Teral VKA Series User manual

Coolant Pump
Instruction Manual
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Multi-stage Immersion Type VKA Series
䌖䌋䌁㩷㪪㪼㫉㫀㪼㫊
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WARNING
xDo not hold the strainer (wire net) of the pump point at the handling of this product. Doing so may
cause the strainer (wire net) to come off, resulting in injuries or damage.
CAUTION
xThis instruction manual describes important information related to handling the pump. Before using
the pump, be sure to read this instruction manual thoroughly for correct handling.
xBe sure to provide this instruction manual to the operator who will actually install, operate, maintain,
and inspect the pump.
xBe sure to keep this instruction manual in the place where the operator can read it any time.
xThis product is subject to change without prior notice.

Safety Precautions
xPrior to use of the pump (transporting, installation, maintenance, etc.), be sure to read this instruction
manual thoroughly for correct handling. All information related to the pump itself and safe use of it are
described in this instruction manual, and should be clearly be understood before using the pump.
Appropriate handling at the stage from the product arrival to the beginning of the actual operation is
necessary, in addition to the maintenance and inspection after the operation starts, in order to fully
achieve the performance of the Coolant Pump, prevent the accident beforehand, and to continue an
excellent operation for a long term.
xSafety Notices used in this instruction manual are divided into two ranks: "Danger" and "Caution".
WARNING Indicates a potential hazardous situation that, if not avoided, may result in death
or serious injuries.
CAUTION Indicates a potential hazardous situation that, if not avoided, may result in
moderate injuries and/or damage to the equipment.
Notices indicated by [ Caution] may lead to serious consequences in some situations.
All of the following are important. Be sure to observe them:
WARNING
General xTransport, installation, piping, wiring, operation, and maintenance of the pump
must be conducted by skilled personnel who thoroughly understand how to
handle the pump. Failure to do so may result in electric shock, injuries, fire, etc.
xBe sure to turn off the power switch of the pump before conducting any
operation. Failure to do so may result in electric shock or fire.
xDo not use the pump near flammable gas. Doing so may result in injuries or
fire.
Installation
adjustment
xBe sure to ground the grounding wire terminal. Failure to do so may result in
electric shock or fire.
Piping
Wiring
x
Refer to the connection diagram inside the terminal box or this instruction manual
for power cable connection. Incorrect wiring may result in electric shock or fire.
xDo not forcibly bend, pull, or crimp the power cable or wires connected to the
pump. Doing so may result in electric shock or fire.
xBe sure to re-attach the cover of the terminal box correctly after wiring/piping is
completed. Failure to do so may result in electric shock.
Operation xNever access or touch moving parts (including external fan, impeller, etc.)
during operation. You may be caught in any moving parts, resulting in injuries.
xIf power failure occurs during operation, turn the power switch off. Failure to
doing so may cause the pump to start suddenly when power is recovered,
resulting in injuries.

CAUTION
General xBe sure to comply with specifications on the nameplate or in this
instruction manual. Failure to do so may result in electric shock,
injuries, damages to the equipment, etc.
xDo not use this pump if damaged. Doing so may result in electric
shock, injuries, fire, etc.
xDo not insert foreign objects or fingers etc. into openings (e.g. fan
cover, discharge port, suction port, drain hole, etc.) of the pump.
Doing so may result in electric shock, injuries, damage to equipment,
etc.
xWe are not liable for modifications to the pump made by the user.
Transport
Carrying
xBe extremely careful not to drop or overturn the pump when carrying
it. Dropping or overturning the pump may result in injuries.
xBefore lifting the pump, check the exact mass of the pump, referring
to the package box, catalog, nameplate, etc., and ensure that the
lifting conditions satisfy the mass. Failure to do so may cause the
pump to drop or overturn, resulting in injuries or damage.
Unpacking xPlace the package in the correct vertical direction to unpack it.
Failure to do so may result in injuries.
xBe careful of nails in wooden frame packing. Failure to do so may
result in injuries.
xCheck that the correct product has been delivered. Using the
incorrect product may result in injuries, damage, fire, etc.
xDo not hold the strainer when you take out the product. Doing so may
result in injuries or damage.
Installation adjustment xNever place flammable objects near the pump. Doing so may result
in fire.
xDo not place objects around the pump that block ventilation. Doing
so may affect the cooling effect, resulting in burns, fire, etc. due to
excessive heating.
xBefore connecting the pump to equipment, check the rotation
direction. Incorrect rotation direction may result in injuries or
damages.
xDo not touch the impeller of the pump. Do not touch the tightening
belt, strainer, and the screw, etc. by bare hand. Doing so may result in
injuries.
xDo not touch the impellers of the pump. Do not touch the securing
belts and strainer with bare hands. Doing so may result in injuries.
xNever stand on the pump. Doing so may result in injuries.
xInstall the pump in such a direction that the information on the
nameplate is clearly visible. Do not place objects in front of the
nameplate. Do not remove the nameplate.
xUse a star-delta starter (with a magnetic switch on the primary side,
3-contactor type) for star-delta starting. Failure to do so may result in
fire.
xDo not operate the product exceeding the operating frequency 60Hz
when driven with an inverter. Doing so may result in the pump burning
out or fire.
xDo not use a fluid with a higher viscosity than the maximum limit of
viscosity. Doing so may result in the pump burning out or fire.

CAUTION
Piping
Wiring
xConform to the Electric Facility Technical Standard authorized by the
government and the Interior Wiring Code of the electric power
company. Failure to do so may result in the pump burning out or fire.
xDo not touch terminals when measuring insulation resistance. Doing
so may result in electric shock. A protective device is not equipped.
An over-current protective device should be attached to the pump as
required by the Electrical Facility Technical Standard. In order to
prevent fire or damage due to the pump burning out, we recommend
that you consult us and install other protective devices (e.g.
Earth-leakage circuit breaker, etc.).
Operation xIf any problem occurs, stop operation immediately and turn the power
switch off. Failure to do so may result in electric shock, injuries, or
fire.
xDo not touch the pump during operation, as the temperature of it
becomes considerably high. Doing so may result in burns.
xDo not operate the pump while the strainer removed. Doing so may
result in injuries or damage.
xDo not insert foreign objects or fingers etc. into the openings of the
pump. Doing so may result in electric shock, injuries, or fire.
xDo not operate the pump without fluid for 30 seconds or longer. This
pump uses a mechanical seal and doing so may result in damage or
fire.
Maintenance xDo not touch terminals when measuring insulation resistance. Doing
so may result in electric shock.
xDuring operation, do not touch the frame of the pump, as the
temperature of the frame becomes considerably high. Doing so may
result in burns.
xDo not touch the screw when you remove the strainer. Doing so may
result in injuries.
xBe careful when using solvent or similar to clean the pump.
Inappropriate use of solvent may result in poisoning.
In addition, the use of thinner and/or benzine may cause a change or
abruption of painting color of the pump.
Repair
Disassembly
Modification
xThe pump must be repaired, disassembled, or modified by skilled
personnel. Failure to do so may result in electric shock, injures, or
fire.
Disposal xDispose of the pump as general industrial waste.

Acceptance checks ---------------------------------------------------------
Please check the following when the coolant pump is delivered.
1) Check the type, output, voltage, frequency, etc. of the delivered pump in reference with the
nameplate to verify that the correct product has been delivered.
2) Check that the coolant pump has not been damaged during transport and that bolts are firmly
tightened. If any problems are found, please consult the dealer where you purchased the coolant
pump.
Specifications ----------------------------------------------------------------
Refer to the nameplate for the coolant pump's head, flow rate, frequency, voltage, current, etc.
Other specifications are described below.
1) Type
2) Fluid The Coolant Pump (standard product) is designed for use with coolant,
including grinding oil and cutting oil. However, since the life of the mechanical
seal might decrease, when the fluid contains large quantities of hard sludge (e.g.
abrasive powder, abrasive grain, diamond grain, etc.), install the filter (e.g.
magnet filter, paper filter, etc.). In addition, the pump cannot be used with fresh
water or special fluid, such as printing fluid, acids. When you want to use other
special fluid (e.g. ceramic etc.), inquire of your dealer or our sales branches.
3) Fluid temperature -20 to 40°C (without freezing)
4) Fluid viscosity Using high viscosity fluids will shorten the life of the motor and may cause the
motor to burn out. Be sure to use the fluids with the viscosity within the limit in
the table below. Note that the viscosity may greatly increase as the fluid
temperature decreases. Check the viscosity when the temperature of the fluid
in use is lowest.
Limit of viscosity [mm2/s]
Type At 50Hz At 60Hz
VKA1䂔䂔AQ, VKA2䂔䂔AQ, VKA3䂔䂔AQ
VKA5䂔䂔AQ, VKA1䂔䂔AH, VKA2䂔䂔AH
VKA3䂔䂔AH, VKA5䂔䂔AH, VKA6䂔䂔AH
VKA8䂔䂔AH, VKA9䂔䂔AH
75 75
VKA4䂔䂔AQ, VKA6䂔䂔AQ, VKA4䂔䂔AH
VKA7䂔䂔AH 75 37.5
Notes
1. The current indicated on the nameplate is when the maximum load is applied
at the limit of viscosity (operated with valve open).
2. The rated head and flow rate indicated on the nameplate is when the viscosity
is 1 mm2/s.
5) Installation location Always use the pump indoors in a location free of flammable gas or vapor and at
an altitude of 1,000 m or less.
6) Ambient temperature-20 to 40°C
Series name (Multi-stage coolant pump)
No. of impeller
No. of casing stage
Q (Flow rate type)
H (Pressure type)
Model
Phase No. of power supply : A (Three-phase)
VKA 4 6 5 A Q
Characteristic type :

Installation --------------------------------------------------------------------
1) Select a well ventilated location with little dust and humidity. Do not install the pump where fluid
splashes onto the motor.
2) Install the pump so that cooling air for the motor can be taken in.
3) Install the pump on a flat surface to prevent any clearance.
4) Select a location where servicing can be performed easily. (Secure sufficient space.)
5) The pump is resistant to externally applied vibration acceleration up to approximately 4.9 to 6.9m/s2.
6) Because the pump section of the VKA type coolant pump is installed in a tank, an mounting hole
larger than the outer diameter of the pump needs to be made. See the outline drawing.
7) Because the suction port is on the bottom of the pump in the pump section of the VKA type coolant
pump, secure at least 5 mm between the bottom of the tank and the suction port. Secure the largest
separation possible to prevent the strainer being clogged with cutting chips and dust.
8) The pump is painted. However, if you want to coat the pump with another color, lightly sandpaper the
pump surface to improve paint sealability.
Piping --------------------------------------------------------------------------
1) Make the piping as short as possible with the minimum number of elbow bends, joints, valves. Use
standard sized pipes. Thin pipes, or those with an excessive number of bends, may reduce the
amount of discharge.
2) Support pipes to prevent the weight of the pipes being loaded directly onto the pump.
3) Do not forcibly screw the pipes into the pump. Doing so may damage the joints.
4) Use seal tape, fluid packing, etc. for threaded sections to prevent fluid and air leaks. Wind the seal
tape correctly so that the port of the pipe is not blocked.
5) Use the largest fluid tank possible.
* The recommended tank capacity is at least three times of discharge amount per minute.
Using a tank with excessively small capacity may cause problems, such as the fluid temperature
increasing, the strainer clogging with cutting chips faster than usual, reduction in the amount of
discharge due to generation of bubbles, etc.
* Put the fluid quietly so that air should not mix when you pour the fluid into the tank.
6) Prevent cutting chips and dust from entering the pump.
* We recommend that you pass the cutting fluid through an overflow section and filter at least three
times. Cutting chips entering the pump may damage the mechanical seal. Be extremely careful.
7)
Take appropriate preventive measures to prevent water hammer (e.g. install an accumulator etc.).
(Reference data)
- Pump discharge port (outlet) size: PS3/4 (for piping)
- Pump mounting bolt: M6 (4 locatios)

Wiring --------------------------------------------------------------------------
1) Wiring must conform to the Electric Facility Technical Standard authorized by the government and
the Interior Wiring Code of the electric power company.
2) For standard voltage products, see the drawing on
the right and connect the motor terminals to the
power supply terminals correctly.
* When the number of terminals is 4 or more, refer to the connection nameplate inside the terminal
box.
3) Ground the wire in case of earth-leakage.
4) We recommended that you use a thermal overload relay to protect the motor from overload and burn
out.
5) You can change the position of the terminal box relative to the discharge port of the pump in
90-degree increments by shifting the motor frame. (excluding the right above the discharge port)
Change the position of the terminal box depending on the installation location.
6) When using connectors, glands, etc., take sufficient precautions to prevent cutting chips, coolant, etc.
from entering the terminal box through the lead-in port. Do not remove the grommet from the lead-in
ports that are not used.
7) Note that the electric current will increase and the motor may be burnt out when the voltage drop is
remarkable. Or else, the thermal overload relay may trip.
Operation ---------------------------------------------------------------------
1. Before starting operation
Because a mechanical seal is used for the shaft seal of the pump section of the VKA type coolant
pump, do not operate the pump without fluid. Doing so may damage the mechanical seal.
Check that the fluid is above the specified level, and confirm that the discharge port is open.
2. When starting operation (When conducting test run)
1) Check that the pump rotates counterclockwise (to the left) when viewed from the top.
2) Check that there are no problems, such as overcurrent, vibration, or noise. If any problem is
identified, see the "Troubleshooting" section for appropriate measures.
3. Operation
1) An involute pump is used for the Coolant Pump, meaning the flow rate can be adjusted by
opening and closing the valve on the discharge side.
Although the motor is not overloaded with the valve fully closed, the temperature of the fluid in
the pump will rise, which may damage the mechanical seal. Do not operate the pump with
the valve fully closed. If unavoidable, provide a bypass route to maintain a minimum flaw rate
(0.1 L/min or more) or stop the motor when not operating the pump. When the temperature of
the fluid rises excessively, the service life of the motor and pump parts may be shortened.
2) Depending on the viscosity of the fluid, air may be taken in if the fluid level is too low, lowering
the amount of discharge or preventing the fluid being pumped. Make the fluid level higher
than "Minimum fluid level". Note that the minimum fluid level differs depending on the
viscosity of the fluid. For safety, keep the fluid level as high as possible.
3) If power failure occurs during operation, turn the power switch off.
U V W
Motor terminals
| | |
U1 V1 W1 Power supply terminals

Maintenance -----------------------------------------------------------------
1. Daily checks
Check for abnormal vibration or sound when starting operation and during operation.
2. Periodic checks
1) Remove dust, oil, etc. on the external surface of the coolant pump.
2) Accumulation of cutting chips in the tank may cause pump failure. Clean the inside of the
tank periodically.
3) Check that the pump's strainer is not clogged with cutting chips. Clean the strainer when it is
clogged with cutting chips.
3. Maintenance of bearing
Using shielded type grease-sealed bearings reduces the bulk of maintenance work including
replenishing grease. Exchange the bearing when an abnormal sound or vibration occurs from the
bearing.
4. Maintenance of mechanical seal
Although the mechanical seal can withstand long-term use in normal operation, operation without
fluid or with a large amount of slurry may damage the mechanical seal. When you find such
problems as fluid leaking from the drain hole or abnormal sound from the mechanical seal,
replace the mechanical seal with a new one.
5. Maintenance of oil seal
Pumps with an external fan have an oil seal to prevent fluid entering in the bearing section.
Replace the oil seal with a new one when replacing the bearing.
* Parts replacement
The service life of parts is determined by the type, atmospheric conditions, and working
conditions. We recommend that you replace parts referring to the table below:
Replacement frequency of consumable parts
Part name Model Replacement frequency
(Note Not guaranteed)
Bearing All Each 1 to 2 years
Oil seal All Each 1 to 2 years
Mechanical seal All Each 1 year
Bearing ring Each 1 to 2 years
Sleeve
For flow rate type of 6 stages
or more casings
For pressure type of 7 stages
or more casin
g
sEach 1 to 2 years
Impeller All When worn out
Rubber parts
(mechanical/oil seal,
etc.)
All Each 2 to 3 years
Gasket All Each time pump is disassembled
Others (screw etc.) All When necessary

Configuration -----------------------------------------------------------------
Parts name Material
1 Fan cover SPCE
2 External fan Resin
3 Oil seal NBR
4AC bearing
(on anti-drive side)
5
Deep grooge
ball bearing
(on drive side)
6 Terminal box Resin
7 Grommet NBR
8 Pump leg FC150
9 Oil seal NBR
10 Oil seal NBR
11
12
Mechanical seal,
Sliding stuff
(fixed/rotatonal),
Bellows,
cup gasket
SiC/SiC
Bayton
13 Washer SUS304
14 Collar SUS304
15 Packing PTFE
16 Casing
(without guide vane) SUS304
17 Casing
(with guide vane) SUS304
18 Imperrer SUS304
19 Bearing ring Ceramic
20 Sleeve Tungste
ncarbide
21 Suction chamber FC200
22 Screw SUS304
23 U-nut SUS304
24 Wide strainer SUS304
25 Strainer Guard SUS304
26 Tight bolt SUS304
27 Seal ring PTFE
Note 1: The bearing ring and the sleeve are used for the product of the flow rate type of 6 stages or more
casings and pressure type of 7 stages or more casings.
Note 2: The seal ring is used only for the pressure type product.
The construction etc. may be modified without any preliminary notice.
Cross sectional view of flow rate type,VKAغغغAQ
Cross sectional view of pressure type, VKAغغغAH

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Parts name Material
1Fan cover SPCE
2External fan Resin
3Oil seal NBR
4AC bearing
(on anti-drive side)
5
Deep groove
ball bearing
(on drive side)
6Terminal box Resin
7Grommet NBR
8Pump leg FC200
9Oil seal NBR
10 Oil seal NBR
11
12
Mechanical seal,
Sliding stuff
(fixed/rotational),
Bellows,
cup gasket
SiC/SiC
Bayton
13 Washer SUS304
14 Collar SUS304
15 Packing PTFE
16 Casing
(without guide vane) SUS304
17 Casing
(with guide vane) SUS304
18 Imperrer SUS304
19 Bearing ring Ceramic
20 Sleeve Tungsten
carbide
21 Suction chamber FC200
22 Screw SUS304
23 U-nut SUS304
24 Wide strainer SUS304
25 Strainer Guard SUS304
26 Tight bolt SUS304
27 Seal ring PTFE
28 Air bleed valve Blass
29 Coupling flange FC150
30 O-ring seal Fluoride
rubber
31 Hexagon socket
head bolt SCM
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Note: The construction etc. may be modified without any preliminary notice.㩷
Cross sectional view of pressure type, VKAƑƑƑAH
[Coupling flange type]

Troubleshooting
xTroubleshooting
If any problem is identified, see "Troubleshooting quick reference" below for appropriate measures.
Troubleshooting quick reference
Failure conditions Cause Solution
Cables are disconnected or
connected incorrectly.
Check cables and
connections.
Fuse is blown or thermal overload
relay is tripped.
Replace fuse or check thermal
overload relay.
No sound
Stator coil is disconnected. Contact authorized dealer for
repairs.
Voltage is too low. Adjust voltage.
Cables are disconnected or
connected incorrectly.
Check cables and
connections.
Fuse is blown or thermal overload
relay is tripped.
Replace fuse or check thermal
overload relay.
Stator coil is disconnected. Contact authorized dealer for
repairs.
Stator contacts rotor due to worn
bearing.
Replace bearing.
Rotation
disabled
Knocking
sound
Foreign matter caught in impeller. Eliminate foreign matter.
Voltage is too high or too low. Adjust voltage.
Voltage is unbalanced. Check circuit.
Stator coil is disconnected,
short-circuited, or grounded.
Contact authorized dealer for
repairs.
Stator contacts rotor due to worn
bearing.
Replace bearing.
Motor
overheats
/overcurrent
Viscosity of fluid is too high. Use fluid with lower viscosity.
Pumping fluid
disabled
Suction port is above fluid level. Adjust fluid level.
Large amount of bubbles in fluid. Prevent bubble
generation/suction.
Rotation direction is incorrect. Connect terminals correctly.
Piping loss is high. Review piping.
Fluid does not run smoothly. Eliminate foreign matter.
Check connections.
Insufficient
discharge
Impellers are worn out. Replace impellers.
Bearing is worn out. Replace bearing.Abnormal
sound
Excessive
vibration
Pump is in single-phase operation. Check circuit.
Rotation
enabled
Water hammer
occurrence
Water hammer occurs when a valve
is closed suddenly.
Install an accumulator.

xScope and period of guarantees
The guarantee period of the pump is one year after shipment to the place indicated in the purchase order.
When failure occurs during the guarantee period, under normal use within the range of the product
specifications according to this instruction manual, damaged parts will be replaced or the pump will be
repaired for free, excluding failure due to any of the following:
(1) Inappropriate handling or operation by the user
(2) Any cause other than the pump
(3) Incorrect repair or modification
(4) Any occasion out of control of the supplier such as natural disaster or casualty
This guarantee applies to delivered pumps only, and does not apply to other equipment damaged due to
failure of the pump. This guarantee is effective in Japan only.
xInvestigation and repair
After the guarantee period elapses, all diagnosis and repair fees are charged. Even during the
guarantee period, we also provide repairs or diagnosis of failures due to causes not included in the free
services listed above at a charge. When you need repairs or replacement parts, contact your dealer or
our sales branches.

䌍䌅䌍䌏

Head Office
230, Moriwake, Miyuki-cho, Fukuyama-city, Hiroshima, 720-0003, Japan
Tel.[phone] Fax.[phone]
www.teral.net
2016 06
TP‑352