Milton Roy G Series Installation guide

DATE : 26 Juillet 2019 Rév 00
Réf. : 00
All rights reserved MILTON ROY EUROPE - Copyright COMPANY
MILTON ROY EUROPE / 10 Grande Rue - 27360 Pont-St-Pierre - FRANCE / Tel.: [phone] / [e-mail]
INSTRUCTION MANUAL
FOR INSTALLATION
OPERATING, AND
MAINTENANCE.
Dosing pump SERIE G ®
GM Liquid end DSD
The force in pump technology
This manual should be made available to the person responsible for installation, operating and
maintenance.
Translated version

CONTENTS
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. Setting up
II - 4. Electrical installation
III - START UP
III - 1. Procedures before start up
III - 2. Start up
III - 3. Failures on start up
IV - MAINTENANCE
IV - 1. General
IV - 2. Operation - Schedule of checks andmaintenance operations
IV - 3. Basic maintenance
V - PREVENTIVE MAINTENANCE - ANNUAL OVERHAUL
VI - CORRECTIVE MAINTENANCE
VII - SERVICING THE LIQUID END
VIII - SERVICING THE MECHANICAL ASSEMBLY
TECHNICAL CHARACTERISTICS
« EC » DECLARATION OF CONFORMITY
GUARANTEE
LIST OF « TECHNICAL ASSISTANCE » AND « SPARE PARTS » DEPARTMENTS

GM001GB
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 not sustained any
obvious damage. Precautions must be taken when
opening the packaging in order to avoid damaging
accessories which may be secured inside the packaging.
Examine the contents and check them off against the
delivery note.
STORAGE PRECAUTIONS
Storage for less than six months
Equipment shall preferably be stored in its original
packaging and protected from adverse weather
conditions.
Storage for more than six months
Store the pump in its original packaging. In
addition, packaging in heat-sealing plastic cover
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 protected from adverse weather
conditions.
Store protected from adverse weather
conditions.
I - 2. DESCRIPTION
The GM pump is a compact electromechanical metering
pump that is life-lubricated with oil in a sealed housing,
with capacity adjustment in operation or when stopped.
It is made up of the following components (Fig. 1.2a):
a drive device comprising a motor [1],
a mechanical assembly [2],
a liquid end [3].
Leak-tightness between the mechanical assembly and
the liquid end is ensured by means of a bellows.
Various components of the pump are shown in Figure
1.2a.
1Motor 6Liquid end mounting assembly
2Mechanical assembly 11 Valve assembly (suction)
3Liquid end 12 Valve assembly (discharge)
4Stroke adjustment knob
Fig. 1.2a: GM pump

GM001GB
I - 3. OPERATING PRINCIPLE OF THE PUMP
See Figures 1.3b and 1.3c
Fig. 1.3b : Setting to zero stroke
Suction phase
Discharge phase
Fig. 1.3c : Setting to ma
ximum stroke
1 Worm 7 Diaphragm
2 Tangential wheel 10 Stroke = two times the distance between (A) and (B)
3 Eccentric 11 Position at rear neutral point
4 Connecting rod 12 Position at forward neutral point
6 Crosshead
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 connecting rod [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 connecting rod
[B]. The stroke is adjusted by moving the crosshead [6]
by means of a stroke adjustment screw. The movement
of the crosshead causes movement of the male
eccentric piece which modifies the position of the
connecting rod axis.
When the connecting rod 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 the functional diagram at zero
stroke.
Figure 1.3c shows the functional diagram at maximum
stroke.
DIAPHRAM LIQUID END
In discharge phase the diaphragm [7] deformed it under
the pressure approve by hydraulic oil for moving an oil
volume defined
In suction phase the process is reversed due to the
diaphragm mechanical memory for sucking an oil
volume defined.
MECHANICALLY CONTROLLED DIAPHRAGM-
TYPE LIQUID END
The diaphragm [7] is mechanically linked to the
connecting rod [4] and has the same reciprocating
motion.
During the suction phase, the movement of the
diaphragm allows the suction of a given volume of fluid.
In the discharge phase, the process is reversed. The
diaphragm then expels the fluid.

GM002GB
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 determinethe 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 downstream of the
above-mentioned item
•For viscous products: consultus.
•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.
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)
located at the bottom of the liquid end mounting
assembly to collect leaks in the event of rupture of the
diaphragm or boot.
II -3. 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).
90mm

GM002GB
1Tank 8Injection nozzle
2Foot valve (equipped with a filter) 9Shutt-off valve
4Metering pump 10 Filter
6Utilization 11 Pulsation dampener
Provide for a safety valve on the discharge circuit in case of a stainless steel liquid end
Fig. 2.1a : Diagrams of typical installations

GM002GB
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
powersupply.
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
AB
C
Fig. 2.5d :
Single-phase connection
Tri
Mono

GM003GB
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 pipe fitting torque.
•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 (See Figure 2.5b or 2.5c).
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.
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. Installa back-pressure valve on
thedischarge 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.
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
Tri
Tri

GM004GB
PART IV - ROUTINE MAINTENANCE
IV-1. GENERAL
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
BEFORE SERVICING
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.
4. Drain the housing and leave it to drip for about
half an hour. Wear protective gloves to avoid
any risk of being burned by hot oil (not
necessary for chapter V and V-1)
RESTARTING
1. Refill the housing (see Chapter
LUBRICATION), with the pump being laid onto
the opposite side of liquid end. Remove any
overflow oil immediately with a degreasing
agent
2. Connect up the pump hydraulically.
3. Check that the capacity is set to « 0% ».
4. Check that there are no suspicious noises
when starting up.
5. Set the pump capacity to « 100 % » to obtain
quicker priming.
6. After priming, set the pump to the desired
capacity and lock the stroke adjustment
knob
IV-2. 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 3 months Check by listening (no
knocking)
- if unsatisfactory -> Chapter IV-3
Every 6 months (or 1,500 hours) Cleaning of foot valve and
valve assemblies Chapter IV-3
Frequency to be defined
according to process (approx.
1,000 hours)
Check on compliance of
flow rate Chapter IV-3
Every year (or 3,000 hours) THE FOOT VALVE
Balls and seats kits or sets of
cartridges depending on model),
Chapter IV-3
Every year (or 3,000 hours) VALVE ASSEMBLIES
Balls and seats kits or sets of
cartridges (depending on
model),
Chapter V
Every 2 years (or 6000 hours) Remplacing the secondary
diaphragm Chapter V-2
A model maintenance sheet is shown in Figure 3.4a to help you ensure follow-up of your servicing actions (checking or
maintenance).

GM004GB
MAINTENANCE SHEET
Pump code : S/N. :
Liquid pumped :
Date of commissioning :
Service Operation Date Hours Remarks
Fig. 3.4a : Model Maintenance Sheet

GM004GB
IV-3. ROUTINE MAINTENANCE
CHECKING THE PUMP CAPACITY
This is a question of determining the curve representing the
pump’s capacity according to its setting. This curve depend
of the liquid pumped
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.
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 - 2.)
The pump is used in conditions it was not designed
for.
PROBLEMS WITH NOISY MECHANICAL PARTS
The tangential wheel is faulty. Replace the
« wheel » (see Part VI-2).
A bearing is faulty. Provide for the replacement of
either the « whole A » or the ball bearing assembly
[404] (see Part VI-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 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 »] (see Part VI).
A bearing is faulty. Provide for the replacement of
either the « wheel - connecting rod » or the ball
beraing [404)(see Part VI).
The leak-tightness of the suction circuit is
unsatisfactory: repair or replace the piping.
ORDERING SPARE PARTS
A complete spare parts list is given at the end of this
manual for the mechanical assembly.
A complete spare parts list is joined t o this manual for the
liquid end assembly
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
MILTONROY. 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.
You will find the phone and fax number of the Spare Parts
Department at the end of this documentation.
1
Model : Pump code*
4 Pmax : Maximum pressure
2
SERIAL : D.M.R. internal No.
5 Date : Date of manufacture
3 Qmax : Maximum capacity
Fig. 4.5a : Identification plate

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 Process: valve Mounting/Disassembly
SERVICING THE VALVE ASSEMBLIES
See Process: liquid end Mounting/Disassembly

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)
Mechanical assembly (without cover or base, with bellows and lubricating oil)
« Wheel - connecting rod » assembly
« Male eccentric » assembly
Lubricating oil

VI Assembly / Disassembly of the adjusting knob
Drawing 1066105100D05 rev00 GM006GB
Disassembly Assembly
Position Torque value
[700A] Mechanical stop
1. Remove the part [053]
2. Unscrew the screw [700A]
3. Remove the part [700B]
1. Turn the part [056] in the negative direction until
mechanical stop
2. Turn the part [056] of ½ turn in the positive direction
3. Set the part [700B] to « 0% »
4. Screw the screws [700A] (in the more close tapped
holes)
5. Glue the part [053]

VI-1 Assembly / Disassembly of the motor
Drawing 1066105100D06 rev00 GM006-1GB
Disassembly Assembly
Position Torque value
[435] Mechanical stop
1. Unscrew the screws [435]
2. Remove the motor [028]
3. Remove the part [438]
1. Fit the parts [438],[081]
2. Fit the motor [028]
3. Screw the screws [435]

VI-2 Assembly / Disassembly of the mechanical assembly
Drawing 1066105100D03 rev00 GM006-2GB
Disassembly Assembly
Position Torque value
[435A] Mechanical stop
1. Unscrew the screws [435A]
2. Remove the whole from the housing
3. Unscrew the screw [056A]
4. Unscrew the part [A] (left-hand)
5. Remove the parts [052A],[037],[700],[037A]
6. Remove if necessary the bearing [404]
1. Fit the parts [072],[438B],[438A]
2. Oil the thread of the whole [A]
3. Screw the whole [A] on the part [072] (left-hand)
4. Fit the parts [437],[072]
5. Screw the screw [056A]
6. Fit the parts [037A],[700]
7. Fit the parts [404],[081] (with a press)
8. Fit the parts [700],[A]
9. Fit the parts [700],[037],[052A]
10. Introduce the whole into the housing
11. Screw the screws [435A]