Dover PSG Mouvex AF HT Owner's manual

AF HT PUMP
Construction O
INSTALLATION
OPERATION
MAINTENANCE
INSTRUCTIONS 1003-D00 e
Section 1003
Effective September 2012
Replaces September 2011
Original instructions
Your distributor :
Z.I. La Plaine des Isles - F 89000 AUXERRE - FRANCE
Tel. : [phone] - Fax : [phone]
[email protected] - www.mouvex.com

2/18NT 1003-D00 09.12 AF HT e
This is a SAFETY ALERT SYMBOL
When you see this symbol on the product, or in the manual, look
for one of the following signal words and be alert to the potential for
personal injury, death or major property damage.
Warns of hazards that WILL cause serious personal injury,
death or major property damage
Warns of hazards that CAN cause serious personal injury,
death or major property damage.
Warns of hazards that CAN cause personal injury or property
damage.
NOTICE
Indicates special instructions which are very important and
must be followed.
SAFETY INFORMATIONS
WARNING
CAUTION
DANGER
ECCENTRIC PISTON PUMP
MOUVEX PRINCIPLE
SAFETY, STORAGE, INSTALLATION AND MAINTENANCE INSTRUCTIONS
MODEL : AF HT
TECHNICAL CHARACTERISTICS
• Construction : Cast iron and steel
• Maximum suction pressure : less than 1 barg
• Acceptable maximal differential pressure : 5 bar
• Maximum pump speed : 625 rpm
• Maximum operating temperature :
* 250°C with FKM HT seals
• Cylinder capacity : 0,164 litre
TABLE OF CONTENTS Page
1. OVERALL DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . .3
2. INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2.1 Choice of pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2.2 Piping diameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2.3 Piping assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2.4 Direction of rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2.5 Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2.6 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2.7 Anchoring the pump units . . . . . . . . . . . . . . . . . . . . . . .5
2.8 Alignment of motor / pump and reduction gearbox /
pump shafts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2.9 Electric motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2.10 Diesel engine drive . . . . . . . . . . . . . . . . . . . . . . . . . . .6
3. USE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
3.1 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
3.2 Pumping hot products . . . . . . . . . . . . . . . . . . . . . . . . . .7
3.3 Pump filled with product at shutdown . . . . . . . . . . . . . .7
3.4 Starting-up the pump . . . . . . . . . . . . . . . . . . . . . . . . . .7
3.5 Shutting down the pump . . . . . . . . . . . . . . . . . . . . . . . .7
3.6 Scrapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
4. OPENING THE PUMP TO INSPECT THE CYLINDER/
PISTON AND BUSHINGS . . . . . . . . . . . . . . . . . . . . . . . . .8
4.1 Necessary tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
4.2 Removing the front cover . . . . . . . . . . . . . . . . . . . . . . .9
4.3 Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
5. MECHANICAL SEALS . . . . . . . . . . . . . . . . . . . . . . . . . . .10
5.1 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
5.2 Dismantling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
5.3 Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
6. BYPASS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
6.1 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
6.2 Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
6.3 Inversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
6.4 Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
6.5 Obtaining the flow . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
6.6 Energy consumption . . . . . . . . . . . . . . . . . . . . . . . . . .14
6.7 Standard bypass use . . . . . . . . . . . . . . . . . . . . . . . . .14
7. MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
7.1 Greasing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
7.2 Checking of parts . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
8. TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . .15
9. CERTIFICATE OF CONFORMITY . . . . . . . . . . . . . . . . . .18
Unit without suffix :
Differential pressure, for example, pressure difference between
equipment suction and discharge.
Unit with suffix "a" :
Absolute pressure.
Unit with suffix "g" :
Gauge pressure, given regarding to atmospheric pressure
(~101325 Pa, taken at 1 bar / 14,5 psi in this IOM).
Pompe
P
asp
P
re
f
Psuc Pdis
Pump
Example :
Psuc = -0,2 barg = 0,8 bara
Pdis = 8,8 barg = 9,8 bara
∆P= Pdis - Psuc = 9 bar
USED PRESSURE UNITS

3/18NT 1003-D00 09.12 AF HT e
1. OVERALL DIMENSIONS
Weight : 28 kg
EBypass valve.
PPump plate.
P1 Mechanical seal bleed valve.
SMounting point for probe : M6 - threaded width : max. 8 mm.
VPump drain.
Noise level
The sound level of a pump is greatly influenced by its condi-
tions of use. Cavitation and pumping products with high gas
contents generally increases the sound level.
Under the following pumping conditions :
• excluding cavitation
• discharge pressure : 5 bar
• speed of rotation 625 rpm
• product viscosity of 1 cSt
The sound level reached for the AF HT pump in good condi-
tions (ignoring the motor and gearbox noise) is less than
78 dB(A).

4/18NT 1003-D00 09.12 AF HT e
2. INSTALLATION
2.1 Choice of pump
To obtain the service expected from a MOUVEX pump,
regarding both performance and longevity, it is vital that
the type of pump, its speed and the materials used for its
construction are determined as a function of the pump
output, its installation and operating conditions.
You can contact our Technical Services at any time to
ask for the information you require.
2.2 Piping diameters
The location of the pump in the transfer or recycling circuit
should always be determined so as to reduce the suction
height and length of the piping as much as possible.
The diameter of the pipes must be determined as a func-
tion of their length on the one hand, and the flow and vis-
cosity of the product on the other, so that head loss
remains within design limits. Therefore it is difficult to
give general and precise directions.
However, we recall that it is never prejudicial to plan for
wide piping diameters, particularly regarding the intake.
For the discharge, it is also possible to plan for a diame-
ter equal to that of the pump's orifices, and on the inta-
ke, for a wider diameter if suction is very strong. In the
case of viscous products, the determination of this dia-
meter is very important since the variation of head loss
is proportional to the viscosity and inversely proportional
to the power of 4th of the diameter. Therefore a small
reduction of piping diameter can have major consequen-
ces. Our Technical Services are always available to pro-
vide you with precise data if you give them accurate
information or, better still, the installation plans.
2.3 Piping assembly
Wherever possible, siphons and reverse slopes in the
suction piping must be avoided and all the gaskets must
be installed with great care to avoid air from entering the
piping.
The elbows must always have a large radius and must
not be assembled too close to the pump flanges, at the
inlet as well as the outlet side.
A straight pipe 5 diameters is recommended between
the pump flange and any pipe fitting (elbow, valve…).
The stresses exerted by the piping on the pump can
deform the pump parts, increase wear, misalign the bea-
rings and even cause parts to break.
The pipes must be designed to allow thermal expansion
and contraction and be firmly secured (the use of flexi-
ble hoses and expansion loops is recommended).
We recommend placing isolating valves close to the
pump flanges to permit dismantling and replacement
without having to drain the installation. These valves
should have the same diameter as the pipes and, by
preference, be a full bore model.
A strainer should be fitted in the suction line to prevent
the introduction of foreign bodies into the pump.
Before installing the new piping and tanks, clean them
carefully to remove welding waste, rust, etc., which
when carried by the liquid may damage the pump.
If the liquid may freeze or solidify, prepare for draining
the piping by installing drain taps at the low points and
air vents at the high points.
In the case of a very high intake or if you wish to prevent
the piping from emptying at shutdown, you can install a
foot valve. It should have a large diameter so as not to
generate additional head loss.
2.4 Direction of rotation
The MOUVEX pump is reversible; this allows it to always
circulate the liquid in the desired direction by choosing
the corresponding direction of rotation.
The intake and discharge sides are determined as fol-
lows :
When an observer faces the shaft, if rotation takes place
clockwise, the intake is on the left; on the contrary if the
rotation is anticlockwise, the intake is on the right.
Figure A - Clockwise rotation
Suction Discharge
FAILURE TO RELIEVE THE SYSTEM
PRESSURE PRIOR TO PERFORMING
ANY WORK ON THE PUMP OR THE
INSTALLATION CAN CAUSE PERSONAL
INJURY OR PROPERTY DAMAGE.
WARNING
Hazardous pressure
can cause
personal injury
or property damage.
FAILURE TO RELIEVE THE SYSTEM
PRESSURE PRIOR TO PERFORMING
ANY WORK ON THE PUMP OR THE
INSTALLATION CAN CAUSE PERSONAL
INJURY OR PROPERTY DAMAGE.
WARNING
Hazardous pressure
can cause
personal injury
or property damage.

5/18NT 1003-D00 09.12 AF HT e
2. INSTALLATION (continued)
2.5 Bypass
The bypass protects only the pump in only one direction, but
it is reversible. Cap A must be on the intake side. This must
be done before the pump is started for the first time and reva-
lidated if the pumping circuit changes.
Once the pump is drained, the bypass can easily be
changed to the correct direction by dismantling the
screws of the fastening pins and by turning the bypass
180° : before locking it in its new position, make sure
that you carefully install the seals beneath it.
2.6 Cleaning
Since the pumps are delivered well greased, they must be
cleaned before starting them up (especially when trans-
ferring food products, for example).
Cleaning can be done either by circulating an appropriate
liquid, or by removing the front cover of the pump and
carefully cleaning the internal parts. (cf. § OPENING THE
PUMP).
2.7 Anchoring the pump units
The correct seating of the pump is vital for its efficient
operation and its longevity.
The surface must be resistant enough to absorb the
stresses due to the pump unit without deformation.
In the case where the unit is fastened by anchor lugs or
bolts, it must be carefully wedged to prevent any defor-
mation of the chassis when tightening the bolts.
Deformation of the chassis will cause stress prejudicial
to the pump and the drive device and put the coupling
out of true, thereby causing vibrations, noise and prema-
ture wear. Care must be taken so that the chassis is
clear of the ground, apart from the base plates.
The chassis is equipped with a ground connection that
must be used.
We recommend leaving an unoccupied space of about
50 cm, on either end of the chassis, to permit access to
the bolts fastening the pump, reduction gear and motor
together.
2.8 Alignment of motor / pump and reduction
gearbox / pump shafts
The motor and pump shafts are perfectly aligned in the
factory before shipment, but they must be checked and
realigned after installation if necessary.
To check the alignment and coupling, use a set square
to control the axial misalignment, and feeler gauges for
angular misalignment.
WARNING
Dangerous voltage.
Can cause
injury and death.
DISCONNECT THE ELECTRICITY SUPPLY
BEFORE ANY MAINTENANCE OPERATION.
WARNING
Do not operate
without guard
in place.
OPERATION WITHOUT THE SHAFT
PROTECTOR CAN CAUSE SERIOUS
PERSONAL INJURY, MAJOR PROPERTY
DAMAGE, OR DEATH.
Suction
Discharge
IF PUMPING HAZARDOUS OR TOXIC
FLUIDS, THE SYSTEM MUST BE FLUSHED
PRIOR TO PERFORMING ANY SERVICE
OPERATION.
WARNING
Hazardous or toxic
fluids can cause
serious injury.
FAILURE TO RELIEVE THE SYSTEM
PRESSURE PRIOR TO PERFORMING
ANY WORK ON THE PUMP OR THE
INSTALLATION CAN CAUSE PERSONAL
INJURY OR PROPERTY DAMAGE.
WARNING
Hazardous pressure
can cause
personal injury
or property damage.

6/18NT 1003-D00 09.12 AF HT e
2. INSTALLATION (continued)
The 3 figures below show the operation clearly.
It is important to control the alignment at every step of
installation in order to ensure that none of these steps
generates stress on the pump unit or the pump itself :
• after fastening on foundations
• after fastening the piping
• after the pump has operated at normal operating
temperature.
REMINDER :
Do not rely on the flexible coupling to compensate for
misalignment.
2.9 Electric motors
Check that the supply voltage matches the indications
on the motor rating plate.
Comply with the wiring diagram, make sure the wires are
rated for the power and take care with the contacts
which must be thoroughly tightened.
The motors must be protected by appropriate circuit
breakers and fuses.
Connect the regulatory ground connections.
Check the direction of rotation :
This fundamental checking of the pump must be done
without any product, with the inlet and outlet circuit open
to the air, for example, to avoid any risk of an unexpec-
ted pressure rise. Start the pump empty to check the cor-
rect operation of the connections and check that the
direction of rotation corresponds to installation's inlet
and outlet direction. Follow the instructions below if
necessary to change the direction of rotation.
Three phase motor : switch any two wires or two phases
of the current supply.
Two phase motor : switch the two wires of the same
phase.
Single phase motor : comply with the instructions of the
manual supplied with the motor.
2.10 Diesel engine drive
Do not forget that these engines are not reversible. It is
therefore vital to carefully check the inlet and outlet sides
of the pump before connecting the pump unit to the
piping.
The use of diesel engines is now well known.
Nevertheless, we strongly recommend that you carefully
read the technical manuals concerning them.
DISCONNECT THE ELECTRICITY SUPPLY
BEFORE ANY MAINTENANCE OPERATION.
WARNING
Dangerous voltage.
Can cause
injury and death.
THE SURFACES CAN BE AT A TEMPE-
RATURE LIABLE TO CAUSE INJURY
OR SEVERE DAMAGE.
CAUTION
Excessive temperature-
can cause injury or
severe damage.
OPERATION WITHOUT THE SHAFT
PROTECTOR CAN CAUSE SERIOUS
PERSONAL INJURY, MAJOR PROPERTY
DAMAGE, OR DEATH.
WARNING
Do not operate
without guard
in place.
Carry out a control on 4 points:
At the top - at the bottom - on the left - on the right
Correct
Axial alignment
out of true
Angular alignment
out of true

7/18NT 1003-D00 09.12 AF HT e
3. USE
3.1 Storage
In the case of prolonged shutdown or storage, we
recommend dismantling the pump and greasing it tho-
roughly. If it cannot be dismantled, it should be filled with
oil via its orifices (inlet and outlet) and rotated slowly by
hand to allow the oil to penetrate. The flange seal surfa-
ces should be thoroughly greased to protect them
against atmospheric oxidation.
3.2 Pumping hot products
When pumping products at high temperatures, take care
when starting the pump for the fist time, tighten the bolts
to compensate for expansion effects.
3.3 Pump filled with product at shutdown
In the case where the pumping circuit is situated bet-
ween isolating valves and/or has a check valve, you
must bear in mind the variations in temperature that can
occur, leading in particular to the expansion of the pro-
duct in the circuit. In this case, provide a means of relea-
sing the expansion volume.
The use of a relief valve can suffice for this function. The
opening pressure of this valve must be compatible with
the pressure allowed by the parts composing the circuit.
With products including particles that settle at shutdown,
it is necessary to ensure that the consistency of the
deposited products will not affect the start-up of the
pump.
3.4 Starting-up the pump
Before starting up the pump, always ensure that the
pumping conditions are correct, with the corresponding
valves open, especially the inlet valve. For products
requiring heating, they must be brought to their pumping
temperature before starting the pump.
3.5 Shutting down the pump
When shutting down the pump, we recommend waiting
for the pump to stop completely before closing the val-
ves, especially the inlet valve.
3.6 Scrapping
The pump must be scrapped in compliance with the
regulations in force.
During this operation, particular care must be paid to the
drainage stages of the pump (pumped product).
FAILURE TO INSTALL ADEQUATELY
SIZED PRESSURE RELIEF VALVE(S)
CAN CAUSE PROPERTY DAMAGE, PER-
SONAL INJURY OR DEATH.
WARNING
Hazardous pressure
can cause
personal injury
or property damage.
THE SURFACES OF THE PUMP CAN
BE AT A TEMPERATURE LIABLE TO
CAUSE INJURY OR SEVERE DAMAGE.
CAUTION
Excessive temperature-
can cause injury or
severe damage.
OPERATION WITHOUT THE SHAFT
PROTECTOR CAN CAUSE SERIOUS
PERSONAL INJURY, MAJOR PROPERTY
DAMAGE, OR DEATH.
WARNING
Do not operate
without guard
in place.
FAILURE TO RELIEVE SYSTEM PRESSURE
PRIOR TO PERFORMING PUMP SERVICE
OR MAINTENANCE CAN CAUSE PERSONAL
INJURY OR PROPERTY DAMAGE.
WARNING
Hazardous pressure
can cause
personal injury
or property damage.

8/18NT 1003-D00 09.12 AF HT e
4. OPENING THE PUMP TO INSPECT
THE CYLINDER/PISTON AND BUSHINGS
Before opening the pump, always ensure that it has been drained and release the pressure it may contain.
Make sure the isolation valves, if any, are closed before pulling out the drain plug 434 and its seal 412.
FAILURE TO RELIEVE SYSTEM PRESSURE
PRIOR TO PERFORMING PUMP SERVICE
OR MAINTENANCE CAN CAUSE PERSONAL
INJURY OR PROPERTY DAMAGE.
WARNING
Hazardous pressure
can cause
personal injury
or property damage.
IF PUMPING HAZARDOUS OR TOXIC
FLUIDS, THE SYSTEM MUST BE FLUSHED
PRIOR TO PERFORMING ANY SERVICE
OPERATION.
WARNING
Hazardous or toxic
fluids can cause
serious injury.
DISCONNECT THE ELECTRICITY SUPPLY
BEFORE ANY MAINTENANCE OPERATION.
WARNING
Dangerous voltage.
Can cause
injury and death.
DISCONNECTING THE FLUID OR PRES-
SURE CONTAINMENT COMPONENTS
DURING PUMP OPERATION CAN CAUSE
SERIOUS PERSONAL INJURY, DEATH
OR MAJOR PROPERTY DAMAGE.
WARNING
Hazardous pressure
can cause
personal injury
or property damage.
THE PUMP LUBRICANT IS VERY SLIPPERY
AND MAY CAUSE SERIOUS INJURY.
ANY SPILLS MUST BE CLEANED UP.
CAUTION
Slippery lubricant.
Spills should be
cleaned up.
BE CAREFUL WITH THE WEIGHT OF
THE PARTS WHEN THEY ARE BEING
REMOVED.
WARNING
The weight ot the parts can
be dangerous and may
provoke bodily injuries or
material damages.

9/18NT 1003-D00 09.12 AF HT e
4. OPENING THE PUMP TO INSPECT
THE CYLINDER/PISTON AND BUSHINGS (continued)
Bypass fastening
For the SEALS refer to
the specified drawing
Serial Nbr
4.1 Necessary tools
• 1 plastic mallet
• Extractor
• Retaining ring pliers
• 13 flat spanner
• 6/4 hexagon socket wrench
Makeup torque : M8 : 23 Nm.
4.2 Removing the front cover
To remove front cover
Unscrew the bolts 409 securing the front cover.
Remove the front cover 401 by progressively separating
it from the pump body.
To remove piston
Remove the sleeve 515 by using the nut to release it.
Using a screwdriver as a lever, extract the piston 301.
The pumping characteristics demand a cylinder/piston
with matching dimensions. Consequently, changing the
cylinder or piston requires the replacement of both the
cylinder and the piston.
To remove mechanical seal and shaft
Remove the mechanical seal and the shaft by following
the directions § MECHANICAL SEAL.
4.3 Reassembly
Reassembly is done in the reverse order than the dismantling.
Take the following precautions :
• Check the condition of the mechanical seal (see §
MECHANICAL SEAL).
• Check that springs 504 of piston bearing 503 have not
weakened. Light load must be applied to the springs
in order to insert the piston 301 into the cylinder 201.
• Check also that the piston backspring 310 has not
weakened.
• Before refitting the front cover 401, do not forget to
refit the front cover seal 403 after making sure it is in
good condition.
BE CAREFUL WITH THE WEIGHT OF
THE PARTS WHEN THEY ARE BEING
REMOVED.
WARNING
The weight ot the parts can
be dangerous and may
provoke bodily injuries or
material damages.

10/18NT 1003-D00 09.12 AF HT e
5. MECHANICAL SEALS
5.1 Operation
Shaft 501 drives the rotating part 697 of the mechanical
seal in a rotary motion.
The stationary seal face 604 of the seal is fixed in the
mechanical seal holder 701 with the stopper 627.
Sealing is done with the mechanical seal 600a :
• on the shaft by the rotating part seal ,
• by the mating surface between the rotating part and
the fixed part,
• in the bore of the mechanical seal holder 701 by the
fixed part seal.
Sealing is therefore done as a function of the condition
of these contact surfaces and the seals.
Before starting up the pump, it is essential to bleed air
from the mechanical seal holder 701 via the plug 738
(the air is replaced by the product being pumped or a
compatible product).
5.2 Dismantling Before opening the pump, make sure the pump has
been drained and take the necessary precautions to pre-
vent it from starting up.
It must not be possible to start it up, even by accident.
The pump must be at ambient temperature.
After opening the pump (see § 4.) :
• Remove the screws 776 on the pump side.
• Take out the mechanical seal holder 701 and bearing
736 assembly with the shaft 501 by tapping with a mal-
let on the end of the shaft 501 opposite the drive end.
• Remove the screws 706, the cover 705 and the circlips
704.
• Remove the screws 776 from the drive end.
• Use an extractor to take out the assembly of the
mechanical seal holder 701, bearing 732, protection
733, the washer 731 and fixed part of the mechanical
seal 600a.
• Remove the screws from the rotating part of the mecha-
nical seal 600a and separate it from the shaft 501.
• Remove the fixed part of the mechanical seal 600a
from the mechanical seal holder 701.
DISCONNECTING THE FLUID OR PRES-
SURE CONTAINMENT COMPONENTS
DURING PUMP OPERATION CAN CAUSE
SERIOUS PERSONAL INJURY, DEATH
OR MAJOR PROPERTY DAMAGE.
WARNING
Hazardous pressure
can cause
personal injury
or property damage.
DISCONNECT THE ELECTRICITY SUPPLY
BEFORE ANY MAINTENANCE OPERATION.
WARNING
Dangerous voltage.
Can cause
injury and death.
IF PUMPING HAZARDOUS OR TOXIC
FLUIDS, THE SYSTEM MUST BE FLUSHED
PRIOR TO PERFORMING ANY SERVICE
OPERATION.
WARNING
Hazardous or toxic
fluids can cause
serious injury.
FAILURE TO RELIEVE SYSTEM PRESSURE
PRIOR TO PERFORMING PUMP SERVICE
OR MAINTENANCE CAN CAUSE PERSONAL
INJURY OR PROPERTY DAMAGE.
WARNING
Hazardous pressure
can cause
personal injury
or property damage.

11/18NT 1003-D00 09.12 AF HT e
5. MECHANICAL SEALS (continued)
5.3 Reassembly
• The seals 717, 739, screws 776 and 706, support washer
731, circlips 704, lip seal 707, protection 733, mechani-
cal seal 600a and plug 738 must be changed whenever
removed.
• Thoroughly clean the part of the shaft in contact with the
mechanical seal (surface must be free from scratches).
• Refit all the parts onto the shaft 501 in the opposite
order to disassembly.
• Make sure the notch in the fixed part of the mechanical
seal 600a engages in the pin 627.
• When refitting the mechanical seal holder 701, check
the leak drain hole faces downwards.
• Make sure the lip seal 707 is not cut when refitting the
cover 705.

12/18NT 1003-D00 09.12 AF HT e
6. BYPASS
Before starting the pump, make sure that it rotates in the
right direction in relation to the direction in which you
want the product to flow. Make sure that the bypass is
positioned correctly in relation to the direction in which
the product flows (see § 2.4 DIRECTION OF ROTATION).
If you have to reverse the bypass to adapt it to the pro-
duct flow direction (see § 2.4 DIRECTION OF ROTATION),
drain the pump and remove all internal pressure from it
by conforming to the drainage procedures applicable to
your installation.
All operations on the bypass require that you take the
necessary precautions when handling components ope-
rating at high temperature. You must use appropriate
protective equipment.
Before adjusting the bypass, make sure that the entire
installation is designed to withstand the maximum pres-
sure generated by the pump at its maximum setting.
6.1 Operation
The normal HT bypass operates like a safety valve, by
automatically limiting the discharge pressure at the
value for which it is adjusted.
When the discharge pressure reaches the adjusted
pressure of the spring, the valve 823 opens, thus permit-
ting the partial or total return of the liquid to the inlet side
of the pump.
It should be noted that the role of the bypass, as a safe-
ty device, is limited to protecting the pump against acci-
dental over-pressure. For all electric motors (unless the
model used can handle the increased load due to maxi-
mum overpressure) it is vital to provide appropriate over-
load protection.
6.2 Orientation
The normal HT bypass only protects the pump in one
direction of operation. Consequently it is necessary to
check that the pumps direction of operation is correct by
verifying that the cap 833 is located on the inlet side. The
bypass must be reversed if in the wrong direction.
WARNING
Hazardous pressure
can cause
personal injury
or property damage.
INCORRECT SETTINGS OF THE PRESSURE
RELIEF VALVE CAN CAUSE PUMP
COMPONENT FAILURE, PERSONAL
INJURY, AND PROPERTY DAMAGE.
WARNING
Hazardous or toxic
fluids can cause
serious injury.
IF PUMPING HAZARDOUS OR TOXIC
FLUIDS, THE SYSTEM MUST BE FLUSHED
PRIOR TO PERFORMING ANY SERVICE
OPERATION.
CAUTION
Slippery lubricant.
Spills should be
cleaned up.
THE PUMP LUBRICANT IS VERY SLIPPERY
AND MAY CAUSE SERIOUS INJURY.
ANY SPILLS MUST BE CLEANED UP.
FAILURE TO RELIEVE SYSTEM PRESSURE
PRIOR TO PERFORMING PUMP SERVICE
OR MAINTENANCE CAN CAUSE PERSONAL
INJURY OR PROPERTY DAMAGE.
WARNING
Hazardous pressure
can cause
personal injury
or property damage.

13/18NT 1003-D00 09.12 AF HT e
6. BYPASS (continued)
6.3 Inversion Before commencing work, make sure that the pump
cannot be started up, even accidentally. Before opening
the pump, it must be drained and relieved of any pressu-
re it may contain. Take care to check that the isolation
valves, if any, are closed before pulling out the drain
plug 434 and its seal 412.
To reverse the bypass, unscrew the nuts 815 on the
studs 813, remove the washers 814 and turn the bypass
through 180°.
Before locking the bypass in its new position, check the
condition of the seals 877 and their installation.
Tighten the nuts on the studs, taking care to balance the
tightening so that the bypass remains vertical.
6.4 Adjustment
To adjust the bypass, unscrew the cap 833 and its seal
832, turn the adjustment nut 834 clockwise to increase
the discharge pressure, and anticlockwise to decrease
it. Once the adjustment is finished, do not forget to re-
screw the cap 833 and its seal 832.
Adjustment of the bypass is satisfactory when the flow
meets the pumps requirements and when the motor
bears the power increase due to the overpressure seen
upon closing the discharge. This is how the bypasses of
our pump units are adjusted, as a function of the infor-
mation provided by our Technical Services.
The pumps supplied bare shaft are delivered with a stan-
dard bypass setting which needs to be adjusted with the
exact working conditions and installation, as per the
above described procedure.
WARNING
Hazardous or toxic
fluids can cause
serious injury.
IF PUMPING HAZARDOUS OR TOXIC
FLUIDS, THE SYSTEM MUST BE FLUSHED
PRIOR TO PERFORMING ANY SERVICE
OPERATION.
WARNING
Hazardous pressure
can cause
personal injury
or property damage.
FAILURE TO RELIEVE SYSTEM PRESSURE
PRIOR TO PERFORMING PUMP SERVICE
OR MAINTENANCE CAN CAUSE PERSONAL
INJURY OR PROPERTY DAMAGE.
WARNING
The weight ot the parts can
be dangerous and may
provoke bodily injuries or
material damages.
BE CAREFUL WITH THE WEIGHT OF
THE PARTS WHEN THEY ARE BEING
REMOVED.
WARNING
Hazardous pressure
can cause
personal injury
or property damage.
PUMPS OPERATING AGAINST A CLOSED
VALVE CAN CAUSE SYSTEM FAILURE,
PERSONAL INJURY AND PROPERTY
DAMAGE.
DISCONNECT THE ELECTRICITY SUPPLY
BEFORE ANY MAINTENANCE OPERATION.
WARNING
Dangerous voltage.
Can cause
injury and death.
Loading (bar)
Mini Maxi
0,8 5,6

14/18NT 1003-D00 09.12 AF HT e
6. BYPASS (continued)
6.5 Obtaining the flow
Before carrying out any adjustments, make sure that there
is a means of reading the pressure during adjustment and
that the components of the circuit are rated for the adjust-
ment pressure. The pressure must at no time exceed the
pressure rating of the lowest rated component.
If the flow is lower than anticipated, the cause may be
due to incorrect adjustment of the bypass valve.
To correct the flow, gradually tighten the adjustment nut
834 after making sure that the pump is running well at
the recommended speed.
If during adjustment, you compress the spring to its limit
or disturb the operation of the motor, without obtaining
the flow required, this means that the pump unit must
operate with a pressure higher than that for which it was
designed. In this case you should consult our Technical
Services.
When you obtain the required flow, make sure that the
motor can withstand the increased power due to the
overpressure created by closing off the discharge line.
6.6 Energy consumption
If the energy consumption does not correspond with
expectations, the reason may be poor adjustment of the
bypass valve.
If consumption is low and you do not get the required
flow, close the discharge valve and tighten the adjust-
ment nut until the correct power consumption level is
reached. Then open the discharge valve as it was befo-
re adjustment.
If consumption is high, close the discharge piping and
slacken the adjustment nut until the correct power
consumption level is reached. Then open the discharge
valve as it was before adjustment.
6.7 Standard bypass use
HT normal bypass should not be operated too frequent-
ly-even less permanently-since it would result in useless
power consumption and material fatigue detrimental to
equipment life.
NOTICE :
Coat the faces of flat seals with dough EPPLE or equi-
valent before reassembly.
PUMPS OPERATING AGAINST A CLOSED
VALVE CAN CAUSE SYSTEM FAILURE,
PERSONAL INJURY AND PROPERTY
DAMAGE.
WARNING
Hazardous pressure
can cause
personal injury
or property damage.
7. MAINTENANCE
7.1 Greasing
Except for special cases, the MOUVEX pump only requi-
res lubrication of the shaft inlet bearing.
Use a grease for good quality ball bearings.
Lubrication must be done every 1,000 hours of operation
or at least once a year.
The quantity of grease to be added must not exceed 8,5 cm3.
For pumps operating at high temperatures (in principle
from 100°C upwards) use a grease with a high drop
point.
If the pump is equipped with a Stofer oiler, and when the
type of product requires it, the pump must be greased
before each start-up, after each shutdown and every 3 to
4 hours of continuous operation.
Preference should be given to lubricants insoluble in the
product pumped and, in the case of hot products, lubri-
cants that maintain good viscosity at the operating tem-
perature.
The other elements of the pump unit (motor, reduction
gear) should be maintained in conformity with their spe-
cific technical instructions.
7.2 Checking of parts
The piston 301 and the cylinder 201 are active parts
(wearing parts). These parts must be replaced if the
thickness measurements are lower than the following
values :
- Piston (301) . . . . . . 6,1 mm
- Cylinder (201) . . . .40,8 mm
301
201

15/18NT 1003-D00 09.12 AF HT e
8. TROUBLESHOOTING
ZERO OR INSUFFICIENT FLOW
1PRELIMINARY CHECKS
1-1
Make sure that the plastic plugs have been taken away from the ports of the pump and that the pump is
running (defective drive, damaged motor, etc., faulty transmission : broken coupling, sliding belt, worn or
poorly coupled clutch, etc.).
1-2
Make sure that the pump rotates in the correct direction corresponding to the direction in which the liquid
circulates in the installation (cf. the pump plate). If necessary, change the electric motor connections or
adjust the piping as necessary (diesel engine drive).
1-3 Make sure that there is liquid in the tank from which the pump draws and that the end of the inlet piping is
constantly submerged.
1-4 Make sure that the pump rotation speed is sufficient. Determine this by checking the speed of the pump
motor (see motor plate) and the speed reduction ratio (see reduction gearbox plate) or use a rev. counter.
If these checks do not highlight the problem :
2MEASURE THE DISCHARGE PRESSURE (as close to the outlet of the pump as possible, with a mini-
mum distance of 5 pipe diameters).
2-1 If the pressure is lower than the figures given for the material, or null, this could be due to :
2-1-1 A poorly adjusted bypass, the valve setting is lower than the discharge pressure (tighten the set screw or
replace the spring after checking that the electric motor is suitably protected).
2-1-2 The bypass valve is not closed ; either the plunger has not returned to its initial position, or there is dirt on
the valve seat.
2-1-3 The pump is worn, this will also affect the suction capacity of the pump (cf 3-2-2 c).
2-2 If the pressure complies with the equipment data (pump speed and motor output) it is possible that :
2-2-1
The pressure required for the given installation to obtain the required flow rate is too high and the flow is
partially or totally circulating via the bypass, or :
a. the height of the discharge is too great (reduce it by bringing the discharge tank to the level where the
pump is). If suction conditions are favourable, the pump can also be moved closer to the discharge tank.
b. that head losses are too high because :
- the piping is unsuitable (too many "bends", too long or the diameter is too narrow) for the process
conditions : Flowrate, Specific Gravity, Viscosity (this can change considerably with temperature).
Reduce the head losses by simplifying the circuit : reduce of the number of fittings, valves, elbows,
etc... Move the pump closer to the discharge tank or vice versa, if conditions permit. Increase the
diameter of the piping, etc... Reduce the product viscosity via heating. Reduce the flow, etc...
- of partially blocked piping (valve partially closed, tap partially shut, cloth obscuring flow, etc.).
2-2-2 The discharge piping is completely blocked (valve fully closed, tap completely closed, cloth plugging flow,
full protection seal left by carelessness, etc...), in this case, all the liquid passes via the bypass.

16/18NT 1003-D00 09.12 AF HT e
8. TROUBLESHOOTING (continued)
3MEASURING THE VACUUM PRESSURE (as close as possible to the pump inlet, inlet side).
3-1 If the vacuum is high, e.g. higher than or equal to 6 to 7 metres WC (0.6 to 0.7 bara i.e. about 45 or
50 cm of mercury), this can result in pump noise. The cause could be :
3-1-1
a. the suction lift is too high (reduce it by taking the pump down closer to the level of the liquid)
b. the dynamic suction losses are too high :
1. cf 2-2-1 b
2. the inlet piping orifice is too close to the bottom of the tank.
3-1-2 The inlet piping is completely blocked (valve, tap, filter, cloth, full seal forgotten, etc.)
3-1-3
The liquid vapour pressure is too high (or has become too high following, for example, a change of tem-
perature). Bring the pump closer to the level of the liquid, install the pump closer to the feed or cool the
liquid to reduce the vapour pressure.
3-2
If the vacuum is low, for example, less than 3 metres WC (i.e. about 20 cm of mercury), check for leaks
on the inlet pipe, isolate the pump from the inlet piping (by closing the valve nearest the pump or by inser-
ting a full flange seal) and measuring the vacuum once again.
3-2-1
If the vacuum is high with the isolating valve closed on suction line, e.g. higher than or equal to 6 or 7
metres WC (i.e. about 45 to 50 cm of mercury), the pump is not the cause :
a. there must be an air inlet upstream of the pump isolating valve.
b. the liquid vapour pressure is or has become too elevated due to a change of temperature (cf 3-1-3).
3-2-2
If the vacuum is low or non-existent, the reason could be :
a. that the bypass valve is not closing properly, due to dirt on the valve seat.
b. air is entering the pump (check the front cover seals, flanges, etc...)
c. the pump is worn and the internal tightness is out of specification (the piston bushings are worn, worn
piston and cylinder, broken piston wear compensation springs, worn partition, broken shaft).
ABNORMAL HEATING OF BEARINGS
4This heating can be caused by :
4-1 - excessive tension in the transmission (belt or chain) on the pump shaft.
4-2 - excessive pulling on the pump flanges by the piping (in this case, it must have been necessary to force
the piping into position to connect it to the pump).
4-3 - poor alignment of the pump - due for example to 4-2 (the pump is partially or totally uncoupled, the
pump shaft and drive shaft are not aligned with each other).
4-4 - inadequate anchoring of the pump unit leading to deformation of the chassis (make sure that the chas-
sis is clear of the ground except for the 3 anchoring points).
4-5 - seizing of the bushings (cured product preventing lubrication and cooling, excess power, etc...).
LEAKING SEALS
5
The seal may leak if :
a. it was damaged during assembly (scratching on the shaft), damage to ‘O’rings in seal,
b. it is incompatible with the product (chemical and mechanical aggression / abrasion of ‘o’ rings and seal faces),
c. it is worn through normal use.
6The shaft is worn at the seal or does not rotate correctly due to poor alignment, excessive tension on the
transmission belts, chains, etc...

17/18NT 1003-D00 09.12 AF HT e
8. TROUBLESHOOTING (continued)
ABNORMAL NOISES
These noises can be caused by hydraulic and mechanical sources. They can be distinguished by the fact
that only the former disappear (or at least lessen) when air is allowed into the inlet pipe.
7HYDRAULIC NOISES
These noises can come from insufficient product being supplied to the pump, or :
7-1 - the rotation speed is too high for the installation conditions (increase of viscosity due to a change of
product or a reduction of temperature, etc.).
7-2 - that the suction head is too high or has become too high due to excessive head losses following clog-
ging of the piping or filter, a change of viscosity of the liquid, etc.,
7-3 - an increase of the vapour pressure with a rise of temperature.
8MECHANICAL NOISES
These can stem from :
8-1 - the bypass valve knocking on the seat when the discharge pressure is close to the bypass adjustment
pressure (turn the adjustment screw after making sure that the electric motor is suitably protected).
8-2 - abnormal stress on the pump : the transmission is pulling on the shaft, pulling on the flanges by the
piping.
8-3 - a broken part or foreign body has entered the pump.
EXCESS POWER CONSUMPTION
9The most spectacular event occurs when a diesel engine stalls or the power to an electric motor is shut off.
9-1
If this incident occurs when closing the discharge line, the cause may be :
a. the bypass is assembled back to front.
b. the bypass is adjusted too tight.
c. the motor protection is adjusted too low or wrong circuit breaker have been fitted.
9-2
If the incident occurs during operation, the cause could be :
a. an inadequate motor (in this case, the discharge pressure complies with what was expected).
b. head losses higher than expected - following higher viscosity or specific gravity than planned initially
(in this case, the discharge pressure is higher than that planned. The pressure can be reduced by
loosening the bypass adjustment screw - the flow is decreased).
c. excessive speed of rotation.
d. a fault of the equipment (faulty alignment, deformation of the chassis, stress exerted by the piping on
the flanges, seizing, etc.).
Excessive consumption of electricity can also be due to a poor motor connection (e.g. a 3 phase motor
operating on 2 phases).

18/18NT 1003-D00 09.12 AF HT e
Est conforme aux dispositions suivantes : Directive « MACHINES » 2006/42/CE et aux législations
nationales la transposant, portant sur les dispositifs de sécurité liés aux risques mécaniques et électriques applicables aux machines tournantes.
NF EN 809:2009 NF EN 1672-2:2009 NF EN ISO 13857:2008
NF EN 12162:2009
Directive « ATEX » 94/9/CE du 23 mars 1994 et aux
législations nationales la transposant, portant sur les appareils destinés à être utilisés en atmosphères explosibles. Conformité obtenue par application des normes :
NF EN 1127-1:1997 NF EN 13463-1:2009 NF EN 13463-5:2009
Certification ATEX délivrée par INERIS*, Organisme Certificateur, et portant le marquage suivant : (C) L’équipement désigné ci-dessus doit être utilisé conformément à l’utilisation qui en a été prévue de par sa conception et sa fabrication, et conformément aux normes en vigueur. Nous, soussignés, déclarons que l’équipement concerné est conforme aux Directives listées ci-dessus et aux normes applicables s’y rapportant.
Is in conformity with the provisions of the following Directive: « MACHINES » Directive 2006/42/EEC as transposed by the national legislation, concerning safety equipments and arrangements relative to mechanical and electric risks applicable to rotative machines.
NF EN 809:2009 NF EN 1672-2:2009 NF EN ISO 13857:2008
NF EN 12162:2009
« ATEX » Directive 94/9/EC (23 march 1994) as transposed by
the national legislation, concerning equipment intended to be used in explosive atmospheres. Conformity obtained by application of the standards :
NF EN 1127-1:1997 NF EN 13463-1:2009 NF EN 13463-5:2009
ATEX Certification delivered by INERIS*, Notified Body, and with the following marking: (C) The equipment indicated above must be used according to the foreseen use by its design and its manufacturing, and according to the current standards. We, undersigned, declare that the concerned equipment is in conformity with the Directives listed above and in the applicable
standards in force.
den Bestimmungen der nachstehenden Richtlinien entspricht: „Maschinen-Richtlinie“ 2006/42/EEC wie umgesetzt im nationalen Recht hinsichtlich der Ausrüstungssicherheit und Sicherheitsvorkehrungen bezogen auf mechanische und elektrische Risiken, die für rotierende Maschinen gelten.
NF EN 809:2009 NF EN 1672-2:2009 NF EN ISO 13857:2008
NF EN 12162:2009
„ATEX“ Richtlinie 94/9/EG (23. März 1994) wie umgesetzt im nationalen Recht in Bezug auf Ausrüstungen für den Einsatz in explosionsgefährdeter Atmosphäre. Die Konformität hat Geltung durch Anwendung folgender Normen:
NF EN 1127-1:1997 NF EN 13463-1:2009 NF EN 13463-5:2009
Die ATEX-Zertifizierung wurde von der benannten Stelle INERIS* erteilt, und mit folgender Kennzeichnung: (C) Oben stehend bezeichnete Ausrüstung ist entsprechend dem durch Konstruktion und Fabrikation vorgesehenen Verwendungszweck und entsprechend den geltenden Normen einzusetzen. Die Unterzeichner erklären, dass die bezeichnete Ausrüstung den oben aufgeführten Richtlinien und den diesbezüglich geltenden Normen entspricht.
DECLARATION DE CONFORMITE
CERTIFICATE OF CONFORMITY - KONFORMITÄTSERKLÄRUNG
MOUVEX sas, ZI La Plaine des Isles – 2 Rue des Caillottes – 89 000 Auxerre France, déclare que l’équipement suivant / declares the following equipment / erklärt, dass folgende Ausrüstung:
Modèle : N° de série : (A) Répondant aux spécifications indiquées dans l’ARC N° : (B)
Designation / Bezeichnung Serial N° / Serien Nr According to the specifications recorded in the acknowledgment of order N°:
EntsprechenddenSpezifikationenausAB-Nr: Pour la Sté MOUVEX sas, fait à Auxerre le :
For Mouvex sas company – Date : Fur die Fa Mouvex sas - Datum :
Jean-François FOUIN - Responsable Qualité Quality Manager / Qualitätsbeauftragter
II ___ G ____ II ___ – T ___ Temp Max produit pompé / Max Temp Flow / Max. T° Medium = ______ °C
Configuration : Pompe / Compresseur arbre nu Groupe de pompage / de compression
Konfiguration (Pump / Compressor « bare-shaft ») (Pumping Unit / Compressor Unit)
(Pumpe / Kompressor, freies Wellenende (Pumpen- / Kompressoraggregat)
Type / Geräteart : Pompe à mvt excentré (Eccentric Disc Pump / Ringkolbenpumpe) Pompe à lobes (Lobes Pump / Drehkolbenpumpe) Pompe péristaltique (Peristaltic Pump / Schlauchpumpe) Pompe à palettes (Vanes Pump / Flügelzellenpumpe) Pompe centrifuge (Centrifugal Pump / Kreiselpumpe) Autre pompe (Other Pump / Andere Pumpe)
Compresseur à Vis (Screws compressor / Schraubenverdichter) Compresseur à palettes (Vanes compressor / Flügelzellenverdichter) Refroidisseur H
y
drauli
q
ue
(
H
y
draulic oil cooler
/
H
y
draulikkühler
)
CTRL.D025 – rév.02 du 06/06/2012 – Déclaration de conformité CE-Atex * (INERIS
–
Parc Techno Atala
–
60550 Verneuil-en-Halatte
–
France). Pa
g
e 1/2
9. CERTIFICATE OF CONFORMITY