Valmet Flowrox LPP-T32-T80 Manual

© Valmet, 4LPPT70EN - 5/2023
Installation, operation and
maintenance instructions for
Flowrox™ LPP-T32-T80 peristaltic
hose pumps
These instructions must be read carefully and understood prior to the installation, use, and servicing of this
product.
Installation, maintenance and
operating instructions

4LPPT70EN - 5/2023
2
DISCLAIMER
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Copyright © 2014-2023 Valmet Corporation. All rights reserved.

34LPPT70EN - 5/2023
READ THESE INSTRUCTIONS FIRST!
ese instructions provide information about safe handling and
operation of the product
If you require additional assistance, please contact the
manufacturer or manufacturer’s representative.
SAVE THESE INSTRUCTIONS!
Addresses and phone numbers are printed on the back cover.
Table of Contents
1 EU DECLARATION OF
CONFORMITY 4
1.1 Mechanical warranty for LPP-T pumps 5
1.2 Safety instructions for LPP-T pumps 5
2 INTRODUCTION 6
2.1 Applications and purposes of use 6
2.2 General description 7
2.3 Electrical equipment 11
2.4 Technical data 12
3 TRANSPORTATION,
STORAGE AND LIFTING 13
4 INSTALLATION 13
4.1 General 13
4.2 Pump installation 14
4.3 Electrical connection 15
4.4 Piping connections 15
5 PUMP OPERATION 16
5.1 Commissioning 16
5.2 Operation 17
6 SERVICING AND
MAINTENANCE 18
6.1 General maintenance and checks 18
6.2 Changing the hose 19
6.3 Adjusting the hose compression 27
6.4 Maintenance 29
6.5 Troubleshooting 32
APPENDIX A: Tightening
torques for LPP-T pumps 33
APPENDIX B: Required
lubricant and compression
torque values for LPP-T hoses
34
APPENDIX C: Hose leak
detector chart 38
APPENDIX D: Claim form 39
APPENDIX E: Dimensions,
LPP-T pumps 40

4LPPT70EN - 5/2023
4
1 EU DECLARATION OF CONFORMITY
is declaration of conformity is issued under the sole responsibility of the manufacturer:
VALMET FLOW CONTROL OY
Marssitie 1
53600 Lappeenranta
Finland
Tel. [phone]
Product model/type: Peristaltic Hose Pump LPP-D and LPP-T
e object of the declaration described above is in conformity with the relevant Union harmonisation legislation:
Machinery Directive 2006/42/EC: Annex II A
ATEX Directive 2014/34/EU: Non-electrical equipment
Follow the pump installation, operating and maintenance instructions in this manual.
Person authorised to compile the technical le is Technology Manager Jarmo Partanen.
On behalf of Valmet Flow Control Oy
In Lappeenranta, 13th May 2022
Riku Salojärvi
Head of Operations

54LPPT70EN - 5/2023
1.1 Mechanical warranty for LPP-T pumps
e warranty is valid for 12 months from the delivery date,
excluding the following:
• wear parts, such as gaskets, bearings, and hoses (for
requirements concerning hose manufacturing defects,
see ‘PUMP HOSES’)
• pumps that the first buyer has resold without a written
agreement with the vendor regarding the remaining
portion of the warranty period
• direct or consequential damage caused by structural
changes made to the pump or by the use of parts that are
not approved by the original manufacturer
e purchaser must ll a claim for all compensation related to
the hose and/or pump guarantee within 30 days aer the fault
has been detected. For the claim form, refer to Appendix.
If the terms indicated in the claim form are not complied
with, the purchaser loses his or her right to the guarantee.
e guarantee compensates for new parts if any damaged
parts must be replaced. Terms of delivery: packed at the
factory, with no other costs covered.
PUMP HOSES:
e hose of the pump is in contact with the pumped product
and is exposed to wear, high temperatures, pressure shocks,
chemicals and other wearing mechanisms. e pump hose
is therefore considered a wearing part that requires periodic
replacement.
Flowrox pumps have proved reliable in several demanding
applications. However, the operation conditions vary to
the extent that we cannot specify an exact service life or
guarantee period for the hose. e guarantee applies to only
manufacturing defects of the hose.
If there is a manufacturing defect, the customer is entitled to
return the defective hoses to the supplier. e supplier shall
reimburse the customer for the value of the hoses, excluding
the freight charges, packaging costs, and other expenses,
upon the following conditions:
• the pump has been used only for its intended purpose
• for all claims regarding a hose fault, the hose in question,
along with a description of the operational conditions
and method used, has been delivered to Valmet Flow
Control Oy for chemical and mechanical analysis
Possible reimbursement for a faulty hose shall be made only
aer the hose examination.
1.2 Safety instructions for LPP-T pumps
In this manual, the following symbols are used to highlight
the parts requiring particular attention:
Hazard severity panels.
DANGER!
DANGER indicates a hazard with a high level of risk
which, if not avoided, will result in death or serious injury.
WARNING!
WARNING indicates a hazard with a medium level of
risk which, if not avoided, could result in death or serious
injury.
CAUTION!
CAUTION indicates a hazard with a low level of risk
which, if not avoided, could result in minor or moderate
injury.
SYMBOL DESCRIPTION
Risk to personal safety:
Neglecting the safety measures can cause serious
personal injury or death.
Electrocution hazard:
Neglecting the safety measures can cause serious
personal injury or death.
Falling load hazard
Crushing hazard
Read the operation and maintenance instructions:
Read and understand the operation and maintenance
instructions before using the product.
Mandatory action symbol:
Obey these instructions to prevent machine
malfunctions.
Prevent accidents and ensure the pump’s appropriate
operation by complying with the safety instructions indicated
in this manual. Installation and maintenance of the pump
must be carried out by persons with appropriate training.

4LPPT70EN - 5/2023
6
e safety aspects have been considered as much as possible
in the design of the pump.
Never use the pump with the front cover or inspection glass
open. If the glass must be removed for certain maintenance
procedures, apply extreme caution. Keep all body parts away
from the danger zone.
e pump has been connected to high voltage. e
connection box must not be opened when the drive unit
is connected. Electrical work must be carried out by
professional electricians.
e pump can produce and maintain high pressure. is
must be noted when someone opens the pipe connections
etc. e pipeline can contain high pressure even aer the
pump has stopped. Unauthorised personnel are not allowed
near the pump when it is in operation. e maintenance and
servicing of the pump must be carried out by persons with
appropriate training.
Pumps must always be equipped with the safety equipment
required by national regulations as appropriate to the place of
use. Regardless of national regulations, the pump unit power
supply must be equipped with at least the following electrical
safety devices:
• emergency switch
• main switch
• motor overload protector
• fuses
WARNING!
The front cover is part of the pump’s safety equipment.
Never use the pump without the front cover or with the
front cover open.
e following optional equipment is also considered safety
equipment:
• hose leak detector: stops the pump if the hose breaks
• pressure transmitter with display and overpressure limit:
stops the pump if the overpressure limit is exceeded
2 INTRODUCTION
2.1 Applications and purposes of use
LPP-T pumps are intended for pumping liquids, liquids
containing solid matter, sludge, and aggressive liquids.
Normal pumping operations include transfer, dosing, feeding,
and drainage pumping. Use for other purposes is forbidden.
e LPP-T peristaltic hose pump is restarting and gasketless.
e gasketless pump is not damaged even if it runs dry
for a relatively long time. e only part of the pump that
is in contact with the pumped medium is the hose. e
hose is also the only part of the pump that requires regular
replacement.
WARNING!
Using the pump for any purpose other than pumping is
strictly forbidden. Pump is not a safety device.
e protection class (IP) of the pump depends on the level
of equipment installed. e normal protection class for the
motor is IP54.
Restrictions on use for LPP-T pumps
e following restrictions on use must be taken into
consideration:
• LPP-T pumps operate on the displacement principle,
producing a fixed displacement flow for the pumping
cycle. In some applications this might cause overpressure
situations that may lead to equipment damage.
• The operation of the pump is peristaltic. The
displacement flow produced by the pump is not
continuous – there is a phase in each work cycle during
which the displacement flow is zero.
• Thus the displacement flow produced by the pump is
pulsatory, which is manifested in the piping as pressure
pulsation. The pulsation can be dampened by using
flexible piping parts or pulsation absorbers. Pulsation
may be harmful for piping or other equipment connected
to the piping.
Large particles in the medium may harm or cause
puncturing of the pump hose. The maximum particle
size for the pump is 1/4 of the diameter of the hose in
use, depending on the properties of the medium and the
shape of the particles.
• Certain chemicals (especially chemicals at high
temperature) cannot be pumped, or they may
significantly shorten the operating life of the hose

74LPPT70EN - 5/2023
Using the pump in explosive conditions
Special safety precautions must be followed when the pumps
are used in explosive conditions. e compatibility of the
pump for use in conditions classied as Ex as dened by the
ATEX standard is indicated on the pump’s type plate.
Special attention must be paid to the following precautions:
• preventive maintenance measures (changing the hose
and lubricating the bearings)
• electrical earthing
• temperature of the pumped medium (heat is conducted
into the pump structures)
Other matters to be taken into consideration:
• The LPP-T pump lubricant may react with oxidising
substances, resulting in a risk of fire or explosion.
• The condition of the pump bearings and the sufficiency
of the lubricant must be checked at least every three
months (more often if the conditions so require).
• The pump frame must be earthed in case of static electric
discharge.
• The pump and the motor must be kept clean in order to
prevent excessive heat production. At normal operating
temperatures, the heat generated by the pump rotation
will not exceed 60 °C (140 °F). The surface temperature
of the pump may, however, exceed 60° C (140 °F) if the
temperature of the pumped medium is higher. When the
unit is used in compliance with the ATEX standard, the
maximum temperature of the medium is 70 °C (158 °F).
2.2 General description
Principle of operation
e pump’s operation is based on the peristaltic eect: e
cylindrical rotor, tted with a bearing, compresses the hose
during the 360-degree working cycle. e rotor is installed on
a cranksha that enables the eccentric movement; as the rotor
rotates, it pushes the pumped medium forward in the hose.
Aer the rotor, the hose returns to its original shape, thus
forming a vacuum within. e vacuum then rells with
medium from the suction side. e hose compression
is adjusted to prevent backow through the point of
compression.
Mechanical structure
Figure 1. Main components of LPP-T pumps
1. Body
2. Drive unit
3. Crankshaft
4. Rotor assembly
5. Front cover
6. Hose

4LPPT70EN - 5/2023
8
Figure 2. Exploded view of complete LPP-T pump
Item no. Description Qty
1Pump head 1
2Adapter flange 1
3Screw 4
4Drive shaft 1
5Gear motor 1
6Screw 4
7Washer 4
8Connector flange 2
9Hose 1
All exploded parts are modular and order specic. Adapter
parts vary depending on the selected gear motor.

94LPPT70EN - 5/2023
Figure 3. Exploded view of LPP-T pump head
Item no. Description Qty
1Body 1
2Crankshaft 1
3Rotor assembly 1
4Bearing 1
5Wear ring 1
6Bearing 1
7Lock washer 1
8Lock nut 1
9Radial shaft seal 1
10 Locking ring 1
11 Countersunk screw 8
12 Bushing 1
13 Geared wheel 1
14 Locking cover 1
15 Grease nipple 1
16 O-ring 1
17 O-ring 1
18 Connector 1
19 Window seal 1
20 Front window 1
21 Reinforcement plate 1
22 Plug 1
Item no. Description Qty
23 Hinge 1
24 Hex socket screw 6
25 Socket screw 6
26 Hex socket screw 2
27 Hex socket screw 8
28 Hex screw 10
29 Hex screw 14
30 Washer 6
31 Washer 14
32 Hose guide 2
33 Breather set 1
34 Front cover 1
35 Hex plug 2
36 Countersunk screw 12
37 Hose bushing 2
38 O-ring 2
Parts and quantities may vary depending on the pump size.
e cranksha has been attached with a bearing to the pole
in the middle of the rear wall of the pump housing. e drive
unit is connected to the pole with a ange.

4LPPT70EN - 5/2023
10
e motor power is conveyed from the gearbox to the
cranksha via a coupling. A eccentric bushing is tted with a
bearing to the forward crank pin of the cranksha, to which
the hose compressing rotor is connected. When the drive
unit rotates the cranksha, the rotor rolls along the hose and
compresses it at a set distance from the inner surface of the
pump housing.
e only things changing with the pumped medium and ow
parameters are the material for hose and connections as well
as drive unit size.
e LPP-T pump can be equipped with one of two drive unit
types:
• helical bewel gear (A)
• shaft-mounted gear (B)
Both drive unit options can be delivered with a solid gear
motor, or a gear with an IEC ange for a motor with standard
connections.
A B
Figure 4. Pump drive unit options

114LPPT70EN - 5/2023
2.3 Electrical equipment
Standard electrical equipment includes the following unless
the pump is equipped with a vacuum assistant:
• hose leak detector
Optional electrical equipment can include the following:
• control cabinet
• pressure transmitter with display and overpressure limit
• revolution detector
• revolution counter and speed display (without wiring or
box)
e control centre unit controls LPP-T pumps. e unit
includes the following:
• frequency inverter
• required safety equipment
• reversing switch in stopping position
• fuses
• the possibility of connecting hose leak, overpressure, and
revolution detectors
e electric motor can be operated with local speed control
(potentiometer) connected to the control cabinet, or with
remote control (4–20 mA or 0–10 V) using a control signal.
e control cabinet can be installed in connection with
the pump or as a separate unit. If the control cabinet is
delivered as a separate unit, it must be connected by a person
authorised to perform electrical connections.
e pressure transmitter, which operates with a voltage
of 24 V, is equipped with a display and a programmable
overpressure relay. It can be connected to the drive circuit
of the control cabinet with a pilot wire. If the programmed
pressure value is exceeded, the control cabinet stops the
pump automatically. e transmitter can be programmed
directly with the buttons on the transmitter. Aer stopping,
the pump can be restarted only through pressing of the
acknowledgement button.
WARNING!
Electrocution hazard. All electrification connections
must be made by professionals only.
e hose leak detector is installed outside the pump housing,
on the back wall. e detector is a two-wire, oat-type
switch connected to the pump’s drive circuit. If the hose is
punctured, the pumped medium starts leaking into the pump
housing. When the surface of the liquid reaches the hose leak
detector, the detector stops the rotation of the pump. Detector
needs to be connected to a VFD or control cabinet.
If the detector is connected to a control cabinet supplied by
Valmet Flow Control, the acknowledgement button must
be pressed aer a hose puncture. e pump can be restarted
only aer the button is pressed.
e revolution detector is an inductive sensor to be
installed at the rear wall of the pump. It sends an impulse
for each cranksha rotation detected. e sensor requires an
operating voltage of +24 V.
e revolution counter and/or speed display are installed on
the door of the control cabinet. To operate, the counter and
display require a power supply and the pulse data from the
revolution detector. e counter is equipped with battery
backup in case of power failure.

4LPPT70EN - 5/2023
12
2.4 Technical data
Pump parameters
Table 1. Pump parametres.
Pump model Maximum
production m3/h (gpm)
Production per revolution litres
(gallons)
Maximum
pressure bar (psi)
LPP-T32
(LPP-T 1.25)
5.5
(24.2)
0.87
(0.23)
10
(145)
LPP-T40
(LPP-T 1.5)
8
(35.2)
1.25
(0.33)
10
(145)
LPP-T50
(LPP-T 2)
11.5
(51.0)
2.75
(0.73)
10
(145)
LPP-T65
(LPP-T 2.5)
20
(88.0)
5.4
(1.4)
10
(145)
LPP-T80
(LPP-T 3)
40
(176.0)
12.3
(3.2)
7.5
(108)
e maximum operating pressures of the LPP-T pump range
vary from 7.5 to 10 bar. e pressure and ow produced by
an individual pump depend on the dimensions of the drive
unit.
In addition to drive unit dimensions, the pump output
depends on the following factors:
• the viscosity of the pumped medium
• suction height
Dimensions and weights
e nal dimensions and weight of the pump are determined
in part by the pump drive unit and optional equipment
installed.
e main pump dimensions are shown in the drawings on
Appendix.

134LPPT70EN - 5/2023
3 TRANSPORTATION,
STORAGE AND LIFTING
LPP-T pumps are delivered in a transport container. Use the
original container for storing and transporting the pump
until the nal installation. Store the pump and spare parts in
a clean, dry and cool place protected from sunlight. Before
unpacking the pump from the transport box, ensure that
the pump foundation is nished and of the correct size and
materials.
Pumps of certain sizes are delivered equipped with transport
supports to ensure stability of the pumps. e transport
supports must not be removed until the pump has been
secured to its foundation. For further instructions, see
Chapter 4: ‘Installation.’
If the pump unit is stored for a long time aer use, carry out
the following procedures:
• Remove all medium from the pump hose.
• Remove the hose from the pump, or release the hose
compression to prevent fatigue of the hose during
storage.
• Clean the pump housing.
• Store the pump in a clean, dry and cool place +5 - +20 °C
(+41 - +68 °F) protected from sunlight.
WARNING!
Falling load hazard. Lift the pump only with approved
lifting equipment of sufficient carrying capacity. Always
follow the instructions of the lifting equipment manuals.
Figure 5. Hoisting the pump with drive unit
Do not attach liing ropes to the liing eye on the gearbox or
the motor.
4 INSTALLATION
4.1 General
LPP-T pumps are intended for use in industrial
applications and facilities. They must be installed
indoors and protected from direct sunlight, rain, and
cold.
Only professional personnel with appropriate training
are allowed to install an LPP-T pump. All installation and
servicing tools and values are metric.
Tools needed for installation:
• fork wrench set
• allen wrench set
• torque wrench

4LPPT70EN - 5/2023
14
Always tighten the bolts in a crosswise sequence and
double check to make sure correct torque is reached.
e pump must be installed on the pedestal that is part of
the pump body. If the pump is equipped with transport
supports on delivery, the supports must not be removed until
the pump has been secured on the installation foundation as
instructed.
LPP-T pumps are delivered fully assembled and ready for use,
and they are equipped with a drive unit (with the exception of
so-called pump head deliveries that are ordered without the
drive unit).
e following come as part of the installation for all pumps
delivered to the customer by Valmet Flow Control Oy:
• hose, suitable for the purpose with LPP-T lubricant
• correct compression torque for the hose
4.2 Pump installation
It is recommendable to store the pump in its transport
container until installation. See Chapter 3: ‘Transportation,
storage and liing.’
Sucient space must be le around the pump for
maintenance work.
Note that the front cover is hinged and requires opening
space.
Table 2. Minimum free distances around the pump
and flatness requirements for the pump
foundation.
Model Front
m (ft)
Right
m (ft)
Left
m (ft)
Behind
m (ft)
Flatness requirement
mm (in)
LPP-T32 & T40
(LPP-T 1.25 & T 1.5)
1
(3.3)
1
(3.3)
1
(3.3)
1
(3.3)
1
(0.04)
LPP-T50, T65 & T80
(LPP-T 2, T 2.5 & T 3)
1.5
(4.9)
1
(3.3)
1
(3.3)
1
(3.3)
2
(0.08)

154LPPT70EN - 5/2023
e pump must be installed on a suciently strong
foundation with fastening bolts or threads for fastening bolts.
A suciently strong and level foundation for the pump must
be built of either concrete or steel. e foundation must be
higher than the oor level so that the pump does not get wet
if water damages occur. e pump must be secured using
the mounting holes on the pump base plate. Other types of
securing are forbidden. Ensure that the carrying capacity of
the foundation is sucient, taking into consideration the
weight of the pump and potential loads during use.
The pump must be installed with the base plate
downwards.
Table 3. Bolts for the pump foundation and their
tightening torques.
Model Bolt Tightening torque (Nm)
LPP-T32, T40, T50, T65
& T80
(LPP-T 1.25, T 1.5, T 2, T
2.5 & T 3)
M24 x 70 660
Always tighten the bolts in a crosswise sequence and
double check to make sure correct torque is reached.
CAUTION!
Crushing hazard. Do not remove any transport supports
before the pump has been secured to the foundation.
When the foundation is ready for installation, install the
pump in the following order:
• Lift the pump onto the pedestal as instructed in Chapter
3.
• Fasten the pump in place with foundation bolts, and
tighten the bolts to the torque given in Table 3 (‘Bolts for
the pump foundation and their tightening torques’).
• Remove the transport supports, if any.
If the pump is installed in dirty surroundings where its
motor is susceptible to fluid splashes, or dust, the motor
must be equipped with protection. An unclean motor
can overheat and become damaged.
For gear motors with an IEC flange, the motor is
installed to the gear only after the pump has been
secured to the foundation. The motor must be installed
in accordance with the manufacturer’s instructions.
4.3 Electrical connection
e motor connections must be performed in accordance
with the manufacturer’s instructions. e motor power
supplies must be equipped in accordance with safety
regulations, at least with maintenance and emergency stop
switches, motor overload protection, and fuses.
WARNING!
Electrocution hazard. Before installation or maintenance,
ensure that the supply voltage has been turned off.
Only an authorised electrician is permitted to perform
the required connection work.
4.4 Piping connections
General
e rotation direction set as standard for the pump is
anticlockwise when the pump is viewed from the front (with
the transparent maintenance window).
Especially in pumping of heavy sludge, the minimum
flow velocity must be taken into consideration, to
prevent sedimentation of the medium.
Connected piping should meet the following requirements:
• To minimise pressure loss, the nominal size of the piping
should be at least one size larger than the nominal size of
the pump.
• The pump should be connected to the piping with
flexible, pressure-proof hoses to facilitate maintenance
work and to dampen the pressure shocks (pulsation)
generated by the pump. The amount of pulsation
(pressure change) depends on the following factors: the
counter pressure of the piping, the capacity of the piping,
the flow velocity, equipment installed in the piping, and
the rotation speed of the pump.
• The strength of the pipeline supports should be taken
into consideration, as the vibration in the piping may
cause strain in the pump housing.
• If the pressure shocks of the pump disturb the pumping
process, the pulsation can be dampened with special
pulsation dampers installed in the pipeline.

4LPPT70EN - 5/2023
16
• If there are closing valves on the discharge side of the
pump, a pressure relief valve that prevents overpressure
must be installed between the valve and the pump.
e discharge and suction connections of the pump consist of
standard-compliant ange connection surfaces. eir boring
is customer-specic. e lengths of the bolts required for the
ange connection are given in Table 4 below.
Table 4. Fastening bolt lengths.
Model Length of fastening bolt (mm)
LPP-T32, T40, T50, T65 & T80
(LPP-T 1.25, T 1.5, T 2, T 2.5 & T 3)
30 mm (1.18 in) + thickness of
customer flange
and gasket
5 PUMP OPERATION
5.1 Commissioning
e LPP-T pumps are normally delivered with pre-installed
hose and lubricant. Also the drive unit (gearbox and motor)
is installed prior to the delivery of the pump. In this case,
the pump is ready to be used with the nominal parameters
indicated on the pump’s type plate. Install the motor in
accordance with the manufacturer’s instructions if the pump
is delivered without it (pump head delivery).
Pumps, size LPP-T50 (LPP-T 2) or bigger, delivered without
frequency inverter need a so starter to avoid coupling
failures. is needs to be provided by the customer.
Before starting the pump, ensure that it has been installed
in accordance with these instructions and applicable safety
regulations.
At least the following must be ensured:
• The pump is used only for the purpose specified at the
time of sale.
• The hose installed is compatible with the pumped
medium.
• The parameters on the type plate are suitable for the
process values required of the pump. The piping that the
pump is connected to has sufficient ability to withstand
pressure.
• The required pressure relief valves have been connected
and work correctly.
• Electrical work has been carried out by an authorised
electrician.
• Starting the pump does not put personnel or equipment
in danger.
• The pump is correctly connected to the piping and all
connections are pressure-proof.
• The valves of all suction and pressure lines connected to
the pump are open.
• The pump settings are correct.
• The amount of hose lubricant is sufficient.
• If the pump is equipped with a frequency inverter,
the minimum frequency set is sufficient to ensure the
cooling of the pump in all conditions. If the required
minimum frequency is below 20 Hz, the pump must
always be equipped with an additional cooling fan.

174LPPT70EN - 5/2023
5.2 Operation
e continuous maximum operating speeds of the pumps
are given in Table 5. If faster operating speeds are required,
contact your nearest LPP-T pump representative.
Table 5. Maximum operating speeds.
Model LPP-T32
(LPP-T 1.25)
LPP-T40
(LPP-T 1.5)
LPP-T50
(LPP-T 2)
LPP-T65
(LPP-T 2.5)
LPP-T80
(LPP-T 3)
Speed (rpm) 100 100 70 65 55
Aer starting, the pump starts rotating at its nominal speed
(unless it is equipped with a frequency inverter). e nominal
speed produces a nominal volume ow.
If the pump is equipped with a frequency inverter, the
rotation speed of the pump depends on the value set for the
frequency inverter. If the pump is controlled with a frequency
inverter using slow rotation speeds, ensure that the pump
motor does not overheat.
Never close the pump valves on the delivery side of the
pump, as this may cause overpressure and damage the
pipeline or the pump.
If the solid matter content of the pumped medium is high, the
pipe lines must be ushed when the pump is stopped. is
prevents the formation of blockages in the piping caused by
sedimentation of the medium.
A hose leak detector can be delivered with the pump
unit. The product must be connected to the control
system in order to guarantee correct operation.
e need to replace the hose can be monitored during use
of the pump by checking the volume ow of the pump and
the pump velocity. If the volume ow per rotation is lower
than the nominal production per rotation, the hose must be
replaced.

4LPPT70EN - 5/2023
18
6 SERVICING AND
MAINTENANCE
6.1 General maintenance and checks
e process functions of peristaltic hose pumps are oen
critical. In order to guarantee problem-free and reliable
operation, the pump must be monitored, and a basic check
must be performed daily.
e hose used for transferring the pumped medium is the
only part of the pump that requires regular replacement.
Checking the condition of the hose is therefore the most
important maintenance procedure for the pump. e most
fundamental factor inuencing the duration of the service
life and the maintenance interval of the hose is correct
adjustment of the hose compression.
In changing the hose, also replace the gasket rings used
for sealing the hose and body through holes and to use the
correct amount of LPP-T lubricant.
Observation during use
e condition of the pump hose must be checked regularly.
Checking is done by visual estimation of the condition of the
hose and by monitoring the ow meter parameters.
Observation of the pump condition on the basis of ow
parameters is based on the volume ow produced by the
pump and on the rotation speed of the pump. e volume
ow (l/min) produced by the pump is divided by the rotation
speed (rpm) of the pump. e resulting volume ow per
revolution gure is compared with the equivalent gure of
a new hose, or with the gure given in the pump’s technical
specications.
e best result is achieved when the comparison is performed
using the gure for a new hose. If the production per
revolution is considerably less than the comparison gure (a
dierence of more than 5%), the hose compression must be
adjusted. e volume ow produced by the pump depends
on the properties of the pumped medium (viscosity, density,
etc.), the suction height, etc. Reduced production per rotation
indicates backow is occurring via the compression point.
e backow can be compensated for by readjusting the
hose compression (see Chapter 6.3, ‘Adjusting the hose
compression’).
e condition of the gear unit and the bearing gaskets can
be checked visually for oil or grease leaks. If any leaks are
detected, the gaskets (and bearings, if necessary) must be
replaced.
e condition of the coupling between the pump and the
gear can be determined by its sound. An abnormal pump
operating sound may indicate a damaged bearing or coupling.
The motor surface must be kept clean from oil and dirt.
If the cooling ribs of the motor are covered with dirt, the
motor may overheat and become damaged.
The process parameters may vary during operation.
Spare parts
To ensure correct and quick delivery of spare parts, the order
must contain at least the following information found on the
type plate of the pump:
1. pump serial number
2. pump type
3. nominal production and pressure of the pump
4. manufacturing year of the pump
Different product versions of the pumps are in use.
Provision of serial numbers when ordering parts helps to
identify the correct parts for the pump model.
e pump parts, with corresponding number or code,
can be found in the drawings at the end of this manual.
Lubrication
Lubricating the hose
LPP lubricants are used to reduce the friction between
the hose and the rotor. e lubricants are classed into two
dierent quality categories: food-grade quality and non-food-
grade quality. e operating temperature range for original
LPP hose lubricants is –20 °C to 100 °C (–4 °F to 212 °F).
Check the correct amount of lubricant for your pump from
Appendix.

194LPPT70EN - 5/2023
Before starting the pump, ensure that it is charged with
lubricant.
CAUTION!
Always ensure that the lubricant is compatible with
the pumped medium. Even if the LPP hose lubricant is
extremely stable, it may react with oxidising substances,
such as certain acids. In unclear situations, always contact
your local Valmet Flow Control pump representative and
ask for further information.
Lubricating the bearings
(See, in Appendix B, the section ‘Required grease additions’)
e pump unit bearings (rotor and body bearings) are
greased for three months of normal operating conditions.
Add 5% additional grease to the body bearings aer
every three months of operation (see Appendix B, section
“Required amounts of LPP lubricant”). e suitable grease
type for the bearings is SKF LGHP2 or equivalent.
If the pump is used in abnormal conditions (high
temperature or high relative air humidity), the grease may
not last as long. In such cases, more frequent greasing is
recommended to avoid bearing damage.
Do not add too much grease to the bearings. It might
force the seals out of their positions.
Needed amount of grease depends about the hose
replacement interval and pump utilization degree.
Lubricating the gearbox
e gearbox must be lubricated in accordance with the
manufacturer’s instructions (delivered with the unit).
6.2 Changing the hose
Preparations
• Before starting maintenance work, clean the pump and
the area around the pump. Ensure that the area is free
from obstructions. Ensure no impurities can enter the
pump.
• Before opening the piping assemblies flush and empty
the pipelines via the flushing connections. Close all
valves on the suction and delivery lines.
Ensure that the correct tools are available:
LPP-T32 (LPP-T 1.25)
Allen key 10mm & 14mm
Combination spanner (flat/ ring) 10mm, 19mm & 24mm
Torque wrench with socket 13mm
LPP-T40 (LPP-T 1.5)
Allen key 10mm & 14mm
Combination spanner (flat/ ring) 10mm, 19mm & 24mm
Torque wrench with socket 13mm
LPP-T50 (LPP-T 2)
Allen key 10mm & 14mm
Combination spanner (flat/ring) 10mm, 19mm & 24mm
Torque wrench with socket 17mm
LPP-T65 (LPP-T 2.5)
Allen key 10mm & 14mm
Combination spanner (flat/ ring) 10mm & 24mm
Torque wrench with socket 17mm
LPP-T80 (LPP-T 3)
Allen key 10mm & 14mm
Combination spanner (flat/ ring) 13mm & 24mm
Torque wrench with socket 17mm
Glycerin (see APPENDIX)
Hose
O-rings (x 2)
Hosepipe connected to water
Valmet Flow Control recommends that the hose change is
done by two qualified people on the LPP-T50 (LPP-T 2),
LPP-T65 (LPP-T 2.5) and LPP-T80 (LPP-T 3) pumps.
Removing the hose
CAUTION!
Do not allow unauthorised persons near the pump during
maintenance work.
CAUTION!
Liquid inside the pump may be harmful to personnel and
the environment. Use appropriate protective equipment.
Comply with local waste treatment regulations.

4LPPT70EN - 5/2023
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1. Obtain a clearance certificate for maintenance and
perform a lockout procedure. The pump must be
stopped with the rotor in the bottom most position and
turn the power off with the maintenance switch. The
rotating of the rotor is meant to be done with the crank
cam without electricity.
2. Remove the transparent maintenance window.
3. Discharge the lubricant from the pump via possible
drainage valve or, alternatively, by opening the front
cover. Protect yourself from splashes.
4. If the lubricant inside the pump was drained through
a drainage valve, open the front cover by removing its
fastening bolts.
5. With the front cover open, wash excess glycerine from
pump housing.
6. Release the hose compression to the 0% position
(read the instructions in Chapter 6.3 Adjusting the
hose compression).
7. Remove piping connections on pump suction and
discharge.
8. Open the connection flanges of the piping on both sides
of the pump.
9. Remove the top of the hose from the pump housing by
pulling it vigorously outwards.
The hose can be removed despite the plastic hose guides
inside the housing (LPP-T65 and LPP-T80). Ensure that
the hose is not squeezed between the hose guides and the
rotating rotor during installation, as this may damage the
hose.
A hose change crank cam is included with the pump delivery
if the pump is delivered as a complete with gear and motor.
e crank cam makes it possible to do the hose changing
without electricity (excluding the special pump models). If
there is no crank cam included in your pump delivery, please
contact the authorized representative of Valmet Flow Control.