect to the centreline of valves must be avoided as
far as possible.
•Remove burrs and clean the piping before fitting.
•It is advisable to provide for a calibrating chamber in
order to calibrate the pump in service conditions.
PIPING ON THE SUCTION CIRCUIT
•If your pump is flooded, a shutt-off valve will be
required
•If your pump is not flooded (suction lift), install the
foot valve equiped with the filter upstream of the
above-mentioned item
•For viscous products: consult us.
•Check whether the diameter and length of pipe are
compatible with the pump's maximum capacity.
•Install the pump as near as possible to the suction
tank.
PIPING ON THE DISCHARGE CIRCUIT
•Provide for a safety valve on the discharge pipe,
designed to protect the installation.
•It is advisable to install a priming valve on the
discharge circuit in order to make starting and
maintenance of the pump easier.
Note: The priming valve and the safety valve have no
purpose if your pump is equipped with a 4-function
valve.
Typical installations are shown schematically in Figure
2.1a.
II - 2. DRIP COLLECTION
Provide for outlets so that any leak or drips can be
easily drained off without any danger. This is especially
important in the case of harmful liquids.
See Figure 1.2a.
Position a tray under the plain hole (detection port [9])
located at the bottom of the liquid end mounting
assembly to collect leaks in the event of rupture of the
diaphragm or boot.
Connect the 4-function valve [10] to the top
of the reservoir (see the specific
documentation), ensuring that tube is not
submerged.
II - 3. HANDLING
The « SERIES G » Model A pump requires no special
precautions owing to its light weight.
Proceed with mounting as soon as it is set up on site
(see Chapter II - 4. Setting up).
II - 4. SETTING UP
Secure the pump to a horizontal support (see attaching
holes). Leave enough clear space around the pump to
be able to carry out servicing operations and
adjustments.
Pumps installed outdoors must be protected by a
shelter (according to the climatic conditions).
4FV

II - 2
1Tank 8Injection nozzle
2Foot valve (equipped with a filter) 9Shutt-off valve
4Metering pump 10 Filter
6Utilization 11 Pulsation dampener
74-function valve*
* In case of plastic liquid end only
Provide for a safety valve on the discharge circuit in case of a stainless steel liquid end
Fig. 2.1a : Diagrams of typical installations

II - 3
II - 5. ELECTRICAL INSTALLATION
CONNECTING THE MOTOR
Check the specifications of the motor and compare
them with the voltage available on your installation
before making connections. Connect up the motor in
accordance with the instructions in the terminal box
(Fig. 2.5a).
A delta connection is required to connect up
to a 230 V 3-phase power supply (Fig. 2.5b).
A star connection is required to connect up to
a 400 V 3-phase power supply (Fig. 2.5c).
For connection in SINGLE-PHASE mode,
see Figure 2.5d.
Replace the existing wires with those of your electrical
power supply.
CAUTION : Do not forget to connect the earth terminal
on the motor [PE] (Fig. 2.5a) to the equipment earth
conductor.
The electrical protection installed for the motor (fuse or
thermal protection) must be suitable for the motor's
rated current.
Fig. 2.5a : Motor terminal box
Fig. 2.5b :
230 V delta connection Fig. 2.5c :
400 V star connection Fig. 2.5d :
Single-phase connection
Tri
Mono

III - 1
PART III - START UP
III - 1. PROCEDURES BEFORE START
UP
Special care has to be taken for chemicals used in the
process (acids, bases, oxiding/reducing solutions, ...).
See Figure 1.2a.
•Check that the pump is secured to its support
(Chapter II - 4. Setting up).
•Check the opening of all the isolating valves
installed on the suction and discharge circuits. If
your pump is equipped with a 4-function valve, see
the relevant specific documentation. If the discharge
circuit is equipped with an injection nozzle or a
back-pressure valve, open the priming valve on the
discharge side (if there is no priming valve,
disconnect the piping on the discharge side). This
allows you to check for the presence of liquid if the
pump is installed in flooded suction or to prime the
pump if it is installed in suction lift.
•Set the pump capacity adjustment to 0% (stroke
adjustment knob [4]).
Checking the electrical connection of the
motor
Start up the pump to check the motor's direction of
rotation. It must comply with that indicated by the arrow
marked on the pump cover.
To reverse the motor's direction of rotation,
invert A and B or A and C (See Figure 2.5b
or 2.5c). Stop the pump.
III - 2. START UP
•Once all the checks and procedures described in
the previous section have been carried out, start up
the pump.
•Check visually and by listening. (In particular, check
that there are no suspicious noises).
•Make sure that the stroke adjustment knob is
unlocked.
•Adjust the pump capacity gradually from 0 % to 100
% and control
- either the liquid output at priming valve,
- either the noise of the liquid when it goes
through the discharge check valve (if your
installation is not equipped withe a
priming valve).
Priming has been achieved if one of the two conditions
is carried out. Close the priming valve.
•Set the pump to the desired capacity. Lock the
stroke adjustment knob with the stroke locking
device [8] (Fig. 1.2a).
III - 3. FAILURES ON START UP
PROBLEMS WITH MOTOR
The motor runs with difficulty and heats up.
•The characteristics of the electrical power supply do
not match the specifications of the motor.
•One phase is incorrectly connected.
•The electrical connection used is not
suitable.
•Check that the pressure on the discharge side is
compatible with the equipment’s capabilities.
•Too many flow pulsations : a pulsation dampener is
required, or the pulsation dampener installed is of
the wrong size, or the pressurization of the pulsation
dampener is incorrect.
•The direction of rotation of the motor is
incorrect. (Check using the arrow marked
on the cover). Reverse the direction of
rotation (see Chapter III - 1. Procedures
before start up, Checking the electrical
connection of motor).
PROBLEMS WITH FLOW RATE
The flow rate is lower than desired
•The pump capacity is incorrectly adjusted: adjust
the capacity to the desired value and lock the stroke
adjustment knob.
•The suction power is insufficient. (Piping cross-
section too small or piping too long): replace the
pipes with ones with a larger cross-section or install
the pump in flooded suction.
•The leak-tightness of the suction pipes is
unsatisfactory.
•The viscosity of the liquid is incompatible with the
capabilities offered by your pump version.
The capacity is greater than desired
•The pump capacity is incorrectly adjusted: adjust
the capacity to the desired value and lock the stroke
adjustment knob.
•A syphoning phenomenon is observed: check that
the suction pressure is not greater than the
discharge pressure. Install a 4FV or a back-
pressure valve on the discharge side.
•Too many flow pulsations : a pulsation dampener is
required, or the pulsation dampener installed is of
the wrong size, or the pressurization of the pulsation
dampener is incorrect.
Tri
Tri
Tri

III - 2
The capacity is variable
•This problem may be due to particles from the
piping which interfere with the operation of the valve
assemblies: clean the piping and the valve
assemblies.
III - 4. OPERATION - SCHEDULE FOR
CHECKS AND MAINTENANCE
OPERATIONS
The programme of checks and maintenance operations
depends on the conditions in which the equipment is
used. For this reason, the following frequencies are
given as an example only. Individual users should
adapt these frequencies to their own specific operating
conditions.
When Check Servicing See
Every month Check for the occurrence of a
leak from the detection port
- if leak occurs -> Chapter IV -1
Every 3 months Check by listening (no knocking)
- if unsatisfactory -> Chapter IV-4
Every 6 months (or
1,500 hours) Cleaning of foot valve and valve assemblies Chapter IV-2
Frequency to be
defined according to
process (approx.
1,000 hours)
Check on compliance of flow rate Check on pump capacity Chapter IV-3
Every year (or 3,000
hours) Annual overhaul Part V
A model maintenance sheet is shown in Figure 3.4a to help you ensure follow-up of your servicing actions (checking or
maintenance).

III - 3
MAINTENANCE SHEET
Pump code : D.M.R. internal no. :
Liquid pumped :
Date of commissioning :
Service Operation Date Hours Remarks
Fig. 3.4a : Model Maintenance Sheet

IV - 1
PART IV - ROUTINE MAINTENANCE
IV - 1. OCCURRENCE OF A LEAK
FROM DETECTION PORT
Determine whether the product collected at the
detection port [9] (Fig. 1.2a) is lubricating oil or the
pumped fluid.
•If the product is pumped fluid, the diaphragm is
faulty. Proceed with its replacement (see Part
V).
•If the product is lubricating oil, the secondary
diaphragm is faulty. Proceed with its
replacement (see Part V).
IV - 2. CLEANING THE FOOT VALVE
AND VALVE ASSEMBLIES
Carry out the procedures in the specified order having
read the general information (in Chapter VII - 1).
CLEANING THE FOOT VALVE
See figure 1.5a.
•Preliminary operations: Part VII - Section A1 -
paragraphs 1 and 2.
•Disconnect the suction circuit from the pump.
•Remove the foot valve [A].
•Unscrew the filter [16] and the valve seat [15] to
remove the ball seat [5] (mark the direction of
fitting) and the ball [4].
•Proceed with the cleaning of the various items.
In the case of wear, proceed with the
replacement of the «seat - ball » assembly or
the foot valve.
•Screw the filter [16] onto the valve seat [15].
•Insert a ball seat [5] (taking care to comply with
the fitting directions) and a ball [4] in the valve
support.
•Screw the valve support onto the body of the
valve housing [14].
•Connect up the pump suction circuit.
•Restarting: Part VII - Section A2 - paragraphs 2
to 4.
CLEANING THE VALVE ASSEMBLIES
•Preliminary operations: Part VII - Section A1
•Removing the valve assemblies: Part VII -
Section B1
•Reinstalling the valve assemblies: Part VII -
Section B2
•Restarting: Part VII - Section A2
CLEANING THE INJECTION NOZZLE
See Figure 1.5a.
•Preliminary operations: Part VII - Section A1 -
paragraphs 1 and 2
•Remove the injection nozzle [C].
•Unscrew the valve body seat [6] to remove the
ball seat [5] (mark the direction of fitting), the ball
[4] and the spring [3] (see note below).
•Proceed with the cleaning of the various items.
In case of wear, proceed with the replacement of
the « seat - ball » assembly or of the injection
nozzle.
•Insert a ball seat [5] (taking care to comply with
the fitting direction), a ball [4] and a spring [3]
(see note below) in the valve body seat [6].
•Screw the valve assembly body into the valve
housing [2].
•Install the injection nozzle.
•Restarting: Part VII - Section A2 - paragraphs 2
to 4.
Note : Consult the relevant liquid end sheet : some
injection nozzles are not supplied with spring.
IV - 3. CHECKING THE PUMP
CAPACITY
This is a question of determining the curve representing
the pump’s capacity according to its setting.
Four measurements are sufficient (adjustment to 100
%,75 %, 50 % and 25 %).
Place the foot valve in a calibrating chamber (graduated
reservoir). Measure the volume of pumped liquid for a
given period of time at the various settings.
Plot the curve and use it to determine the adjustment
corresponding to the desired capacity.
IV - 4. TRACING CAUSES OF FAILURE
PROBLEMS WITH MOTOR
The motor does not run
The thermal relay has been tripped.
•The motor is defective.
•Wiring is defective.
•Check the parts of the mechanical assembly.
The motor heats up abnormally
•The quantity of lubricating oil is incorrect: trace the
leak (see Chapter IV - 1.)
•The pump is used in conditions it was not designed
for.
PROBLEMS WITH NOISY MECHANICAL
PARTS
•The tangential wheel is faulty. Replace the «wheel -
connecting rod» assembly [D] (see Part VI).
•A bearing is faulty. Provide for the replacement of
either the «wheel - connecting rod» assembly [D],
the « male eccentric » assembly [12] or the whole
mechanical assembly [J] (see Part VI).

IV - 2
PROBLEMS WITH FLOW RATE
The pump produces no flow
•The pump capacity is adjusted to « 0 % » : Adjust
the capacity to the desired value and lock the stroke
adjustment knob.
•The liquid end is unprimed: release the pressure on
the discharge pipe and prime the liquid end, or
check the leak-tightness of the suction circuit.
•The balls of the valve assemblies are blocked by
particles: clean or replace the valve assemblies.
First, check whether the presence of these particles
is normal and take corrective action if necessary.
•The diaphragm is faulty (rupture): see Chapter IV -
1. And replace the diaphragm (see Part V).
The pump does not provide the required flow
rate
•The pump capacity is incorrectly adjusted: adjust the
capacity to the desired value and lock the stroke
adjustment knob.
•The 4-function valve continuously
releases pressure: the discharge piping is
partially or totally blocked.
•The ball seats and/or the balls are dirty or worn:
clean or replace the ball seats and the balls or the
valve assemblies.
•The tangential wheel is faulty. Replace the «wheel -
connecting rod» assembly [D] (see Part VI).
•A bearing is faulty. Provide for the replacement of
either the «wheel - connecting rod» assembly [D],
the « male eccentric » assembly [12] or the whole
mechanical assembly [J] (see Part VI).
•The leak-tightness of the suction circuit is
unsatisfactory: repair or replace the piping.
IV - 5. ORDERING SPARE PARTS
To make it easier to register your order for spare parts
and ensure quicker delivery, please provide us with the
following details:
•information on the pump: Codel [1] and D.M.R.
internal no. [2]. These two items of information are
shown on the identification plate mounted on the
pump (see Fig. 4.5a).
•Information on the spare part: reference, description
and quantity. These items of information are
specified in the relevant sheets supplied with the
pump.
You will find the phone and fax number of the Spare
Parts Department at the end of this documentation.
1Model : Pump code 4Pmax : Maximum pressure
2SERIAL : D.M.R. internal No. 5Date : Date of manufacture
3Qmax : Maximum capacity
Fig. 4.5a : Identification plate
4FV

V - 1
PART V - PREVENTIVE MAINTENANCE
ANNUAL OVERHAUL
V - 1. SPARE PARTS REQUIRED FOR
ANNUAL OVERHAUL
Annual overhaul (after one year or 3,000 hours’
operation) involves the replacement of the following
wear parts:
•Balls and seats kits or sets of cartridges
(depending on model),
•Diaphragm,
Every two years (or 6,000 hours’ operation), during the
annual overhaul, replace also :
•Secondary diaphragm,
The servicing action required for the replacement of
balls and seats kits, diaphragm and secondary
diaphragm are described in Part VII: Servicing the liquid
end and the liquid end mounting assembly. The
procedures must be carried out in the specified order.
Chapter V - 2. Sequential actions allow partial servicing
operations to be carried out.
Note : For full list of spare parts refer to the relevant
liquid end sheet and mechanical assembly sheet.
V - 2. SEQUENTIAL ACTIONS
Carry out the procedures in the specified order having
read the general information (in Chapter VII - 1).
SERVICING THE FOOT VALVE
See Chapter IV - 2, paragraph on cleaning the foot
valve.
SERVICING THE VALVE ASSEMBLIES
•Preliminary operations: Part VII - Section A1
•Removing the valve assemblies: Part VII -
Section B1
•Reinstalling the valve assemblies: Part VII -
Section B2
•Restarting: Part VII - Section A2
REPLACING THE DIAPHRAGM
•Preliminary operations: Part VII - Section A1
•Removing the diaphragm: Part VII - Section C1
•Reinstalling the diaphragm: Part VII - Section C2
•Restarting: Part VII - Section A2
REPLACING THE SECONDARY DIAPHRAGM
•Preliminary operations: Part VII - Section A1
•Removing the diaphragm: Part VII - Section C1
•Removing the secondary diaphragm: Part VII -
Section D1
•Reinstalling the secondary diaphragm: Part VII -
Section D2
•Reinstalling the diaphragm: Part VII - Section C2
•Restarting: Part VII - Section A2

VI - 1
PART VI - CORRECTIVE MAINTENANCE
VI - 1. LIST OF OTHER SPARE PARTS
This completes the list given in Chapter V - 1 which
covers the set of spare parts required for annual
overhaul of the pump.
•Motor (with worm) [22]
•Mechanical assembly (without cover or base,
with bellows and lubricating oil) [J]
•«Wheel - connecting rod» assembly [D]
•«Male eccentric» assembly [12]
•Lubricating oil
Note : For full list of spare parts refer to the relevant
liquid end sheet and mechanical assembly sheet.
VI - 2. SEQUENTIAL ACTIONS
Carry out the procedures in the specified order after
reading the general information (in Chapters VII - 1 and
VIII - 1).
REPLACING THE MOTOR
•Preliminary operations: Part VII - Section A1 -
Paragraphs 1 and 2
•Removing the motor: Part VIII - Section M1
•Reinstalling the motor: Part VIII - Section M2
•Restarting: Part VII - Section A2 - Paragraphs 2
and 3
REPLACING THE MECHANICAL ASSEMBLY
•Preliminary operations: Part VII - Section A1
•Removing the diaphragm: Part VII - Section C1
•Removing the secondary diaphragm: Part VII -
Section D1
•Removing the motor: Part VIII - Section M1
•Removing the base: Part VIII - Section P1
•Reinstalling the base: Part VIII - Section P2
•Reinstalling the motor: Part VIII - Section M2
•Reinstalling the secondary diaphragm: Part VII -
Section D2
•Reinstalling the diaphragm: Part VII - Section C2
•Restarting: Part VII - Section A2
REPLACING THE « MALE ECCENTRIC »
ASSEMBLY
•Preliminary operations: Part VII - Section A1
•Removing the diaphragm: Part VII - Section C1
•Removing the secondary diaphragm: Part VII -
Section D1
•Removing the motor: Part VIII - Section M1
•Removing the « male eccentric » assembly: Part
VIII - Section N1
•Reinstalling the « eccentric» assembly: Part VIII
- Section N2
•Reinstalling the stroke adjustment knob: Part VIII
- Section Q2
•Reinstalling the motor: Part VIII - Section M2
•Reinstalling the secondary diaphragm: Part VII -
Section D2
•Reinstalling the diaphragm: Part VII - Section C2
•Restarting: Part VII - Section A2
Note: It is advisable to replace the secondary
diaphragm.
REPLACING THE « WHEEL - CONNECTING
ROD » ASSEMBLY
•Preliminary operations: Part VII - Section A1
•Removing the diaphragm: Part VII - Section C1
•Removing the secondary diaphragm: Part VII -
Section D1
•Removing the motor: Part VIII - Section M1
•Removing the « male eccentric » assembly: Part
VIII - Section N1
•Removing the « wheel - connecting rod»
assembly: Part VIII - Section O1
•Reinstalling the «wheel - connecting rod»
assembly: Part VIII - Section O2
•Reinstalling the «male eccentric » assembly:
Part VIII - Section N2
•Reinstalling the stroke adjustment knob: Part VIII
- Section Q2
•Reinstalling the motor: Part VIII - Section M2
•Reinstalling the secondary diaphragm: Part VII -
Section D2
•Reinstalling the diaphragm: Part VII - Section C2
•Restarting: Part VII - Section A2
Note: It is advisable to replace the secondary
diaphragm.

VII - 1
PART VII - SERVICING THE LIQUID END AND THE LIQUID END
MOUNTING ASSEMBLY
Carry out the procedures described below:
•in the order of the text in the case of annual
overhaul (or 3,000 hours’ operation), except for
the secondary diaphragm which has to be
removed every two years (or 6,000 hours ’
operation).
•in the order specified in the section dealing with
the partial servicing envisaged (Chapter V - 2.
Sequential actions).
VII - 1. GENERAL
Note
•For the sake of simplicity, the procedures
described do not mention the washers fitted with
fasteners (such as screws and nuts). Do not
forget to reinstall washers after removing them.
•Verify that parts are undamaged before
reinstalling.
•Clean the recess for O-rings when they are
removed. Apply tallow in the recess before
reinstalling the new O-ring.
Special care has to be taken for chemicals used in the
process (acids, bases, oxiding/reducing solutions, ...).
VII - 2. REMOVING REINSTALLING THE
LIQUID END AND THE LIQUID END
MOUNTING ASSEMBLY
A1. Preliminary operations
Before carrying out any servicing action on the liquid
end or tubes, take the necessary steps to ensure that
any harmful liquid they may contain is not spilt and does
not touch personnel. Provide for the rinsing of the liquid
end, if necessary, and provide for appropriate protective
equipment. Check that there is no pressure and the
temperature of components before starting to
dismantle.
1. Position the pump capacity adjustment on "0%".
2. Disconnect the pump electrically. Check that the
equipment cannot be started up accidentally.
Place a notice at the location of the switch.
3. Disconnect the pump hydraulically.
B1. Removing the valve assemblies
See Figure 7.2a.
1. Unscrew the valve assembly body [6] (or
the 4-function valve body). Remove the
cartridge [c] (and mark the direction of
fitting) and the washer [e].
2. Clean the tapped holes in the liquid end
[10].
3. Clean the valve assembly bodies if they
are not to be replaced.
Discharge Suction
6Valve assembly body
10 Liquid end
cCartridge
eWasher
Fig. 7.2a : Sectional drawing of valve assy
B1. Removing the valve assemblies
See Figure 7.2b.
For each valve assembly:
1. Unscrew the union [1].
2. Unscrew the valve assembly body [6].
3. Remove the O-rings [2], the ball stop [3]
and the balls [4] and [5].
4. Clean the body, seat and ball assemblies.
In case of wear, proceed with the
replacement of the « seat - ball »
assemblies or the valve assemblies.
5. Clean the tapped holes in the liquid end
[10].
Discharge Suction
1Union
2O-ring
3Ball stop
4Ball
5Ball
6Valve assembly body
10 Liquid end
Fig. 7.2b : Sectional drawing of valve assy
S
≤
45l/h
P-D
≤
45l/h
P-D
S