SKV-tec SKV-LRP-Series User manual

Installation- and Operating Instructions
Liquid Ring Pump
SKV-LRP-Series
high quality – fair prices
SKV-tec GmbH
Forchheimer Str. 4
91338 Igensdorf
Germany
el.: +49 (0) 9192 – 99 53 14
Fax: [phone] – 99 52 68
www.skv-tec.de
[email protected]
Status: 08/2015

SKV-tec Gm H Operating Instructions
Index
1 Important basic information...................................................................................................................3
1.1 Definition........................................................................................................................................ 3
1.2 Safety instructions..........................................................................................................................3
2 Safety.................................................................................................................................................... 4
2.1 Intended use..................................................................................................................................4
2.2 Potential misuse.............................................................................................................................4
2.3 general safety instructions.............................................................................................................4
2.4 Residual risks................................................................................................................................. 5
3 Design and function............................................................................................................................... 6
3.1 Nameplate...................................................................................................................................... 6
3.2 Model type (Code).........................................................................................................................6
3.3 Description of the unit....................................................................................................................6
3.4 Design and operating mode of the unit...........................................................................................6
4 ransport, storage and disposal............................................................................................................7
4.1 ransport........................................................................................................................................7
4.2 Storage.......................................................................................................................................... 8
4.3 Preservation................................................................................................................................... 8
4.4 Disposal......................................................................................................................................... 9
5 Installation and connection..................................................................................................................10
5.1 Preparation..................................................................................................................................10
5.2 Set-up of the unit..........................................................................................................................10
5.3 Connecting pipes/flexible pipes....................................................................................................10
5.4 Electrical connection....................................................................................................................11
6 Operation............................................................................................................................................. 12
6.1 Preparations prior to commissioning............................................................................................12
6.2 Commissioning............................................................................................................................ 12
6.3 Flow rate adjustment of the operating fluid ..................................................................................13
6.4 Decommissioning.........................................................................................................................15
6.5 Recommissioning.........................................................................................................................15
7 Service and maintenance....................................................................................................................16
7.1 Monitoring of the aggregate......................................................................................................... 16
7.2 Cleaning of contaminations..........................................................................................................17
7.3 Service / Support......................................................................................................................... 17
7.4 Spare parts..................................................................................................................................17
7.5 Disassembly of the unit................................................................................................................18
7.6 Assembling of the unit.................................................................................................................. 19
8 roubleshooting................................................................................................................................... 20
9 echnical Specifications.......................................................................................................................22
9.1 Operating limitations....................................................................................................................22
9.2 Preservative................................................................................................................................. 22
9.3 General technical data.................................................................................................................22
10 Appendix............................................................................................................................................ 23
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SKV-tec Gm H Operating Instructions
1 Important asic information
hese operating instructions contains informations about
●product description,
●safety,
●transport,
●storage,
●set-up and operation,
●maintenance,
●servicing,
●troubleshooting and
●spare parts
of the liquid ring pump.
"exposure" of the liquid ring pump in terms of these operating
instructions are the transport, storage, set-up, operation,
control over operating condition, maintenance,
troubleshooting and servicing of the liquid ring pump.
Prior to exposure of the liquid ring pump the
responsi le staff for operation and servicing have to
completely read and understand the operating
instructions. The operating instructions must e
strictly adhered to. The operating instructions and all
enclosed documents must e kept at the place of
installation so it is always availa le.
If there a du ities please contact the responsi le
representation of the SKV-tec Gm H!
1.1 Definition
aggregate complete liquid ring pump including
pump, power unit and its components
pump liquid ring pump without power unit and
components
separator device for separating gaseous from
liquid media
vacuum valve valve for limiting the created vacuum
1.2 Safety instructions
he liquid ring pump have been designed and manufactured
in accordance with state-of-the-art technology. Nevertheless
by exposure of the liquid ring pump there will remain some
threats. In these operating instructions we will refer at suitable
points to threats.
Safety instructions are marked with keywords like DANGER,
WARNING, CAUTION or ATTENTION:
DANGER
Risk of personal injuries!
Disregarding this safety instruction leads to
accidents resulting in death or severe
injuries.
WARNING
Risk of personal injuries!
Disregarding this safety instruction can
lead to accidents resulting in death or
severe injuries.
CAUTION
Risk of personal injuries or property
damage!
Disregarding this safety instruction can
lead to accidents with minor injuries or
property damage.
ATTENTION
Risk of hearing loss!
Depending on the size, the unit can emit
sound of high volume.
Depending on the operating state of the
unit can emit sounds in a narrow frequency
band.
For longer stays in the vicinity of a non-
sound-insulated aggregate hearing
protection should e worn.
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SKV-tec Gm H Operating Instructions
2 Safety
he manufacturer is not liable for damages caused by non-
observance of these operating instructions.
2.1 Intended use
•All provisions of this manual , including all safety
instructions must be observed
•Inspektion and maintenance intervals must be
complied with
•he unit must be operated exclusively for the
delivery of approved media. Approved media are:
◦dry or moist gases, which are neither explosive,
inflammable, aggressive or toxic
◦Air or air-steam mixtures which contain either no
solids, or only small amounts of particulate
matter
•he unit may be operated only with approved
operating fluids (solid-free water with a pH value of
6-9).
•he following scenarios have to be avoided:
◦Dry run: Ensure that the unit is operated with
sufficient (never without) operating fluid,
otherwise the seals take damage within a few
seconds.
◦Cavitation : Installation of a vacuum safety valve
he pump must not be operated with closed
suction
◦Overheating: Do not operate the unit with closed
connections
◦Motor damage: he following parameters must
be considered: the maximum flow rate to pump
liquids, the switching frequency of the unit.
he motor protection switch must be set at least
to the nominal current.
•he unit is intended exclusively for professional use
•he exposure of the unit is only permitted by
qualified personnel
Prior to exposure of the liquid ring pump the responsi le
staff for operation and servicing have to completely read
and understand the operating instructions.
If in dou t, please contact the responsi le representation
of the SKV-tec Gm H!
2.2 Potential misuse
•he operating limits of the unit concerning pressure,
temperature of the medium and the operating fluid
density, viscosity and velocity are observed and
complied with
•he permissible density of the operating fluid must
be respected, otherwise the unit will overload. (see
chapter 9.1, page 22)
he power consumption of the motor increases with
the density of the working fluid.
•Avoid sudden changes in pressure of the transported
gas
•Sudden changes in temperature of the transported
gas as well as the operating fluid must be avoided
•Unauthorised opening of the unit will void any claims
for defects
•If the unit is not approved for the requested use,
operation is prohibited in the following scenarios
◦Operation in rooms where explosive gases may
be present
◦Extracting, delivering or compressing of
explosive, inflammable, aggressive or toxic
media
2.3 general safety instructions
he unit is designed and manufactured according to the state-
of-the-art of technology and the generally acknowledged rules
of safety. Nevertheless by the exposure of the unit it may
occur to danger to life of the user or third parties as well as
damage to the unit.
herefore, the following guidelines must be observed:
•he unit may only be operated in a technically
flawless condition and in compliance with the
regulations, safety precautions and warnings
included in this manual.
•Ensure that this manual and related documents are
complete and readable. In addition, make sure that
the staff has access to these documents at any time.
•Refrain from any operating mode which brings the
staff or third parties at risk
•In case of error which impacts on safety, immediately
shut down the unit and consult the person
responsible for fault diagnosis.
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SKV-tec Gm H Operating Instructions
2.4 Residual risks
WARNING
Risk of injuries from flying parts , which
reach into the openings of the engine
cooling or the coupling guard!
 Don't bring in lose parts!
Danger of urns and scalding y contact
with hot surfaces or media!
 Do not touch or wear safety gloves!
Risk of injuries caused y escaping
operating fluid due to a defective
mechanical seal!
 Immediate shutdown of the unit and
subsequent repair of the pump!
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SKV-tec Gm H Operating Instructions
3 Design and function
3.1 Nameplate
1 Product name
2 Serial number
3.2 Model type (Code)
LRP - 50 - 3 - 916
Pump type
Model size
Number of phase
Engine code
Figure 2: Model-/pump type
3.3 Description of the unit
he aggregates of the LRP series are horizontal, single-stage
liquid ring pumps with radial inlet and outlet.
he pumped gases / vapors are thereby controlled internally
by appropriate transport channels and special valve systems.
he electric motor is modularly connected to the pump unit.
he sealing of the driving shaft is ensured by a maintenance-
free mechanical shaft seal.
he LRPs with the size 30 and 50 are internally equipped with
a separator which separates the gas-water mixture on the
pressure side into its phases. So the separated operating fluid
remains in the aggregate and can be reused .
Pos. Description
ALConnection for vent valve
ABF Connection for operating fluid
AAb Screw plug for drainage
AMConnection for manometer
AKav Connection for cavitation protection
Table 1: Legend figure 3
3.4 Design and operating mode of the unit
he pump operates according to the liquid ring principle. In
the cylindrical housing - pumping chamber – there is the
impeller with the impeller blades. he impeller is positioned
eccentrically to the housing.
By the operation of the pump the operating fluid in the
pumping chamber will be set in motion and accelerated
through the rotating impeller. Due to the centrifugal force a
liquid ring which is concentric to the housing and eccentrically
to the impeller will be formed.
A crescent-shaped working space between the liquid ring and
the impeller hub results due to the eccentric position of the
impeller . hereby the remaining volume between the impeller
blades varies with each revolution. Due to the increasing hub
in the area of the suction slot the medium to be conveyed is
sucked. A half turn later, it is compressed by the decreasing
space and discharged on the the pressure side.
he liquid ring – in the form of the operating fluid – thereby
ensures that the individual impeller chambers are separated
and sealed from one another and that the created heat due to
the compression can be dissipated.
Because a part of the operating fluid is discharged
with the medium to be delivered, it must be ensured
that this will be returned. his can be done by a
pressure-side separator.
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Figure 1: Nameplate
Figure 3: Connections of t e unit

SKV-tec Gm H Operating Instructions
4 Transport, storage and disposal
4.1 Transport
he weight data of the unit must be observed!
WARNING
Danger from overturning or falling loads!
 Before transporting all components must be
securely mounted. Loose parts must be
secured accordingly or removed!
CAUTION
Overturning or falling loads can lead to
ruising, fractures, etc.!
Cuts from sharp edges!
 Protective equipment must be worn !
Packaging and inspection:
On delivery, the unit is screwed to a pallet and protected by a
foil and a cardboard box. Unpack the unit and check for
transport damage. ransport damages immediately report to
the responsible representation of the SKV-tec GmbH!
Manual transport y hand:
WARNING
Danger from lifting heavy loads!
 he permissable weights for lifting and
carrying of components must be observed!
•in men max. 30 kg
•in women max. 10 kg
•in pregnant max. 5 kg
Weights of the unit see chapter 9.3, „Unit data“
Transport with lifting gear:
WARNING
Danger from overturning or falling loads!
 he following basic rules must be observed
when transporting with lifting equipment:
•the carrying capacity of the lifting gear
must be at least the weight of the
aggregate
•the unit may only be transported
horizontally and must be secured
against overturning and falling
•he hanging of the aggregate by the
ring lug of the motor is not allowed
•Attach straps as shown in Figure 4
•Do not stand under suspended loads
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Figure 4: Positioning t e strap

SKV-tec Gm H Operating Instructions
4.2 Storage
Units prepared by the factory have an anti-corrosion coating.
his protects the aggregate for a maximum of three months
when properly stored indoors.
For longer storage periods or for aggregates which were
already in operation and should be stored, the unit must be
reconserved (see chapter 4.3, page 8).
CAUTION
Risk of material damage due to improper
storage!
he unit must be stored in accordance with the
guidelines of this manual!
•Seal all openings and connections with appropriate
sealing plugs or screw caps
•he storage room must be dry, frost-free, vibration-
free, protected and have to ensure a constant
humidity
•he motor shaft must be moved once a month. It
must be ensured that the position of the motor shaft
and the ball bearings changes.
•For storage periods longer than 6 months all
components made of elastomers (EPDM) must be
replaced for recommissioning. Components such as
o-rings and shaft seals must be checked for elasticity
and replaced if necessary.
4.3 Preservation
CAUTION
Risk of material damage due to improper
storage!
he unit must be handled in accordance with
the guidelines of these operating instructions
inside and outside with an approved
preservative!
•Choose the preservative in accordance with the
model type, the storage period and in accordance
with the manufacturer's specifications
•All bare metal parts inside and outside the pump and
the impeller clearance must be treated with
preservatives
•he unit must be switched off!
Inside the system:
•Position a suitable container of the drainage bore
•Remove the screw connection of the drainage bore
and drain the operating fluid
•urn the motor shaft in rotation direction until no
more fluid escapes
•Close the drainage bore with the screw
•Remove the pipes on the suction, pressure and
operating fluid connection and close the pressure
and the operating fluid connection with a screw
•Fill the provided filling quantity of preservative (see
chapter 9.2, page 22) into the suction connection and
close it afterwards
•For a uniform distribution of the preservative short-
time switch on the unit and then off again
•Remove the screw of the drainage and the operating
liquid connection and drain the preservative in
suitable containers
•urn the motor shaft in rotation direction until no
more fluid escapes
•Finally close the drainage and the operating fluid
connection with respective fittings
Outside the system:
•Position a suitable container of the drainage bore
•Close the drainage and the operating fluid
connection with respective fittings
•Fill the provided filling quantity of preservative (see
chapter 9.2, page 22) into the suction side alternative
pressure side connection until the preservative is
visible
•urn the motor shaft in rotation direction until the
preservative appears nearly 30 mm below the top
edge of the connection
•Remove the screw of the drainage and the operating
liquid connection and drain the preservative in
suitable containers
•urn the motor shaft in rotation direction until no
more fluid escapes
•Finally close the suction side, pressure side,
drainage and the operating fluid connection with
respective fittings
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SKV-tec Gm H Operating Instructions
Removal of the preservative:
CAUTION
Risk of earing damage caused y
excessive water pressure or splash water!
Protect bearings from water and steam jet!
Risk of seal damage due to unsuita le
cleaning agents!
Detergents must not harm the seals!
Choose a suitable detergents for the particular
application. Flush out the preservative from the unit
and dispose both according to local regulations.
4.4 Disposal
WARNING
Risks of environmental damage caused y
liquid eing pumped!
•Escaping pumped liquid must be
removed and disposed of separately
•Plastic parts must be removed and
disposed of separately
•Liquid residues in the aggregate must
be neutralized
•Preservatives must be removed
 Assign an authorized company with the
disposal of the unit
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SKV-tec Gm H Operating Instructions
5 Installation and connection
CAUTION
Risk of material damage due to
contamination!
 Remove transport locks until immediately
prior to installation of the unit
 Remove the transport covers of the
connections until just before installation of the
pipes to the unit
Risk of material damage due to overheating
of the unit!
 Set up the unit according to the specified
minimum distances (see chapter 9.3, minimum
distance W ) so that heat dissipation and
cooling air are unimpeded!
 Sucking air from other units must be
avoided!
CAUTION
Overturning or falling loads can lead to
ruising, fractures, etc.!
Cuts from sharp edges!
 While transporting and installing protective
equipment must be worn!
Danger of tripping and falling !
 he unit must not form a tripping hazard!
Danger from flying parts !
 Ensure that loose parts are secured and/or
removed!
 Provide sufficient safety margin so that no
persons may be hurt by a fraction due to a fault
in the external fan!
GEFAHR
Electrical danger!
•Installation of the unit must be
performed in such a way that it does
not harm the electrical device
•Supply lines should be routed safety
as cable ducts or in the ground
 Any electrical work must be performed by a
qualified electrician!
5.1 Preparation
 he required environmental conditions (see chapter 9.3,
ambient conditions) must be checked
 Minimum distances (see chapter 9.3, minimum distance
W ) for heat dissipation must be observed
 he location of installation must meet the following
conditions:
•he unit must be freely accessible from all sides
•sufficient working space for installation of cables as
well as for maintenance and repair must be provided
•he unit must be set up vibration-free
Only with adequate vibration freedom faultless
operation and a long service life of the equipment is
ensured
 Before installing the preservative must be removed
5.2 Set-up of the unit
he guidelines from chapter 5.1, „Preparation“ must be
observed.
Furthermore, the following must be observed when setting up
the unit :
•must be carried out on flat areas
•unless otherwise indicated the aggregate may be set
up only horizontally (shaft position)
•on stationary areas or structures must be ensured
that the viability of this area is designed for at least
the weight of the aggregate
•the unit must be secured on ground with the
appropriate feets using suitable fastening elements
(4x M12-8.8)
5.3 Connecting pipes/flexi le pipes
When designing the pipework the following guidelines should
be observed :
•the flow resistance in the tube should be kept as low
as possible
•Diameter of the suction / discharge pipe should be at
least as large as the corresponding connection
diameter on the unit (see chapter 9.3, „ hreads of
the connections“)
•All pipes should be kept as short as possible
 for long pipes cross-section must be increased
 the pipe at the discharge must not be higher than
1m vertically into the air
•sudden changes in cross section must be avoided
•Provide a filter and a ball valve in the suction pipe
(avoidance of a backflow of operating fluid while
downtime)
•o avoid air pockets the pipes should have a
continuous slope to the aggregate
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SKV-tec Gm H Operating Instructions
CAUTION
Risk of material damage due to
contamination!
 he interior of the unit must be free of
contamination!
When installing the pipes ensure the following :
•Before installation all pipes and hydrants must be
cleaned
•Make sure that no gasket or sealing material (sealing
tape) extends into the interior
•he flanges must be free of flange lids, plugs and/or
security films
5.4 Electrical connection
he electrical connection must be carried out in accordance
with the following guidelines:
•appropriate VDE or national regulations
•the applicable national, local and system-specific
regulations
•applicable regulations of the utility company at the
location of installation
DANGER
Electrical danger!
Any electrical work must be performed by a
qualified electrician!
Before starting work on the unit the following
provisions must be performed:
•Disconnect unit from the mains
•Ensure the absence of voltage
•Secure against restart
•Earth and short circuit
•Cover and safeguard neighboring live
parts
he data on the nameplate of the motor must necessarily
match with the conditions at the installation site!
WARNING
Risk due to pressure and vacuum!
Risk caused y escaping media!
Before starting work on the unit:
•Supply of operating fluid closed
•Unit and pipes depressurised
Electrical danger!
erminal box must be free from:
•foreign bodies
•contaminations
•humidity
he electrical connection must be made in accordance with
the circuit diagram in the terminal box cover , thereby
following should be noted:
•Protective conductor must be connected
•erminals must be used
•Ensure that the connections are safe in the long term
•erminal box cover and cable entries must be close
to dust and water
he terminal box must be checked regularly for leaks
o protect the motor against overload a motor protection
switch have to e used. his must be set to the nominal
current which can be found on the nameplate of the motor.
CAUTION
Risk of material damage caused y dry
running!
 Aggregate must be filled with sufficient
operating fluid (see chapter 9.3, „operating
fluid“)!
Risk of material damage due to incorrect
direction of rotation!
It may cause damage to the unit and the
escape of operating fluid through the
mechanical seal
 Check polarity of the electrical connection (if
necessary swap two phases)!
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SKV-tec Gm H Operating Instructions
6 Operation
WARNING
Risk due to pressure and vacuum!
Risk caused y escaping media!
Before operating the unit the following
conditions must be met:
•At the connections suction, pressure
and operating fluid pipes were
installed
•all pipes are dense and have a
sufficient strength
 When working on the unit protective
equipment must be worn!
Danger from rotating parts!
Before operating the unit, the pump housing
and the fan cover must be installed!
Risk of injury from the operation of the unit!
When operating the unit the following must be
avoided:
•o touch the aggregate
•Performing works on aggregate
6.1 Preparations prior to commissioning
 Identification of the pump model by the nameplate (see
chapter 3.1, page 6)
 For treated and / or stored aggregates the preservative
(see chapter 4.3, page 8) must be removed
 Determination / verification of downtime
•for downtime over a year the manufacturer must be
contacted for necessary steps
•for downtimes less than one year the prescribed
steps (see chapter 6.2, commissioning) must be
performed
6.2 Commissioning
Filling the operation fluid:
•Open the suction and pressure sides connections
•he aggregate is maximum to fill up to the middle of
the shaft with operation fluid (see chapter 9.3,
operation fluid)
•Check connections and fittings for leaks
CAUTION
Risk of material damage caused y dry
running!
Dry running destroys the mechanical seal
within seconds
 Aggregate must be filled with sufficient
operating fluid (see chapter 9.3, operating
liquid)!
Start up:
CAUTION
Risk of material damage due to cavitation!
 A suction-side shut-off valve must be fully
open. hrottling on the suction side is
prohibited!
 A pressure-side shut-off valve is to open.
he unit must not be operated with closed
shut-off valve!
he operating limits (see chapter 9.1, page 22)
of the unit must be observed.
he following must be checked efore the first start-up:
•ightness of the piping and hose connections
•Direction of rotation
•Correct electrical connection of the motor
•Prepared and filled unit
Then continue with the following steps:
•Open the pressure-side fitting (and possibly an
existing vent valve)
•urning on the engine
•Open the suction side and operating fluid connection
•Closing the vent valve (if present) as soon as the
motor has reached nominal speed
•repeat checking for leaks of the pipes and the
aggregate
Shutdown:
•Closing the operating fluid connection
•Shutting down the motor
•Open the vent valve (if present)
•repeat checking for leaks of the pipes, the unit and
the fittings
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SKV-tec Gm H Operating Instructions
6.3 Flow rate adjustment of the operating
fluid
For the configurations shown in Figure 5 - 8 apply the
following steps:
•urning on the unit
•the pressure of the operating fluid supply must be set
to a maximum of 0,2 bar overpressure
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Figure 7: Circulation of t e operating fluid wit
temperature monitoring
Figure 8: Circulation of t e operating fluid t roug
reservoir
Figure 6: Circulation of t e operating fluid
Figure 5: continuous operating fluid supply

SKV-tec Gm H Operating Instructions
For the configuration shown in Figure 9 apply the following
steps:
•urning on the unit
•the pressure of the operating fluid supply should be
0,1 bar less than the compression pressure
Position Description
L Vent connection
S Suction side inlet
D Pressure side outlet
A overflow
F Fresh operating fluid
Z Circulation
KF ein Coolant inlet
KF aus Coolant outlet
PIC Pressure control
LIC Level control
IC emperature control
Table 2: Symbol legend for Figure 5 - 9
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Figure 9: closed circulation of t e operating fluid wit
active cooling

SKV-tec Gm H Operating Instructions
6.4 Decommissioning
DANGER
Electrical danger!
he electrical connection must be performed by
qualified electricians!
Before starting work on the unit following actions
must be performed:
•Disconnect unit from the mains
•Ensure the absence of voltage
•Secure against restarting
•Earth and short circuit
•Cover and safeguard neighboring live
parts
WARNING
Risk due to pressure and vacuum!
Risk caused y escaping media!
Before starting work on the unit:
•Supply of operating fluid closed
•Unit and pipes depressurised
 When working on the unit protective
equipment must be worn!
 escaping fluids must be collected and
disposed of in accordance with the guidelines!
he following provisions must be performed if the pump / unit
is shut down:
•If the unit is shut down but will remain operational:
 Once a month, the unit briefly (5-10 minutes) must
be put into operation
•If the unit is shut down for an extended period:
 Drain the unit and the water separator
(see "Emptying the aggregate")
 he unit must be protected with a preservative
(see chapter 4.3, page 8)
•If the aggregate already drained all connections /
fittings must be sealed
•If the unit is dismantled, it should be taken from the
mains and secure it against unauthorized activation
•If the unit is stored, the appropriate actions (see
chapter 4.2, page 8) must be performed
Emptying the aggregate:
•urning off the unit
•Position a suitable container to the drainage bore
•Open drain plug and drain operating fluid
•Close drain bore with screw again
6.5 Recommissioning
For longer storage of more than one year, all the steps of
commissioning – as described in chapter 6.1, „Preparations
prior to commissioning“ and chapter 6.2, „Commissioning“ –
must be performed.
If the unit is temporarily turned off and remains ready for
operation and filled, it is sufficient if the unit is operated once a
week.
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SKV-tec Gm H Operating Instructions
7 Service and maintenance
DANGER
Electrical danger!
he electrical connection must be performed by
qualified electricians!
Before starting work on the unit following actions
must be performed:
•Disconnect unit from the mains
•Ensure the absence of voltage
•Secure against restarting
•Earth and short circuit
•Cover and safeguard neighboring live
parts
WARNING
Risk due to pressure and vacuum!
Risk caused y escaping media!
Before starting work on the unit:
•Supply of operating fluid closed
•Unit and pipes depressurised
 When working on the unit protective
equipment must be worn!
 escaping fluids must be collected and
disposed of in accordance with the guidelines!
WARNING
Danger from rotating external fan!
he fan cover must not be dismantled!
Danger from rotating impeller of the unit!
Before starting work on the unit, the unit must
be taken out of service and the impeller
completely stopped!
WARNING
Danger of urns from hot surfaces and / or
hot fluids!
In operation, the unit must not be touched!
Allow to cool after decommissioning!
CAUTION
Overturning or falling loads can lead to
ruising, fractures, etc.!
Cuts from sharp edges!
 While transporting and installing protective
equipment must be worn!
7.1 Monitoring of the aggregate
he following points must be checked at regular intervals:
•Compliance with the volume flow and the
temperature of the operating fluid
•Compliance with the maximum permissible
compression pressure and the permitted volume
values
•Contamination of the motor and the filter
•conspicuous running noise of the ball bearings
•Current consumption of the motor
•Leak freedom of shaft seal
For trouble-free operation pay attention to:
•tightness of the connections and the aggregate
•no cavitation
•intact and clean filter
•no dry-running
•no unusual running noises or vibrations
08/2015 SKV-LRG-Series 16/26

SKV-tec Gm H Operating Instructions
7.2 Cleaning of contaminations
he unit is largely maintenance free but through the operating
liquid and the pumped gases / vapors dirt (sand, lime) can
reach into the unit. o avoid wear as well as fastening of the
impeller, the pump has to be cleaned at regular intervals.
herefore, following actions must be performed regularly:
•Periodically remove dirt which is in the cooling fins,
the external fan and the fan cover of the motor.
 Cleaning using compressed air
•Fine-grained impurities which pass through the
operating liquid and / or the pumped gases / vapors
in the unit must be removed.
 herefore install a separator, filter or mesh in the
appropriate feed pipe
 Alternatively, the unit must be cleaned regularly as
follows:
◦Decommissioning of the unit
◦Draining the operating liquid
(see chapter 6.4, "Draining the unit")
◦Remove the pump housing (see chapter 7.5)
◦Remove and rinse impurities from the housing
◦Screw on the pump housing again
(see chapter 7.6, page 19)
◦Recommissioning of the aggregate
(see chapter 6.5, page 15)
•In case of stucked impeller following steps must be
performed:
◦Decommissioning of the unit
◦Screw on the external fan side a suitable M8
screw with sufficient shaft length into the shaft
end
◦Free the impeller by rotating with the screw
◦Finally remove screw
•strong - medium hard water is used as operating
liquid:
 Softening of the operating fluid
 Alternatively, the aggregate must be descalcified
at intervals of 3 months as follows:
◦Decommissioning of the unit
◦Draining the operating liquid
(see chapter 6.4, „Draining the unit“)
◦Disassembling of pipes / hoses
◦Fill suitable decalcifier (10% acetic acid or
commercially available decalcifier) via a
connection in the aggregate
◦Effective duration of the decalcifier should be at
least 30 minutes, meanwhile provide sufficient
mixing by rotating the shaft
◦Drain and dispose of the decalcifier
(see chapter 6.4, „Draining the unit“)
◦Assembly of the pipes / hoses
◦Recommissioning of the aggregate
(see chapter 6.5, page 15)
7.3 Service / Support
For maintenance and repair work, please contact our service.
When returning the unit following must be observed:
•Unit must be emptied
(see chapter 6.4, „Draining the unit“)
•Unit must be cleaned inside and outside
(see chapter 7.2, page 17)
•Unit must not be disassembled and must be supplied
with all the necessary parts
•he identification of the unit on the nameplate must
be unrestricted
•a duly completed "Declaration of Harmlessness"
must be accompanied by any declining aggregate
•For returning the original packaging should be used
7.4 Spare parts
As spare parts, only the bearings and seals are provided (see
Figure 10, page 24). If other parts are necessary for the
maintenance contact your responsible representative of the
SKV-tec GmbH to determine whether a repair is economically
or whether a replacement can be considered.
When ordering spare parts and accessories following
information is required:
•complete model code of the unit using the nameplate
(see chapter 3.1, page 6)
•Serial number (S/N) of the aggregate
(see chapter 3.1, page 6)
•Position and parts designation
Commercially available standard parts can be purchased in
free trade.
08/2015 SKV-LRG-Series 17/26

SKV-tec Gm H Operating Instructions
7.5 Disassem ly of the unit
DANGER
Electrical danger!
he electrical connection must be performed by
qualified electricians!
Before starting work on the unit following actions
must be performed:
•Disconnect unit from the mains
•Ensure the absence of voltage
•Secure against restarting
•Earth and short circuit
•Cover and safeguard neighboring live
parts
WARNING
Risk of injuries when the engine is running!
During operation the unit must not be touched!
During operation, no work may be performed
on the unit!
Risk due to pressure and vacuum!
Risk caused y escaping media!
Before starting work on the unit:
•Supply of operating fluid closed
•Unit and pipes depressurised
Before disassembly work on the unit the following conditions
must be met:
•he safety instructions must be observed
•he unit is shut down and disconnected from the
mains
•he operating fluid of the unit is drained
•connected pipes / hoses and equipment such as
separators, pressure gauge, etc. are disassembled
•he unit has been removed from the system and is
on a clean, flat assembly area
(1) Disassembling the casing cover
◦Put aggregate on the fan housing
◦Loosen and remove the 4 hexagon screws with
a wrench SW10
◦Removal of the casing cover
(2) Disassembling the impeller
◦Pull the impeller using a suitable detaching
device from the motor shaft
◦Remove shaft key from the motor shaft
(3) Disassembling the water flow plate
◦ake the water flow plate from the connection
housing
◦Remove the o-ring
(4) Disassembling of the valve flap
(5) Disassembling of the mechanical seal
◦Remove the retaining ring from the shaft
◦Pulling the movable sealing part including the
compression spring
◦Press out the immovable sealing part of the
connection housing
(6) Disassembly of the pump side bearing
◦Loosen and remove the 4 hexagon socket
screws
◦Removing the connection housing
◦Remove the retaining ring
◦Pulling the bearing out of the connection
housing
Disassembling the motor-side bearing
◦Set up unit horizontally
◦Remove the fan cover
◦Loosen and pull off the fan from the motor shaft
◦Loosen the screws of the motor cover and
remove the motor cover
◦Pulling off the rolling bearing of the motor shaft
08/2015 SKV-LRG-Series 18/26

SKV-tec Gm H Operating Instructions
7.6 Assem ling of the unit
CAUTION
Risk of material damage due to improper
assem ly!
 Assemble the unit according to the
guidelines for engineering!
 Use only original parts!
 Carry out the assembly on a clean, level
assembly area!
Furthermore, please note the following:
•worn parts must be replaced by original Spare Parts
•use only functional and tested parts
•Seals generally must be replaced
•all parts have to be cleaned
•the necessary tightening torques are to be observed
(1) Assembly of the pump side bearing
◦Put aggregate on the fan housing
◦Pressing the bearing into the connection
housing
◦Insert the retaining ring
◦Align the connection housing on the motor
housing
◦ightening the connection housing with the 4
hexagon socket screws
(2) Assembling of the mechanical seal
◦Moisten the sealing surface of the stationary
sealing part with lubricant (water, alcohol)
◦Pass the stationary sealing part over the shaft to
seal seat in the connection housing and press it
in with a grouting aid
◦Moisten the sealing surface of the movable
sealing part with lubricant (lubricant with P FE)
◦Lead the movable sealing part including the
compression spring with a spiraling motion
through the shaft
◦Load washer
◦Inserting the retaining ring in the shaft groove
(3) Assembling of the valve flap
◦Position the valve flap according to the
orientation pins and press it into the connection
housing
(4) Assembling the water flow plate
◦Position the water flow plate according to the
orientation pins and press it into the connection
housing
◦Insert o-ring into the groove between connection
housing and water flow plate
(5) Assembling the impeller
◦Insert shaft key in the motor shaft
◦Press the impeller with a suitable tool on the
motor shaft (cover disc facing up)
(6) Assembling the casing cover
◦Align the casing cover on the connection
housing (in accordance with the flow arrows)
◦ightening the cover with the 4 hexagon screws
(SW10)
Assembling the motor-side bearing
◦Set up unit horizontally
◦Pressing the rolling bearing on the motor shaft
◦Align the motor cover and screw it to the motor
housing
◦Pressing the fan on the motor shaft
◦Reassembly of the fan cover
08/2015 SKV-LRG-Series 19/26

SKV-tec Gm H Operating Instructions
8 Trou leshooting
DANGER
Electrical danger!
he electrical connection must be performed by
qualified electricians!
Before starting work on the unit following
actions must be performed:
•Disconnect unit from the mains
•Ensure the absence of voltage
•Secure against restarting
•Earth and short circuit
•Cover and safeguard neighboring live
parts
WARNING
Risk of injuries when the engine is running!
During operation the unit must not be touched!
During operation, no work may be performed
on the unit!
Risk due to pressure and vacuum!
Risk caused y escaping media!
Before starting work on the unit:
•Supply of operating fluid closed
•Unit and pipes depressurised
If the operator of the unit can not resolve the disturbance, the contact person responsible for the maintenance of the unit is to be
contacted.
If the problem can not be resolved, contact your responsible representation of the SKV-tec GmbH!
Defect Cause Rectification
Engine will not start
(no running noise)
At least two phases of the power supply are
interrupted
Check the power supply and eliminate interruption
One phase of the power supply is
interrupted
Check the power supply and eliminate interruption
Motor protection switch has triggered Check the motor and switch on protection switch again
Motor blocked Check the motor
Engine does not start
(humming noise)
Rusted impeller and / or connection housing Use of rust remover to loosen the blockade
Iced pump Careful heating and defrosting of the aggregate
Impeller is stucked Free the shaft by rotation (see chapter 7.2, page 17)
Contamination of the pump Clean the aggregate (see chapter 7.2, page 17)
Calcification of the pump Decalcifying of the aggregate (see chapter 7.2, page 17)
defective impeller Replace impeller (see chapter 7.5, page 18)
Defective motor bearings Replace motor bearings
Motor protection
switch triggers
Motor overload Verification / throttling the operating fluid stream
Short circuit in the motor winding Checking the motor winding
Incorrect setting of the motor protection
switch
Check settings, if necessary, replace the motor
protection switch
Excessive back pressure in the pressure
side connection
Reduce back pressure
Excessive share of fluid Reduce the share of fluid
Blocked / Plugged suction side Open / freely accessible suction side
Motor / pump blocked See "Engine does not start"
08/2015 SKV-LRG-Series 20/26