EBARA GS User manual

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EBARA End Suction
Volute Pumps
GS/GSD Model
Instruction Manual
To installation personnel:
Be sure to issue the customer’s pump operation, maintenance, and inspection personnel with copies of
this manual.
CONTENTS
1 Warnings..................................................2
3. Adjustment of gland packing .......................14
2 Safety cautions........................................2
4. Replacement of gland packing .................. 14
3 Delivery checks........................................6
5. Cautions for operation .......................... 15
1. The pump and accessories..........................6
7 Maintenance...............................................15
2. Nameplate...................................................6
1. Daily inspection......................................... 16
3. Lifting and carrying in/out.............................7
2. Prolonged stoppage and storage………... 17
4 Specifications ..........................................7
3. Replaceable parts..................................... 17
5 Installation................................................8
8 Troubleshooting.................................... 19
1. Location.......................................................8
9 Structure................................................22
2. Pipes ...........................................................9
1. External view and residual risks ............... 22
3. Alignment...................................................10
2. Exploded view .......................................... 23
4. Electrical connection..................................11
3. Accessories .............................................. 24
5. Electrical maintenance ..............................12
10 Disassembly and Assembly.................. 25
6 Operation................................................12
1. Disassembly ............................................. 25
1. Preparation for operation...........................12
2. Assembly.................................................. 31
2. Operation・Stopping.................................13
CAUTION
Thank you for choosing the EBARA GS/GSD Model End suction volute Pump. EBARA/Ebara Bombas
América do Sul Ltda.(EBAS) take every caution in manufacturing the product for safe use by the
customer. However, handling this pump in an inappropriate manner may reduce its functional capacity
and result in an accident.
This operation manual explains the proper procedures concerning the installation, operation, and
maintenance of the product. This manual should be read before conducting operation and
maintenance and inspections on this pump.
Installation personnel must provide copies of this manual to the customer’s pump operation,
maintenance and inspection personnel. Keep this manual in a safe place where it can be consulted at
any time.

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1
Warnings
Warnings in this manual provide information needed for safe operation of the pump, and instructions for
preventing danger or injury to you or other people. So that you will know the degree and imminence of
danger that warnings signify, they are divided into two grades, WARNING and CAUTION, according to the
seriousness of what will happen if their instructions are not heeded. Both grades of warning contain
important safety information; carry out all the instructions that they give, without fail.
Warning grade
Meaning
Warning
Potentially hazardous situation. Failure to follow the instructions could result
in death or serious injury.
Caution
Failure to follow the instructions given could result in minor injury or damage
to the pump.
Note
Used to emphasize important information.
2
Safety Cautions
Warning
Turn OFF the power switch when to stop long-term the pump. It
may cause electric shock or electrical leakage and fire.
Turn OFF the power switch before inspecting or repairing the
pump. Not doing so could result in the pump starting up
suddenly in auto operation, exposing personnel to danger.
Do NOT operate the pump for more than 1 minute with the
discharge valve closed. Doing so will increase the inner
pressure of the pump, damaging the casing or plugs.
Install and ground an earth cable. Electric shock could occur
during accidents or electric leakage.
Perform wiring work correctly as specified by electrical facility
technical standards and extension codes. Incorrect wiring could
result in electric shock and fires.
Turn OFF the power switch when a power failure.
Otherwise, the pump may start-up suddenly when the power
supply is resumed, exposing personnel to danger.
Meanings of symbols accompanying WARNINGs and CAUTIONs.
C
Indicates prohibition (that something must NOT be done).
Precisely what must not be done is indicated by pictures or words either inside the
circle of the symbol or close to it.
Indicates an imperative (that something MUST be done).
Precisely what must be done is indicated by pictures or words close to the symbol.

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Install the pump in the locked pump room or equipment room.
When it is placed outside, please arrange the fence and cover to
avoid easy touch by the third person. If the rotating or
high-temperature part is touched, unimaginable injury may
happen.
Please arrange specific short circuit breaker for this pump. It is
suggested to install the wiring breaker with electric leakage alarm
output. Otherwise, it may cause electric shock and fire.
Close the suction and discharge valves, drain the casing drain,
and ensure that the pump pressure is not abnormal or negative
when disassembly and inspections. The pump may undergo
abnormal rotation while the work is incomplete, resulting in
damage to the casing.
Do NOT touch the rotating parts such as the spindle, shaft
couplings, V-pulleys, etc. while the pump is running. Since these
parts rotate at high speed, doing so could result causing injury.
Disassembly and repair of the pump should only be performed by
specialist maintenance technicians. Otherwise, error by personnel
could result in electric shock, fire or operating abnormally and
causing injury.
Do not pour water on the motor. Otherwise, it may cause electric
shock, electric leakage, fire and others.
Please use the anchor bolts to firmly fix the pump. In case of pump
toppling, there will be injury danger. In addition, it may lead to pipe
damage danger due to pump vibration.
Install the coupling guard after the couplings are aligned. In
addition, during pump operation; don’t be close to the rotating
parts to prevent damage.
Please confirm that there are no loose wire connections on the
motor, the primary side and secondary side of control panel, the
electrical equipment in the control panel; and remove the dust. If
bad connection or dust adsorbed on the terminal part due to lose
wire connection, it may lead to heating and danger of fire accident.
Do NOT install the pump and motor near dangerous and
flammable articles. Otherwise, it may cause fire due to ignition.
Warning
Do NOT touch the charge part under turning power switch on.
Otherwise, there is the danger of electric shock.
Do NOT burn plastic components. In case of burning, it may
generate harmful gases.
Do NOT install the pump outdoors or in locations exposed to water
unless the motor is designed for outdoor use. Otherwise, it may
cause electric leakage, electric shock and fire due to deteriorated
insulation or other reasons.
Do NOT install non-genuine parts or modify the pump. Otherwise,
there is a danger of electric shock and fire, as well as malfunction
and breakage of the pump, which may result in bodily injury. Also,
the normal functioning of the pump may be impaired.
NEVER use or work with the pump while it is lifted or suspended
off the floor or ground. Otherwise, it may fall and cause bodily
injury.

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When handling and installing the pump, give consideration to its
mass and shape and be sure to work safely. There is a risk of the
pump falling down and causing bodily injury.
When handling chemicals, consult material safety data sheets
(MSDSs) and other data to study the handling method, protective
equipment to be used, precautions for disposal and so on, wear
appropriate protective equipment and carry out work in a safe
manner while observing other precaution instructions. Otherwise,
there is a risk of burns, fire, and environmental impact.
The handling and installation of the pump must be performed by
technical experts and in accordance with applicable laws and
regulations (for example, Electrical Equipment Technical
Standards, Interior Wiring Code and Building Standards Act).
Otherwise, there is a risk of violation of laws and regulations, as
well as a danger of an accident involving fire, bodily injury and
other damage.
Install the pump in a well-ventilated place free of dust, corrosive or
explosive gas, salt, moisture, vapor and condensation, away from
rain, wind and direct sunlight, in consideration of the machine's
service life. In an adverse environment, deteriorated insulation in
the electric motor drive or control panel may lead to electric
leakage, electric shock and fire.
When the pump is out of use for prolonged periods such as the
wintertime, water inside the pump could freeze, causing damage to
it. Accordingly, in such situations, either drain all water from the
pump or provide thermal insulation to prevent the water from
freezing.
Warning
Do NOT use, to the extent that was out of specificaiton, such as
handling liquid, the installation location and power supply. Causing
the pump failure or injury or electric shock or electrical leakage and
fire.
Caution
To prevent an accident if the pump stops running or an
abnormality occurs, immediately turn off the power switch.
Contact the shop from where you ordered the pump, or EBAS to
perform an inspection and maintenance on the pump.
Do NOT operate the pump with 50Hz specifications at 60Hz.
Doing so will overload the pump, causing the motor to burn.
Make sure that any one of three terminals of the three-phase
motor is not loose or disconnected. Running the motor with only
two terminals connected could a phase interruption, burning out
the motor.
Do NOT touch the motor. The motor’s surfaces will be hot, and
you could get burned if you touch them.
Do NOT cover the motor with a blanket or cloth. Doing so could
over heat the motor, setting a fire.

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Make sure that the floor surface where the pump is installed has
been waterproofed and treated for waste water. If it has not,
severe damage could be caused should leakage occur.
In facilities with living matter (fish farms, fish preserves,
aquariums, etc.), always prepare a spare pump, as oxygen
deprivation may result deaths due to pump failure.
Please be sure to prepare the spare pump when you use this
pump for important equipment (computer cooling equipment,
freezer cooling equipment, etc.) Otherwise, the water supply may
be cut off by failure of a pump, and the equipment may stop.
Please prepare the spare pump to prevent currently used stop.
Otherwise, the water supply may be cut off and equipment may
stop.
Since the coolant, rubber mold release and foreign objects may
be mixed in the medium during production, please arrange proper
filter at the outlet side according to different devices and
proposes, and conduct adequate cleaning, and use the product
after confirming no foreign objects.
Please regularly confirm the action of protective relay. In case of
an accident, it cannot act normally, and there may be electric
shock and fault.
If the pump is to be out of use for a long time, please implement
the test run according to the “Installation” and “Operation” item.
Otherwise, It may cause unsmooth pump operation, motor
burning or idle operation.
Avoid the pump operation without priming and permitting air to
enter the handled liquid. Otherwise, the pump, bearing, shaft seal
damage or pumping could not disabled. In addition, it may cause
scald with pump overheating.
Do NOT touch the pump when the handled liquid exceeds 40 ℃.
The pump temperature is high; touching the pump causes scald.
Caution
Do NOT approach the inlet for suction pipe of the pump.
Otherwise, it may cause the injury of hands and feet by pump
operation.
When the water in the pipe is drained off, don’t turn power switch
on. Otherwise, it may scald by operating without priming, pump
damage and overheating.
Operate the pump within the range of specification. If the pump is
used under quantity changes, avoid the operation under less than
the minimum quantity (equivalent to that of pump inlet diameter
[mm]. For example, for 50mm, 50L/min). Otherwise, pump is air
locked, and/or it may cause pump damage due to pressure and
temperature of pump rising.
Upon stopping operation, please drain off the water in the pump
and pipe. Otherwise, it may flow of bacteria due to corrupted
lagging water.
Please regularly replace the consumable parts. If they are used
under aging or wearing, water leakage, sticking, damage or
others, major trouble may happen. Please entrust the distributor,
EBAS to conduct regular repair or replacement of parts and
components.

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The product cannot be used for food processing or food transfer
applications because it may cause development of bacteria and
contamination by foreign matter.
Ensure that all connection screws in electrically conductive parts
are securely fastened. Otherwise, there is a risk of heat
generation, malfunction and burnout.
When chemical waste is generated during the disassembly or
cleaning of the pump, consult material safety data sheets (MSDSs)
to study the method of disposal, and dispose of it in accordance
with laws and local regulations, for example by employing a
contractor specialized in chemical waste disposal.
3
Delivery checks
When your pump is delivered, check the following immediately.
1. The pump and accessories
(1) Check that the pump is as ordered, by referring to the nameplate (Fig.1)
(2) Confirm that no damage has occurred during transportation.
Check all nuts and bolts to confirm that they are not loose.
(3) Confirm that all accessories have been delivered. (Refer to chapter 9 “Structure”)
2. Nameplate
The basic specifications of the pump are listed on the nameplate. Read the data on the nameplate to
check that this pump was the product that you ordered and be aware of the differences between 50
Hz and 60 Hz devices.
Caution
Be aware of the differences between 50 Hz and 60 Hz devices.
・Pumps with 50 Hz specifications will overload when
operated at 60 Hz, causing the motor to burn.
・Pumps with 60 Hz specifications will poorly perform
when operated at 50 Hz.
Fig.1 Data on pump nameplate (Standard English type)
The place of Origin
Capacity [m3/h]
Rotation Speed [RPM]
Output Power [HP]
Manufacture Year
Serial Number
Total Head [m]
Impeller Diameter [mm]
Model Name

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3. Lifting and carrying in/out
To carrying the pump/ pump set (with motor and common base) suspend it from the lifting tackes as
shown below:
Fig.2 Lifting and carrying in/out the pump (dashed line) or pump set (solid line)
4
Specifications
GS/GSD pump is a hydraulic part of device that moves liquid by physical or mechanical action and is of
end suction own bearings. GS pump complies with EN733 dimensions.
Application: Agriculture, Fire-Fighting, Building, Water supply etc.
Check on the nameplate the total head, capacity, the pump speed as well as the nominal voltage and
current of motor. Other specifications are on Table 1.
Table 1 Standard specifications
GS G SD
Tem perature
D ensity
V iscosity
Im peller
ShaftSeal M echanicalSeal/ G land P acking M echanicalSeal
B earing Shield B allB earing (G rease Lubrication) -
C asing
Im peller
Shaft
C asing R ing
ShaftSleeve
O -R ing
Electric M otor
*1 / Engine Electric M otor *1
B are Shaft
C oupling -
C oupling G uard -
P lease referto C atalogu e
-
B ase
Indoor/ O utdoor
B ronze
Stainless Steel
P ole
Liquid
N B R / EP D M (O ption)
C losed
A N SIB 16.1 (O ptionalE N P N 16)
C astIron
C astIron
Stainless Steel
P um p M odel
2 P oles / 4 P oles
0℃ to 80℃
To be discused each tim e
U p to 16B ar (1.6M P a)
Location *2
M ax.O perating P ressure
Structure
W eight
D rive
W ith M otor
A ccessories
Flange Standard
M aterial

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*1 Voltage fluctuation: Within ±10% of rated voltage. Frequency fluctuation: ±5% of rated frequency.
Simultaneous fluctuation of voltage and frequency: Sum of both absolute values shall be 5% or less.
*2 Ambient temperature:0 to 40 ℃ (32 to 104 ℉) 、humidity:85% or less (no condensation), altitude: up
to 1000m. Do not install at the circumstance which has corrosive gas, explosive gas or steam.
Note
Refer to the Standard specifications if you have purchased a standard
model. We also offer pumps with optional features according to customer
demand.
Be careful not to exceed the given specifications in the use of your pump.
5
Installation
1. Location
(1) There should be ample space around the pump and securing a large working space for maintenance
and inspection.
(2) Provide an enclosure around the pump or take some other effective measures to prevent
unauthorized personnel from coming near it.
(3) Install the pump in a location where it is near a water source, suction height (the height from the
suction surface to the centre of the pump) is low, and the length of the suction piping is short.
(4) Suction pipe should be as short as possible (check the suction total head at data sheet). In certain
cases, such as with hot water, suction head must be lower. To minimize suction pipe loss, excessive
use of elbows and valves should be avoided.
(5) Select an airy location with little dust and moisture. Ambient temperature should not exceed 40℃.
(6) Since water leaks can occur from the mechanical seals and gaskets in the pump, take precautions to
prevent water from leaking onto the floor or lower levels.
Note
After installation, have unneeded packaging disposed of by a specialist
disposal company.

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2. Pipes
The installation must be done according to the arrangement shown in the Figure:
Fig.2 Installation view
1. Make sure that the suction and delivery ducts do not transmit any stresses to the pump, by installing
sufficiently strong supports. If this is not done, the pump could become misaligned and even break.
2. Fit any check valves (between the pump and the delivery valve) in the following cases:
- In very long pipes.
- If the head is high.
- If the operation is automatic.
- When you fill a tank under pressure.
- When the operation is in parallel.
3. Mount air relief valves, if required, in those parts of the installation where it is impossible to avoid the
formation of air bubbles. However, they must not be fitted at points where the pressure is less than
atmospheric pressure, since the valve would suck in air rather than expel it.
4. To reduce the effect of a water hammer, mount a check valve with spring.
5. Suction systems:
- The bottom end of the suction pipe must remain submerged and at a depth of at least twice the
diameter of the pipe (2D) and at a distance from the bottom of 1 time to 1 and a half times the diameter
(1~1.5 D).
- Fit a bottom valve with a filter at the beginning of the suction pipe to prevent the entry of any foreign
bodies.
1
Pump
2
Motor
3
Pipe Support
4
Flexible Joint
5
Check valve
6
Gate valve
7
Foot valve
8
Eccentric reduction
2
1
3
4
5
6
7
8
3
1~1.5D
D
≥2D
1~1.5D

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- The suction pipe will be installed with an upward gradient towards the pump (of more than 1%) to
avoid the formation of air bubbles. The pipes and other accessories must be connected in such a way
so as not to create any air intake between the different elements.
- Make sure that the suction pipe is as short and straight as possible and try to avoid any unnecessary
curves or additional length. Do not install any shut-off valve in this section.
6. In systems where suction is operational:
- The installation of a shut-off valve is recommended in the suction pipe to facilitate dismantling and
overhauls.
- Install the suction pipe with an upward gradient towards the pump to avoid the formation of air
bubbles.
3. Alignment
If a simple elastic coupling is used, adjust by placing tapered liners under earth the bed, and center so
that the shaft coupling is within the range indicated in Fig.3.
To center a pump which has been purchased without a driver and which is to be directly driven, insert
liners under the driver, and center so that the shaft coupling is within the range indicated in Fig.3.
The coupling guard must be removed to make centering adjustments. Be sure to replace before
beginning operation.
Fig.3 Misalignment of the couplings
The difference between Gap A and Gap B should be smaller than 0.1 mm.
A square
Less than 0.05mm
A clearance gauge
Gap A
Gap B

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4. Electrical connection
Check that the motor is cooled properly, by leaving the air inlets and outlets unobstructed. Our
recommendation is to install the equipment in a ventilated place away from any heat source.
The condensate drainage outlets must be in the lower part of the motor. The drainage caps can be
removed if this does not jeopardize the protection of the motor.
All electrical connections of the equipment must be carried out by qualified personnel with the power
supply switched off.
- Use power supply cables that are adequately sized to carry the maximum current absorbed by the motor,
in addition to the margin set by local requirements; this will avoid any overheating and/or voltage drops
(voltage drops must be less than 4% during the start-up phase).
- Make sure the cables reach the terminal box with a curve that prevents water from getting in and
running over them.(Fig.4)
- The contact surfaces of the connections must be clean and protected against rust. Do not place any
washers or nuts between the terminals on the motor and those providing access to the mains.
- Check the airtight sealing of the cable gland so as to ensure the degree of protection indicated on the
nameplate.
- Avoid any mechanical stress being transferred to the motor terminals.
- Comply with the current and frequency limits indicated on the nameplate of the motor.
- It is advisable to install a switch in order to prevent any accidents involving electrical discharges, and
also a protection against power surges for motors with the aim of avoiding any damage due to
overheating.
- Terminal voltage in motors bearing may be within ±10 % of the rated voltage, exceeding this range will
be lead to breakdown.
Fig.4 Curve of the Cable
Warning
Perform wiring work correctly as specified by electrical facility
technical standards and extension codes. Incorrect wiring could
result in electric shock and fires.
Install and ground an earth cable. Electric shock could occur
during accidents or electric leakage.
Caution
Make sure that any one of three terminals of the three-phase
motor are not lose or disconnected. Running the motor with only
two terminals connected could a phase interruption, burning out
the motor.
The motor manual must be read and completely understood by
the specialist personnel/ operators responsible prior to
installation and operation of the motor.
Note
The correct direction of rotation is clockwise when looking from the motor
side.

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5. Electrical maintenance
Any work on the motor must be carried out with the appliance switched off and after disconnecting the
mains power supply.
- Check on a regular basis that the requirements regarding installation and electrical connections are
complied with.
- Comply with the lubrication schedule for the bearings and the type of grease (if it is specified on the motor
nameplate). Nevertheless, we recommend that bearings are replaced after three years.
6
Operation
Warning
Do not operate the pump for more than 1 minute with the
discharge valve closed. Doing so will increase the inner
pressure of the pump, damaging the casing or plugs.
Do not touch the rotating parts such as the shaft, etc. while the
pump is running. Since these parts rotate at high speed, doing
so could result in injury.
Caution
If the pumped liquid is hot water, keep your hands off the
pump. The pump’s surfaces will be hot, and you could get
burned if you touch them.
Do not touch the motor. The motor’s surfaces will be hot, and
you could get burned if you touch them.
Do not cover the motor with a blanket or cloth. Doing so could
over heat the motor, setting a fire.
1. Preparation for operation
Note
After piping or Water filling, check the centering of pump again please.
(1) Do pipe flashing before operation. Without pipe flashing, there might be some abnormal wear
occurring on mechanical seal or other rotating parts.
(2) Try to turn the shaft, to check that it rotates easily. If it turns stiffly or irregularly, inspect internal rusts,
etc.
(3) Prime the pump. Operating the pump without priming it will cause damage. Open the suction valve,
discharge valve, and air vent valve, and fill the pump to the discharge nozzle with water from the pipe
line.
(4) When priming, rotate the pump manually to completely remove air from inside the impeller.
(5) Tightening nuts of gland bolts to the extent to which hand-cranked becomes heavy. Make sure that
there is no uneven tightening happening when tightening nuts of gland bolts. Do adjustment of gland
packing according to “Adjustment of gland packing” (P.15).
Note
Do not make the water leakage value of gland packing to 0 mL/min.
(Refer to P.15 - Table 2)

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2. Operation・Stopping
Warning
If there is a power failure, turn the power switch off.
Otherwise, the pump may start-up suddenly when the power
supply is resumed, exposing personnel to danger.
Note
The correct direction of rotation is clockwise when looking from the motor
side.
(1) Close the discharge valve and air vent valve after priming is completed. If a suction valve is equipped,
open it to full turn
(2) Turn the power briefly on and off again a couple of times, and check that operation is normal. Also
check the direction of rotation.
(3) Once the prescribed speed is reached, gradually open the discharge valve to start cycle operation.
(4) Check for abnormal pressure, current, vibration, or noise. Keep the cocks of the pressure gauge and
compound gauge closed, except when taking measurements. These gauges may be damaged if their
cocks are left open.
(5) After closing the gate valve on the discharge side, turn off the power to shut down the motor.
(6) If there is no check valve on the discharge side, when shutting down operation, gradually close the
discharge valve, and then shut down the motor.
(7) Before the pump is started up for the second time and before all subsequent start-ups, conduct the
daily inspection specified in 7 Maintenance.
Note
Run the pump at a discharge capacity that is suitable for the equipment.
(Capacity that is too large or small will cause noise and vibration, and
waste power.)

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3. Adjustment of gland packing・・・For gland packing type
For gland packing specification, make sure the water leakage is moderate according to Table 2. Prevent
over tightening and uneven tightening gland packing from happening. If the water leakage could not be
adjusted, there might be a deterioration occurring at shaft seal parts. Therefore, it is necessary to
exchange gland packing or both gland packing and shaft, and then adjusting the water leakage value.
(1) The tightening of gland packing
(a) Tightening nuts of gland bolts to the extent to which hand-cranked becomes heavy.
(b) Make sure that there is no uneven tightening happening when tightening nuts of gland bolts.
(2) Adjustment of gland packing during operation of pump
(a) During initial operation of pump, the water leakage value is more than normal operation
(Table 2). To take 10 to 30 minutes’ running-in of pump and making sure that you are aware
of the fever, abnormal noise.
(b) During normal operation of pump, do not make the water leakage value to 0 mL/min.
(c) After running-in of pump, adjusting the water leakage value is moderate according to Table
2.
(d) Checking table of the water leakage value（as a standard）.
Table 2 The water leakage value (as a standard）
Inner diameter of
gland packing
(mm)
Initial
operation
（mL/min）
Normal
operation
（mL/min）
33
70
33
43
86
43
53
106
53
60
120
60
70
140
70
80
160
80
You can also check inner diameter of gland packing from Table 5.(For example, inner
diameter of gland packing of model 32-125 is 33 mm: Refer to Table 5.)
(e) When the water leakage value is huge, tightening gland packing to adjust the water leakage
value to normal value. However, if you tighten gland packing in a short time, pump might be
prone to fever. Therefore, you should tighten gland packing gradually at 10 to 30 minute
intervals.
4. Replacement of gland packing・・・For gland packing specification
Do replacement of gland packing under the situations below.
(1) The disassembling of pump happens, such as a periodical inspection
(2) There is no more space for tightening of gland packing.
(3) The water leakage value could not be adjusted.
(4) When a significant damage or dents (0.7mm or more for one side) occurs to the shaft surface, shaft
should be exchanged for new.
(5) Replace gland packing with new packing, shifting joints from 90 to 120 degrees until last joint is on the
bottom.

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5. Cautions for operation
Warning
If the pump is operated for long periods with the discharge
valve closed, the water temperature inside the pump will
rise, causing an accident. Do not operate the pump with
the discharge valve closed for longer than 1 minute.
(1) The frequent starting up and stopping of the pump will cause damages. It is recommended to limit the
starting up of the pump as follows:
Table 3 The value of starting frequency
(2) If there is a power failure, turn the power switch off. Otherwise, the pump may start-up suddenly when
the power supply is resumed.
7
Maintenance
Warning
Disassembly and repair of the pump should only be
performed by specialist maintenance technicians. Otherwise,
error by personnel could result in electric shock, and the pump
catching fire or operating abnormally and causing injury.
Always turn the power switch OFF before inspecting or
repairing the pump. Not doing so could result in the pump
starting up suddenly in auto operation, exposing personnel to
danger.
Caution
If the pumped liquid is hot water, keep your hands off the
pump. The pump’s surfaces will be hot, and you could get
burned if you touch them.
Do not touch the motor. The motor’s surfaces will be hot, and
you could get burned if you touch them.
To prevent an accident if the pump stops running or an
abnormality occurs, immediately turn off the power switch.
Contact the shop from where you ordered the pump, or EBAS
to perform an inspection and maintenance on the pump.
When the pump is out of use for prolonged periods such as
the wintertime, water inside the pump could freeze, causing
damage to the pump. Accordingly, in such situations, either
drain all water from the pump or provide thermal insulation to
prevent the water from freezing.
Motor output
10 HP (7.5 kW) or less
15 HP to 30 HP
(11 kW to 22 kW)
40 HP (30 kW) or more
Number of
starts per hour
6 times or less
4 times or less
3 times or less

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1. Daily inspection
(1) If pressure, current, capacity, vibration, or noisy differ markedly from normal, trouble of some kind is
probably going to occur, and you should take prompt corrective action. Refer to 8
Troubleshooting for diagnosis and corrective action. You are advised to post a Daily Operation
Condition Check Sheet.
(2) For standard specification, allowable operating temperature of bearing is no more than Room
temperature＋40℃, and no more than 80℃.
(3) There should be almost no leakage if the mechanical seal is normal. If there is a large amount of
leakage, replace the mechanical seal.
(4) Normally, there should be almost no leakage for a mechanical seal. However, at the beginning of
operating of pump, a little water leakage from a mechanical seal is recognized. As the pump is
operating for a while, the water leakage would be decremented, otherwise you should stop the pump
and check it. During daily inspection, losing the bolts of the protector. Do not remove the bolt of the
protector. It may cause bolts to be lost.
(5) For gland packing specification, make sure the water leakage value is moderate according to Table 2.
and preventing over tightening and uneven tightening gland packing. If the water leakage value could
not be adjusted, there might be a deterioration occurring at shaft seal parts. Therefore, it is necessary
to exchange gland packing or both gland packing and shaft, and then adjusting the water leakage.
(6) Standard value of vibrations for when the pump is installed correctly, and piping work has been
performed correctly are shown in Fig.5. Wrong piping work can often cause excessive vibrations.
Speed (min-1)
Fig.5 Vibration standard
(7) Make sure that mounting bolts and terminal screws of electrical wiring are fasten firmly.
(8) Measure the insulation resistance of motor once a month. It is okay when the insulation resistance
value is equal to or greater than the 5MΩ. However, when the insulation resistance value drops
suddenly, no matter the insulation resistance value is more than the 5MΩ or not, the repair of motor is
required
Note
Standard performance curves can be obtained from EBAS sales office
or dealers.
Permitted vibration range (1/1000 mm))

- 17 -
2. Prolonged stoppage and storage
(1) If you have installed a spare pump, run it from time to time and keep it ready for operation anytime.
(2) When the pump is out of use for three months or more, the gland packing unit might be rust-eaten.
Please take the old gland packing unit out, remove moisture from the stuffing box, and install new
gland packing unit into the stuffing box. Also, to prevent the finished surfaces of bearing and shaft
and coupling and so on being rust-eaten, doing something like painting the anti-rust oil please.
(3) When the pump is out of use for prolonged periods in the wintertime or in cold climates, the water
inside the pump could freeze, causing damage to the pump. Accordingly, in such situations, provide
thermal insulation to prevent the water from freezing.
(4) When the pump is out of use for three months or more, please shut off the power.
3. Replaceable parts
Replace the parts according to the conditions shown in Table 4.
Table 4 Inspection list
Replaceable part
Replacement condition
Average replacement frequency
Mechanical seal
When there is leakage.
Annually
Gland packing
When no longer able to control
leakage.
Annually
Shield ball bearing
When there is an abnormally loud
sound or grease flow.
Once every 2 to 3 years
O-ring
Whenever disassembling for
inspection.
―
The above average replacement frequency is for normal operating conditions.
(2) The replaceable parts for each model as:
Mechanical seal, Gland packing, Shield ball bearing and O-ring.

- 18 -
Table 5 Model list for replaceable parts
N om inal
D IA .
125 160 200 250 315 400 500
O -R ing
(Q ty:1)
3.53x234.54 3.53x278.99 3.53x355.19 5.33x456.06 5.33x532.26
32-125.1 32-160.1 32-200.1 32-250
32-125 32-160 32-200 40-250
40-125 40-160 40-200 50-250
50-125 50-160 50-200
65-125 65-160 65-200
80-160
100-160 80-200 65-250 40-315
100-200 80-250 50-315
125-200 100-250 65-315
150-200 125-250 80-315
100-315
100-250L 80-315L 80-400
125-250L 100-315L 100-400
150-250 125-315 125-400
150-315 150-400
150-400L 125-500
200-400 150-500
200-500
*M echanicalSealdim ension s d epend on EN 12756 (D IN 24960)
*O -R in g d im ension s d ep en d on A S 568
60
[1/2"]
70
[1/2"]
80
[9/16"]
38
28
33
[5/16"]
43
[3/8"]
53
[3/8"]
6316ZZ
75
65
55
48
6306ZZ
6308ZZ
6310ZZ
6312ZZ
6314ZZ
B earin g
N um b er
(Q ty:2)
M ech an ical
SealN om inal
D IA .m m
G rand
P acking
In nerD IA .M m
[G P T ype]
(Q ty:4)
3.53x183.74
N om inalD IA ./ O -R in g m m

- 19 -
8
Troubleshooting
Although the equipment usually functions according to the user's requirements, in some cases its
operation may not come up to expectations due to problems with the system or the power supply. The
following table may be useful in finding possible solutions in the event of failures or malfunctions:
1. Pump
Fault
Causes
Measures to be taken
The motor will not start
- The control panel is not working
correctly.
- Motor failure.
- Faults in the power supply.
- Friction on rotation shaft.
- Pump clogged.
- Check all conditions.
- Repair the motor.
- Check and repair.
- Rotate it by hand. Reassemble.
- Repair in specialist workshop.
- Remove foreign bodies.
There is no priming
- Foreign bodies in the foot valve.
- Malfunction in the bottom valve.
- Water leakage from the suction pipe.
- Air entering the suction pipe or seal.
- Remove foreign bodies.
- Replace the valve.
- Check the suction pipe.
- Check the suction pipe and
mechanical seal.
The pump has no flow
rate
- The pump does not turn.
- The delivery valve is closed or
half-closed.
- The suction head is too high for the
pump.
- Check that the impeller is free.
- Open the valve.
- Check the project.
Low flow rate
- The direction of rotation is not correct.
- Low rotation speed.
- Low voltage.
- Blocking in the bottom valve or in the
filter.
- Impeller is blocked.
- Pipe clogged.
- Air entering the system.
- Leakage in the delivery pipe.
- Impeller worn.
- Significant head losses in the system.
- Liquid temperature very high. The liquid
is volatile.
- Cavitation.
- Correct the electrical connections.
- Measure the RPM with a
tachometer.
- Check the power supply.
- Remove foreign bodies.
- Check and repair the suction pipe
and shaft seal.
- Check and repair.
- Check the impeller.
- Review the project.
- Review the project.
- Seek expert advice.
Water comes out initially
and then stops abruptly
- The pump has not been primed.
- Air entering the system.
- Air bubbles in the suction pipes.
- The suction head is too high for the
pump.
- Prime the pump correctly.
- Check and repair the suction pipe
and shaft seal.
- Vent the pipes.
- Review the project.

- 20 -
Power surge
- The voltage is low or the imbalance
between the phases is high.
- The head is too low, or the flow rate is
too high
- 50 Hz pump is being used at 60 Hz.
- Foreign bodies inside the pump.
- The mechanical seal was not fitted
correctly.
- Bearings damaged.
- Friction in the rotation areas. The shaft is
bent.
- The direction of rotation is not correct.
- The density and/or viscosity level of the
liquid is high.
- Check the power supply.
- Partially shut off the delivery
valve.
- Check the nameplate details.
- Remove foreign bodies.
- Fit it correctly.
- Replace the bearings.
- Repair in specialist workshop.
- Check and correct the
connection.
- Review the project.
The bearings are
overheating
- Bearings damaged.
- In operation for a long time with the valve
closed or half-closed.
- Replace the bearings.
- Avoid such a situation; Open the
valve or stop the pump.
Excessive operating
vibration and noise.
- Fault in installation.
- Bearings damaged.
- Flow rate too high.
- Flow rate too low.
- Impeller is blocked.
- The direction of rotation is not correct.
- Friction in the rotation areas. The shaft is
bent.
- Cavitation.
- Vibrations in the piping.
- Check installation.
- Replace the bearings.
- Reduce the aperture of the
delivery valve.
- Increase the aperture of the
delivery valve.
- Remove foreign bodies.
- Check and correct the
connection.
- Repair in specialist workshop.
- Seek expert advice.
- Replace the piping or fit an
inverter.
Excessive water leakage
from the shaft seal.
- Defective fitting of the mechanical seal.
- The mechanical seal is damaged.
- Overpressure in delivery.
- The shaft is bent.
- Fit it correctly.
- Replace the mechanical seal.
- Review the project.
- Repair in specialist workshop.