Teral SJS User manual

Do not operate，service or inspect this pump untill you have
read and understood this manual．
Keep this manual in a safe place where it can be consulted
at any time．
To：All mechanical Contracter
Make sure to supply copies of this manual to the customer's
operator maintenance and inspection personnel．
VOLUTE PUMP
Models SJS/SJ4S
Instruction Manual

I
Limit of Liability
１．Warranty period is for period of 18 months after date of the bill of lading or 12 months
after installation whichever earlier．
２．During warranty period，equipment sold is warranted to the Buyer to be free from defective
material and workmanship．If Buyer notifies Seller in writing of any claimed defect in the
equipment and if，after appropriate reasonable opportunity to inspect and remedy any defect
by Seller，the equipment is found not be in conformity with this warranty，the Seller will，
at its option and expenses either repair the same or provided a replacement of defective
parts，on condition of F.O.B. Japan．
３．The warranties set forth herein are exclusive and in lieu of all the warranties，express or
implied by law or trade usage．
Seller shall not be liable for any special，indirect，or consequential damages，including
but not limited to loss of use for lost of anticipated profits，arising out of this
contract or a breach thereof．Seller does not warrant any auxialiary equipment．
４．The foregoing warranty does not cover，and the Seller makes no warranty with respect to：
（1）Defect is caused by other equipment which not supplied by Seller or use of improper
parts not specified by Seller．
（2）Failures not reported the Seller within the warranty period above specified．
（3）Force Majeure：
The Seller shall not be liable in any manner for failures，damages，directly or
indirectly owing to any causes or circumstances beyond Seller's control，including
Acts of God，Govermental orders or restriction，war，war like conditions，hostilities，
sanctions，riot，looting，strike，lockout，plague or other epidemics，fire and flood．
（4）Failures or damages due to negligence，accident，abuse，improper operation or
maintenance or abnormal conditions of temperature，moisture，dirt，or corrosion，
and repaired works by others without Seller's consent．
（5）Improper storage before installation．
（6）The cost of dismantling and installation of the equipment．
（7）Dispatching an engineer for repair.

II
Purpose of this Manual
The purpose of this manual is to provide the detailed information that the user needs to
know in order to correctly operate，service and inspect the volute pump．
This manual is intended for persons experienced in the operation of volute pumps，or for
persons who have received instruction from such experienced persons．Wiring and electrical work
must be performed by qualified persons only.
CONTENTS
（ページ）
Limit of Liability ························································ Ⅰ
Purpose of this Manual ····················································· Ⅱ
Contents ··································································· Ⅱ
１．Safety
1.1 Warnings ··························································· １-１
1.2 Safety instructions ··················································· １-１
1.2.1 Safety instructions for operation ······························· １-１
1.2.2 Safety instruction for installation，maintenance and inspection ··· １-２
1.3 Location of warning label ··········································· １-２
２. Structure and overview of the pump
2.1 Names of parts ······················································ ２-１
2.2 Specifications ····················································· ２-２
３. Installation
3.1 Befor using the pump ················································ ３-１
3.2 Instructions for installation ······································· ３-１
3.3 Installation procedure ·············································· ３-２
3.4 Cautions for piping work ············································ ３-４
3.5 Cautions for wiring work ············································ ３-５
４. Preparation for operation
4.1 Checks prior to test operation ······································ ４-１
4.1.1 Electrical system checks ········································ ４-１
4.1.2 Pump system checks ··············································· ４-１
4.2 Test operation ····················································· ４-２
５. Maintenance and inspection
5.1 Cautions for maintenance and inspection ····························· ５-１
5.2 Mechanical seal ····················································· ５-２
5.3 Double mechanical seal ·············································· ５-３
5.4 Gland packing ······················································ ５-３
5.5 Periodic inspection table ··········································· ５-３
６. Troubleshooting ······················································ ６-１

1-1
１．Safety
１.１ Warnings
The Warnings used in this manual are graded into 4 types，according to the degree of
danger（or seriousness of potential accident）that they signify．
DANGER indicates the highest degree of danger，followed by WARNING and CAUTION，
in that order．
There are also NOTES，which draw attention to important information．
Be sure to know the degree of danger signified by the various types of warning，and
follow all the instructions that they give．
Grade Meaning
Imminent danger．Failure to follow the instructions given will
result in death or serious injury．
Potential danger．Failure to follow the instructions given
could result in death or serious injury．
Potential danger．Failure to follow the instructions given could
result in medium or light injury，or in damage to the equipment．
N O T E Draws attention to or stresses important information．
１.２ Safety instructions
１.２.１ Safety instructions for operation
（1）Before turning on the power，always fit the cover over the motor terminal box．
There is danger of electric shock．
(2) Do not water motor. It will cause short-circuit and lower insulation and get damage.
（3）Before operating the pump，inform all the personnel concerned，and make sure that
nobody is in a dangerous place．
（4）While the pump is on operation，touch only those parts of it that you have to touch
in order to operate it．
(5) Do not touch motor as it could be hot.
（6）Operate the controls GENTLY．Do not use force．Operating the controls forcefully
may result in damage，malfunction or breakdown．
（7）The pump should only be operated by persons who have been authorized to do so by
the director of the workplace．
(8) Axis coupling cover must be fitting when pump is running.
（9）Do not run the pump with tools or other objects placed on top of it．
（10）If any of the pump's components are defective or not functioning，DO NOT operate
the pump．
（11）Do not put fingers or objects into the motor's openings．
If you do，you could get an electric shock．
1 - 1

2-1
１.２.２ Safety instructions for installation，maintenance and inspection
（1）Installation，maintenance and inspection of the pump should be performed by
personnel who have been trained in its operation and use．
Electrical wiring work should be performed only by suitably qualified personnel or
electricians．
（2）Backup pump have to be prepared if the occupation is very important and possible cause
heavy trouble when suspension of water supply.
（3）Before carrying out maintenance or inspection of the pump，be sure to inform all
relevant personnel．
（4）Before carrying out maintenance or inspection of the pump, stop the pump and turn
off the main power supply to the operation panel．
If you carry out the work with the power turned on，there is danger of electric
shock，and the pump could start up suddenly，causing injury．
Be sure to install an electrical leakage breaker on the power supply side．
（5）Turn off pump and cut off electric power, call the shop or the pointed server by maker
if something wrong with the pump. Running the abnormal pump will cause electrocute, fire
or trouble.
（6）Do not water motor. It will cause short-circuit and lower insulation and get damage.
（7）After the power is turned on，touch only those parts of the pump that you have to
touch in order to operate it．In particular，do not touch the electrical circuits，
or you could be electrocuted．Be sure to fit the cover over the motor terminal box．
１.３ Location of warning label
The location of the warning label is shown in the drawing below．
If the label becomes dirty or illegible，or starts to peel off，etc.，replace it
with a new one．
1 - 2
Follow ALL instructions in warnings affixed to the pump and written in
this manual．

2-1
２．Structure and overview of the pump
２.１ Names of parts
① Casing
The piping is connected to the casing．
The impeller，which giving pressure to the pumped water by its rotation，is housed
inside the casing．
② Motor
③ Common bed
④ Bearing case
The sealed ball bearing is housed in it．
⑤ Shaft coupling
This coupling connects the pump and motor shafts，transmitting the power．
It absorbs offset between the centers of the two shafts．
⑥ Shaft coupling protective cover
⑦ Shaft seal parts (Mechanical Seal)
This prevents leakage from the clearance through which the shaft penetrates．
There are Special specifications about Gland Packing and double Mechanical Seal.
The pump shown here is a typical model
2 - 1

3-5
２.２ Specifications
The specifications of the standard pumps are shown in the below table． If optional or special
specifications are required，refer to the assembly drawing ,the sectional drawing and other
specification documents.
Specifications
Applicable models Model SJS Model SJ4S
Qualities Fresh water or special medium※１ Pump
Medium Temperature 0～100℃
Installation
location
Indoors(ambient temperature 0～40℃）
－6ｍ －6ｍ（20℃）
50Hz （In case suction
bore size is 100：
-5m）
※ But if pump is used with total
suction head lower than 10m, total
suction head is lower than 60%.
－6ｍ
Total
suction
Head (when
20℃)
60Hz （In case suction
bore size is 100：
-3m）
Impeller Closed
Shaft seal Mechanical seal
Structure
Bearing Sealed ball bearing
Casing SCS13
Shaft SUS304
Material
Impeller SCS13
Type O.D.P. or T.E.F.C Type
Motor
Poles 2P 4P
Power supply 50Hz ： 3 phase，200V
Allowable voitage variation：
±10% Max 60Hz ： 3 phase，200V/220V
Phase imbalance:3％ max.
Suction
Pump flangeDischarge JIS 10K regular type
※1 Fresh water：No foreign substance (solid body), pH6.5～8, chloride ion is lower than 200ppm.
Plenty of corrosive ion or special liquid should discuss with us.
※2 Total suction head shows here means at water temperature 20℃. Discuss with us because it will
become lower if warm water is used.
Do not use the pump in conditions out of its specification ranges．
If the pump is used out of these ranges，electric shock，fire，or breakdown could result．
2 - 2

3-5
３．Installation
３.１ Before using the pump
When receiving pump，check the following：
If any defects，contact agent．
（1）Are all descriptions on name plate as ordered？
（2）Has any damage occurred during transportation？
（3）Have any nuts or bolts（or other parts that should be tight）been loosened？
（4）Have all the accessories that were ordered been delivered？
３.２ Instructions for installation
（1）Install the pump in a place that satisfies the following conditions：
・A place sheltered from wind and rain．
This pump is for indoor use．If it is installed outdoors，the place
must be sheltered from wind and rains．
・A well-ventilated place，with less humidity or dust in the air．
・A place with ambient temperature in the range 0-40℃．
・A place where unauthorized persons cannot enter．（So that unauthorized persons
can not operate the pump．）
・ A place as near as possible to the water source.
・ A place will not cause the secondary damage when water leakage happen.
（2）Fasten the pump securely on a concrete foundation，using anchor bolts．
（3）Be sure to provide drainage ditch around the pump．
（4）If there is danger of freezing in the wintertime，be sure to provide anti freezing
measures for the pump room or for the pumps，its valves and piping．
（5）The doors and walls of the pump room should be made of materials with good sound
insulation effect．
（6）When lifting the pump，rope must tight up with through under common bed．
Before unpacking，make sure that the pump is the right side up．
Especially if packing is wooden crate，beware of nails，
or you could hurt yourself．
Install the pump in a position where the total suction head
（suction height + suction piping resistance）will be within
the standard specification total suction head limits
Do not lift the pump with tightening rope on pump shaft or eye bolt of motor．
Before lifting the pump，check its weight（given in catalog and outer dimension
drawings），and make sure that the weight of the pump does not exceed the rated
load of the ropes and lifting equipment．
3 - 1

3-5
３.３ Installation procedure
（1）Provide a foundation of ample area and depth to bear the weight of the pump and its
operating load．
（2）Provide holes in the foundation in accordance with the drawings，or else using the
pump itself to determine the hole positions prior the pump is installed．
Anchor bolt and anchor bolt hole dimensions
FD FL FB Wa H
M10 200 45 100 250
M12 250 55 120 300
M16 315 70 150 370
M20 400 90 190 450
（3）Make sure that the surface of the concrete foundation is level，and protect it
thoroughly until the pump is installed．
（4）Mount the pump on the foundation．When mounting，insert square steel plates or
metal wedges between the common base and the concrete foundation，to make a gap
through which the mortar can be poured in．（The gap should be 10-30 mm wide.）
As well as being used for adjusting the levelness of the pump，the metal wedges will
receive the pump's weight and operating load．
Use only a few wedges，that are as thick as possible．
Insert the wedges close to the anchor bolts，and locate them so that they provide
even weight．
（5）Fix the anchor bolts to the common base using the nuts，and hang them in center of
bolt holes．
N O T E
3 - 2

3-5
（6）Place level gauge on the surface of the flange，and check that the flange is
perfectly horizontal．If it is not，use the metal wedges to adjust it．
（7）Confirmation of shaft alignment．
The shafts is aligned before shipment．However，if the shafts may become offset
during transport，re-align it at site．
（8）Pour mortar into the anchor bolt holes，the gap under the common base，and the area
around the common base after alignment of shafts is completed．
When the mortar has fully cured，tighten the anchor bolts．
Be sure to align the shafts correctly．
If they are not correctly aligned，damage to the equipment，
vibration or noise could result．
If you remove the shaft coupling cover to align the shafts，
BE SURE to fix it back in place before running the pump．
If the cover is left off when the pump is run，body parts could get caught up
by the rotating parts，resulting in serious injury．
3 - 3

3-5
３.４ Cautions for piping work
（1）Make the suction piping as short as possible，with as less bends as possible．
（2）Provide pipe supports for the piping，so that the weight of the piping is not
imposed on the pump.
（3）To prevent accumulation of air in the suction piping，make the piping slope gently
upwards towards the pump（at a gradient of 1/100 or more）．
（4）The suction piping should be of the larger size as the pump inlet size.
（5）Provide a sluice valve and a check valve in the discharge piping．If there is danger of
water hammer occurring，use a shock-absorbent type check valve．
（6）If the pump is used for positive suction pressure，a sluice valve must be fitted in
the suction piping．
（7）If the pump is used for negative suction pressure，do not install a sluice valve in
the suction piping．
（8）If the pump is used for negative suction pressure，install a foot valve equipped
with a strainer on the end of the suction piping，to prevent intake of foreign
matter．
（9）Install joints of suction piping very carefully，so that no air gets inside them．
(10) Do not join the suction pipes together when pumps used for negative suction pressure.
（11）After connecting up the piping，be sure to clean the interior of the reservoir tank，
so that no foreign matter will be sucked into the pump from the tank．
The weight of the piping must not be imposed on the pump．If it is，the alignment
will become offset，resulting in damage to the equipment，vibration or noise．
Size of suction pipe 80mm・100mm・125mm should use
a size bigger. Small size pipe may cause
cavitation.
ポンプ吸込口径 吸込配管口径
８０ mm １００ mm
１００ mm １２５ mm
１２５ mm １５０ mm
3 - 4

3-5
(12) Cautions for double Mechanical seal.
•Prepare another pump for flushing liquid circulation, as flushing from the outside
is needed for a sealing surface by double mechanical seal specification.
•Refer to materials list for the structure of a double mechanical seal.
•Refer to a pump assembly drawing since the specification of flushing changes with
pump form.
•As showed below, piping of flushing is connected to the flange part of double
mechanical seal. Do not mistake an inflow mouth (FI) and an outlet head (FO).
•Use possible material in considering the maintenance of pipes.
•Set up the gate valves and the flow controlling valve for maintenance in flushing
pipes.
•Pressure, flow, muddiness of liquid circulation should can be checked suitably by
the system of flushing.
•Not suitable flushing will cause poor lubrication of the sealing surface damage
or flushing liquid muddiness.
Flow 3L/min
Liquid Clean filtrate
Temperature Normal temperature
Pressure Gland pressure+0.15～0.2Mpa
※Refer to assembly drawing.
Fig. Flushing specification
Flushing pipe sample
（ＦＯ）
（ＦＩ ）
短管１ ／４
Ｂ
流量調節弁
短管１ ／４
ダブルメ カニカルシール
Ｂ
仕切弁
１２５Ｌ以上
フラッシングＩ Ｎ
７５Ｌ以上
圧力計
フラッシングＯＵＴ
3 - 5
Double mechanical seal
Short pile1/4B over 125L
flow controlling valve
flushing out
flushing in
Gate valve manomemt
Short pile1/4B over
75L

3-5
３.５ Instructions for wiring work
（1）Provide an electrical leakage breaker and overload protection device for the pump's
main power supply cable.
（2）Be sure to install a ground cable，to prevent electric shock.
Connect the ground cable to the ground terminal inside the motor terminal box.
（3）Install the main power supply cable through a conduit pipe or metal duct and shield
it，and ground the outer surface of the pipe/duct．
（4）Fluctuation in the power supply voltage should not exceed ±10% of the rated
voltage，and frequency should not exceed +3～－5％.In this range pump can run. But do not
drive the pump in a long period with power supply over ±5%, frequency over ±2%.
Even within the allowable range, the data of pump property, motor property, rise of motor
temperature may be different with the power supply voltage and frequency.
(5) Notes in inverter driving
・ Set the operation current lower than 90% of the rating electric current.
・ The lowest currency should be 20Hz.
・ Do not drive inverter if motor is equipped with self-protector.
・ Contract with us if 400V. Measurement is necessary for inverter serge.
・ Magnetic sound from motor may occur jarring compared with a commercial power drive when
drive by inverter. This magnetic sound can be adjusted by changing career cycle with
an inverter. This sound has no bad influence on electric motor quality. Inverter
allowable output may become lower by changing career cycle. Keep it in mind when select
inverter.
Use good quality wiring equipment for wiring．
Wire the pump safely，in comply with the local requlations or codes．
The pump must be wired by a qualified electrician or other suitably
qualified person．
It is illegal，and very dangerous，for unqualified people to perform
wiring work.
Connecting the ground cable to gas or water pipes is illegal，and
extremely dangerous.
Conclude the power supply wire connecting terminal surely. Slackness of terminal
can cause lack aspect driving and induce electric motor damage.
3 - 6

3-5
４．Preparation for operation
４.１ Checks prior to test operation
４.１.１ Electrical system checks
（1）Check that the wiring has been connected correctly．
（2）Check that terminal connections have been secured．
（3）Check that grounding has been carried out properly．
（4）Check that the setting of the overload protection device is the motor's rated
current．
４.１.２ Pump system checks
（1）Turn the shaft by hand，and check that it turns smoothly．
If it is not turned smoothly，it means there are rust or foreign object inside the pump,
etc.,so inspect the pump.
（2）Fully open a sluice valve on suction piping.
（3）Take out the priming plug，and supply priming water until the pump is full and
water floods out of it．
Turn the pump by hand to make sure that all the air has been expelled from inside
it．
ALWAYS turn off the main power supply before turning the pump by hand．
Do not run the pump without supplying prime water.
It may cause of damages the parts of the pump.
4 - 1

3-5
4.2 Test operation
（1）Turn the power switch on and off a couple times，and check that the pump
rotates in the correct direction．
The correct direction is clockwise，viewed from the motor end of the pump．
If the pump rotates in the reverse direction，change round 2 of the main power
cable's 3 wires．
（2）Turn on the power switch，and run the pump．
・Fix a coupling cover back befare operating the
pump．Hands could get caught up in the coupling．
・Be sure to fix terminal box cover of motor．
There is danger of electric shock．
Do not run the pump in the reverse direction，
or it could break down．
Do not run the pump at closed valve operation for
longer than 5 minutes．If do，the water inside the pump
will heat up，resulting in accident or trouble.
Before operate a pump, flushing the inside of pipe. Any foreign substance in
pump may cause damage on shaft seal or rotation slide part.
Re-start a pump after it stopped totally. Turn the electric power during pump
is running may cause over torque and damage pump.
4 - 2

3-5
（3）Gradually open the sluice valve on the discharge side，until the specified discharge pressure
is reached．
（4）Check for abnormal pressure，current，noise or vibration．
（5）Close the discharge sluice valve，and stop the pump．
High stop-start frequency is the reason for early damage of
a pump. Lessen the times of stop-start frequency as much as
possible.
5 times per hour at MAX.
Keep the cocks of the pressure gauge，compound gauge
and other instruments closed at all times，except when they
are being used for checking．
If these cocks are left open，breakdown is likely to occur．
4 - 3
Speed (min-1)
Standard data in bearing part
Total suction head (1/100mm)

3-5
5．Maintenance and inspection
５.１ Cautions for maintenance and inspection
（1）When carrying out daily inspection，carefully observe the following instructions．
① If pump discharge pressure，current，noise or vibration are markedly different
from normal，it is a sign of trouble．In such a case，refer to ”5.4 Periodic
Inspection Table”and take prompt corrective action．
For this purpose，it is recommended to keep a log book．
② If bearing temperature rises to an abnormally high，stop the pump and inspect the bearing．
The maximum allowable temperature difference between the bearings and room temperature
is 40℃.
③ Mechanical seal may cause a high-frequency sound irregularly by using as a shaft seal,
but no problem with pump quality.
④ In case the pump is equipped with a mechanical seal，there should be practically no
dripping（leakage）of water from the seal．If the mechanical seal does leak
significantly，replace it．
⑤ Make sure there is no abnormally high temperature when a gland packing is used as shaft
seal. Too little leakage rate may cause abnormally high temperature.
⑥ Keep the cocks of the pressure gauges and compound gauge closed at all times，
except when they are used during inspection．
⑦ When power failure，turn off the power supply without fail．Otherwise the
pump could suddenly start up when the power supply is resumed，which will be
dangerous．
Before inspecting the pump，always turn off its main power
supply．
Otherwise the pump could suddenly start up in auto operation，
exposing personnel to great danger.
Do not run the pump at closed valve operation for
longer than 5 minutes．If do，the water inside the
pump will heat up，resulting in accident or trouble.
5 - 1

3-5
（2）If the pump is out of use for prolonged periods，observe the following instructions：
① In the wintertime，there is danger that the pump interior may freeze，so be sure
to drain all the water from the pump，or else provide thermal insulation．
② If there is a stand by pump，run it from time to time to keep it in good operating condition．
③ Gland packing used as shaft seal may be rusted if pump is not operated for a long period.
Insert a new shaft seal after greasing as anti-rust processing.
④ Drive the backup pump sometimes and make sure it can be used anytime if necessary.
５.２ Mechanical seal
（1）Mechanical seal is a precision parts for prevention of water leak.
Handle it with care to operate without any trouble.
（2）Mechanical seal is a consumable part. Its life depends on the quality of liquid, having
foreign objects or no, pressure, etc.
（3）If water leaks, request exchange it.
In the beginning of driving a pump, mechanical seal may leak a little sometimes because
the shortage of familiarity of mechanical seal slide surface. This leak is not abnormalities
of a mechanical seal. Use the pump free from care.
５．３ About double mechanical seal
(1) Do not drive double mechanical seal when it is dry. It may cause damage on seal and lead
to leak.
(2) Flushing liquid must be circulated previously. Do not stop flushing when pump is driving
as it may cause atmosphere side sealing surface in dry operation.
(3) When flushing liquid is circulating, a pump will not in dry driving. But do not empty
operation for a long period.
(4) The liquid leak under operation is very dangerous. Do not close your face or hand.
(5) The operation mistake of a valve may damage seal equipment and cause sealing liquid disperses
in the atmosphere side. Please ensure valve operation of the piping lines.
(6) Double mechanical seals are precise parts. Do not give big load or shock when handling.
(7) Keep oil, grease, etc. away from a double mechanical seal.
(8) Inspect the flushing liquid and exchange the seal if the reduction in flow or muddiness
of liquid is observed.
(9) Double mechanical seals are consumables. Periodical exchange is recommended even if
abnormalities do not occur.
5 - 2

3-5
５．４ About gland packing
（１） Adjust the leakage of gland packing as below.
Avoid to adjust it in the beginning of driving a pump. But loosen the nut of packing
if gland packing housing is unusual heat, or be to few amount of leakage.
After driving a pump for 30 minutes, if the leakage amount is too much, fasten the
packing nut slowly as watching the generation of hear. Do not uneven tightening the
packing nut.
Pump suction size Standard of the amount of leakage
from gland packing
65mm Max 10～20 [cc/min]
80mm or more 15～30 [cc/min]
※ In different condition, the amount of leakage may become less or more than the
standard showed above.
（２） Leakage quantity becomes more and more. Re-tightening the packing if the leakage is
twice of the list showed above.
（３） Exchange a new one if it won’t be fasten anymore after retorquing.
（４） Make sure gland packing has been inserted deeply one by one. Do not overlap the gland
packing cut end in the same position. Change the cut end every 90°～120°when insert
gland packing.
（５） Gland packing is consumables. According to the quality of circulating water, the
existence of a foreign substance, pressure, etc., the useable period is changeable.
5 - 3
Uneven tightening or over fasten the gland packing may cause unusual heat
at shaft seal. Be careful as it may damage the shaft and gland packing.
グランドパッキン
スタッドボルト
軸封部
パッキン押さえ
ナット
主軸
Gland packing
Stud bolt
Nut
Shaft
Shaft seal
Packing gland

3-5
５.５ Periodic inspection table
Inspection
interval Consumable items
Item
Part for inspect-
ion/adjustment What to inspect Method Criterion
Daily 1 month 6 months 1 year Item Quantity When to replace
Temperature Measure 0 - 40℃ ○
Humidity Measure
Max．relative humidity 85%
○
Ambient conditions
Dust，etc．
Condition
within spec．
ranges Observe
visually Should be no dust ○
Voltage Measure
Should be rated voltage
○
Voltage
variation Measure
Should be within allowa-
ble variation range
○
Power
Power supply
board
terminal
Loose screws Tighten Should be no looseness ○
Clogging Should be no clogging ○
Impellers
Wear
Disassemble
and inspect
Should be normal ○
Shaft
& surroundings Smooth rotation
Rotate by hand
Should rotate easily ○
Bearings Overheating
Feel by hand
Heat should be normal ○ Bearings 2 Every 3 years
Mechanical seal Drip Visually No leakage ○
Mechanical
seal 1 1 year
Appearance
Abnormal noise & vibration
Listen Should be none ○
Pump & motor
Insulation
resistance
Between ground and
each lead wire Megger
Should be at least 1 MΩ
○
Replacement or repair of parts should be performed by personnel from a
specialist company or by a service agent approved by the manufacturer．
Incorrect replacement or repair can cause beakdown or malfunction.
5 - 4