Goulds Pumps 3311 User Manual
Installation, Operations, and Maintenance Instructions
Model 3311
TABLE OF CONTENTS
PAGE SECTION
3 SAFETY INSTRUCTIONS 1
5 APPLICATION 2
7 SYSTEM LAYOUT 3
12 UNPACKING, HANDLING, STORAGE 4
14 PUMP INSTALLATION 5
17 STARTING AND STOPPING PROCEDURES 6
19 MAINTENANCE, DISASSEMBLY, ASSEMBLY 7
30 LOCATING TROUBLES 8
31 SECTIONAL DRAWING / PARTS LIST 9
Please note: Only trained and skilled operating personnel are allowed to install and operate this
pump or pump set. Compliance with these operating instructions and all applicable
rules and regulations must be ensured.
If you fail to comply with these operating instructions:
• people may be put at risk
• the pump or pump set may be damaged
• the manufacturer shall not be held liable for damage caused by non-compliance.
2
1 Safety Instructions
1.1 Safety instructions
This manual gives basic instructions which must be
observed during installation, operation and maintenance
of the pump.
It is therefore imperative that this manual be read by the
installer and the responsible personnel or operators prior
to installation and commissioning. It must always be
available on site.
Within this manual, safety instructions are marked with
safety symbols.
Safety symbol to ISO 3864-B.3.1
This general hazard symbol highlights information noncompliance with which could cause a risk to personal
safety.
Safety symbol to ISO 3864-B.3.6
This symbol refers to electrical hazards.
CAUTION
This word gives warning of a hazard to the machine.
Signs affixed to the machine, e.g.
- arrow indicating the direction of rotation
- symbols indicating fluid connections
must be visible and kept legible.
1.2 Qualification and training of
operating personnel
The personnel responsible for operation, maintenance,
inspection and assembly must be properly trained and
qualified.
The responsibilities of the operating personnel must be
exactly defined by the plant operator. If the staff does not
have the necessary knowledge, they must be trained and
instructed, which may be performed by the machine
manufacturer or the supplier on behalf of the plant
operator, if required. Moreover, the plant operator is to
make sure that the contents of this manual are fully
understood by the operating personnel.
1.3 Hazards in the event of non-
compliance with the safety
instructions
Non-compliance with the safety instructions may cause a
risk to personnel as well as to the environment and the
machine. Non-compliance may result in a loss of any
right to claim damages.
For example, non-compliance may involve the following
hazards:
- failure of important functions of the equipment;
- failure of specified maintenance and repair procedures;
- electrical, mechanical and chemical hazards affecting
personal safety;
- leakage of environmentally damaging substances.
1.4 Safety at work
When operating the pump, the safety instructions
contained in this manual, the relevant national accident
prevention regulations and any other service and safety
instructions issued by the plant operator must be
observed.
3
1.5 Safety instructions relevant to
operation
- If hot or cold machine components involve hazards, the
customer must ensure these components are guarded
against accidental contact.
- Guards for moving parts (e.g. coupling) must not be
removed from the machine while in operation.
- Any leakage of hazardous (e.g. explosive, toxic, hot)
fluids (e.g. from the shaft seal) must be drained away
so as to prevent any risk to personal safety or the
environment. Statutory regulations must be complied
with.
- Hazards resulting from electricity must be prevented.
Local regulations must be complied with.
1.6 Safety instructions relating to
maintenance, inspection and assembly
work
It shall be the plant operator's responsibility to ensure that
all maintenance, inspection and assembly work is
performed by authorized and qualified personnel who
have adequately familiarized themselves with the subject
matter by studying this manual in detail.
Any work on the machine shall only be performed when it
is not operating and has been properly secured from
starting. Always lock out power to the driver before
performing pump maintenance. The procedure for
stopping the machine described in this manual must be
followed.
Pumps which handle hazardous fluids must be
decontaminated.
On completion of work all safety and protective
equipment must be re-installed and made operative again.
Prior to restarting the machine, the instructions listed
under sub-section 6.4 "Checks before first start-up" must
be observed.
1.7 Unauthorized alterations and
production of spare parts
Any modification to the machine is permissible only after
consultation with Gould’s Pumps.
Using genuine spare parts and accessories authorized by
the manufacturer is in the interest of safety. Use of other
parts may exempt the manufacturer from any liability.
1.8 Unauthorized use
Goulds Pumps, inc. will not be liable for any damages or
delay caused by failure to comply with the provisions of
this instruction manual. The pump is not to be operated at
speeds, working pressures, discharge pressures or
temperatures higher than, nor used with liquids other than,
stated in the original order acknowledgement or the
conditions of service for which it was quoted without
written permission from Goulds Pumps.
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2 Application
2.1 Limitation of use
Operation of the pump must be limited to the application
and operating conditions stated by the purchaser and
confirmed on the manufacturer's data sheet. The pump is
covered by warranty under Gould’s Pumps’ conditions of
sale.
2.2 Wrong use
• Operate the pump only for the application stated on
the data sheet. Operation outside these limits of
product application will increase the risk to personal
safety and the environment.
CAUTION
• Do not exceed the density stated on the data sheet as
this could cause a motor overload condition.
• Do not operate the pump outside its characteristic
curve so as to avoid pump or motor damage.
2.3 Accessories
The accessories supplied with the pump are indicated on
the data sheet. Other accessories may be mounted to the
pump or the pump set only after Gould’s Pumps' prior
consent.
2.4 Design and working principle
The 3311 high pressure pump of the Goulds multi-stage
line is a horizontal multi-stage ring-section type
centrifugal pump.
It meets the technical requirements according to DIN ISO
5199 / EN 25199.
The pump casings are held together by external tie bolts
and sealed against the atmosphere by O-rings.
The axial thrust is balanced by a hydraulic balancing
device consisting of a disc/drum combination. An
additional lift-off device is available and intended for
special applications. The balancing liquid flows back
through an external line to the suction casing.
Suction nozzle: axial or radial.
In the case of radial suction nozzle orientation, the suction
casing pump feet assembly allows adaptation to the
installation requirements by rotating the casing.
Bearings:
Oil-lubricated anti-friction bearing on the discharge side;
suction side sleeve bearing lubricated by the liquid
handled or oil-lubricated anti-friction bearing.
Shaft seal:
Packed stuffing box or mechanical seal according to DIN
24960.
Drive:
Depending on its design, the pump is either driven from
the discharge side or the suction side, by a customary
electric motor or turbine. The direction of rotation is
counter-clockwise for discharge side drive, and clockwise
for suction side drive, when viewed from drive end.
2.5 Applications
- M unici pal water supply:
Pumping stations, treatment plants, booster units.
- Water treatment:
Filtration, reverse osmosis.
- Pumps for industrial purposes:
General water supply, cold water, boiler feed
installations, hot water, pumping of organic and
inorganic solutions, high-pressure gas washing; power
water generation plants, purifying and cleaning plants,
desalinization plants.
- Power supply:
Small and medium-sized thermal stations, waste
incineration installations.
5
2.6 Nameplate Information
Every pump has a Goulds nameplate that provides
information about the pump. The tags are located on the
pump casing.
When ordering parts, you will need to identify the pump
model, size, serial number, and the item number of the
required parts. Information can be taken from the pump
casing tags. Item numbers can be found later in this
manual.
Pump Casing Tag – provides information about the
pump’s hydraulic characteristics. Note the format of the
pump size: Discharge x Suction – Nominal maximum
Impeller Diameter in inches.
(Example: 2x3-7)
6
3 System Layout
3.1 Pipework
3.1.1 General
In short discharge lines, the nominal diameter should be
such that the piping resistance is only a small proportion
of the discharge head. For long pipelines, the most costeffective solution should be determined on a case-by-case
basis.
Flow velocity guidelines:
Suction line: v
max. 3 m/s
Discharge line: v
Abrupt cross-section transitions or sharp bends should be
avoided. Flow disturbances must be kept to a minimum
when making necessary branches.
Unfavorable pipework layouts may impair the
performance of the pump, especially on the suction side
(e.g. bends in several planes in front of the suction
nozzle).
≈ 1.5 to 2.5 m/s
s
≈ 4 to 6 m/s
D
• The pipework must be independently supported and
positioned such that no excessive forces and moments
are exerted on the pump flanges.
• Excessive loads could result in leakage and be
hazardous to personnel.
CAUTION
• If hot water is handled, excessive pipework loads and
moments can cause a misalignment of the coupling
between pump and driver, thus reducing the operating
safety of the unit.
Once the flange bolts have been released, the flanges must
not yield more than the amount corresponding to the
gasket thickness, nor must they be out of parallel nor bear
against each other under stress. Check that the flange
gaskets do not extend into the interior of the pipe. All pipe
components, valves and fittings and the pump nozzles
should be thoroughly cleaned before assembly.
Air-relief valves and drain valves must be installed in the
suction and discharge lines.
In order to prevent the formation of air pockets,
- a feed line (supply source above the pump) should
slope gradually downward towards the pump;
- a suction line (supply source below the pump) should
gradually rise to the pump.
Shut-off valves must be installed in the suction and
discharge lines and in all pipelines connecting the pump
with the liquid system.
The valves enable the pump to be depressurized and
dismantled without having to drain the system. Flow
regulation at constant speed is permissible from the
discharge side only.
CAUTION
• The pipes should have at least the nominal diameter of
the pump nozzles. Where this is not possible, it should
be ensured that the flow velocity in the suction or feed
line does not exceed 2 - 3 m/s.
• Flange seals must not extend into the interior of the
pipework.
• Clean the pipework prior to pump installation.
• Support the pipelines so as to prevent distortion of
pump components.
• Avoid rough cross-section transitions and sharp bends.
• Eccentric reducers must be used in the event of
different nominal diameters.
• In the event of unfavorable suction conditions, stead y
flow should be ensured over a length of 15 x suction
nozzle diameter upstream from the suction nozzle.
• Shut-off valves in the suction or discharge line must
be fully open during operation and must never be
used to control the flow.
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3.1.2 Suction or feed line
A suction line should rise to the pump and a feed line
should slope gradually downward towards the pump.
Feed operation suction operation
Reducers mounted must be eccentric to eliminate the
possibility of air pockets being formed.
CAUTION
• The strainer is for starting purposes only. Solids which
are smaller than the mesh size will not be retained by
the strainer.
• However, such small particles may collect in the
lateral area of the impeller near the clearances, in
particular if their concentration is high.
• In order to prevent clogging, it is recommended that
the customer provide a sedimentation tank or a larger
flushable fine strainer upstream from the pump.
Design:
Conical strainer with perforated plate support body with
external fine screen, mesh size 0.5 mm, of corrosionresistant material. The fine screen can be removed after
several months of operation, once there are no more
deposits.
For new conical strainers supplied by Gould’s Pumps the
pressure loss can be calculated as follows:
Hv
2
v
ζ
•=
g2
in m
v = medium flow velocity in reference cross-section,
in m/s
ζ = 4, loss coefficient for new conical strainers
Eccentric reducer
If the liquid is contaminated, a filter should be fitted
upstream from the pump whose free-space sectional area
should be three times the pipe cross-sectional area.
8
1 Pump suction nozzle / flange
2 Pipe section for strainer
3 Conical strainer
(installed with its tip against flow direction)
4 Feed line
5 Differential pressure measuring instrument
Feed line with conical strainer
Determining the strainer pressure loss
Example:
Feed line = DN 125
Flow rate 80 m³/h
ζ = 4
v = 1.81 m/s in the feed line
Hv =
2
4
81.1
•
81.92
•
276.3
4
62.19
66.0
=•=
m
The suction line must be leak-proof and it must be
possible to release all air. The suction opening of the
suction line should be well below the liquid level, and a
foot valve with a strainer should be used. The foot valve
must be far enough from the bottom to avoid excessive
inlet losses which could impair performance.
3.1.3 Vacuum equalizing pipe
If the pump draws from a system or tank under vacuum,
an equalizing pipe must be installed connecting the vent
connection at the suction casing or the highest point of the
suction line to a point above the maximum liquid level in
the suction tank.
- The line should be fitted with a shut-off valve which
should only be closed for maintenance work on the
pump.
To assist in starting the pump, we also recommend that a
pipeline, which can be shut off, be installed between the
first stage and the equalizing line.
1 Eccentric reducer (suction operation) or
concentric reducer (feed operation)
2 Shut-off valve
3 Suction line
4 Bend
5 Foot valve
6 Feed line
7 Non-return valve
8 Control valve
Pump installation
A shut-off valve should be installed in the feed line; it is
to be closed for maintenance work.
It should be installed such that air pockets cannot form in
the spindle cap, i.e. with the spindle in a horizontal
position or pointing vertically downward.
a Equalizing line
b Additional line
1 Shut-off valve
2 Shut-off valve (vacuum-tight)
Vacuum operation
3.1.4 Discharge line
For flow control, install a shut-off valve as close to the
pump nozzle as possible. It is recommended that a nonreturn valve be installed between pump nozzle and shutoff valve, thus protecting the pump against reverse
rotation and also the pump and the foot valve against
water hammer that may occur in the event of sudden shutdown.
9
3.1.5 Minimum flow line
The minimum flow line (or bypass line) should be used if
operation with the discharge side shut-off valve closed is
possible. The minimum flow valve ensures that a
sufficient rate is automatically returned to the suction side
tank.
The minimum flow rate is shown on the curves or the data
sheet.
Size t = 140 °C or lower t > 140 °C
2x3-7 20 % of Q
2.5x4-8 20 % of Q
4x5-11 25 % of Q
25 % of Q
BEP
25 % of Q
BEP
25 % of Q
BEP
BEP
BEP
BEP
Should exact calculation be required, please contact
Gould’s Pumps.
CAUTION
• Up to the shut-off or non-return valve, the line should
be designed to suit the nominal pressure of the
discharge line, afterwards in accordance with the
design pressure of the feedwater/suction tank.
• Permissible velocity in the minimum flow line: 7 to 10
m/s.
• If an automatic device (bypass non-return valve) is
used, ensure that even in the case of trouble, liquid can
be returned through the minimum flow line.
• Frequent checks are recommended. Early replacement
of the minimum flow valve (which is exposed to
heavy wear) will prevent energy losses.
• The minimum flow valve should be installed near the
pump discharge nozzle, upstream from the discharge
shut-off valve.
• A non-return valve should be installed in the
minimum flow nozzle or the minimum flow line.
• For repair or overhaul work on the pump or the bypass
non-return valve, a shut-off valve must be installed in
the minimum flow line (c).
a Feed line
b Discharge line
c Bypass line
1 Bypass non-return valve
2 Conical strainer
Minimum flow control
3.1.6 Balancing line
The balancing line connects the discharge side shaft
sealing casing with the suction casing. There is no
throttling or shut-off device in this line, which serves to
hydraulically balance the pump.
The balancing line can also be returned by the customer to
the feed tank or the feed line.
3.1.7 Venting during pump priming
Before starting the set, the pump and the suction line must
be completely vented and filled with the liquid handled.
To bleed the air, several holes with plugs have been
provided. Similar holes may be used in the pip ework. The
shut-off valve in the suction or supply line must be fully
open.
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3.1.8 Cooling
Cooling is required if the temperature of the liquid
handled exceeds 110 °C, if a packed stuf fing box is used,
or 140 °C if a mechanical seal is installed. For this
purpose the pump is equipped with a shaft sealing casing
which can be cooled. The connecting points for the
cooling lines are on the shaft sealing casing. The customer
should provide either an open circuit, i.e. a cooling water
return line to the drain system, or a closed circuit
including a return to the cooling circuit to be provided.
3.1.9 Drain line, leakage water line
The pump has connections for leakage water and drain
lines.
3.1.10 Pressure monitoring
In order to monitor the pressures upstream and
downstream from the pump, the installation of measuring
points in the pipeline is recommended.
3.2 Electrical connections
The electrical connection for the driving motor must be in
compliance with the relevant rules and requirements.
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4 Unpacking, Handling, Storage
4.1 Safety measures
4.4 Handling
The pump or the pump set must be lifted as shown below:
• Do not lift heavy equipment overhead of personnel.
• A safe distance must be kept when lifting and moving
the equipment.
• Use only approved and suitable lifting equipment.
• The length of the lifting equipment should be such
that the pump or the set are lifted in horizontal
position.
• Do not attempt to lift the pump or the pump set using
eyebolts on pump components.
CAUTION
• Do not remove protection covers from the pump
nozzles, as they prevent contamination of the pump.
4.2 Unpacking
Do not unpack the pump until it has been carefully
checked for damage that may have occurred in transit.
Report any damage on the counterfoil or delivery note.
Claims must be made immediately on the carrier or the
transport insurance.
4.3 Intermediate storage
If the pump or the pump set is not to be installed
immediately it should be stored in a clean, dry and
vibration-free room.
The packing should be checked for damage on a monthly
basis.
Lifting the pump
Lifting the pump / motor / baseplate assembly
12
4.5 Preservation
Usually, only iron pumps are preserved.
4.5.1 Removal of preservation
To remove the preservative coating, the pump should be
filled and drained several times using appropriate agents,
e.g. solvent naphta, diesel oil, or an alkaline detergent.
Flush with water, if necessary.
The pump must be installed and put into operation
immediately afterwards.
4.5.2 Re-preservation
If the pump has been supplied preserved and is to be
stored, a new preservative coating should be applied after
six months.
For suitable preservatives, contact Goulds Pumps.
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5 Pump Installation
5.1 Prerequisites
Prior to the installation of the pump, the storage and
handling instructions in Section 4 must have been
complied with.
5.2 Safety measures
• The pipework must be properly installed. Fluid
leakage during operation may cause health hazards or
environmental damage.
• The shut-off valves in the suction or feed line and in
the discharge line must be closed.
• All internal rules and guidelines must be complied
with.
• Hot components must have contact guards.
• Disconnect power to the equipment so as to eliminate
electrical shock hazards!
5.3 General
5.3.1 Fitting tools
Standard tools and lifting equipment are used. These
should be available at the customer's end.
5.3.2 Permissible environment
The ambient temperature range should be from
- 20 °C to + 60 °C.
The atmospheric humidity should be low in order to avoid
corrosion.
5.3.3 Space utilization
The space required by the pump or the pump set can be
seen from the table of dimensions and the arrangement
drawing.
Clear and easy access to the shut-off and regulating
valves and the measuring instruments must be ensured.
5.3.4 Installation position
3311 pumps are installed in horizontal position.
5.3.5 Preparatory checks
The foundation of the pump must be level and have a
minimum of vibration. The consistency of the concrete
should at least correspond to BN15, DIN 1045.
We recommend using a baseplate.
Prior to installation checks should be made with regard to:
- possible damage to the pump or the pump set that may
have occurred in transit
- ease of running (check that the shaft is free to rotate by
hand)
- the foundation dimensions.
5.3.6 Foundation
Prior to placing the pump set on the foundation which
should be well set, the following preparatory work must
be carried out:
- roughen and clean foundation surface
- remove shuttering/cores from the anchor holes
- clean and blow out the anchor holes
- check the positions and dimensions of the anchor holes
against the arrangement drawing.
Alternatively:
If the baseplate is fastened by means of heavy load plugs:
- Scribe and drill plug holes
- Clean plug holes and blow them out
- Inse rt heavy l oad plugs
14
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