SMC Corporation VT307 Series User manual

Doc. No.VT307∗∗-OMH0001-C
3 Port Direct Operated Solenoid Valve
PRODUCT N ME
VT307 Series
MODEL/ Series

VT307∗∗-OMH0001-C
Contents
Safety Instructions ------------------------------------------------------------------------------- 2,3
Precautions on Design / Selection ----------------------------------------------------------- 4,5
Mounting -------------------------------------------------------------------------------------------- 5
Piping ------------------------------------------------------------------------------------------------ 5
Wiring ------------------------------------------------------------------------------------------------ 5
Lubrication ------------------------------------------------------------------------------------------ 5
ir Supply ------------------------------------------------------------------------------------------- 6
Operating Environment -------------------------------------------------------------------------- 6
Maintenance ---------------------------------------------------------------------------------------- 6
Specific Product Precautions ------------------------------------------------------------------- 7,8
Troubleshooting ------------------------------------------------------------------------------------ 9
Remedy ---------------------------------------------------------------------------------------------- 10
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VT307∗∗-OMH0001-C
Safety Instructions
These safety instructions are intended to prevent hazardous situations and/or e uipment damage.
These instructions indicate the level of potential hazard with the labels of “Caution,” “Warning” or “Danger.”
They are all important notes for safety and must be followed in addition to International Standards
(ISO/IEC)*1) , and other safety regulations.
*1) ISO 4414: Pneumatic fluid power -- General rules relating to systems
ISO 4413: Hydraulic fluid power -- General rules relating to systems
IEC 60204-1: Safety of machinery -- Electrical e uipment of machines (Part 1: General re uirements)
ISO 10218-1992: Manipulating industrial robots -Safety.
etc.
Caution
Caution indicates a hazard with a low level of risk which, if not avoided, could result
in minor or moderate injury.
Warning
Warning indicates a hazard with a medium level of risk which, if not avoided, could
result in death or serious injury.
Danger
Danger indicates a hazard with a high level of risk which, if not avoided, will result
in death or serious injury.
Warning
1. The compatibility of the product is the responsibility of the person who designs the equipment or
decides its specifications.
Since the product specified here is used under various operating conditions, its compatibility with specific
e uipment must be decided by the person who designs the e uipment or decides its specifications based on
necessary analysis and test results.
The expected performance and safety assurance of the e uipment will be the responsibility of the person who
has determined its compatibility with the product.
This person should also continuously review all specifications of the product referring to its latest catalog
information, with a view to giving due consideration to any possibility of e uipment failure when configuring the
e uipment.
2. nly personnel with appropriate training should operate machinery and equipment.
The product specified here may become unsafe if handled incorrectly.
The assembly, operation and maintenance of machines or e uipment including our products must be
performed by an operator who is appropriately trained and experienced.
3. Do not service or attempt to remove product and machinery/equipment until safety is confirmed.
1.The inspection and maintenance of machinery/e uipment should only be performed after measures to
prevent falling or runaway of the driven objects have been confirmed.
2.When the product is to be removed, confirm that the safety measures as mentioned above are implemented
and the power from any appropriate source is cut, and read and understand the specific product precautions
of all relevant products carefully.
3. Before machinery/e uipment is restarted, take measures to prevent unexpected operation and malfunction.
4. Contact SMC beforehand and take special consideration of safety measures if the product is to
be used in any of the following conditions.
1. Conditions and environments outside of the given specifications, or use outdoors or in a place exposed to
direct sunlight.
2. Installation on e uipment in conjunction with atomic energy, railways, air navigation, space, shipping,
vehicles, military, medical treatment, combustion and recreation, or e uipment in contact with food and
beverages, emergency stop circuits, clutch and brake circuits in press applications, safety e uipment or
other applications unsuitable for the standard specifications described in the product catalog.
3. An application which could have negative effects on people, property, or animals re uiring special safety
analysis.
4.Use in an interlock circuit, which re uires the provision of double interlock for possible failure by using a
mechanical protective function, and periodical checks to confirm proper operation.

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VT307∗∗-OMH0001-C
Safety Instructions
Caution
1.The product is provided for use in manufacturing industries.
The product herein described is basically provided for peaceful use in manufacturing industries.
If considering using the product in other industries, consult SMC beforehand and exchange specifications
or a contract if necessary.
If anything is unclear, contact your nearest sales branch.
Limited warranty and Disclaimer/Compliance Requirements
The product used is subject to the following “Limited warranty and Disclaimer” and “Compliance
Re uirements”.
Read and accept them before using the product.
Limited warranty and Disclaimer
1.The warranty period of the product is 1 year in service or 1.5 years after the product
isdelivered.∗
∗∗
∗2)
Also, the product may have specified durability, running distance or replacement parts. Please
consult your nearest sales branch.
2. For any failure or damage reported within the warranty period which is clearly our responsibility,
a replacement product or necessary parts will be provided.
This limited warranty applies only to our product independently, and not to any other damage
incurred due to the failure of the product.
3. Prior to using SMC products, please read and understand the warranty terms and disclaimers
noted in the specified catalog for the particular products.
∗
∗∗
∗2) Vacuum pads are excluded from this 1 year warranty.
A vacuum pad is a consumable part, so it is warranted for a year after it is delivered.
Also, even within the warranty period, the wear of a product due to the use of the vacuum
pad or failure due to the deterioration of rubber material are not covered by the limited
warranty.
Compliance Requirements
1. The use of SMC products with production equipment for the manufacture of weapons of mass
destruction(WMD) or any other weapon is strictly prohibited.
2. The exports of SMC products or technology from one country to another are govemed by the
relevant security laws and regulation of the countries involved in the transaction. Prior to the
shipment of a SMC product to another country, assure that all local rules goveming that export
are known and followed.
ollowed.ollowed.
ollowed.

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VT307∗∗-OMH0001-C
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Caution
Design / Selection
1. Confirm the specifications.
Products represented in this manual are designed only for use
in compressed air systems including vacuum).
Do not operate at pressures or temperatures, etc., beyond the
range of specifications, as this can cause damage or
malfunction. Refer to the specifications.)
Please contact SMC when using a fluid other than compressed
air including vacuum).
We do not guarantee against any damage if the product is
used outside of the specification range.
2. Actuator drive
When an actuator, such as a cylinder, is to be driven using a
valve, take appropriate measures cover installation or
approach prohibition) to prevent potential danger caused by
actuator operation.
3. Effect of bac pressure when using a manifold
Use caution when valves are used on a manifold, because an
actuator may malfunction due to back-pressure.
For single acting sylinder, take appropriate measures to
prevent malfunction by using it with an individual exhaust
manifold.
4. Holding pressure (including vacuum)
Since the valves are subject to air leakage, they cannot be
used for applications such as holding pressure including
vacuum) in a pressure vessel.
5. Not suitable for use as an emergency shutoff valve,
etc.
The valves listed in this manual are not designed for safety
applications such as an emergency shutoff valve. If the valves
are used for the mentioned applications, additional safety
measures should be adopted.
6. Release of residual pressure
For maintenance purposes install a system for releasing
residual pressure.
7.
. .
. Operation in a vacuum condition
When a valve is used for switching a vacuum, take measures
to install a suction filter or similar to prevent external dust or
other foreign matter from entering inside the valve. In addition,
at the time of vacuum adsorption, be sure to vacuum at all
times. Failure to do so may result in foreign matter sticking to
the adsorption pad, or air leakage causing the workpiece to
drop.
8. Regarding a vacuum switch valve and a vacuum
release valve
If a non-vacuum valve is installed in the middle of piping
system having a vacuum, the vacuum condition will not be
maintained. Use a valve designed for use under vacuum
condition.
9. Ventilation
Provide ventilation when using a valve in a confined area, such
as in a closed control panel. For example, install a ventilation
opening, etc. in order to prevent pressure from increasing
inside of the confined area.
10. Extended periods of continuous energization
･If a valve will be continuously energized for an extended
period of time, the temperature of the valve will increase due to
the heat generated by the coil. This will likely adversely affect
the performance of the solenoid valve and any nearby
peripheral equipment. Therefore, when it is continuously
energized or the energized period per day is longer than the
de-energized period use low power consumption specification,
or continuous energization type..
Also, please contact SMC because depending on the
application, there may be additional valves not mentioned
above that may be used especially in DC specification).
In addition, it is possible to shorten the energized time by
making a valve with an N.O. normally open) specification.
･If valves are mounted on a control panel, please take
measures to release heat so that the temperature would fall
within the temperature specified for the valve.
Please note in particular that the temperature rise will be large
if three or more adjoining valves are continuously energised on
a manifold at the same time for an extended period of time.
11. Do not disassemble the product or ma e any
modifications, including additional machining.
It may cause human injury and/or an accident.
1. Lea age voltage
Take note that the leakage voltage will increase when a
resistor is used in parallel with switching element or a C-R
circuit surge voltage suppressor) is used for protecting a
switching device because of the passing leakage voltage
through the C-R circuit.
The suppressor residual leakage voltage should be as follows.
DC coil 3% or less of rated voltage
AC coil 15% or less of rated voltage
2. Solenoid valve drive for AC with solid state output
(SSR, TRIAC output, etc.)
1) Current lea age
When using a snubber circuit C-R element) for surge
protection of the output, a very small amount of electrical
current will continue to flow even during the OFF state. This
results in the valve not returning. In the a situation where the
tolerance is exceeded, as in the above case, take measures
to install a bleeder resistor.
2) Minimum allowable load amount(Min. load current)
When the consumption current of a valve is less than the
output’s minimum allowable load volume or the margin is small,
the output may not switch normally. Please contact SMC.
3. Surge voltage suppressor
If a surge protection circuit contains nonstandard diodes, such
as Zener diodes or varistor, a residual voltage that is in
proportion to the protective circuit and the rated voltage will
remain. Therefore, take into consideration the surge voltage
protection of the controller. In the case of diodes, the residual
voltage is approximately 1 V.
VT307 Series
Precautions for 3 Port Solenoid Valve ①
①①
①
Be sure to read before handling.

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VT307∗∗-OMH0001-C
Caution
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Caution
Caution
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Design / Selection
4. Operation in a low temperature condition
It is possible to operate a valve in extreme temperature, as low
as -10
o
C. Take appropriate measures to avoid freezing of
drainage, moisture etc. in low temperature.
5. Mounting orientation
Mounting orientation is free.
Mounting
1. Operation manual
Install the products and operate them only after reading the
operation manual carefully and understanding its contents.
Also, keep the manual where it can be referred to as
necessary.
2. Ensure sufficient space for maintenance activities.
When installing the products, allow access for maintenance.
3. Tighten threads with the proper tightening torque.
When installing the products, follow the listed torque
specifications.
4. If air lea age increases or equipment does not
operate properly, stop operation.
Check mounting conditions when air and power supplies are
connected. Initial function and leakage tests should be
performed after installation.
5. Painting and coating
Warnings or specifications printed or affixed to the product
should not be erased, removed or covered up.
Please consult with SMC before applying paint to resinous
parts, as this may have an adverse effect due to the solvent in
the paint.
Piping
1. Preparation before piping
Before piping is connected, it should be thoroughly blown out
with air flushing) or washed to remove chips, cutting oil and
other debris from inside the pipe.
2. Wrapping of pipe tape
When screwing piping or fittings into ports, ensure that chips
from the pipe threads or sealing material do not enter the
piping. Also, if pipe tape is used, leave 1 thread ridges
exposed at the end of the threads.
3. Connection of fittings
When screwing fittings into valves, tighten as follows.
Tightening Torque for Piping
Connection
thread
Proper tightening Proper
tightening torque (N･
･･
･m )
Rc 1/8 7～9
Rc 1/4 12～14
4. Piping to products
When piping to a product, refer to the instruction manual to
avoid mistakes regarding the supply port, etc.
Wiring
1. Preparation before piping
When connecting power to a solenoid valve with a DC
specification and equipped with a light or surge voltage
suppressor, check for polarity.
If a mistake is mode regarding the polarity, Valve is not
operated .
2. Applied voltage
When electric power is connected to a solenoid valve, be
careful to apply the proper voltage. Improper voltage may
cause malfunction or coil damage.
3. Chec the connections.
Check if the connections are correct after completing all wiring.
Lubrication
Lubrication
1) The valve has been lubricated for life by the factory and does
not require any further.
2) If a lubricant is used in the system, use class 1 turbine oil no
additive), ISO VG32.
Once a lubricant is used in the system, lubrication must be
continued because the original lubricant applied during
manufacturing will be washed away.
If turbine oil is used, refer to the Material Safety Data Sheet
MSDS) of the oil.
VT307 Series
Precautions for 3 Port Solenoid Valve ②
②②
②
Be sure to read before handling.

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VT307∗∗-OMH0001-C
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Caution
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Caution
Air Supply
1. Type of fluids
Please consult with SMC when using the product in
applications other than compressed air.
2. When there is a large amount of drainage.
Compressed air containing a large amount of drainage can
cause malfunction of pneumatic equipment. An air dryer or
water separator should be installed upstream from filters.
3. Drain flushing
If condensation in the drain bowl is not emptied on a regular
basis, the bowl will overflow and allow the condensation to
enter the compressed air lines. It causes malfunction of
pneumatic equipment.
If the drain bowl is difficult to check and remove, installation of
a drain bowl with an auto drain option is recommended.
For compressed air quality, refer to SMC’s Best Pneumatics
catalog.
4. Use clean air.
Do not use compressed air that contains chemicals, synthetic
oils including organic solvents, salt or corrosive gases, etc., as
it can cause damage or malfunction.
1. When extremely dry air is used as the fluid,
degradation of the lubrication properties in side the
equipment may occur, resulting in reduced
reliability (or reduced service life) of the equipment.
Please consult with SMC.
2. Install an air filter.
Install an air filter upstream near the valve. Select an air filter
with a filtration size of 5 ㎛ or smaller.
3. Ta e measures to ensure air quality, such as by
installing an aftercooler, air dryer, or water
separator.
Compressed air that contains a large amount of drainage can
cause malfunction of pneumatic equipment such as valves.
Therefore, take appropriate measures to ensure air quality,
such as by providing an aftercooler, air dryer, or water
separator.
4. If excessive carbon powder is seen, install a mist
separator on the upstream side of the valve.
If excessive carbon dust is generated by the compressor, it
may adhere to the inside of a valve and cause it to
malfunction.
For compressed air quality, refer to SMC’s Best Pneumatics
catalog.
Operating Environment
1.Do not use in an atmosphere having corrosive
gases, chemicals, sea water, water, water steam, or
where there is direct contact with any of these .
2.Do not use in an environment where flammable gas
or explosive gas exists. Usage may cause a fire or
explosion. The products do not have an explosion
proof construction.
3.Do not use in a place subject to heavy vibration
and/or shoc .
4.The valve should not be exposed to prolonged
sunlight. Use a protective cover.
5.Remove any sources of excessive heat.
6.If it is used in an environment where there is
possible contact with a waterdrop, oil, weld spatter,
etc., exercise preventive measures.
7.When the solenoid valve is mounted in a control
panel or its energized for a long time, ma e sure
ambient temperatures is within the specification of
the valve.
Maintenance
1. Perform maintenance inspection according to the
procedures indicated in the operation manual.
If handled improperly, malfunction and damage of machinery
or equipment may occur.
2. Removal of equipment, and supply/exhaust of
compressed air
When components are removed, first confirm that measures
are in place to prevent workpieces from dropping, run-away
equipment, etc. Then, cut off the supply pressure and electric
power, and exhaust all compressed air from the system
using the residual pressure release function.
When the equipment is operated after remounting or
replacement, first confirm that measures are in place to
prevent lurching of actuators, etc. Then, confirm that the
equipment is operating normally.
3. Low frequency operation
Valves should be operated at least once every 30 days to
prevent malfunction. Use caution regarding the air supply.)
4. Manual override operation
When the manual override is operated, connected equipment
will be actuated.
Operate after safety is confirmed.
1. Drain flushing
Remove drainage from the air filters regularly.
2. Lubrication
In the case of rubber seals, once lubrication has been started,
it must be continued.
Use class 1 turbine oil with no additive), ISO VG32 because if
other lubricant oil is used, it may cause malfunction.
VT307 Series
Precautions for 3 Port Solenoid Valve ③
③③
③
Be sure to read before handling.

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VT307∗∗-OMH0001-C
Caution
Caution
How to Use DIN Terminal
1. Disassembly
1) After loosening the thread (1), then if the housing (2) is
ulled in the direction of the thread, the connector will be
removed from the body equi ment (solenoid, etc.).
2) Pull the screw (1) out of the housing (2).
3) On the bottom art of the terminal block (3), there’s a
cut-off art (9). If a small flat head screwdriver is inserted
between the o ening in the bottom, terminal block (3) will
be removed from the housing (2). (Refer to “Figure 1”.)
4) Remove the cable gland (4) and lan washer (5) and
rubber seal (6).
2. Wiring
1) Passing through the cable (7), cable gland (4), lain
washer (5), rubber seal (6) in this order, and then insert
into the housing (2).
2) From the terminal block (3), loosen the screw (11), then
ass the lead wire (10) through, then again tighten the
screw (11).
Note 1) Tighten within the tightening torque of 0.5
N・m±15%.
Note 2) Cable (7) external; φ6 to φ8 mm
Note 3) Crim ed terminal like round-sha e or Y sha e
cannot be used.
3. Assembly
1) Passing cable gland (4), washer (5), rubber seal (6),
housing (2) in this order through cable (7) and connect to
terminal block (3) to the housing (2).
(Push it down until you hear the click sound.)
2) Putting rubber seal (6), lain washer (5), in this order into
the cable introducing slit on the housing (2), then further
tighten the cable gland (4) securely.
3) Insert the gasket (8) between the bottom art of terminal
block (3) and a lug attached to equi ment, and then
screw (1) in from the to of the housing (2) to tighten it.
Note 1) Tighten within the tightening torque of 0.5
N・m±15%.
Note 2) Connector orientation can be changed by 180
degrees de ending on how to assemble the
housing (2) and the terminal block (3).
Connector for DIN Terminal
Descri tion Part no.
DIN connector
B1B09-2A
ight/Surge Voltage Suppressor
AC, 100VDC or more
48 VDC or less
Electrical Connection
Din terminal and terminal (with light/surge voltage su ressor)
are connected inside as in the figure below. Connect to the
corres onding ower su ly.
Terminal no. 1
2
DIN terminal +
-
Terminal +
-
・A licable cable O.D.
Ty e T:φ4.5 to φ7mm
Ty e E:φ2.3 to φ2.8mm
Ty e D:φ6 to φ8 mm
・A licable crim terminal
Ty e E/T:：1.25-3, 1.25-3S
1.25Y-3N, 1.25Y-3S
(Round or “Y” sha ed crim ed terminals can be not used for
ty e “D”.)
ead Wire Color
Voltage Color
100 VAC Blue
200 VAC Red
DC Red (+), Black (-)
Other Gray
VT307 Series
Specific Product Precautions ①
①①
①
Be sure to read before handling.

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VT307∗∗-OMH0001-C
Caution
Caution
Caution
Wa
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Caution
Caution
Continuous On Time
On the standard and low ower consum tion ty es, when the
valve is to be continuously engergized, ensure that it is
o erated for no more than 1,400 hours (equivalent to a rox. 2
months) in a year. Provide at least one o eration every 30
days.
In a lications where the o erating time exceeds 1,400 hours,
select the long-time energizing ty e which has s ecifically been
designed for long time o eration. It should be noted, however,
that even with this ty e, the o eration must be switched over at
least once a month. Consult us for use with s ecial a lication
such as emergency curcuit breaker.
Vacuum Specifications
For vacuum s ecifications, use Model VT307V. In a lications
where the vale is used in a dusty lace, install a filter between
the vacuum cu , where used on the R ort, and the valve. If
should be noted that this valve is not for vacuum retention.
Manifold
1.Each valve is fixed to the manifold vase with two M4
mounting screws. Tighten the screws evenly when
re-mounting.
2.For mounting, tighten M4 or equivalent screws evenly into the
mounting holes of the manifold base.
Tightening torque of he mounting screw(M4):1.4N･m
1.Use caution when valves are used on a manifold, because
an actuator may malfunction due to back- ressure.
Take a ro riate measures to revent malfunction by using it
with an individual exhaust manifold.
2.When mounting a valve on the manifold base, N.C. and N.O.
can be reversed by a function late orientation. Also, since
cylinder also acts reversely, confirm if the function late is
correctly mounted or not.
Changing from N.C. to N.O
This roduct is delivered as N.C. valve.
If N.O. valve is needed, remove mounting screws of the
required valve and turn over the function late. (Make sure that
there are gaskets on both sides of the late.) Then, tighten the
mounting screws to fix the valve to the manifold base.
S ecifications
Function late
N.C. No mark
N.O. NO
Port Direction
For the common exhaust ty e, ressurization or evacuation of
the R ort can cause a malfunction.
N.C.
s ecifications
Function late
N.O.
s ecifications
VT307 Series
Specific Product Precautions ②
②②
②
Be sure to read before handling.

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VT307∗∗-OMH0001-C
TROUBLESHOOTING
⑬
④
Should any trouble be found during operation, tra e the sour e of the trouble in the following order and take orre tive a tion.
Trouble phenomenon Cause expe ted Remedy
⑧
Fun tion plate fault.
Swollen valve seals
W orn spool seal
⑫
Loose s rews
⑤
⑥
Faulty operation Valve is not operated
Dis onne ted oil wire
Ex essive amount of lubri ant
Faulty wiring
Poor onta t at onne tor wire or onne tor
Blown fuse or dis onne ted lead wire
①
②
③
Higher voltage or wrong oil used ⑦
⑭
⑥
Foreign matter aught in armature
④
⑩
④
⑨
⑪
Coil splashed by water
Burnt oil
Intrusion of foreign matter
Spool has not ompletely shifted
A big ontinuous buzzing sound
is emitted when the power is
turned on.
Buzzing
Poor seal on a tuator ( ylinders, et .) side
⑮
Leakage
Air leaks through exhaust port [3(R)
port] of main valve.
∗[1(P) port] in ase of N.O. valve.
Air leaks between valve and
manifold.
Intrusion of foreign matter between gasket and valve
Foreign matter aught in ore
W orn ore
Low line voltage

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VT307∗∗-OMH0001-C
Remedy
Regulate voltage,so that the voltage at the time of the operation be omes spe ifi ations range.
⑭Mat h the fun tion plate orre tly.
⑮Remove the foreign matter.
⑬
④
③
②
①
No. Remedy
⑤
⑥
･When a large quantity of drain is given and annot arry out drain omission surely, install either an
auto-drain or a dryer.The valve should be repla ed.
･If wrong oil is used, ompletely air blow to remove oil, and repla e valve. After valve is repla ed,
use turbine oil lass 1 (ISO VG32).
Regulate pressure so that pilot pressure will fall within operating pressure range during operation.
Redu e the amount of lubri ant to the degree that no oil splashes out of the air exhaust port [3(R) port].
∗[1(P) port] in ase of N.O. valve.
Che k voltage. Repla e valve.
⑨
⑧Prote t the valve so that water does not splash the oil.
In ase of intrusion of foreign matter, to remove foreign matter by air blow of piping and then repla e
valve.
⑩
⑪
In addition, in the ase of trouble, please send it ba k to the supplier for repair or repla ement.
1. Voltage out of rated voltage has been used.
If no improvement is a hieved in spite of the above ountermeasure, inside of the valve may have some
abnomality. In this ase, stop using the valve immediately.
If any of followings are arried out, inside of the valve may have some failure. In this ase, stop using
the valve immediately.
2. Oil other than the spe ified one has been lubri ated.
7. Prohibited way of using the valve whi h is written at "Pre autions" se tion in this operation manual
3. Lubri ation has been stopped intermediately, or lubri ation was suspended temporary.
4. Water splashed dire tely.
5. Strong impa t was given.
6. Alien substan e su h as drain and parti le got into. Drain or garbage invaded a valve.
Repla e part.
Re-wire orre tly.
was arried out ex luding above-mentioned.
Repla e valve.
Repla e part or re-wire positively.
Repair or repla e a tuators.
After stopping air and re-tighten the bolts.
⑫
⑦

VT307∗∗-OMH0001-C
S
Record of changes
□
Renewal My
□
B ll revisions oU
□
C Safety Instructions Po
1st printing: 1986.4
4-14-1, Sotokanda, Chiyoda-ku, Tokyo 101-0021 J P N
Tel: + 81 3 5207 8249 Fax: [phone]
URL http://www.smcworld.com
Note: Specifications are subject to change without prior notice and any obligation on the part of the manufacturer.
© 2008 SMC Corporation ll Rights Reserved