GEA DURIETTA 0 User manual

GEA Hilge
GEA Hilge
DURIETTA 0
Installation and operating instructions English
Translation of the original operating manual
BA.012.KYY.001.03.17.GB
engineering fora better world

1/1
EC - Declaration of conformity for machines
in accordance with EC Machinery Directive 2006/42 /EC, Annex II 1. A
Manufacturer: HILGE GmbH & Co. KG
Hilgestraße 37-47
55294 Bodenheim, Germany
We, as manufacturer, declare in sole responsibility that the machinery
Product:
Model:
Type
complies to all relevant provisions of this and the following directives:
Relevant EC
Regulations: 2006/42/EC EC Machinery Directive
Applied harmonized
standards, in particular: EN 809:1998/A1+AC(D)
EN ISO 12100:2010
Remarks: We also declare that the special technical documentation for this incomplete machine
has been created in accordance with Annex VII, Part B and we obligate to provide these
upon reasoned request from the individual national authorities by data transfer.
Authorized person for compiling and handing over
technical documentation:
HILGE GmbH & Co.KG
Hilgestraße 37-47
55294 Bodenheim, Germany
Bodenheim, 2016-03-29
Franz Bürmann
Managing Director GEA Hilge
Centrifugal pump GEA
Hilge DUIETTA 0
K, K-SUPER

1. Introduction _________________________________________________ 5
1.1 Target group_________________________________________________________________5
1.2 Symbols and formatting ________________________________________________________5
1.3 References to the document ____________________________________________________5
2. Safety ______________________________________________________ 6
2.1 Instructions for the operator _____________________________________________________6
2.1.1 General information_______________________________________________________6
2.2 Safety instructions in the operating manual _________________________________________6
2.3 Identification of instructions in the operating manual __________________________________7
2.3.1 Structure of safety instructions ______________________________________________7
2.4 Qualifications and training of personnel ___________________________________________8
2.5 Hazards caused by failure to follow the safety instructions _____________________________8
2.6 Safety-conscious work ________________________________________________________8
2.7 Safety instructions for the operator / user __________________________________________9
2.8 Unauthorised modifications and production of spare parts _____________________________9
2.9 Improper operation____________________________________________________________9
2.10 Transport _________________________________________________________________10
2.11 Cleaning__________________________________________________________________10
2.12 Repair contract_____________________________________________________________11
3. Product description__________________________________________ 12
3.1 Pump overview______________________________________________________________12
3.2 Description _________________________________________________________________12
3.2.1 Areas of application______________________________________________________12
3.3 Proper usage _______________________________________________________________13
3.3.1 Pumped liquids _________________________________________________________13
3.3.2 Minimum flow rate Qmin ___________________________________________________13
3.3.3 Connections and pipelines ________________________________________________13
3.3.4 Motor activation _________________________________________________________13
3.3.5 Design ________________________________________________________________13
3.4 Technical data ______________________________________________________________13
3.4.1 Pump denomination _____________________________________________________14
3.4.2 Pump serial number _____________________________________________________14
3.4.3 Nameplate _____________________________________________________________14
3.4.4 Performance data _______________________________________________________14
3.4.5 Weights _______________________________________________________________15
3.4.6 Noise emissions ________________________________________________________16
3.4.7 Maximum operating temperature ___________________________________________16
3.4.8 Maximum operating pressure ______________________________________________17
4. Mounting, installation and connection __________________________ 18
4.1 Inspection before pump installation ______________________________________________18
4.1.1 Check failure-free running of the impeller _____________________________________18
4.2 Set-up and alignment of the pump assembly_______________________________________18
4.3 Installation in the pipeline______________________________________________________19
4.3.1 Space requirements _____________________________________________________21
4.3.2 Reduction of noise and vibration ____________________________________________22
4.4 Connections for flushing system ________________________________________________23
4.4.1 Double mechanical seal __________________________________________________23
4.5 Electrical connections ________________________________________________________24
4.5.1 Star connection _________________________________________________________24
4.5.2 Delta connection ________________________________________________________24
4.5.3 Checking the direction of rotation after connection ______________________________25

5. Start-up / shut-down__________________________________________26
5.1 Start-up ___________________________________________________________________ 26
5.1.1 Check application conditions ______________________________________________ 26
5.1.2 Starting up the pump ____________________________________________________ 26
5.1.3 Functional check of the mechanical seal _____________________________________ 26
5.2 Shut-down _________________________________________________________________ 27
5.2.1 Shutting down the pump __________________________________________________ 27
5.2.2 Cleaning the pump after shut-down _________________________________________ 27
6. Maintenance / servicing_______________________________________28
6.1 Safety instructions for maintenance, inspection and installation work____________________ 28
6.2 Maintenance of the pump _____________________________________________________ 29
6.3 Maintenance of the motor _____________________________________________________ 29
6.4 Disassembly / Assembly ______________________________________________________ 30
6.4.1 Parts overview _________________________________________________________ 30
6.4.2 Instructions for disassembly _______________________________________________ 31
6.4.3 Instructions for assembly _________________________________________________ 31
6.4.4 Disassembly of the pump _________________________________________________ 32
6.4.5 Assembly of the pump ___________________________________________________ 35
6.5 Troubleshooting_____________________________________________________________ 39
6.6 Disposal___________________________________________________________________ 40
6.7 HILGE assembly tool kit ______________________________________________________ 41
6.7.1 Content and use ________________________________________________________ 41
7. Certificate of non-objection____________________________________42
7.1 Certificate of non-objection ____________________________________________________ 42

Introduction
5
BA.012.KYY.001.02.10.GB
1. Introduction
1.1 Target group This operating manual is intended for:
• the operators of the pump
• maintenance and repair personnel.
It is assumed that all such personnel will have the basic tech-
nical background required for the start-up, maintenance, and
repair of pump systems.
Sections intended only for specially authorised personnel are
indicated by a preceding notation to this effect.
1.2 Symbols and formatting The following symbols and formats are intended to make it
easier to read this document:
• Listed items
Instructions Instructions that must be carried out in a specific sequence
are numbered in the corresponding order.
*
Important information and helpful tips are identified with the
index finger symbol.
Safety instructions The system used to identify safety instructions is described in
section 2.3 on page 7.
1.3 References to the document
Copyright This document may not be copied, translated into other lan-
guages, or made available to third parties without our explicit
written approval.
Technical changes Design variants, technical data, and spare part numbers are
subject to technical change.
The right to make changes for the sake of further technical de-
velopment is reserved.
Overview
This section describes the requirements that are important for reading and understanding this manual. You will
learn the symbols and formats that make the reading easier.

Safety
6BA.012.KYY.001.02.10.GB
2. Safety
2.1 Instructions for the operator
2.1.1 General information All our pumps are professionally packed before they leave our
warehouse to avoid damage during transport.
Unpacking If, after carefully unpacking and inspecting the shipment, you
however find damage, you must promptly inform the shipping
agent (railway, post office, lorry driver, shipping line, etc.).
Your claim should be filed with the shipping agent. The ship-
ping risk passes to the customer as soon as the shipment
leaves our warehouse.
Storage If the pump is not put into service immediately, it is important
that it is stored properly to ensure that it will function correctly
later. This is just as important as proper installation and main-
tenance.
The pump must be protected from cold, moisture, and dust as
well as from mechanical influences.
Specially trained personnel is required to install and maintain
the pump properly.
2.2 Safety instructions in the
operating manual
Read safety instructions! The operating manual contains all the basic information re-
quired for the set-up, operation, and maintenance of the
pump. The installer as well as the technical personnel or op-
erator responsible for the pump must therefore read this man-
ual before installing and starting the pump. The operating
manual must always be available at the site where the ma-
chine/system is used. The general safety instructions pre-
sented in this section as well as the specific safety
instructions in later sections must be followed.
Overview
This section describes what you have to consider for your own safety. You will learn the structure and identifica-
tion of safety instructions. Read this important section attentively!

Safety
7
BA.012.KYY.001.02.10.GB
2.3 Identification of instructions in
the operating manual
Symbol The safety instructions presented in this operating manual are
identified as shown below.
K.0319V1 | K.0320V1
Fig. 1 Symbol for safety intructions
A: FailureL to follow these safety instructions can endanger personnel.
B: Safety instructions which involve warnings against electrical voltage.
C: Failure to follow these safety instructions can endanger the machine
and its operation.
Signal words In order to classify the safety labels, they are distinguished by
the following signal words:
•Danger
Characterises an imminent hazard with a high risk which
can cause death or grievous bodily harm.
•Warning
Characterises a possible hazard with medium-high risk
which can cause death or bodily harm if it is not avoided.
•Caution
Characterises a hazard with minor risk which can cause
minor or medium-level bodily harm if it is not avoided.
Do not remove instructions from machine Instructions attached directly to the machine, such as direc-
tion-of-rotation arrow, must be noted and kept in completely
legible condition.
Damaged or illegible instructions must be replaced.
2.3.1 Structure of safety instructions
WARNING
!
Description of danger!
SPossible consequence.
ZAction to eliminate the danger.
Example:
DANGER Electrical shock if electrical parts are touched!
SDeath, serious bodily injury, damage to property.
ZBefore attempting to diagnose any fault, make sure that
the main switch has been switched off. It must be ensured
that the electricity supply cannot be accidentally switched
on.
ATTENTION
ABC
!

Safety
8BA.012.KYY.001.02.10.GB
2.4 Qualifications and training of
personnel The employees operating, maintaining, inspecting, and in-
stalling the pump must have the appropriate qualifications for
this work. The operator must define in detail the tasks for
which the employees are responsible, the tasks of which they
are in charge, and the manner in which they are supervised.
If the employees do not have the necessary knowledge, they
must be instructed and trained accordingly. This can be done,
if necessary, by the manufacturer/supplier under contract to
the operator. The operator must also guarantee that the em-
ployees fully understand the contents of the operating manu-
al.
2.5 Hazards caused by failure to
follow the safety instructions If these safety instructions are not followed employees, the
machine itself and the environment will be in danger.
Failure to follow the safety instructions can lead to the loss of
the right to file claims for damages.
Failure to follow instructions can, for example, lead in partic-
ular to the following hazards:
• Breakdown of important functions of the machine/system
• Failure of recommended methods of maintenance and
repair
• Endangerment of personnel by electrical, mechanical,
and chemical hazards
• Endangerment of the environment by leakage of hazard-
ous materials.
2.6 Safety-conscious work The safety instructions given in this operating manual, the ex-
isting national regulations for accident prevention, and any
applicable internal working, operating, and safety instructions
of the operator must be followed.

Safety
9
BA.012.KYY.001.02.10.GB
2.7 Safety instructions for the
operator / user
WARNING
!
Hot or cold mechanical components!
SSerious bodily injury.
ZTake structural measures to prevent contact with them!
WARNING
!
Trapping hazard!
SDeath, serious bodily injury, damage to property.
ZDo not remove protection against contact with moving
parts (e.g. coupling guard) while the machine is operating.
ZReplace defective safety equipment immediately.
WARNING
!
Contact with hazard substances (e. g. inhale)!
SDeath, serious bodily injury, damage to property.
ZDrain away leakage of hazardous pumped media in such
a way that there is no danger to personnel or to the envi-
ronment.
ZFollow legal regulations.
ZIf shaft seal fails, switch off the pump. Replace seal before
next start-up.
CAUTION
!
Tripping hazard from electric power cable!
SDeath, serious bodily injury.
ZRoute the electric power cable in such a way that no one
can trip over it (in case of portable pumps).
WARNING Electrical hazard!
SDeath, serious bodily injury.
ZOnly use acceptable electric cables and plugs.
2.8 Unauthorised modifications
and production of spare parts No modifications or changes to the machine may be made
without written approval of the manufacturer. In the interest of
safety, only original spare parts and accessories authorised
by the manufacturer may be used. The use of other parts can
exempt the manufacturer from liability for damage.
2.9 Improper operation The operational reliability of the delivered machine can be
guaranteed only when it is used properly as indicated in the
following sections.
*
The given limit values may not be exceeded under any cir-
cumstances.

Safety
10 BA.012.KYY.001.02.10.GB
2.10 Transport
WARNING
!
Falling loads!
SDeath, serious bodily injury, damage to property.
ZTransport work must only be performed by persons quali-
fied to do so, and all safety instructions must be observed.
ZUse suitable load carrying equipment with sufficient ca-
pacity to transport the pump.
ZMake certain there are no persons under the suspended
load.
ZMake certain the pump is aligned horizontally during lift-
ting.
ATTENTION Incorrect lifting points!
SDamage to property.
ZFasten the rope to suitable lifting points.
ZNever fasten a rope to the pump casing or intake/dis-
charge branch.
ZIn case of SUPER design1, remove shroud before trans-
porting the pump.
2.11 Cleaning CIP and SIP methods must be in accordance with the latest
current guidelines of the EC.
When special cleaning agents and methods are used, the
supplier must confirm that they are safe for the materials in-
volved.
WARNING
!
Pressure surge!
SDeath, serious bodily injury, damage to property.
ZBefore sterilisation, always evacuate the system com-
pletely!
1. Option.

Safety
11
BA.012.KYY.001.02.10.GB
2.12 Repair contract The duty to follow the legal regulations on work safety and the
regulations on environmental protection means that all com-
mercial enterprises must protect their employees, the public
at large, and the environment from the harmful effects of haz-
ardous materials.
Examples of legal regulations on work safety:
• the Workplace Act (ArbStättV)
• the Hazardous Materials Act (GefStoffV)
• the accident prevention regulations (BGV A1)
• all applicable laws, rules, guidelines, regulations etc. in
the country of operation.
Examples of regulations on environmental protection:
• the Recycling and Waste Law (KrW/AbfG)
• the Water Economy Law (WHG)
• all applicable laws, rules, guidelines, regulations etc. in
the country of operation.
Certificate of non-objection The certificate of non-objection attached to the shipment is a
component of the inspection/repair contract. This does not af-
fect our right to refuse acceptance of this contract for other
reasons.
The certificate of non-objection can be found on page 42.
HILGE products and their parts will only be inspected/re-
paired if the certificate of non-objection is present and has
been correctly completed by authorised and qualified techni-
cal personnel.
Pumps which have been operated in media exposed to radi-
ation will not be accepted.
If any additional safety measures are required even after the
careful draining and cleaning of the pump, the necessary in-
formation must be provided.

Product description
12 BA.012.KYY.001.02.10.GB
3. Product description
3.1 Pump overview
K.0378V1
Fig. 2 Parts overview
0107 discharge casing
0112 diffusor casing
0153 suction branch
0156 discharge branch
0162 suction cover
0680 shroud
0801 flanged motor
0905 tie bolt
3.2 Description The pump is a single- or multi-stage centrifugal pump of end-
suction type with a modular design.
3.2.1 Areas of application
Standard design Pumps of the standard design are used for:
• industrial application
• textile technology
• all systems and processes involved in the food product,
dairy, and beverage industries.
Overview
This section describes the pump as well as it’s design and application. Section „Technical Data“ describes limits
for application. You must know and keep these limits.
0801
0112
0107
0905
0162
0680
0107
0162
0153
0156

Product description
13
BA.012.KYY.001.02.10.GB
3.3 Proper usage
WARNING
!
Improper usage!
SDeath, serious bodily injury, damage to property.
ZPump only media that are specified in the order. The
pump has been specially designed for that purpose.
ZOperate the pump only in the electrical network specified
in the order.
3.3.1 Pumped liquids Only pure or slightly contaminated liquids with a maximum
particle size of 0.4 mm may be pumped. These liquids may
not chemically or mechanically attack the pump materials or
lower their strength. If liquids with a viscosity greater than that
of water are to be pumped, make sure that the motor will not
be overloaded. The pump may not be operated beyond the
maximum permissible values. Even short periods of pressure
overload (e.g. as a result of a pressure surge) should be
avoided.
3.3.2 Minimum flow rate Qmin Do not operate the pump below the minimum flow rate of
Qmin =10-15%Q
opt.
3.3.3 Connections and pipelines The nominal diameters of the system pipelines should be
equal to or greater than the nominal diameters of the pump,
i.e., DNE (suction side) and DNA (pressure side), and the
connecting elements to the pump must conform exactly to the
design standard/specification of the mating connector piece
installed on the pump. The suction line must be absolutely
leak-tight and if possible laid in such a way that no air pockets
can form. Avoid tight elbows and do not install valves imme-
diately upstream of the pump. The suction head of the system
may not be greater than the suction head guaranteed by the
pump.
3.3.4 Motor activation Do not start and stop the motor more than 15 times per hour.
3.3.5 Design All information and descriptions in this operating manual con-
cerning the use and operation of the pumps are based exclu-
sively on the standard designs.
These rules do not apply to special designs, customer specif-
ic modifications, or random external influences that may oc-
cur during use and operation.
3.4 Technical data
WARNING
!
Overloading the pump!
SDeath, serious bodily injury, damage to property.
ZUse the pump only under the indicated operating condi-
tions.
ZAlso avoid short overpressure situation (e.g. caused by
pressure surges).

Product description
14 BA.012.KYY.001.02.10.GB
3.4.1 Pump denomination The HILGE pump denomination is structured as shown be-
low:
3.4.2 Pump serial number The pump can be identified by the pump serial number. When
ordering spare parts, always state the pump serial number.
Pump serial number (example) 012 / 08 / 1248
The pump serial number includes:
• pump type (012)
• year of manufacture (08)
• registration number (1248)
3.4.3 Nameplate
K.0109V2
Fig. 3 HILGE nameplate, example
1 - pump type
2 - pump serial number
3 - capacity Q
4 - head H
5 - motor power P
6 - drive speed n
7 - number of operating manual
NOTE: The nameplate can deviate from the nameplate shown.
3.4.4 Performance data The performance data of the pump, head and delivery rate,
are determined in accordance with DIN EN ISO 9906 - ap-
pendix A, class 2, and documented on the acceptance
records.
durietta 0 K 32/25 0.55 2
pump type
size
design
nominal diameter DNs/ DND
power [kW]
number of poles
Tab. 1 HILGE pump denomination (example)
Pump-Type
No.
Q m3/h H
P kW n min-1
Doc.-No.
MADE BY HILGE
Hilgestraße-D-55294 Bodenheim
HILGE GmbH & Co. KG

Product description
15
BA.012.KYY.001.02.10.GB
3.4.5 Weights Design features of the described standard pumps:
Caution:
The weights can - depending on design and accessories - dif-
fer from those presented. The manufacturer gives you when
given the pump / order number precise information.
• Motor foot mounting
• Single mechanical seal
• SIEMENS motor
Stage Motor power[kW] Number of poles Motor size Weight [kg]
1 0,25 4 071Y 12
1 0,55 2 071Y 14
1 0,75 2 071Y 14
2 0,55 2 071Y 13
2 0,75 2 071Y 13
2 1,5 2 080Y 13
3 0,75 2 071Y 14
3 1,1 2 080Y 16
3 1,5 2 080Y 14
3 2,2 2 090L 14
4 1,1 2 080Y 17
4 1,5 2 090S 15
4 2,2 2 090L 18
5 1,5 2 080Y 16
5 2,2 2 090L 18
6 2,2 2 090L 21
Tab. 2 Weights

Product description
16 BA.012.KYY.001.02.10.GB
3.4.6 Noise emissions Measured values according to DIN EN ISO 3746 for pump
units; uncertainty of measurement 3dB (A).
Noise emissions caused by a pump are significantly affected
by its application and construction. For this reason, no
guarantee of accuracy is given for the values indicated here.
3.4.7 Maximum operating temperature
WARNING
!
Exceeding the max. permissible operating temperature!
SDeath, serious bodily injury, damage to property.
ZNever exceed the specified operating temperatures.
Variations of those mentioned temperatures are possible.
See order papers for applicable values.
Motor
power
kW
Lpfa
[dB (A)]
1. Stage 2. Stage 3. Stage 4. Stage 5. Stage 6. Stage
0,55 60 62 62 64 65 65
0,75 61 61 64 65 67 69
1,1616263666870
1,5626264666871
2,2646466697274
3676870747576
Tab. 3 Noise emissions - 2 poles
Motor
power
kW
Lpfa
[dB (A)]
1. Stage 2. Stage 3. Stage 4. Stage 5. Stage 6. Stage
0,25 50 50 51 51 52 53
Tab. 4 Noise emissions - 4 poles
Design Temp. [° C]
Standard design 95
Special design 150
Sterilization (SIP) 140
Tab. 5 Operating temperatures

Product description
17
BA.012.KYY.001.02.10.GB
3.4.8 Maximum operating pressure
WARNING
!
Pressure overload!
SDeath, serious bodily injury, damage to property.
ZThe pump must be operated according to the order pdata.
ZNever exceed the specified maximum operating pres-
sures.
Pump operating pressure The maximum permissible operating pressure depends on
various factors:
• pump type
• design of connections
• design of mechanical seal.
For the values that apply to your pump, please refer to the or-
der documents.

Mounting, installation and connection
18 BA.012.KYY.001.02.10.GB
4. Mounting, installation and connection
4.1 Inspection before pump
installation
4.1.1 Check failure-free running of the
impeller Check the failure-free impeller running in this way:
1. Remove fan cover of motor.
2. Consider direction of rotation (arrow).
3. Rotate shaft slowly by hand via the fan.
The shaft must rotate easily. If the impeller rubs against
the pump casing (for example due to transport damage) it
has been damaged.
When the impeller rubs against the casing, contact
HILGE Service.
When the impeller runs failure-free:
4. Re-fit fan cover of the motor.
4.2 Set-up and alignment of the
pump assembly
WARNING
!
Misalignment of the pump due to improper foundation!
SDeath, serious bodily injury, damage to property.
ZEnsure that the foundation on which the pump is set up is
clean and flat and has sufficient load capacity.
ZMount the pump – especially when it is to be set up verti-
cally1– with the use of suitable heavy-duty anchors. As
the centre of gravity is higher, the pump can tip.
ZThe mounting points provided must be bolted to the foun-
dation according to the standard rules of mechanical en-
gineering to ensure the satisfactory set-up of the pump.
WARNING
!
Short circuit!
SDeath, serious bodily injury, damage to property.
ZIn case of vertical installation never position the motor un-
derneath the pump. If there is leakage, the motor could be
damaged.
Overview
This section is intended for maintenance and repair personnel.
This section describes how to mount, adjust and install the pump. You get to know what to consider when you
connect the pump to the electric mains supply and how to improve the flow in order to avoid dry running of the
shaft seals.
1. Not applicable to F&B-HYGIA®, SIPLA, NOVAlobe and for all base plate design (CN).

Mounting, installation and connection
19
BA.012.KYY.001.02.10.GB
Align the pump in this way:
1. Use an engineer’s spirit level laid across the machined
surface of the discharge branch connection to align the
assembly.
2. After aligning the assembly, tighten the mounting bolts
uniformly in a crosswise manner.
4.3 Installation in the pipeline
WARNING
!
Mechanical overload!
SDeath, bodily injury or damage to property.
ZDo not use the pump or its connecting sleeves to support
the pipeline. (EN 809 5.2.1.2.3 and EN ISO 14847).
ZIn addition to the general rules of machine-building and
plant construction, also follow the instructions provided by
the manufacturer of the connecting elements used (e.g.,
flanges) when installing the pump in the pipeline or plant.
These specifications will contain data on torques, maxi-
mum permissible angular offset and tools / auxiliary mate-
rials to be used.
ZAfter connecting the pipes, check the alignment of the
coupling1.
ZIt is absolutely necessary to avoid twisting the pump.
ATTENTION Mechanical overload due to foreign objects!
SDamage to property.
ZThe suction and delivery ports are sealed with sheets of
plastic, the flushing and drain lines with plastic caps.
These must be removed before the pump is installed in
the system.
1. For base plate design (CN) only

Mounting, installation and connection
20 BA.012.KYY.001.02.10.GB
Details about dry running What is dry running?
To seal the pump shaft against the pump casing the mechan-
ical seal needs lubrication between its rotating faces.
This lubrication is provided by the pumped liquid. If the pump
is fitted with a quench, the lubrication for the quench must be
provided from an external source.
Dry running occurs when the lubrication fails. Dry running de-
stroys the mechanical seal in few seconds.
K.0075V2
Fig. 4 Lubrication between sliding surfaces
P - pump side
0433.00 - mechanical seal
L - lubrication
A - atmosphere side
ATTENTION Dry running!
SDamage to property.
ZThe suction line must be absolutely leakproof and laid in
such a way that no air pockets can form.
ZAvoid tight elbows and valves immediately upstream of
the pump. They interfere with the incoming flow to the
pump and thus with the NPSH of the system.
ZThe head of the system may not be greater than the head
guaranteed by the pump.
ZThe head of the system may not be greater than the head
guaranteed by the pump.
ZThe nominal pipeline diameters of the system should be
equal to or greater than the DNS or DND connectors of
the pump.
ZA foot valve should be used in suction mode.
ZTo prevent air pockets from forming, the suction line must
be laid so that it rises to the pump; a gravity feed line must
be laid with a slight downward gradient to the pump.
ZIf local conditions do not allow the suction line to ascend
continuously, install a venting device at the highest point
of the line.
ZA shut-off valve should be installed in the suction line near
the pump. This valve must be completely open during op-
eration and may never be used as a control valve.
ZA shut-off valve should be installed in the discharge line,
near the pump, to control the delivery rate.
PA
0433.00
L