SMC Networks ASBL Series User manual

PRODUCT NAME
Metal Speed Controller
Low Profile Type
MODEL/ Series/ Product Number
ASBL ＊＊＊＊ - ＊＊
Doc. no. DOC1067778

-1-
Contents
1. Safety Instructions 2 ～ 3
2. Specific Product Precautions 4 ～ 9
3. Application 10
4. Specifications 10
5. Malfunctions and Countermeasures 10
6. Construction 11

-2-
Metal Speed Controller Low Profile Type
ASBL Series
. Safety Instructions
.
These safety instructions are intended to prevent hazardous situations and/or equipment 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 and safety requirements for systems and their components
ISO 4413: Hydraulic fluid power - General rules and safety requirements for systems and their components
IEC 60204-1: Safety of machinery - Electrical equipment of machines - Part 1: General requirements
ISO 10218-1: Robots and robotic devices - Safety requirements for industrial robots - Part 1:Robots
etc.
Danger
Danger
indicates a hazard with a high level of risk which, if not avoided, will result
in death or serious injury.
Warning
Warning
indicates a hazard with a medium level of risk which, if not avoided, could
result in death or serious injury.
Caution
Caution
indicates a hazard with a low level of risk which, if not avoided, could result
in minor or moderate 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
equipment must be decided by the person who designs the equipment or decides its specifications based on
necessary analysis and test results. The expected performance and safety assurance of the equipment 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 equipment failure when configuring the equipment.
2. Only 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 equipment 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/equipment 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/equipment is restarted, take measures to prevent unexpected operation and malfunction.
4. Our products cannot be used beyond their specifications. Our products are not developed,
designed, and manufactured to be used under the following conditions or environments. Use
under such conditions or environments is not covered.
1. Conditions and environments outside of the given specifications, or use outdoors or in a place exposed to
direct sunlight.
2. Use for nuclear power, railways, aviation, space equipment, ships, vehicles, military application, equipment
affecting human life, body, and property, fuel equipment, entertainment equipment, emergency shut-off
circuits, press clutches, brake circuits, safety equipment, etc., and use for applications that do not conform
to standard specifications such as catalogs and operation manuals.
3. Use for interlock circuits, except for use with double interlock such as installing a mechanical protection
function in case of failure. Please periodically inspect the product to confirm that the product is operating
properly.

-3-
Metal Speed Controller Low Profile Type
ASBL Series
. Safety Instructions
Caution
We develop, design, and manufacture our products to be used for automatic control equipment, and
provide them for peaceful use in manufacturing business.
Use in non-manufacturing business is not covered.
Products we manufacture and sell cannot be used for the purpose of transactions or certification specified in the
Measurement Act.
The new Measurement Act prohibits use of any unit other than SI units in Japan.
Limited warranty and Disclaimer/Compliance Requirements
The product used is subject to the following “Limited warranty and Disclaimer” and “Compliance Requirements”.
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 is delivered, whichever is
first.
∗
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 governed by the relevant security
laws and regulations of the countries involved in the transaction. Prior to the shipment of a SMC product to
another country, assure that all local rules governing that export are known and followed.

-4-
2. Specific Product Precautions
Warning
(1) Confirm the specifications.
The products are designed to be used in
compressed air systems (including vacuum) only.
Do not operate at pressures, 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 specifications range.
(2) Products mentioned in this catalog are not
designed for use as stop valves with zero air
leakage.
A certain amount of leakage is allowed in the
products specifications. Tightening the needle
forcibly to achieve zero air leakage through main
valve may result in damage of internal parts and
the product may stop functioning properly.
Please do not tighten the needle forcibly.
(3) Do not disassemble the product or make
any modifications, including additional
machining.
Doing so may cause human injury and/or an
accident.
(4) Sonic conductance (C) and critical pressure
ratio (b) values for products are
representative values.
The speed controller’s controlled flow values are
with the needle fully open and free flow with the
needle fully closed.
(5) The flow rate characteristics for each
product are representative values.
The flow rate characteristics are characteristics
of each individual product. Actual values may
differ depending on the piping, circuitry,
pressure conditions, etc. The flow rate may not
be recognized from the fully closed position until
around the first turn. This is due to the product
design and not a malfunction.
Also, depending on product specifications,
there may be variations in the zero needle
rotations position.
(6) Check if PTFE can be used in application.
PTFE powder (Polytetrafluoroethylene resin) is
included in the seal material of the male thread
type piping taper thread. Confirm that the use of
it will not cause any adverse effect on the system.
Please contact SMC if the Safety Data Sheet
(SDS) is required.
Warning
(7) Speed controllers are designed to control
the speed of the actuator.
(8) The surface of brass may turn black
depending on the storage and operating
environment.
Use of brass with electroless nickel plating
is recommended when discoloration of brass
needs to be avoided.
Warning
(1) Operation Manual
Install the products and operate it 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
proper torque.
(4) Confirm that the lock nut is securely
tightened.
Confirm that the lock nut is securely tightened
and the needle is locked after adjusting the
cylinder speed.
When the product is used with a loose lock nut,
the set flow rate may change unknowingly and
the actuator speed may change, which leads to
dangerous situations.
Forcibly tightening the lock nut exceeding the
locked state may result in breakage. Follow the
proper tightening torque when tightening.
(5) Check the degree of rotation of the needle
valve.
As the needle valve has a stopper mechanism
for maximum opening, it is not possible to rotate
beyond the given limit.
Excessive rotation will cause damage to the
product. Please check the specified number of
rotations before using the product.
(6) Do not use tools such as pliers to rotate the
knob.
It can cause idle rotation of the knob or
damage.
Mounting
Design/ Selection
Design/ Selection

-5-
Warning
(7) Verify the air flow direction.
Mounting backward is dangerous, because the
speed adjustment needle will not work and the
actuator may lurch suddenly.
(8) Adjust the speed by opening the needle
slowly from the fully closed state.
Loose needle valves may cause unexpected
sudden actuator lurching.
When a needle valve is turned clockwise, it is
closed and cylinder speed decreases. When a
needle valve is turned counterclockwise, it is
open and cylinder speed increases.
Note that the application of excessive torque
may break the needle valve.
(9) Do not apply excessive force or shock to
the body or fittings with an impact tool.
It can cause damage or air leakage.
(10) For handling One-touch fittings, refer to
the Fittings and Tubing Precautions.
(11) Use R external threads with Rc internal
threads and NPT external threads with NPT
internal threads and G external threads with
G internal threads.
(12) The handle of this product is attached only
by press fitting. Excess torque may break the
product. The table below shows the
maximum allowable torque of the handle.
M5,10-32UNF 0.03
～
0.05
1/8 0.15
～
0.17
1/4 0.21
～
0.23
3/8 0.23
～
0.25
1/2 0.38
～
0.40
Body size
Maximum
allowable torque
N
・
m
(13) To install and remove the product with
hexagonal hole, use an appropriate hex key
and push it into the hexagon hole of the stud.
Do not apply torque at other points as the
product may be damaged.
Rotate End-body manually for positioning after
installation. Refer to the applicable dimension of
the hexagon wrench.
Warning
Metric [mm] Imperial [Inch]
M5, 10-32UNF 2.5 -
R1/8, G1/8 6 -
NPT1/8 - 7/32"
R1/4, G1/4 8 -
NPT1/4 - 5/16"
R3/8, G3/8 10 -
NPT3/8 - 3/8"
R1/2, G1/2 10 -
NPT1/2 - 3/8"
Connection
Thread
Hex Key (Nominal)
(14) After tightening, Body-A and End-body can
be rotated slightly for positioning purposes
with no air supply. However, do not use the
product in an application where it rotates
constantly or a moment load is applied.
Failure to follow these instructions may result in
wear causing metal powder to enter the
operating fluid, air leakage, or damage to the
fitting.
(15) Do not use the product in a way that the
connection tube oscillates or turns.
It may cause damage to the product body or to
the fitting which may pose a risk to the user. If
Body-A and End-body are likely to oscillate or
rotate, use the product with the tube secured.
(16) After installation, the opening of the snap
ring may protrude from End-body.
Adjust the direction of the snap ring so that it
does not protrude. Using the product with the
snap ring opening protruding may cause injury to
the user or product damage.
*Photos of products
Mounting
Snap ring
Body A
Stud
End-body
Mounting
Before adjustment After adjustment

-6-
Caution
(1) For M5, 10-32UNF
① Tightening method
First, tighten it by hand, then give it an
additional 1/6 turn to 1/4 turn with a wrench. A
reference value for the tightening torque is 1 to
1.5 N·m.
Note) Excessive tightening may damage the
thread portion or deform the gasket and
cause air leakage.
If the screw is too shallowly screwed in, it
may come loose or air may leak.
② Chamfered area for female thread
Conforming to ISO 16030 (air pressure fluid
dynamics –connection –ports and stud ends),
the chamfered dimensions shown in the table
below are recommended.
(2) For R, NPT, G thread
① Tightening method
To tighten a screw, tighten it by hand and then
insert an appropriate hexagon wrench to the
hexagonal socket of the stud and turn it.
Refer to the reference values in the table below
for the tightening torque.
1/8 3 to 5
1/4 8 to 12
3/8 15 to 20
1/2 20 to 25
Connection thread
size
Tightening Torque
(N
・
m)
② Chamfered area for female thread
By chamfering as shown in the following table,
machining of threads is easier and effective for
burr prevention.
Rc NPT G Face seal
1/8 10.2 to 10.4 10.5 to 10.7 9.8 to 10.2
1/4 13.6 to 13.8 14.1 to 14.3 13.3 to 13.7
3/8 17.1~17.3 17.4~17.6 16.8~17.2
1/2 21.4~21.6 21.7~21.9 21.0~21.4
Chamfered port size φD
（
Recommended value
）
Connection
Thread size
*G thread (face seal) complies with ISO16030-
2001.
Caution
(3) The proper tightening torques for hexagon
lock nuts are shown in the table below.
For standard installation, turn 15 to 30°using a
tool, after fastening by hand. Pay attention not to
over tighten the product. Check the dimensions
for each product for the width across flats.
M5 0.17 7
1/8 0.3 9
1/4 1 12
3/8 1.5 14
1/2 2 17
Body size
Proper tightening
torque
[N
・
m]
Lock nut width
across flats
Caution
(1) If the fitting is tightened with excessive
torque, a large amount of sealant will seep
out. Remove the excess sealant.
(2) Insufficient tightening may loosen the
threads, or cause air leakage.
(3) Reuse
① Normally, fittings with a sealant can be
reused 2 to 3 times.
② To prevent air leakage through the sealant,
remove any loose sealant stuck to the fitting
by blowing air over the threaded portion.
③ If the sealant no longer provides effective
sealing, wrap sealing tape over the sealant
before reusing. Do not use the sealant in any
form other than a tape type.
(4) Once the fitting has been tightened, backing
it out to its original position often causes the
sealant to become defective. Air leakage will
occur.
Caution
(1)Refer to the Fittings & Tubing Precautions
for handing One-touch fittings.
Mounting
Piping Threads with Sealant
M5
10-32UNF
Female thread
size
Chamfered port size φD
（
Recommended value
）
5.1 to 5.4
5.0 to 5.3
Mounting
Piping

-7-
Caution
(2) 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.
(3) Winding of sealant tape
When screwing together pipes and fittings, etc.,
be certain that chips from the pipe threads and
sealing material do not get inside the pipe. Also,
when the sealant tape is used, leave approx. 1
thread ridges exposed at the end of the threads.
Caution
(1) Connection and disconnection of tube from
one-touch fitting
① Installation of tube
1) Cut the tube perpendicularly, being careful not
to damage the external surface. Use an SMC
tube cutter TK-1, 2, 3 or 6. Do not cut the tubing
with pliers, nippers, scissors, etc., otherwise
the tubing will be deformed and problems may
result.
2) The outside diameter of the polyurethane
tubing swells when internal pressure is applied
to it. Therefore, it may be impossible to re-
insert the tubing into One-touch fittings. Check
the tubing outside diameter, and when the
accuracy of the outside diameter is +0.07mm or
larger for φ2, and +0.15mm or larger for other
sizes, re-insert it into the One-touch fitting
without cutting the tube. When the tubing is re-
inserted into the One-touch fitting, confirm that
the tubing goes through the release button
smoothly.
3) Grasp the tubing, and slowly push it straight
(0 to 5°) into the One-touch fitting until it comes
to a stop.
4) Pull the tubing back gently to make sure it has
a positive seal. Insufficient installation may
cause air to leak or the tubing to release.
As a guide for checking if the tubing is pulled
out or not, refer to the following table.
Caution
② Removal of the tube
1) Push the release button flange evenly and
sufficiently to release the tube. Do not push in
the tubing before pressing the release button.
2) Pull out the tubing while keeping the release
button depressed. If the release button is not
held down sufficiently, the tubing cannot be
withdrawn.
3) To reuse the tubing, remove the previously
lodged portion of the tubing. If the lodged
portion is left on without being removed, it may
result in air leakage and make the removal of
the tubing difficult.
(2) Connection of a part with a metal rod
Do not connect a part with a metal rod (such as
KC series) to the one-touch fitting. If connected,
the one-touch fitting's chuck cannot retain the
metal rod, and the metal rod part may release
during pressurization, causing injury to the user
or an accident.
If a metal rod part is connected, it must not be
used with a tube, resin plug, or resin reducer;
such use may cause the tube, plug, or reducer to
release.
(3) When mounting the tube, resin plug or
metal rod, do not press the release button.
Do not press the release button unnecessarily
before mounting tubing, resin plugs and metal
rods. This can cause the disconnection of tube.
(4) When using a tubing other than from SMC,
confirm that the tube material and the O.D.
accuracy satisfy the following specifications.
1) Nylon tube ±0.1 mm max.
2) Soft nylon tube ±0.1 mm max.
3) Polyurethane tube +0.15 mm at max.
Within -0.2 mm
Do not use the tubing which does not satisfy the
specified tubing O.D. accuracy, or if the tubing
has a different I.D., material, hardness, or surface
roughness from those of SMC's tubing. If you
have any questions, please consult SMC. Failure
to satisfy the specifications may lead to difficulty
in connecting the tubing, leakage, disconnection
of the tubing, or fitting damage.
Piping
Precautions for One-Touch Tube Fittings
Piping
Precautions for One-Touch Tube Fittings
Piping

-8-
Caution
(1) When connecting piping to the One-touch
fitting, use a pipe length with sufficient
margin, in accordance with the piping
conditions shown in Figure 1.
Also, when using a tying band, etc., to bind the
piping together, make sure that external force
does not come to bear on the fitting.
(see Figure 2)
Warning
(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 the 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. This causes the malfunction of
pneumatic equipment.
If the drain bowl is difficult to check and
remove, the installation of a drain bowl with an
auto drain option is recommended.
For compressed air quality, refer to SMC catalog
"Compressed Air Purification System".
(4) Use clean air
Do not use compressed air that contains
chemicals, synthetic oils that include organic
solvents, salt, corrosive gases, etc., as it can
cause damage or malfunction.
Caution
(1) Install an air filter.
Install an air filter upstream near the valve.
For the filtration rating, select 5 μm or below, or
select a rating equivalent to or lower than
ISO 8573-1:2010 [6:4:4]
*
.
*This is equivalent to the filtration performance
achieved when an air filter is attached for inlet
side compressed air with purity class of [7:4:4].
(2) Ensure that the fluid and ambient
temperatures are within the specified range.
If the fluid temperature is 5
℃
or less, the
moisture in the circuit could freeze, causing
damage to the seals or leading to equipment
malfunction.
Therefore, take appropriate measures to
prevent freezing.
For compressed air quality, refer to SMC catalog
"Compressed Air Purification System".
Warning
(1) Do not use in an atmosphere containing
corrosive gases, chemicals, sea water, water,
water steam, or where there is direct contact
with any of these.
(2) Do not expose the product to direct sunlight
for an extended period of time.
(3) Do not mount the product in locations where
it is exposed to radiant heat.
Warning
(1) Perform maintenance and inspection
according to the procedures indicated in the
operation manual.
If handled improperly, malfunction or damage of
machinery and equipment may occur.
(2) Maintenance work
If handled improperly, compressed air can be
dangerous. Assembly, handling, repair and
element replacement of pneumatic systems
should be performed by a knowledgeable and
experienced person.
(3) Drain flushing
Remove drainage from air filters regularly.
Recommended Piping Conditions
Operating environment
Maintenance
Unit:mm
φ4, φ5/32"
56 or more 44 or more 26 or more 20 or more
φ6
84 or more 66 or more 39 or more 30 or more
φ1/4"
89 or more 70 or more 57 or more 32 or more
φ8, φ5/16”
112 or more 88 or more 52 or more 40 or more
Ø10
140 or more 110 or more 69 or more 50 or more
φ12
168 or more 132 or more 88 or more 60 or more
Tubing size Straight-line
length
Mounting pitch A
Nylon
tube
Soft nylon
tube
Polyurethane
tube
Air Supply
Air Supply

-9-
Caution
(4) Removal of equipment, and supply/exhaust
of compressed air
Before components are removed, first confirm
that measures are in place to prevent
workpieces from dropping, run-away equipment,
etc.
Then, Cut the supply pressure and electric
power, and exhaust all compressed air from the
system using the residual pressure release
function.
When machinery is restarted, proceed with
caution after confirming that appropriate
measures are in place to prevent sudden
movement.
Maintenance

-10-
3. Application
This product is designed to provide a temporary intermediate stop of a pneumatic actuator.
4. Specifications
Fluid
Air
Proof pressure 1.5MPa
Maximum operating pressure
1.0
MPa
Minimum operating pressure 0.1MPa
Ambient and fluid temperature -5 to 60
℃ (No freezing)
Applicable tube materials
(note 1)
FEP, PFA, Nylon, Soft nylon, Polyurethane, Polyolefin
Note1: Check the maximum operation pressure of the tubing.
Tubing with inner layer of materials is applicable.
SMC tubing ： TRBU(FR double layer), TRTU(FR three-layer), TRS(FR soft nylon), etc.
5. Troubleshooting
Trouble
Possible causes
Countermeasure
Speed cannot be
adjusted.
Check valve is the
wrong way
round.
Check the control method is suitable for operating
conditions, meter-out or meter-in.
Dust inside. Fully open the needle and apply air blow inside.
If the problem is not solved even after air blow,
install an air filter to the
upstream piping, and
replace the product with a new one.
Air leaks from the
One-touch fitting.
Or the tubing
disconnects.
Tubing has been cut using
pliers or nipper.
Use tube cutters.
T
he tolerance of the outside
diameter of the tubing in use
is beyond the specification.
When using a tubing other than from SMC, confirm
that the tube material and the O.D. accuracy satisfy
the following specifications.
1) Nylon tube ±0.1 mm max.
2) Soft nylon tube ±0.1 mm max.
3) Polyurethane tube +0.15 mm at max.
Within
-
0.2 mm

-11-
6. Construction
Seal method ： Gasket seal
For M5,10-32UNF
Seal method ： Sealant
For R,NPT thread
Seal method ： Face seal
For G thread
Meter
-
In
Meter
-
Out

Revision history
4-14-1, Sotokanda, Chiyoda-ku, Tokyo 101-0021 JAPAN
Tel: + 81 3 5207 8249 Fax: [phone]
URL https://www.smcworld.com
Note: Specifications are subject to change without prior notice and any obligation on the part of the manufacturer.
© 2023 SMC Corporation All Rights Reserved