VERDER VERDERFLEX Dura 55 Series User manual

Peristaltic Hose Pump
Version 01
Operating manual Dura 55
series

2 | PageVersion 01
© Verder Liquids B.V
Dura 55 series - Operating manual
Original instructions (en)
Version 01
The information in this document is essential for the safe operation and servicing of Verderex®
Dura pumps. This document must be read and understood thoroughly prior to installation
of unit, electrical connection and commissioning.

3 | PageVersion 01
© Verder Liquids B.V
Dura 55 series - Operating manual
Original instructions (en)
1. Declaration of Conformity..................................................................................................................... 5
2. About This Document............................................................................................................................ 7
2.1 Target groups ................................................................................................................................................7
2.2 Warnings and symbols..................................................................................................................................7
3. Safety ...................................................................................................................................................... 8
3.1 Intended use .................................................................................................................................................8
3.2 General safety instructions............................................................................................................................8
3.2.1 Product safety...............................................................................................................................8
3.2.2 Obligation of the operating company ............................................................................................8
3.2.3 Obligation of personnel.................................................................................................................9
3.3 Specic hazards............................................................................................................................................9
3.3.1 Hazardous pumped liquids ...........................................................................................................9
3.3.2 Sharp edges..................................................................................................................................9
3.3.3 ATEX environment ........................................................................................................................9
4. Transport, Storage and Disposal........................................................................................................ 10
4.1 Transport.....................................................................................................................................................10
4.1.1 Unpacking and inspection on delivery ........................................................................................10
4.1.2 Lifting ..........................................................................................................................................10
4.2 Storage conditions ......................................................................................................................................10
4.3 Interim storage after using the pump ..........................................................................................................10
4.4 Interim storage before using the pump .......................................................................................................10
4.5 Disposal ......................................................................................................................................................11
5. Layout and Function............................................................................................................................ 11
5.1 Design details..............................................................................................................................................11
5.2 Labelling......................................................................................................................................................11
5.2.1 Name plate..................................................................................................................................11
5.4 Bearings and lubrication..............................................................................................................................12
5.3 Layout .........................................................................................................................................................12
6. Installation and Connection................................................................................................................ 13
6.1 Preparing for installation .............................................................................................................................13
6.1.1 Checking the ambient conditions................................................................................................13
6.1.2 Preparing the installation site......................................................................................................13
6.1.3 Preparing the foundation and surface.........................................................................................13
6.2 Installation at site ........................................................................................................................................13
6.3 Planning the pipes.......................................................................................................................................14
6.3.1 Specifying supports and ange connections...............................................................................14
6.3.2 Specifying nominal diameters.....................................................................................................14
6.3.3 Specifying pipe lengths...............................................................................................................14
6.3.4 Optimizing cross-section of pipework .........................................................................................14
6.3.5 Providing safety and control devices (recommended)................................................................14
6.4 Electrical connection ...................................................................................................................................15
6.4.1 Installing the motor and gearbox (where not supplied)...............................................................15
6.4.2 Connecting to power supply........................................................................................................15
6.4.3 Shimming....................................................................................................................................16
6.5 Installing the hose .......................................................................................................................................16
6.6 Flange assembly.........................................................................................................................................17
6.6.1 Port ange assembly without insert ............................................................................................17
6.6.2 Port ange assembly with insert .................................................................................................17
6.7 Filling the pump with lubricant.....................................................................................................................18
6.7.1 Fitting the inspection window......................................................................................................18
Table of Contents

4 | PageVersion 01
© Verder Liquids B.V
Dura 55 series - Operating manual
Original instructions (en)
6.8 Connecting the pipes ..................................................................................................................................18
6.8.1 Installing the piping .....................................................................................................................18
7. Operation .............................................................................................................................................. 19
7.1 Pre-commissioning the pump......................................................................................................................19
7.1.1 Checking the direction of rotation with dry pump........................................................................19
7.1.2 Starting the Pump .......................................................................................................................19
7.1.3 Switching OFF the pump ............................................................................................................19
7.2 Commissioning the pump............................................................................................................................20
7.2.1 Switching ON the Pump..............................................................................................................20
7.2.2 Switching OFF the pump
(refer to 7.1.3).............................................................................................................................................20
7.3 Shutting down the pump .............................................................................................................................20
7.4 Start-up following a shutdown period..........................................................................................................20
7.5 Operating the standby pump.......................................................................................................................20
8. Inspection, Maintenance and Repair.................................................................................................. 21
8.1 Inspection....................................................................................................................................................21
8.2 Maintenance................................................................................................................................................21
8.2.1 Cleaning the pump......................................................................................................................21
8.2.2 Cleaning protocol for hoses ........................................................................................................21
8.2.3 Maintenance schedule................................................................................................................23
8.3 Repair..........................................................................................................................................................24
8.3.1 Preparations for dismounting......................................................................................................24
8.3.2 Returning the pump to the manufacturer ....................................................................................24
8.3.3 Rebuild / Repair ..........................................................................................................................24
8.4 Hose change...............................................................................................................................................25
8.4.1 Dismounting the hose .................................................................................................................25
8.4.2 Re-installing the hose, port anges, lubricant rell and tting the inspection window.................25
8.5 Ordering spare parts ...................................................................................................................................25
9. Troubleshooting ................................................................................................................................... 26
9.1 Pump malfunctions......................................................................................................................................26
10. List of Tables and Figures................................................................................................................... 29
11. Technicalspecications...................................................................................................................... 30
11.1 Pump specications ....................................................................................................................................30
11.2 Ambient conditions......................................................................................................................................30
11.3 Tightening torques ......................................................................................................................................30
11.4 Preservatives ..............................................................................................................................................30
11.5 Cleaning agents (after hose is removed) ....................................................................................................30
11.6 Lubricants....................................................................................................................................................30
11.7 Number of shims required...........................................................................................................................30
11.8 Rotor setting distance .................................................................................................................................30
12. Trademarks........................................................................................................................................... 31
13. Document History ................................................................................................................................ 31
Table of Contents

5 | PageVersion 01
© Verder Liquids B.V
Dura 55 series - Operating manual
Original instructions (en)
1. Declaration of Conformity
We,
VERDER Ltd., Unit 3 California Drive, Castleford
hereby declare that the following machine adheres to the relevant EC directives detailed below:
Designation
EC directives:
Applicable harmonized standards:
The pumps, to which this declaration refers, may only be put into operation after they have been installed in the
way prescribed by the manufacturer and, as the case may be, after the complete system of which these pumps
form part, has been made to full the requirements of Machinery Directive 2006/42/EC.
EC declaration of conformity according to machinery directive, appendix II A
Manufacturer
VERDER Ltd.
Unit 3 California Drive
Castleford
WF10 5QH
UK
Authorised Representative Established in EU
(in accordance with Article 4, Regulation (EU) 2019/1020)
Verder Liquids B.V
Utrechtseweg 4a
3451 GG Utrecht
Netherlands
Company Stamp / Signature:
Anthony Beckwith
Head of Engineering
Paul Storr
Head of Quality
Date: 14/ 02/ 2022 Company Stamp / Signature:
Dura 55
Dura 55HF
• BS EN ISO 12100:2010 - Safety of machinery - General principles for design - Risk assessment and risk
reduction
• Machinery Directive (2006/42/EC)
• Low-voltage Directive (2014/35/EU)
• RoHS Directive (2011/65/EU) and Delegated Directive (2015/863/EU)
(EC)

6 | PageVersion 01
© Verder Liquids B.V
Dura 55 series - Operating manual
Original instructions (en)
Manufacturer VERDER Ltd.
Unit 3 California Drive
Castleford
WF10 5QH
UK
Company Stamp / Signature:
Anthony Beckwith
Head of Engineering
Paul Storr
Head of Quality
Date: 14/ 02/ 2022 Company Stamp / Signature:
The following designated standard(s) has been applied:
The pumps, to which this declaration refers, may only be put into operation after they have been installed in the
way prescribed by the manufacturer and, as the case may be, after the complete system of which these pumps
form part, has been made to full the requirements of The Supply of Machinery (Safety) Regulations 2008.
• Supply of Machinery (Safety) Regulations 2008
• The Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment
Regulations 2012
• Electrical Equipment (Safety) Regulations 2016
• BS EN ISO 12100:2010 - Safety of machinery - General principles for design - Risk assessment and risk
reduction
Declaration of Conformity (UK)
In accordance with the UK Supply of Machinery (Safety) Regulations 2008, No 1597 ANNEX II, Part I,
Section B
We,
VERDER Ltd., Unit 3 California Drive, Castleford
hereby declare that the following machine adheres to the relevant UK legislation detailed below:
Designation
Dura 55
Dura 55HF
UK Legislation:

7 | PageVersion 01
© Verder Liquids B.V
Dura 55 series - Operating manual
Original instructions (en)
2. About This Document
The Verderex Dura 55 series (D55/D55HF) is a range of peristaltic pumps which have been developed according to the latest
technology and subject to continuous quality control. These operating instructions are intended to facilitate familiarisation with the
pump and its designed use. This manual will act as a guide for operating the pump. You are advised to follow these guidelines to
operate the pump correctly. These operating instructions do not take local regulations into account. The operator must ensure that such
regulations are strictly observed by all, including the personnel responsible for installation.
2.1 Target groups
Target Groups Duty
Operating Company XKeep this manual available at the operating site of the pump.
XEnsure that personnel read and follow the instructions in this
manual and any other applicable documents, especially all safety
instructions and warnings.
XObserve any additional rules and regulations referring to the
system.
Qualied personnel, tter XRead, observe and follow this manual and the other applicable
documents, especially all safety instructions and warnings.
Table 1. - Target groups
2.2 Warnings and symbols
Warning Risk Level Consequences of disregard
DANGER
Immediate risk Death, serious bodily harm
WARNING
Potential acute risk Death, serious bodily harm
CAUTION
Potential hazardous situation Potential damage to the pump
Note
For information Possible incorrect use/
maintenance of pump
Table 2. - Warnings used in the manual
Symbol Meaning
Safety warning sign in accordance with DIN 4844 - W9
XTake note of all information highlighted by the safety warning sign
and follow the instructions to avoid injury or death.
XInstruction
1., 2., Multiple-step instructions
Checklist
gCross-reference
Information
Table 3. - Symbols used in the manual

8 | PageVersion 01
© Verder Liquids B.V
Dura 55 series - Operating manual
Original instructions (en)
3. Safety
The manufacturer does not accept any liability
for damage resulting from disregard of this
documentation.
3.1 Intended use
XOnly use the pump to handle compatible uids as
recommended by the manufacturer (g11. Technical
specications).
XAdhere to the operating limits.
XConsult the manufacturer regarding any other use of the
pump.
XPumps delivered without a motor must be tted with a
motor in accordance with the provisions of EC Machinery
Directive 2006/42/EC.
Prevention of obvious misuse (examples)
XNote the operating limits of the pump with regard to
temperature, pressure, ow rate and motor speed (g11.
Technical specications).
XDo not operate the pump with any inlet/outlet valves
closed
XOnly install the pump as recommended in this manual.
For example, the following are not allowed:
– Installing the pump without proper support.
– Installation in the immediate vicinity of extreme hot or
cold sources.
3.2 General safety instructions
Observe the following regulations before carrying
out any work.
3.2.1 Product safety
• These operating instructions contain fundamental
information which must be complied with during
installation, operation and maintenance. Therefore, this
operating manual must be read and understood both by the
installing personnel and the responsible trained personnel
/ operators prior to installation and commissioning, and it
must always be kept easily accessible within the operating
premises of the machine.
• Not only must the general safety instructions laid down
in this chapter on “Safety” be complied with, but also the
safety instructions outlined under specic headings.
• Operate the pump only if it and all associated systems are
in good functional condition.
• Only use the pump as intended, fully aware of safety and
risk factors involved and the instructions in this manual.
• Keep this manual and all other applicable documents
complete, legible and accessible to personnel at all times.
• Refrain from any procedure or action that would pose a risk
to personnel or third parties.
• In the event of any safety-relevant faults, shut down the
pump immediately and have the malfunction corrected by
qualied personnel.
• The installation of the pump must comply with the
requirements of installation given in this manual and any
local, national or regional health and safety regulations.
3.2.2 Obligation of the operating company
Safety-conscious operation
• Ensure that the following safety aspects are
observed and monitored:
– Adherence to intended use
– Statutory or other safety and accident-prevention
regulations
– Safety regulations governing the handling of
hazardous substances if applicable
– Applicable standards and guidelines in the country
where the pump is operated
• Make personal protective equipment available pertinent to
operation of the pump.
Qualiedpersonnel
• Ensure that all personnel tasked with work on the pump
have read and understood this manual and all other
applicable documents, including the safety,
maintenance and repair information, prior to use or
installation of the pump.
• Organize responsibilities, areas of competence and
the supervision of personnel.
• Have all work carried out by specialist technicians
only.
• Ensure that trainee personnel are under the
supervision of specialist technicians at all times when
working with the pump.
Safety equipment
Provide the following safety equipment and verify its
functionality:
• For hot, cold and moving parts: safety guarding should be
provided by the operating company.
• For potential build-up of electrostatic charge: ensure
appropriate grounding if and when required.
Warranty
The warranty is void if the customer fails to follow any
Instruction, Warning or Caution in this document. Verder has
made every e󰀨ort to illustrate and describe the product in this
document. Such illustrations and descriptions are however,
for the sole purpose of identication and do not express or
imply a warranty that the products are merchantable or t for a
particular purpose, or that the products will necessarily conform
to the illustration or descriptions.
Obtain the manufacturer’s approval prior to carrying out any
modications, repairs or alterations during the warranty period.
Only use genuine parts or parts that have been approved by
the manufacturer.
For further details regarding warranty, refer to terms and
conditions.

9 | PageVersion 01
© Verder Liquids B.V
Dura 55 series - Operating manual
Original instructions (en)
3.2.3 Obligation of personnel
It is imperative that the instructions contained in this
manual are complied with by the operating personnel
at all times.
XPump and associated components:
– Do not lean or step on them or use as climbing aid
– Do not use them to support boards, ramps or beams
– Do not use them as a xing point for winches or
supports
– Do not de-ice using gas burners or similar tools
XDo not remove the safety guarding for hot, cold or moving
parts during operation.
XReinstall the safety equipment on the pump as required
by regulations after any repair / maintenance work on the
pump.
3.3 Specichazards
3.3.1 Hazardouspumpedliquids
Follow the statutory safety regulations when handling hazardous
pumped liquids (e.g., hot, ammable, poisonous or potentially
harmful).
Use appropriate Personal Protective Equipment when carrying
out any work on the pump.
3.3.2 Sharp edges
Pump parts, such as the shims and impellers, can be sharp
– Use protective gloves when carrying out any work on
the pump
3.3.3 ATEX environment
Failure to implement the necessary safety procedures and
failure to disclose the intended use of a pump within an explosive
atmosphere as laid down in latest EC Atex Directive 2014/34/
EU will void all warranty for the product. (Refer warranty terms
and conditions for more details).
Verder shall not be liable for any injuries, losses or damages
including, but not limited to any personal injuries, anticipated
or lost prots, incidental damages, consequential damages,
costs, time charges, or other damages or losses, in connection
with the instrument, its use or any replacement parts if the
customer fails to follow any Instruction, Warning or Caution in
this document.

10 | PageVersion 01
© Verder Liquids B.V
Dura 55 series - Operating manual
Original instructions (en)
4. Transport, Storage and
Disposal
4.1 Transport
Always transport the pump in a stable position and
ensure that the pump is securely attached to the pallet.
4.1.1 Unpacking and inspection on delivery
1. Report any transport damage to the manufacturer/
distributor immediately.
2. Retain the pallet if any further transport is required.
4.1.2 Lifting
DANGER
Death or crushing of limbs can be caused by falling loads!
1. Use lifting gear appropriate for the total weight to be
transported.
2. Make sure the pump and accessories are lifted and moved
by qualied lifting personnel equipped with suitable lifting
gear.
3. Fasten the lifting gear to the lifting eye as shown in the
following illustration.
4. Do not stand under suspended loads.
Figure 1. - Fastening lifting gear to pump
4.2 Storage conditions
1. Make sure the storage location meets the following
conditions:
– Dry, humidity not to exceed 85%, non-condensing
– Out of direct sunlight
– Frost-free; temperature range -5° to +45°C
– Vibration-free
– Dust-free
2. Depending on these conditions, it may be advisable to
place a moisture-absorbing product, such as Silica gel,
inside the pump’s housing or to coat the pump’s inner
surfaces with moisture-repelling oil, such as WD40, whilst
the pump is stored.
3. Hoses should be stored as supplied in their wrapper and
should be stored away from direct sunlight, at without any
bends or kinks and at room temperature, with end caps
tted.
4. Lubricants should be stored under normal warehouse
conditions with their caps securely fastened.
5. Gearboxes may require intermittent attention as indicated
by the gearbox manufacturer’s recommendations.
4.3 Interim storage after using the
pump
XThe hose should be removed from the pump.
XThe pump housing lubricant should be drained.
XThe pump housing should be washed out, allowed to dry
and any external build-up of product removed.
4.4 Interim storage before using the
pump
CAUTION
Pump damage caused by interim storage!
XAllow the pump to reach ambient temperature before
use.
XPlease observe the storage recommendations and use
by dates which apply to hose you may wish to bring into
service after storage.

11 | PageVersion 01
© Verder Liquids B.V
Dura 55 series - Operating manual
Original instructions (en)
4.5 Disposal
With prolonged use, pump parts can be contaminated
by hazardous pumped liquids to such an extent that cleaning
may be insu󰀩cient.
WARNING
Risk of poisoning and environmental damage by the
pumped liquid or oil!
XUse suitable personal protective equipment when
carrying out any work on the pump.
XPrior to disposal of the pump:
– Drain and dispose the lubricant in accordance with
local regulations.
– Collect and dispose of any leaking pumped liquid or
oil in accordance with local regulations.
– Neutralize residues of pumped liquid in the pump.
XDispose of the pump and associated parts in accordance
with local regulations.
5. Layout and Function
The medium to be pumped does not come into contact
with any moving parts and is totally contained within the
hose. A rotor passes along the length of the hose,
compressing it. This motion forces the contents of the
hose directly in front of the rotor to move forward along
the length of the hose in a ‘positive displacement’
peristaltic movement. In the wake of the rotor’s
compressing action, the natural elasticity of the polymer
reinforced rubber forces the hose to open and regain its
round prole, creating suction pressure, which recharges
the pump.
5.1 Design details
Verderex Dura 55 series is a twin lobe, single rotor,
peristaltic pump with quick-t port ange design which
clamps and seals in one easy movement to speed up
hose replacement.
5.2 Labelling
5.2.1 Name plate
Figure 2. - Name plate
1. Pump Type
2. Serial Number
3. Year of Manufacture
When requesting spares, the model and serial number
should always be quoted.
1. 2. 3.

12 | PageVersion 01
© Verder Liquids B.V
Dura 55 series - Operating manual
Original instructions (en)
5.3 Layout
Figure 3. - Layout Dura 55 (Generic View)
5.4 Bearings and lubrication
XPump: To be lled at installation with appropriate lubricant
if not supplied pre-lled (g11. Technical specications).
XBearings are sealed units and need no additional
lubricant.
1
3
5
8
2
4
6 7
10
9
12
13 14 15
1 Inspection Window
2 Inspection Window Gasket
3 Front Cover
4 Front Cover O-Ring
5 Rotor Mounting Bush
6 Shims
7 Rotor Shoe
8 Rotor
9 Hose
10 Seal Kit and Bearing 1)
11 Pump Housing
12 Clamp Ring
13 Port Flange
14 ¼ Turn Flange
15 Frames
11
1) Applies to Dura MKIII 55 & 55HF only.

13 | PageVersion 01
© Verder Liquids B.V
Dura 55 series - Operating manual
Original instructions (en)
6. Installation and Connection
CAUTION
Material damage due to unauthorized modication on
pump!
XUnauthorized modication will invalidate the warranty.
6.1 Preparing for installation
6.1.1 Checking the ambient conditions
1. Make sure that the operating conditions are complied
with (g 11. Technical specications)
2. Make sure the required ambient conditions are fullled
(g11. Technical specications)
6.1.2 Preparing the installation site
XEnsure the installation site meets the following
conditions:
– Pump is freely accessible from all sides.
– Su󰀩cient space is available for the installation/
removal of the pipes and for maintenance and
repair work, especially for the removal and
installation of the hose.
XThe pump and drive unit must not be installed in direct
sunlight or exposed to rain without suitable shade cover.
6.1.3 Preparing the foundation and surface
XMake sure the foundation and surface meet the
following conditions:
– Level
– Clean (no oil, dust or other impurities)
– Capable of bearing the weight of the pump and all
operating forces
– Ensure the pump is stable and cannot tip over
– Concrete foundation: Standard concrete strong
enough to support the pump under load.
6.2 Installation at site
1. Lift the pump. (g4.1.2 Lifting)
2. Put the pump down at the installation site.
3. Bolt the pump down; use all 4 holes.

14 | PageVersion 01
© Verder Liquids B.V
Dura 55 series - Operating manual
Original instructions (en)
6.3 Planning the pipes
6.3.1 Specifying supports and ange
connections
1. When planning pipe runs take every possible operating
condition into account:
– Cold/warm medium
– Empty/full
– Unpressurized/pressurized
– Positional change of the anges
2. Ensure that the pipe supports are designed to accommodate
any movement from environmental or pressure imposed
forces.
6.3.2 Specifying nominal diameters
Keep the ow resistance in the pipes as low as possible.
Pipework immediately connected to both inlet and outlet
port of the pump should be straight runs for at
least 1 metre.
Ensure that nominal pipe diameter is at least 1.5 times
nominal pump-hose diameter to reduce pulsation.
6.3.3 Specifying pipe lengths
1. Keep pipework as short and direct as possible.
2. To allow easy access when changing hoses, include
a short, removable section adjacent to the port
anges.
6.3.4 Optimizingcross-sectionofpipework
1. Avoid bending radii of less than 10r
(r - the radii of nominal piping).
2. Avoid abrupt changes of cross-section along the piping.
6.3.5 Providing safety and control devices
(recommended)
Makingprovisionsforisolatingandshuttingo󰀨pipes
For maintenance and repair work.
XProvide shut-o󰀨 valves in the suction and discharge lines.
Allowing safe removal of product
XInclude drainage taps in suction and discharge lines at
the lowest point.
Dos Don’ts
1. Short pipe run to
suction side
Long pipe run to suction
side
2. Reduced Joints/Bends Multiple Joints/Bends
3. Connecting pipe with
diameter 1.5 times pump
hose diameter
Pipe ID 1.5 times hose ID
Connecting pipe with
smaller than pump hose
diameter
Pipe ID < pump hose ID
4. Pulsation dampener
connected close
to the pump
Pulsation Dampener
Bellows
Pulsation dampener
connected away from
pump
10% loss in dampener
e󰀩ciency for every meter
Table 4. - Dos and don’ts

15 | PageVersion 01
© Verder Liquids B.V
Dura 55 series - Operating manual
Original instructions (en)
6.4 Electrical connection
DANGER
Risk to health due to electric shock!
XAll electrical work must be carried out by qualied
electricians.
Death or crushing of limbs caused by falling loads!
XUse lifting gear appropriate for the total weight to be
transported.
XDo not stand under suspended loads. Ensure the travel
plug is removed and disposed correctly before
the motor and gearbox is attached to the pump.
6.4.1 Installing the motor and gearbox
(where not supplied)
Note
Bare shaft pumps are supplied with a back-plate support.
Please make sure the back-plate support is removed before
installing the gearbox and motor.
1. Remove the back-plate support
Figure 4. - Removing the back plate support
2. Attach the key to gearbox shaft.
3. Apply anti seize grease to the gearbox shaft.
4. Attach the gearbox to the pump housing.
5. Fit the eight M10 bolts to fasten the gearbox to the pump
housing.
6. Use a torque wrench to apply tightening torque
(g11. Technical specications).
Back-plate support
Figure 5. - Installing the gearbox
7. Apply anti seize grease to the motor shaft.
8. Attach the motor to the gearbox.
9. Use a torque wrench to apply tightening torque (g11.
Technical specications).
Figure 6. - Installing the motor
6.4.2 Connecting to power supply
1. Connect motor to the rated power supply. Ensure the
correct gland is used and that the earth connection is made
and secured.
2. Wiring instructions are available within the motor junction
box.
3. Run the pump slowly to ensure correct rotation.
For more information on wiring the motor please refer to the
relevant motor manual.

16 | PageVersion 01
© Verder Liquids B.V
Dura 55 series - Operating manual
Original instructions (en)
6.4.3 Shimming
The pump must be shimmed for the required discharge
pressure with the following procedure (g11. Technical
specications).
1. Rotate the pump so that a rotor shoe is visible through the
inspection window.
2. Remove the inspection window and gasket. Leave the
bolts on the inspection window for reassembly.
3. Loosen the shoe bolt.
4. Remove any existing shims.
5. Replace with correct number of shims for the required
pressure (g11. Technical specications).
6. Tighten the shoe bolt (g11. Technical specications)
7. Repeat with the other rotor shoe.
8. Ensure the lubricant level is correct. (g11. Technical
specications)
9. Replace the window and gasket ensuring it is tted the
correct way with the bolts (g6.7.1 Fitting the inspection
window).
Figure 7. - Shimming
6.5 Installing the hose
Connect the motor to the power supply and run the pump
slowly to ensure correct connection.
Figure 8. - Installing the hose
1. Lubricate the hose generously with Verderlube/Verdersil.
2. Insert the hose into the lower port.
3. Run the pump forward and stop when the hose protrudes
from the other end by about 30mm.
CAUTION
Ensure the hose is installed as indicated in 6.6 Flange assembly.

17 | PageVersion 01
© Verder Liquids B.V
Dura 55 series - Operating manual
Original instructions (en)
6.6 Flange assembly
6.6.1 Port ange assembly without
insert
CAUTION
Ensure the hose is installed as indicated in 6.6.3 Hose
and ange assembly.
1. Insert the clamp ring over the hose with the large
diameter towards the pump and ensure that the
hose is protruding 5 to 10 mm past the clamp ring.
Figure 9. - Clamp ring inserted
2. Fit the O-ring to the port ange.
3. Apply some lubricant compatible with the pumped
media to the port ange.
4. Make sure the O-Ring is in place in the face
groove and push the port ange into the hose
together.
5. Install the 4 bolts.
6. Tighten the bolts in a 1–3–4–2 sequence until
the ange is evenly tted. All 4 bolts should be
tted to each ange to avoid compromising the
performance of the pump.
7. Ensure that the hose can be seen only through
the drain port on the port ange (Figure 12).
8. Run the pump forward and stop when the hose is
protruding 30 mm from the pump housing ange
face. (Figure 10).
9. Repeat steps 1 - 6 to complete assembly.
10. Fit the ¼ turn ange connector to both ports.
6.6.2 Port ange assembly with
insert
1. Load the insert into the port ange using either
the clamp tool or two G clamps.
2. Fit the ange to the suction port by holding on to
the ange-insert unit, pushing it in together.
3. Repeat steps 1 - 9 using “6.6.3.2 Port ange
assembly with insert” to complete assembly.
Clamp Ring
Pump Housing
Flange Face
5 to 10 mm
6.6.3 Hoseandangeassembly
6.6.3.1 Portangeassemblywith-
out insert
6.6.3.2 Portangeassemblywith
insert
Install the hose in position and protruding
30 mm from the pump housing ange
face (the side through which the hose
had been inserted).
Figure 10. - Port ange without insert
Hose is in position and protruding 30
mm from the pump housing ange face
(the side through which the hose had
been inserted).
Figure 11. - Port ange with insert
Figure 12. - Drain port without insert Figure 13. - Drain port with insert
Figure 14. - Assembled without insert Figure 15. - Assembled with insert
30 mm
the hose is protruding
5 to 10 mm past the
clamp ring
30 mm
the hose is protruding
5 to 10 mm past the
clamp ring
Drain port Drain port

18 | PageVersion 01
© Verder Liquids B.V
Dura 55 series - Operating manual
Original instructions (en)
6.7 Filling the pump with lubricant
Safety data sheets for both Verderlube and Verdersil are
available from the manufacturer for compatibility check.
1. Provide a suitable container to collect spilt lubricant.
2. Ensure compatibility of lubricant with the pumped liquid.
3. Fill the pump casing with lubricant to the lowest bolt hole of
the inspection window (gFigure 16).
Figure 16. - Filling the pump with lubricant
6.7.1 Fitting the inspection window
1. Fit M6 cap head bolts with washers into the window. The
window is threaded to make bolts captive and counter
bored on the back face.
2. Mount the gasket on to the bolts.
3. Mount the window unit, with the bolts and gasket, over the
front cover, aligned as shown in Figure 17.
4. Nip the bolts down in sequence. Ensure that the bolts are
not over-tightened. (g11. Technical specications)
You can see the gasket pressing against the window as the
bolts clamping force takes e󰀨ect.
Figure 17. - Fitting the inspection window
6.8 Connecting the pipes
Note
Contamination of pumped media due to impurities in the
pump!
XCare should be taken to avoid ingress of contaminants
into the pumped media.
Clean all piping parts and ttings prior to assembly.
Ensure that the ange seal do not protrude inwards
occluding the ow path.
Remove ange covers on both the suction and
discharge side prior to installation.
6.8.1 Installing the piping
1. Check all fasteners are tightened (g11. Technical
specications).
2. Ensure that the 1/4 turn ange is correctly indexed.
3. Remove the transport and sealing covers from the pump.
4. Before connecting any piping to the pump; Ensure that
the hose is properly secured by running the pump dry for
10–20 revolutions in both the directions.
5. Run the pipes in a continuous upward or downward slope
to avoid air pockets.
6. Connect the piping.
7. Make sure that the nozzle loadings on anges are not
exceeded.
Figure 18. - Nozzle loadings on anges
8. Consider the maximum nozzle loadings on anges in the
following table:
Pump Type MaximumNozzleLoadings(N)
F1 F2 F3
Dura 55/55HF 1500 N 1000 N 1000 N
Table 5. - Maximum nozzle loadings on anges

19 | PageVersion 01
© Verder Liquids B.V
Dura 55 series - Operating manual
Original instructions (en)
7. Operation
7.1 Pre-commissioning the pump
7.1.1 Checking the direction of rotation
with dry pump
Ensure the pump has lubricant in it.
Switch the motor on and check the direction of rotation;
then switch o󰀨 immediately.
If the direction of rotation is di󰀨erent: swap two of the
phases (*check with electrician)
7.1.2 Starting the Pump
DANGER
Risk of injury and poisoning due to pumped liquid
spraying out!
XUse personal protective equipment when carrying out any
work on the pump.
Equipment damage due to excess pressure!
XDo not operate the pump with the discharge-side tting
closed.
XOperate the pump only inside the tolerances specied
by the manufacturer (g11. Technical specications).
WARNING
Risk of injury and poisoning due to hazardous pumped
liquids!
XSafely collect any leaking pumped liquid and dispose
of it in accordance with environmental rules and
requirements.
Checklist:
Pump set up and connected properly.
Motor set up and connected properly.
All connections stress-free and sealed.
Pump housing lubricant level correct
(g6.7 Filling the pump with lubricant).
All safety equipment installed and tested for functionality.
1. Close all drainage taps.
2. Open the suction-side and the discharge-side ttings.
3. Switch ON the motor and make sure it is running smoothly.
4. Run the pump, ushing with water rst (cold commissioning)
to check for leaks.
5. Verify that neither the pump nor the pipe connections are
leaking.
6. Perform a second ush by running the pump, 10–20
revolutions with pumped liquid, to remove residue and
water inside the pump.
7.1.3 Switching OFF the pump
WARNING
Risk of injury due to hot pump parts!
XUse personal protective equipment when carrying out any
work on the pump.
Note
Risk of dead heading and hose burst due to closed suction
or discharge!
XKeep the suction and discharge side ttings opened till
the rotor has come to a complete stop.
Equipment damage due to sediments!
XIf the pumped liquid crystallizes, polymerizes or solidies:
– Flush pump
– Make sure that the ushing liquid is compatible
with the pumped liquid.
1. If necessary: Flush and empty the pump.
2. Switch o󰀨 power to the motor.
3. Close the discharge side tting.
4. Check all tie bolts and tighten them if necessary (only
after putting the pump into service for the rst time).

20 | PageVersion 01
© Verder Liquids B.V
Dura 55 series - Operating manual
Original instructions (en)
7.2 Commissioning the pump
7.2.1 Switching ON the Pump
DANGER
Risk of injury due to running pump!
XDo not touch the moving parts of a running pump.
XDo not carry out any repair/ maintenance work on the
running pump.
XAllow the pump to cool down completely before starting
any work on the unit.
Risk of injury and poisoning due to pumped liquid spraying
out!
XUse personal protective equipment when carrying out any
work on the pump.
Note
Risk of pulsation when throttling down the suction ow
rate!
XFully open the suction-side tting and DO NOT use it to
adjust the ow as this could damage the hose.
Checklist:
Pump pre-commissioned (g7.1 Pre-commissioning the
pump).
Pump prepared and lled.
1. Open the suction-side and the discharge-side ttings.
2. Switch on the motor and make sure it is running smoothly.
7.2.2 Switching OFF the pump
(refer to 7.1.3)
WARNING
Risk of injury due to hot pump parts!
XUse personal protective equipment when carrying out
any work on the pump.
Note
Damage to hose due to sediments!
XIf the pumped liquid crystallizes, polymerizes or solidies:
– Flush the hose
– Make sure that the ushing liquid is compatible with
the pumped liquid.
7.3 Shutting down the pump
XTake the following measures whenever the pump is shut
down:
Pump is... Measure
shut down XTake measures according to the
pumped liquid (gTable 7. - Measures
depending on the behaviour of the
pumped liquid).
dismounted XIsolate the motor from its power supply
and secure it against unauthorized
switch-on.
put into
storage
XFollow the storage instructions (g4.2
Storage conditions)
Table 6. - Measures to be taken if pump is shut down
Behaviour of
the Pumped
Liquid
Duration of Shutdown (Depending on
Process)
Short Long
Crystallized or
polymerized,
solids
sedimenting
XFlush the
pump
XFlush the pump,
remove the hose
Solidifying non-
corrosive
XHeat up or
empty the
pump
XEmpty the pump
Solidifying
corrosive
XHeat up or
empty the
pump
XEmpty the pump
XTreat the pump
with preservative
Liquid, non-
corrosive
- -
Liquid, corrosive XEmpty the
pump
XEmpty the pump
XTreat the pump
with preservative
Table 7. - Measures depending on the behaviour of the pumped liquid
7.4 Start-up following a shutdown
period
1. After a prolonged shutdown period, re-commission the
pump as follows:
– Replace the seals
– Install or change hose (g6.5 Installing the hose).
2. Carry out all steps as for the initial start-up (g7.1 Pre-
commissioning the pump).
7.5 Operating the standby pump
Checklist:
Standby pump is lled with lubricant (g6.7 Filling the
pump with lubricant).
XOperate the standby pump at least once a week to avoid
formation of permanent dents/setting on the hose.