Verderflex Dura MK IV 05 User manual

Peristaltic Industrial Hose Pump
Operating Manual Dura
5, 7, 10, 15, 25, 35
Version 2.6v-12/2022
Original instructions (en)

2 | Page
Version 2.6v-12/2022
© Verder Liquids B.V
Dura 5 - 35 series - Operating manual
Original instructions (en)
Version 2.6v-12/2022 Dura
5, 7, 10, 15, 25, 35
The information in this document is essential for the safe operation of Verderex® Dura pumps.
This document must be read and understood thoroughly prior to installation of unit, electrical
connection and commissioning.

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Version 2.6v-12/2022
© Verder Liquids B.V
Dura 5 - 35 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 used in this manual............................................................................................................... 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
5.3 Layout ...................................................................................................................................................................... 12
5.3.1 Dura MK IV 5, 7 and 10 Exploded View................................................................................................... 12
5.3.2 Dura MK III 15, 25 and 35 Exploded View............................................................................................... 13
5.4 Bearings and Lubrication ......................................................................................................................................... 13
6. Installation and Connection.............................................................................................................................14
6.1 Preparing for Installation .......................................................................................................................................... 14
6.1.1 Checking the Ambient Conditions............................................................................................................ 14
6.1.2 Preparing the Installation Site.................................................................................................................. 14
6.1.3 Preparing the Foundation and Surface.................................................................................................... 14
6.2 Installation at Site..................................................................................................................................................... 14
6.3 Planning the Pipes ................................................................................................................................................... 15
6.3.1 Specifying Supports and Flange Connections......................................................................................... 15
6.3.2 Specifying Nominal Diameters................................................................................................................. 15
6.3.3 Specifying Pipe Lengths .......................................................................................................................... 15
6.3.4 Optimising Cross-Section of Pipe Work................................................................................................... 15
6.3.5 Providing Safety and Control Devices (recommended)........................................................................... 15
6.4 Electrical Connection ............................................................................................................................................... 16
6.4.1 Installing the Gear Motor Unit (where not supplied)................................................................................. 16
6.4.2 Connecting to Power Supply.................................................................................................................... 16
6.5 Installing the Hose.................................................................................................................................................... 16
6.6 Flange Assembly...................................................................................................................................................... 17
6.6.1 Solid Flange Assembly (Dura 5, 7, 10) .................................................................................................... 17
6.6.2 Split Flange Assembly (Dura 5, 7, 10) .................................................................................................... 17
6.6.3 Dura MK IV 5, 7, 10 - Hose and Flange Assembly .................................................................................. 17
Table of Contents

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Version 2.6v-12/2022
© Verder Liquids B.V
Dura 5 - 35 series - Operating manual
Original instructions (en)
6.6.4 Standard Port Flange Assembly (Dura 15, 25 and 35) ............................................................................18
6.6.5 Split Flange Assembly (Dura 15, 25 and 35) ...........................................................................................18
6.6.6 Dura MK III 15, 25 and 35- Hose and Flange Assembly..........................................................................18
6.7 Filling the Pump with Lubricant ................................................................................................................................19
6.7.1 Fitting the Inspection Window..................................................................................................................19
6.8 Connecting the Pipes...............................................................................................................................................19
6.8.1 Installing the Piping..................................................................................................................................19
7. Operation ..........................................................................................................................................................20
7.1 Pre-commissioning the Pump ..................................................................................................................................20
7.1.1 Checking the Direction of Rotation with Dry Pump..................................................................................20
7.1.2 Starting the Pump ....................................................................................................................................20
7.1.3 Switching OFF the Pump.........................................................................................................................20
7.2 Commissioning the Pump ........................................................................................................................................21
7.2.1 Switching ON the Pump...........................................................................................................................21
7.2.2 Switching OFF the Pump (Refer to g7.1.3) ...........................................................................................21
7.3 Shutting Down the Pump .........................................................................................................................................21
7.4 Start-up Following a Shutdown Period.....................................................................................................................21
7.5 Operating the Stand-by Pump..................................................................................................................................21
8. Inspection, Maintenance and Repair.............................................................................................................. 22
8.1 Inspection.................................................................................................................................................................22
8.2 Maintenance.............................................................................................................................................................22
8.2.1 Cleaning the Pump ..................................................................................................................................22
8.2.2 Cleaning Protocol for Hoses ....................................................................................................................22
8.2.3 Maintenance Schedule ............................................................................................................................24
8.3 Repair.......................................................................................................................................................................25
8.3.1 Preparations for Dismounting ..................................................................................................................25
8.3.2 Returning the Pump to the Manufacturer.................................................................................................25
8.3.3 Rebuild/Repair .........................................................................................................................................25
8.4 Hose Change ...........................................................................................................................................................26
8.4.1 Dismounting the Hose..............................................................................................................................26
8.4.2 Re-installing the Hose, Port Flanges, Lubricant Rell and Fitting the Inspection Window.......................26
8.5 Ordering Spare Parts ...............................................................................................................................................26
9. Troubleshooting ..............................................................................................................................................27
9.1 Pump malfunctions...................................................................................................................................................27
10. Listoftables&gures ....................................................................................................................................30
11. TechnicalSpecications ................................................................................................................................. 31
11.1 Pump Specications.................................................................................................................................................31
11.2 Standard Operating Conditions................................................................................................................................31
11.3 Tightening Torques...................................................................................................................................................31
11.4 Preservatives ...........................................................................................................................................................31
11.5 Cleaning Agents (after hose is removed).................................................................................................................31
11.6 Lubricants.................................................................................................................................................................31
11.7 Rotor Options...........................................................................................................................................................31
12. Trademarks.......................................................................................................................................................32
13. Document history.............................................................................................................................................32

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Version 2.6v-12/2022
© Verder Liquids B.V
Dura 5 - 35 series - Operating manual
Original instructions (en)
EC declaration of conformity according to machinery directive, appendix II A
We,
VERDER Ltd., Unit 3 California Drive, Castleford
hereby declare that the following machine adheres to the relevant EC directives detailed below:
Designation
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
Date: Company Stamp / Signature:
Anthony Beckwith
Head of Engineering
Company Stamp / Signature:
Paul Storr
Head of Quality
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.
14/ 02/ 2022
Dura MK IV 05
Dura MK IV 07
Dura MK IV 10
Dura MK III 15
Dura MK III 25
Dura MK III 35
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)1. Declaration of Conformity

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Version 2.6v-12/2022
© Verder Liquids B.V
Dura 5 - 35 series - Operating manual
Original instructions (en)
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
Manufacturer VERDER Ltd.
Unit 3 California Drive
Castleford
WF10 5QH
UK
Date: Company Stamp / Signature:
Anthony Beckwith
Head of Engineering
Company Stamp / Signature:
Paul Storr
Head of Quality
The following designated standard(s) has been applied:
UK Legislation:
BS EN ISO 12100:2010 - Safety of machinery - General principles for design - Risk assessment and risk reduction
Supply of Machinery (Safety) Regulations 2008
Electromagnetic Compatibility Regulations 2016
Electrical Equipment (Safety) Regulations 2016
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.
(UK)Declaration of Conformity
Dura MK IV 05
Dura MK IV 07
Dura MK IV 10
Dura MK III 15
Dura MK III 25
Dura MK III 35
14/ 02/ 2022

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Version 2.6v-12/2022
© Verder Liquids B.V
Dura 5 - 35 series - Operating manual
Original instructions (en)
2. About this Document
The Verderex Dura 05-35 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 used in this manual
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 this 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 this manual

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Version 2.6v-12/2022
© Verder Liquids B.V
Dura 5 - 35 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.

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Version 2.6v-12/2022
© Verder Liquids B.V
Dura 5 - 35 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
XFollow the statutory safety regulations when handling
hazardous pumped liquids (e.g. hot, ammable,
poisonous or potentially harmful).
XUse 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.

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Version 2.6v-12/2022
© Verder Liquids B.V
Dura 5 - 35 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. Where lifting eye is available, fasten the lifting gear to the
lifting eye as shown in the following illustration. The lifting
eye is available for Dura 15, 25 and 35 only.
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.

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Version 2.6v-12/2022
© Verder Liquids B.V
Dura 5 - 35 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 05-35 is a twin lobe, single rotor,
peristaltic pump with quick-t tapered 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.
2. 3.
1.

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Version 2.6v-12/2022
© Verder Liquids B.V
Dura 5 - 35 series - Operating manual
Original instructions (en)
Figure 3. - Dura MK IV 5, 7, 10 Exploded View (Generic View)
5.3 Layout
5.3.1 Dura MK IV 5, 7 and 10 Exploded View
1) Applies to Dura MKIV 5, 7, 10 only.(g 6.6.4 Standard Port Flange Assembly (Dura 15, 25 and 35))
1
3
5
6
2
4
11 7
9
12
8
10
14
13
1 Inspection Window
2 Inspection Window Gasket
3 Front Cover
4 O-Ring
5 Rotor
6 Shaft Assembly
7 Clamp Ring1)
8 Port Flange 1)
9 Frames
10 Filler Tube
11 Hose
12 Pump Housing
13 Gearbox with Adaptor Flange
14 Motor

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Version 2.6v-12/2022
© Verder Liquids B.V
Dura 5 - 35 series - Operating manual
Original instructions (en)
Figure 4. - Dura MK III 15, 25 and 35 Exploded View (Generic View)
5.3.2 Dura MK III 15, 25 and 35 Exploded View
1) For D35 use O-ring instead of gasket.
2) For D25 and D35 use polypropylene ller tube instead of copper ller tube.
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
2
4
11 7
10
12
13
914
6
8
1 Inspection Window
2 Inspection Window Gasket
3 Front Cover
4 O-Ring
5 Rotor
6 Shaft Assembly 1)
7 Clamp Ring
8 Port Flange
9 Frames
10 Filler Tube 2)
11 Hose
12 Pump Housing
13 Gearbox with Adaptor Flange
14 Motor

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Version 2.6v-12/2022
© Verder Liquids B.V
Dura 5 - 35 series - Operating manual
Original instructions (en)
6. Installation and Connection
CAUTION
Materialdamageduetounauthorisedmodicationon
pump!
XUnauthorised 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 (g11. 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. (g 4.1.2 Lifting)
2. Put the pump down at the installation site.
3. Bolt the pump down; use all 4 holes.

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Version 2.6v-12/2022
© Verder Liquids B.V
Dura 5 - 35 series - Operating manual
Original instructions (en)
6.3 Planning the Pipes
6.3.1 Specifying Supports and Flange
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.
Pipe work 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 pipe work 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 Optimising Cross-Section of Pipe
Work
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
Short pipe run to suction side Long pipe run to suction side
Reduced joints/ bends. Multiple joints/ bends
Connecting pipe with diameter 1.5x
pump diameter.
Connecting pipe with smaller than
pump hose diameter.
Pulsation dampener connected close
to the pump.
Pulsation dampener connected away
from pump.
10% loss in dampener e󰀩ciency for
every meter in length.
Table 4. - Do’s and don’ts

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Version 2.6v-12/2022
© Verder Liquids B.V
Dura 5 - 35 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.
XEnsure the travel plug is removed and disposed correctly
before the motor and gearbox is attached to the pump.
6.4.1 Installing the Gear Motor Unit (where
not supplied)
1. Lift the gear motor unit (GMU) on a sling.
2. Apply anti seize grease to the GMU shaft.
3. Align the GMU shaft and connect it to the pump housing.
4. Fit the four bolts to fasten the GMU to the pump housing
5. Use a torque wrench to apply tightening torque (g11.
Technical Specications).
Note
Before installing the GMU for D35 the additional rings must be
added.
Figure 5. - Installing the gear motor unit
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.
Figure 6. - Electrical connection
6.5 Installing the Hose
Connect the motor to the power supply and run the pump slowly
to ensure correct connection.
Figure 7. - 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 is protruding
10 mm for Dura 5 and 7 and 15 mm for Dura 10, 15 and 25
from the pump housing ange face.
4. For Dura 35, the EPDM hose material is ush with the pump
housing face, and 5mm for all the other hose materials.
CAUTION
Ensure the hose is installed as indicated in 6.6 Flange Assembly

17 | Page
Version 2.6v-12/2022
© Verder Liquids B.V
Dura 5 - 35 series - Operating manual
Original instructions (en)
6.6 Flange Assembly
6.6.1 Solid Flange Assembly (Dura 5, 7, 10)
Note
Dura MK IV 5, 7, 10 port ange assemblies have an additional
clamp ring. For insert or component temperature limits, please
check the datasheet.
CAUTION
Ensure the hose is installed as indicated in Table 5.
1. Insert the clamp ring over the hose and into the pump
housing with the large diameter towards the pump as far
as it allows.
Figure 8. - Dura 5, 7, 10 Clamp Ring Inserted
2. Apply some lubricant compatible with the pumped media to
the taper on the port ange.
3. Push the port ange into the hose.
4. Install the 4 bolts.
5. Tighten the bolts in a 1–3–4–2 sequence until the ange is
evenly tted.
6. Tighten all 4 bolts fully to clamp the hose and ensure that
the hose can be seen through the inspection hole in the
side of the port ange. (Figure 13)
7. Run the pump forward and stop when the hose is protruding
10 mm for Dura 5, 7, 10 from the pump housing ange
face. (Figure 11)
8. Repeat steps 1 - 6 to complete assembly.
6.6.2 Split Flange Assembly (Dura 5, 7, 10)
1. Attach the o-rings as shown in Figure 10 and then attach
the insert.
2. Repeat steps 1 - 8 from g6.6.3.2.
Clamp Ring
6.6.3Dura MK IV 5, 7, 10 - Hose and Flange Assembly
6.6.3.1 Solidangeassembly 6.6.3.2 Splitangeassembly
Attach the O-ring as shown below.
The solid ange has no insert.
Figure 9. - O-ring (no insert)
Attach the O-rings as shown below
then attach the insert.
Figure 10. - O-ring (with insert)
For Dura 5, 7 and 10, install the hose
in position and protruding 10 mm
from the pump housing ange face
(the side through which the hose had
been inserted).
Figure 11. - 10mm protrusion (solid
ange)
For Dura 5, 7 and 10, install the hose
in position and protruding 10 mm
from the pump housing ange face
(the side through which the hose had
been inserted).
Figure 12. - 10mm protrusion (split
ange)
Attach the plug to the inspection hole
after the hose is checked.
Figure 13. - Plug inspection hole
(solid ange)
Attach the plug to the inspection hole
after the hose is checked.
Figure 14. - Plug inspection hole (split
ange)
Table 5. - Dura 5, 7, 10 Hose and Flange Assembly(for information only)
10 mm
Dura 5, 7, 10
10 mm
Dura 5, 7, 10

18 | Page
Version 2.6v-12/2022
© Verder Liquids B.V
Dura 5 - 35 series - Operating manual
Original instructions (en)
6.6.4 Standard Port Flange Assembly
(Dura 15, 25 and 35)
Note
Dura MK III 15, 25 and 35 port ange assembly have
an additional clamp ring. For insert or component
temperature limits, please check the datasheet.
CAUTION
Ensure the hose is installed as indicated in Table 6
1. Insert the clamp ring over the hose and into the
pump housing with the taper towards the pump
and ensure that the large diameter of the clamp
ring is in line with the viewing aperture in the
pump housing.
Figure 15. -
Clamp Ring
Pump Housing
Flange Face
Aperture
of the Pump
Housing
Dura 15, 25 and 35 clamp ring inserted
2. Apply some lubricant compatible with the pumped
media to the taper on the port ange.
3. Push the port ange into the hose.
4. Install the 4 bolts.
5. Tighten the bolts in a 1–3–4–2 sequence until the
ange is evenly tted.
6. Tighten all 4 bolts fully to clamp the hose and
ensure that the hose can be seen through the
viewing aperture in the side of the pump housing.
7. Run the pump forward and stop when the hose is
protruding 15 mm for Dura 10, 15 and 25 from the
pump housing ange face. (Figure 16)
For Dura 35, the EPDM hose material is ush
with the pump housing face (Figure 18), and
5mm for all the other hose materials (Figure 20).
8. Repeat steps 1 - 6 to complete assembly.
6.6.5 Split Flange Assembly (Dura
15, 25 and 35)
1. Place both halves of the steel ange assembly
around the appropriate hose insert.
2. Fasten the halves together with the screws
provided, use a smear of grease on the screw
threads to help avoid seizure.
3. Repeat steps 1 - 8 from g6.6.6.2 to complete
assembly.
6.6.6Dura MK III 15, 25 and 35- Hose and Flange Assembly
6.6.6.1 Standard Port Flange Assembly 6.6.6.2 Split Flange Assembly
For Dura 15 and 25, install the hose in
position and protruding 15 mm from
the pump housing ange face (the
side through which the hose had been
inserted).
Figure 16. - 15mm protrusion (standard
port ange)
For Dura 15 and 25, the hose is in position
and protruding 15 mm from the pump
housing ange face (the side through
which the hose had been inserted).
Figure 17. - 15mm protrusion (split ange)
For Dura 35, the EPDM hose material is
ush with the pump housing face.
Figure 18. - Hose ush (standard port
ange)
For Dura 35, the EPDM hose material is
ush with the pump housing face.
Figure 19. - Hose ush (split ange)
For Dura 35, all the other hose materials
are in position and protruding 5 mm.
Figure 20. - 5mm protrusion (standard port
ange)
For Dura 35, all the other hose materials
are in position and protruding 5 mm.
Figure 21. - 5mm protrusion (split ange)
Table 6. - Dura 15, 25 and 35 Hose and Flange Assembly (for information only)
15 mm
Dura 15, 25
5 mm Dura 35 (other
hose materials)
Flush 0 to 5 mm outside
Dura 35 (EPDM hose
material)
15 mm
Dura 15, 25
Flush 0 to 5 mm outside
Dura 35 (EPDM hose
material)
5 mm Dura 35 (other
hose materials)

19 | Page
Version 2.6v-12/2022
© Verder Liquids B.V
Dura 5 - 35 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 (g11. Technical Specications).
Figure 22. - 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 inspection window, with the bolts and gasket,
over the front cover, aligned as shown in Figure 23.
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 23. - 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 24. - Nozzle loading on anges
8. Consider the maximum nozzle loadings on anges in the
following table:
Pump Type MaximumNozzleLoadings(N)
F1 F2 F3
Dura 5 600 N 300 N 300 N
Dura 7 600 N 300 N 300 N
Dura 10 600 N 300 N 300 N
Dura 15 600 N 300 N 300 N
Dura 25 660 N 500 N 500 N
Dura 35 660 N 600 N 600 N
Table 7. - Maximum nozzle loadings on anges

20 | Page
Version 2.6v-12/2022
© Verder Liquids B.V
Dura 5 - 35 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;
switch immediately o󰀨 again.
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 (g11. Technical
Specications).
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 suc-
tion 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).