Wright flow Cocept SQ General instructions

I NSTALLATION , O PERATION
A ND
M AINTENANCE M ANUAL
F OR T HE
R ANGE OF P UMPS

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INSTALLATION, OPERATION AND MAINTENANCE MANUAL
FOR THE CONCEPT SQ RANGE OF ROTARY LOBE PUMPS
1.0 SAFETY INFORMATION ___________________________________ 4
1.1 R ISK ASSESSMENT RELATING TO THE USE OF W RIGHT F LOW T ECHNOLOGIES
L IMITED . C ONCEPT SQ ROTARY LOBE PUMPS AND PUMP UNITS IN
POTENTIALLY EXPLOSIVE ATMOSPHERES .________________________ 7
2.0 INTRODUCTION__________________________________________ 8
2.1 G ENERAL ______________________________________________ 8
2.2 W RIGHT F LOW T ECHNOLOGIES L IMITED D ISTRIBUTORS _____________ 8
2.3 R ECEIPT AND S TORAGE ____________________________________ 8
2.4 C LEANING ______________________________________________ 8
2.5 P UMP M ODEL D ESIGNATION _________________________________ 9
2.5.1 ATEX I NFORMATION P LATE ________________________________ 10
2.5.2 E QUIPMENT G ROUPS & C ATEGORIES _________________________ 10
2.6 P UMP M ODEL AND S ERIAL N UMBER __________________________ 11
2.7 S TANDARD P UMP C OMPONENT T ERMS ________________________ 12
3.0 GENERAL______________________________________________ 13
3.1 C ONCEPT SQ R ANGE P UMPING P RINCIPLE _____________________ 13
3.2 C ONCEPT SQ R ANGE O PERATING P ARAMETERS _________________ 14
3.3 S YSTEM D ESIGN ________________________________________ 15
3.3.1 S YSTEM D ESIGN AND I NSTALLATION __________________________ 15
3.3.2 I NSTALLATIONS WITH CIP/SIP S YSTEMS _______________________ 18
3.4 S TART U P P ROCEDURE ___________________________________ 19
3.5 S HUTDOWN P ROCEDURE __________________________________ 20
3.6 R OUTINE M AINTENANCE ___________________________________ 20
3.7 H EATING AND C OOLING D EVICES ____________________________ 21
3.8 F RONT C OVER /R OTORCASE J OINT WITH F LUID B ARRIER ___________ 23
3.9 R OTORCASE P ORT C ONNECTIONS WITH F LUID B ARRIER ____________ 24
4.0 CONCEPT SQ DISMANTLING / ASSEMBLY __________________ 25
4.1 SQ1 S ERIES P UMPS - D ISMANTLING __________________________ 27
4.1.1 F RONT C OVER AND R OTOR R EMOVAL _________________________ 27
4.1.2 C ARTRIDGE R EMOVAL ____________________________________ 28
4.1.3 C ARTRIDGE D ISMANTLING _________________________________ 29
4.1.3.1 D RIVE S HAFT C ARTRIDGE D ISMANTLING _______________________ 29
4.1.3.2 L AY SHAFT C ARTRIDGE D ISMANTLING _________________________ 29
4.2 SQ1 S ERIES P UMPS - A SSEMBLY ____________________________ 30
4.2.1 C ARTRIDGE A SSEMBLY ___________________________________ 30
4.2.1.1 D RIVE S HAFT C ARTRIDGE A SSEMBLY _________________________ 30
4.2.1.2 L AY SHAFT C ARTRIDGE A SSEMBLY ___________________________ 32
4.2.2 C ARTRIDGE /M OUNTING P LATE /R OTORCASE A SSEMBLY ____________ 33
4.2.3 S ETTING R OTOR T IMING ___________________________________ 35
4.2.4 G EARBOX A SSEMBLY _____________________________________ 36
4.2.5 R OTOR A SSEMBLY AND C HECKING C LEARANCES _________________ 37
4.3 SQ 2, 3, 4 - D ISMANTLING _________________________________ 39
4.3.1 F RONT C OVER AND R OTOR R EMOVAL _________________________ 39

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4.3.2 C ARTRIDGE R EMOVAL ( AFTER COMPLETING 4.3.1)________________ 40
4.3.3 C ARTRIDGE D ISMANTLING _________________________________ 41
4.4 SQ 2, 3, 4 - A SSEMBLY ___________________________________ 42
4.4.1 C ARTRIDGE A SSEMBLY ___________________________________ 42
4.4.2 C ARTRIDGE TO R OTORCASE A SSEMBLY _______________________ 44
4.4.3 S ETTING R OTOR T IMING ___________________________________ 46
4.4.4 F INAL S ETTING OF C ARTRIDGE R OLLING T ORQUE ________________ 47
4.4.5 R OTOR A SSEMBLY AND S ETTING R OTOR C LEARANCES ____________ 48
4.4.6 G EARBOX C OVER A SSEMBLY _______________________________ 50
4.5 M ECHANICAL S EAL I NSTALLATION AND R EMOVAL _________________ 51
4.5.1 P ROCEDURES FOR I NSTALLING M ECHANICAL S EALS _______________ 51
4.5.2 S INGLE M ECHANICAL S EAL _________________________________ 52
4.5.3 S INGLE M ECHANICAL S EAL ( LOW - PRESSURE FLUSH / QUENCH ). ______ 57
4.5.4 D OUBLE M ECHANICAL S EAL ( HIGH - PRESSURE FLUSH ). _____________ 60
4.5.5 M ECHANICAL S EALS FOR Q UENCH OR F LUSH - A UXILIARY S ERVICES ___ 63
5.0 SPECIFICATIONS _______________________________________ 66
5.1 C LEARANCE C HART ______________________________________ 66
5.2 F IXINGS & T ORQUE S ETTINGS ______________________________ 67
5.3 L UBRICANTS ___________________________________________ 68
5.4 M ATERIAL S PECIFICATION . _________________________________ 68
5.5 C ONCEPT SQ R ANGE F OUNDATION D IMENSIONS AND W EIGHTS ______ 69
5.6 T YPICAL B ASIC P UMP B UILD ________________________________ 71
5.7 F AULT F INDING _________________________________________ 72
5.9 S ERVICE H ISTORY . ______________________________________ 74
5.10 T OOL L IST _____________________________________________ 75
5.11 N OTES _______________________________________________ 76

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1.0 Safety Information
INCORRECT INSTALLATION, OPERATION OR MAINTENANCE OF EQUIPMENT
MAY CAUSE SEVERE PERSONAL INJURY AND/OR EQUIPMENT DAMAGE AND
MAY INVALIDATE THE WARRANTY.
THIS INFORMATION MUST BE READ FULLY BEFORE COMMENCING
INSTALLATION, OPERATION OR MAINTENANCE AND MUST BE KEPT WITH
THE PUMP. SUITABLY TRAINED OR QUALIFIED PERSONS MUST UNDERTAKE
ALL INSTALLATION AND MAINTENANCE ONLY.
Safety instructions given in this
manual non-compliance with which
would affect safety are identified by
the symbol:
Safety instructions which shall be
considered for reasons of safe
operation of the pump or pump unit
and/or protection of the pump or
pump unit itself are marked:
DANGER
DO NOT OPERATE PUMP IF:
- THE FRONT COVER IS NOT INSTALLED CORRECTLY.
- ANY GUARDS ARE MISSING OR INCORRECTLY INSTALLED.
- THE SUCTION OR DISCHARGE PIPEWORK IS NOT CONNECTED.
DO NOT PLACE FINGERS ETC INTO THE PUMPING CHAMBER OR ITS
CONNECTION PORTS OR INTO ANY PART OF THE GEARBOX IF THERE
IS ANY POSSIBILITY OF THE PUMP SHAFTS BEING ROTATED. SEVERE
INJURY WILL OCCUR.
DO NOT exceed the pumps rated pressure, speed, and temperature, or
change the system/duty parameters from those for which the pump was
originally supplied, without confirming its suitability for the new duty. Running of
the pump outside of its operation envelope can cause mechanical contact in
the pump head, excessive heat and can represent a serious risk to health and
safety.
Installation and operation of the pump must always comply with health and
safety regulations.
A device must be incorporated into the system or drive to prevent the pump
exceeding its stated duty pressure. It must be suitable for both directions of
pump rotation where applicable. Do not allow pump to operate with a
closed/blocked discharge unless a pressure relief device is incorporated.
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The mounting of the pump or pump unit should be solid and stable. Pump
orientation must be considered in relation to drainage requirements. Once
mounted, shaft drive elements must be checked for correct alignment. Rotate
pump shaft by at least one full revolution to ensure smoothness of operation.
Incorrect alignment will produce excessive loading and will create high
temperatures and increased noise emissions. It may also be necessary to
earth the pump to avoid the build up of a potential charge difference that could
cause a spark
The installation must allow safe routine maintenance and inspection (to
replenish lubricants, check for leakage, monitor pressures, etc) and provide
adequate ventilation necessary to prevent overheating.
Fill with the recommended grades and quantities of lubricant see section 3.4.
Beware of over/under filling the gearbox as this could cause the pump to
overheat and mechanical damage to occur.
Before operating the pump, ensure that it and all parts of the system to which it
is connected are clean and free from debris and that all valves in the suction
and discharge pipelines are fully opened. Ensure that all pipe work connecting
to the pump is fully supported and aligned with its relevant connections.
Misalignment and/or excess loads will cause severe pump damage. This could
result in unexpected mechanical contact in the pump head and has the
potential to be a source of ignition.
Ensure that pump rotation is correct for the desired direction of flow; (see
section 3.4)
Do not install the pump into a system where it will run dry (i.e. without a supply
of pumped media) unless it is equipped with a flushed shaft seal arrangement
complete with a fully operational flushing system. Mechanical seals require a
thin fluid film to lubricate the seal faces. Dry running can cause excessive heat
and seal failure.
Install pressure gauges/sensors next to the pump suction and discharge
connections to monitor pressures.
Caution must be taken when lifting the pump. Suitable lifting devices should be
used as appropriate. If pump is baseplate mounted, the base plate must be
used for all lifting purposes, not any part of the pump. If slings are used for
lifting, they must be safely and securely attached. For weights of bare shaft
pumps refer to section 5.5.
DO NOT attempt any maintenance or disassembly of the pump or pump unit
without first ensuring that:
- The pump is fully isolated from the power source (electric, hydraulic,
pneumatic).
- The pumping chamber and any shaft seal support system, front cover
barrier support system, and rotorcase port barrier support system are
de-pressurised and purged.
- Any temperature control devices (jackets, heat-tracing, etc) are fully
isolated, that they are de-pressurised and purged, and components
allowed to reach a safe handling temperature.
DO NOT loosen or undo the front cover, any connections to the pump, shaft
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seal housings, barrier support systems, temperature control devices, or other
components, until sure that such action will not allow the unsafe escape of any
pressurised media.
Pumps and/or drives can produce sound pressure levels exceeding 85-dB (A)
under certain operating conditions. When necessary, personal protection
against noise must be taken. See section 5.8 for typical noise emission data.
Avoid any contact with hot parts of pumps and/or drives, which may cause
injury. Certain operating conditions, temperature control devices (jackets, heat-
tracing, etc), bad installation, or poor maintenance can all promote high
temperatures on pumps and/or drives.
When cleaning, either manually or by CIP method, the operator must ensure
that a suitable procedure is used in accordance with the system requirements.
For CIP cleaning requirements, refer to section 3.3.2. The exterior of the pump
should be cleaned periodically.
Surface temperature of pump is also dependent on the temperature of
pumped medium.
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1.1 Risk assessment relating to the use of Wright Flow Technologies
Limited. Concept SQ rotary lobe pumps and pump units in potentially
explosive atmospheres.
Source Of Hazards Potential Hazards
Frequency Of
Hazards Recommended Measures
Unvented cavities Build up of explosive gas
Very Rare
Ensure that pump is totally filled.
Consider mounting ports vertically.
See Chapter 1.0
Rotorcase / Rotors / Front
Cover Unintended mechanical contact
Rare
Ensure that operating pressures are
not exceeded. Ensure that suffcient
NPSH to prevent cavitation. See
Chapter 1.0 / 3.3.1 Service plan.
Pump external surfaces excess temperature.
Electrostatic charging
Rare
User must ensure temperature limits.
Do not overfill gearboxes with
lubricant. Provide a ground contact
for pump. See Chapter 1.0 /
Service
plan.
Cover 'O' ring
Pump liquid leakage. Build
up of explosive gas.
Very Rare
Check selection of elastomers are
suitable for application. Ensure cover
retaining nuts are tight. Service plan.
Pump casing / cover
Pump liquid leakage. Build
up of explosive gas.
Very Rare
Stainless steel, Corrosion resistant.
Shaft seals
excess temperature.
Unintended mechanical
contact.
Leakage.
Build up of explosive gas.
Rare
Selection of seal system must be
suitable for application.
See Chapter
1.0 / 4.5. Service plan. Seals must
never run dry.
Auxiliary system for shaft
sealing
Pump liquid leakage. Build
up of explosive gas.
Rare
Selection of auxiliary seal system
must be suitable for application.
Seals must never run dry.
Rotation direction test Excess temperature
Very Rare
If flushed seals are installed ensure
that flush is applied to seal
assemblys. Only allow pump to run
for minimum period - just a few
seconds.
Closed valve condition Excess Temperature. Excess Pressure.
Mechanical contact.
Rare
Can cause excessive pressue, heat
and mechanical contact. See
Chapter 1.0
Shaft Random induced current
Very Rare
Provide a ground contact for pump.
See Chapter 1.0.
Mechanical shaft coupling
(Torque Protection)
Temperature from friction
Sparks from break up of
shear pins.
Electrostatic charging
Rare
Coupling selection must suit
application. See Chapter 1.0.
Mechanical shaft coupling
(standard)
Break up of spider.
Unintended mechanical
contact.
Electrostatic charging
Rare
Coupling selection must suit
application. Service plan. See
Chapter 1.0.
Note:
-
For a feature to be suitable for an applic
ation, The feature must be fit for its
designated purpose and also suitable for the environment where it is to be installed.

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2.0 Introduction
2.1 General
The range of Concept SQ rotary lobe pumps are manufactured and distributed,
refer to section 2.2, by Wright Flow Technologies Limited, Eastbourne,
England.
This manual includes all the necessary information for the Concept SQ pump
range and should be read prior to commencing installation, operation or
maintenance.
When asking for assistance please quote the pump model and serial number.
This information can be obtained from the pump nameplate which is located on
the top of the pump gearbox cover, refer to section 2.6.
Should the nameplate be unreadable or missing, the pump serial number is
also stamped on the rear face of the rotorcase, refer to section 2.6, Figs 2 & 3.
If it is proposed to modify the system or change the characteristics of the
product to be pumped from that for which the pump was originally selected,
Wright Flow Technologies Limited or their authorised distributor should be
consulted.
2.2 Wright Flow Technologies Limited Distributors
Wright Flow Technologies Limited distributes their products internationally via a
network of authorised distributors. Throughout this manual where reference is
made to Wright Flow Technologies Limited, any authorised distributor will also
provide service and assistance. Should you require any additional information
regarding the Concept SQ range of pumps contact Wright Flow Technologies
Limited or their local authorised distributor.
2.3 Receipt and Storage
On receipt of the pump, immediately examine for any signs of visible damage.
If any damage is noted, contact Wright Flow Technologies Limited and clearly
mark upon the carriers paperwork that the goods have been received in a
damaged condition, with brief description of damage.
If the pump is not required for immediate installation then it should be stored
within a suitable environment.
2.4 Cleaning
The Concept SQ pump range is suitable for manual cleaning, CIP (Cleaning In
Place) and SIP (Sterilisation In Place) refer to section 3.3.2.
The mechanical seals are mounted directly behind the rotor and are designed
and to minimise product entrapment and maximise the effects of cleaning.
This strategic positioning of the mechanical seals, combined with their ease of
access provides an arrangement that can be more effectively cleaned by both
manual and CIP/SIP procedures.

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It is recommended that the exterior of the pump be cleaned periodically.
2.5 Pump Model Designation
The designation of pump models in the Concept SQ range is as follows: -
SQ1/0004/12 (SQ1S)
SQ1/0007/06 (SQ1L)
SQ2/0017/15 (SQ2S)
SQ2/0030/07 (SQ2L)
SQ3/0054/15 (SQ3S)
SQ3/0103/07 (SQ3L)
SQ4/0160/15 (SQ4S)
SQ4/0303/07 (SQ4L)
This, together with the pump serial number, should be quoted when requesting
additional information on the pump or when ordering spare parts. The pump
serial number is stamped on the pump nameplate and the rear face of the
rotorcase, refer to section 2.6, Figs 2 and 3.
For an explanation of pump model designations see Fig 1.
For the maximum operating pressures, temperatures and speeds refer to
section 3.2, Fig 6.
Fig 1 (European Designation)
SQ 3 0054 15/ /
P UMP
M
ODEL
D ISPLACEMENT
(L TRS / REV X
100.)
M ODEL
S
IZE
M AX . P RESSURE
(B AR )

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2.5.1 ATEX Information
ATEX Pump Requirements
Please be aware that mechanical seals are a source of heat and must never be
allowed to run dry. We would recommend provision be made to ensure that there is a
flow of fluid around the pump seals at all times. If there is a risk of the supply being
interrupted, we would recommend that the flush on the seals be fitted with a flow
detection device. The surface temperature of the pump is dependent on the
temperature of the pumped fluid and due account of this should be taken whilst
undertaking your risk assessment of the installation. These pumps are rated to T3.
2.5.2 Equipment Groups & Categories
TEMP - T3
SERIAL NO:
ex II - 2 - G/D
Group
II.
Category 2
Unit is suitable for
environments
containing dust or gas
Temperature Class.

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2.6 Pump Model and Serial Number
Should you require any information regarding your Concept SQ rotary lobe
pump contact Wright Flow Technologies Limited quoting the pump model and
serial number as stated on the pump nameplate, see Fig 2, which is fixed to
the pump gearbox cover,
Should this be damaged or missing, the pump serial number is also stamped
on the rear face of the rotorcase, see Fig 3.
Fig 2
Fig 3
12345 / A / 99

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2.7 Standard Pump Component Terms
Fig 4

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3.0 General
3.1 Concept SQ Range Pumping Principle
see Fig 5
Fig 5
The pumping action of the rotary lobe pump principle is generated by the
contra-rotation of two pumping elements (rotors) within a chamber (rotorcase),
see Fig 5. The rotors are located on shafts, which in turn are held within two
cartridge assemblies. The shaft cartridge assemblies comprise the shaft
support bearings and the timing gears. The timing gears transfer the drive from
the driven shaft to the lay shaft, synchronising the rotors such that they rotate
without contact with each other.
As the rotors pass the suction port, see Fig 5a, the cavity generated increases
creating a pressure decrease, which induces the media to be pumped to flow
into the rotorcase.
The pumped media is carried around the rotorcase by the rotors, see Fig 5b
and 5c, to the discharge side of the pump, Fig 5d. Here the cavity decreases
and the pumped medium is discharged from the rotorcase, Fig 5e.
For pump component terms see Fig 4.

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3.2 Concept SQ Range Operating Parameters
Fig 6
Concept SQ
Model
D ISPLACEMENT
C ONNECTION S IZE
(International
Standards)
D IFFERENTIAL
P RESSURE
(Maximum)
M AXIMUM
S PEED
(Continuous)
M AXIMUM
T EMPERATURE
(Continuous)
litres / rev
I gal /
100 rev
US gal /
100 rev mm Inches Bar lbf/in² rev / min °C
°F
SQ1/0004/12
0.04 0.88 1.06 25 1.0 12 175 1000 150 300
SQ1/0007/06
0.07 1.76 2.11 25 1.0 6 85 1000 150 300
SQ2/0017/15
0.17 3.74 4.49 40 1.5 15 215 850 150 300
SQ2/0030/07
0.30 6.60 7.93 50 2.0 7 100 850 150 300
SQ3/0054/15
0.54 11.88
14.27 50 2.0 15 215 700 150 300
SQ3/0103/07
1.03 22.66
27.21 80 3.0 7 100 700 150 300
SQ4/0160/15
1.60 35.20
42.27 80 3.0 15 215 600 150 300
SQ4/0303/07
3.03 66.66
80.06 100 4.0 7 100 600 150 300
The maximum pressure and speed operating parameters are given in Fig 6. In
practice these may be limited due to the nature of the product to be pumped
and/or design of the system in which the pump is to be installed and / or the
process.
If it is proposed to modify the system/duty, or change the characteristics of the
product to be pumped from that for which the pump was originally selected
Wright Flow Technologies Limited should be consulted.
The pump should not be subjected to sudden temperature changes to avoid
the risk of damage through expansion/contraction of components. Care should
be taken when selecting pumps for handling liquids containing abrasive
particles as these may cause wear of pump head components, for advice and
assistance contact Wright Flow Technologies Limited.
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3.3 System Design
3.3.1 System Design and Installation
When incorporating any pump into a system it is considered good
practice to minimise pipework runs and the number of pipe fittings (tees,
unions, bends etc.) and restrictions. Particular care should be taken in
designing the suction line, which should be as short and straight as
possible with the minimum of pipefittings to minimise restricting product
flow to the pump. The following should be considered at the design
stage of any system.
a) Ensure ample room is provided around the pump to allow for: -
ii) Access to the pump and drive for routine inspection and
maintenance, for example to replenish pump or drive
lubricant, remove pump front cover and rotors.
iii) Ventilation of the drive to prevent over heating.
b) The pump must not be used to support pipework; all pipework to
and from the pump unit must be independently supported. Failure
to observe this may cause distortion of the pump head
components or assembly and serious consequential damage to
the pump.
c) Valves should be provided adjacent to the pump suction and
discharge connections to allow the pump to be isolated from the
system for routine inspection and maintenance.
d) Rotary lobe pumps are of the positive displacement type and
therefore an overload protection device must be provided. This
can take the form of:-
i) An in-line pressure relief system, i.e. external to the pump.
ii) Inclusion of a torque limiting device in the drive system.
iii) Rupture disc incorporated in the discharge pipework.
e) Where pump rotation and hence flow is to be reversed during
normal operation the overload device must be capable of
protection for both directions of rotation/flow.
f) It is considered good practice to ensure all pipework and
associated plant from the suction vessel to the discharge point is
thoroughly cleaned before installation of the pump to avoid the
possibility of debris entering the pump and causing damage.
g) Pressure gauges should be installed adjacent to the pump suction
and discharge connections such that system pressures can be
monitored. These gauges will provide a clear indication of
changes in operating conditions and where a relief valve is
incorporated in the system, will be necessary for setting and
checking the functioning of the valve.
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h) Suction Conditions
It is imperative that the suction condition at the pump inlet meets
the Net Positive Suction Head Required (NPSHR) by the pump.
Failure to observe this could cause cavitation, resulting in noisy
operation, reduction in flow rate and mechanical damage to the
pump and associated equipment.
The Net Positive Suction Head Available (NPSHA) from the system
must always exceed the Net Positive Suction Head Required (NPSHR)
by the pump. Observing the following general guidelines should ensure
the best possible suction condition is created.
- Suction pipework is at least the same diameter as the pump
connections.
- Suction pipework is straight for a distance of at least the
equivalent of 10 pipe diameters immediately before pump.
- The length of suction pipework is kept to the absolute minimum.
- The minimum number of bends, tees and pipework restrictions
are used.
- That calculations to determine system NPSHA are carried out for
the worst condition, see Fig 7.
- Should advice on pump or system NPSH characteristics be
required contact Wright Flow Technologies Limited.
Fig 7
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i) When installing a pump complete with baseplate, motor and drive
the following guidelines must be observed:
- The preferred drive arrangement for any rotary lobe pump
is in-line direct coupled. If an alternative is required please
contact Wright Flow Technologies Limited.
- Flexible couplings must always be incorporated and
correctly aligned. To check coupling alignment rotate the
shaft by at least one full revolution and ensure that the
shaft rotates smoothly.
Fig 8 To check for and correct angular misalignment, use
a calliper to check the measurement across the
hubs. Adjust position of pump or drive as
necessary until the measurement is the same at all
points around the hubs.
Fig 9 To check for and correct parallel
offset, place a straightedge across the
hub flanges in two positions at 90
Degrees to each other. Adjust
position of pump or drive as
necessary until the straightedge lays
flat on both sides.
Note:
Some couplings are able to withstand gross angular and/or parallel
misalignment. However, the above methods of reduce these effect to an
absolute minimum is required to avoid placing excessive loads onto
pump and/or drive components. The table below gives details of
maximum parallel and angular misalignments allowed.
C
ONCEPT SQ
M ODEL M
AXIMUM P ARALLEL
M ISALIGNMENT ( MM ). M
AXIMUM A NGULAR
M ISALIGNMENT (D EGREES )
SQ1 0.05 0.5
SQ2 0.075 0.5
SQ3 0.10 1.0
SQ4 0.15 1.0
Couplings of a non-flexible design must never be used.

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- Couplings must always be enclosed in a suitable guard to prevent
contact with rotating parts, which could result in personal injury.
Guards should be of suitable material, see below and of
sufficiently rigid design to prevent contact with rotating parts
under normal operating conditions.
Note: The guard must be designed such that it fully covers the
projecting part of the lay shaft of the pump.
- When installing pump sets in flammable or explosive
environments, or for handling flammable or explosive materials.
Special consideration must be given to the safety aspects of the
drive unit enclosure and also to the materials used for both the
coupling and the guard to eliminate the risk of producing sparks.
- Baseplates must be secured to a flat level surface such that
distortion and misalignment are avoided. Once baseplates are
fastened in position the drive alignment must be re-checked.
- When using electric motor drives ensure that the electrical supply
is compatible with the drive and controls and that the method of
wiring is correct for the type of starting required by the motor i.e.
Direct On Line, Star Delta etc. Ensure all components are
correctly earthed.
3.3.2 Installations with CIP/SIP Systems
The Concept SQ pump range has been designed to be effectively
cleaned by the CIP procedures recommended for in place cleaning of
process plant. To assist in maximising the effectiveness of cleaning
within the pump head it is recommended that during the cleaning cycle a
flow rate equivalent to a velocity of 1.5 metres per second; in a pipe of
equal diameter to the rotorcase connections is achieved. With a
differential pressure of 2 to 3 bar being developed across the pump
head.
For applications where maximum drainage of the pump head is required,
for example in the handling of ‘Agri-Foodstuffs’ and / or where CIP is
employed, the pump should be mounted with the rotorcase connections
in the vertical orientation. A procedure must be determined to ensure
that the pump is effectively cleaned. It is recommended that this cycle
would typically include a combination of some or all of the following:
Acidic or Caustic based Detergents, ‘Sanitisers’, Disinfectants and
Water rinses. These must be appropriate to both the products being
handled and the materials of construction of the pump.
The Concept SQ pump range is also suitable for SIP treatment.
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3.4 Start Up Procedure
- Check all pipework and associated equipment is clean and free
from debris and that pipe connections are secure and leak free.
- For pumps installed with flushed mechanical seals check all
auxiliary services are in place and connected and provide
sufficient flow and pressure for flushing purposes, refer to section
4.5.7.
- For pumps installed with Fluid Barrier devices on Front Cover /
Rotorcase joint and Rotorcase port connections, check all
auxiliary services are in place and connected and provide
sufficient flow and pressure, refer to sections 3.8 and 3.9.
- Ensure lubrication is provided for both pump and drive. Concept
SQ pumps are despatched without oil and should be filled to the
level of the oil sight glass which must be installed in the upper
tapped hole in the side of the gearbox cover, refer to section 5.3
for pump oil capacities and grades.
- Check that, if an external relief valve is incorporated in the
system, it is set correctly. For commissioning purposes it is
considered good practice to set the relief valve lower than the
system design pressure. On completion of commissioning the
relief valve should be reset to the required setting for the
application. The required setting should never exceed the lower
of either the pumps maximum pressure rating or the system
design pressure.
- Ensure both suction and discharge valves are fully open, and
pipework is free from all obstructions. Concept SQ pumps are of
the positive displacement type and should therefore never be
operated against a closed valve as this would result in pressure
overload, resulting in damage to the pump and possibly the
system.
- Ensure rotation of the drive shaft is correct for the direction of flow
required (see Fig 10).
Fig 10
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- Ensure product is available in the suction vessel before starting
pump, this is very important for pumps installed with single
mechanical seals not being serviced with a quench or flush as
these sealing arrangements must never be allowed to run dry.
- Before commencing operation it is considered good practice to
momentarily start/stop the pump to check the direction of rotation
and ensure that the pump is free of obstructions. Once this has
been carried out commence operation keeping a visual check on
suction and discharge pressure gauges and monitor pump
temperature and power absorbed where possible.
3.5 Shutdown Procedure
When shutting the pump down, close both the suction and discharge valves
and ensure that the necessary safety precautions are taken: -
- The prime mover power source has been isolated.
- That, where employed, mechanical seal flush, rotorcase port
connection barrier flush and front cover barrier flush auxiliary
services have been isolated, de-pressurised and fully drained.
- That, where employed, heating / cooling devices have been
isolated, de-pressurised and fully drained.
- Pump head and pipework have been drained and purged.
3.6 Routine Maintenance
- Check mechanical shaft seals for leakage.
- Check oil levels regularly.
- Change the oil every 12 months or 3000 operating hours
whichever is the sooner. For lubricant capacities and grades refer
to section 5.3.
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