SMC Networks ASB Series User manual

Doc. no. AS*-OMZ0085
PRODUCT NAME
METAL SPEED CONTROLLER WITH ONE-TOUCH FITTING
MODEL/ Series/ Product Number
ＡＳＢ - ＊＊＊＊ - ＊＊
ＡＳＢ＊＊＊＊ - ＊＊Ｄ＊

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 ～12
-1-

- 2 -
Metal Speed Controller with One-touch Fitting
ASB, ASB-D 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 relating to systems.
ISO 4413: Hydraulic fluid power -- General rules relating to systems.
IEC 60204-1: Safety of machinery -- Electrical equipment of machines .(Part 1: General requirements)
ISO 10218: 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
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. 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 equipment in conjunction with atomic energy, railways, air navigation, space, shipping,
vehicles, military, medical treatment, combustion and recreation, or equipment in contact with food and
beverages, emergency stop circuits, clutch and brake circuits in press applications, safety equipment 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 requiring special safety
analysis.
4.Use in an interlock circuit, which requires the provision of double interlock for possible failure by using a
mechanical protective function, and periodical checks to confirm proper operation.

- 3 -
Metal Speed Controller with One-touch Fitting
ASB, ASB-D Series
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
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.
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.
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 regulation 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.
Caution
SMC products are not intended for use as instruments for legal metrology.
Measurement instruments that SMC manufactures or sells have not been qualified by type approval tests
relevant to the metrology (measurement) laws of each country.
Therefore, SMC products cannot be used for business or certification ordained by the metrology
(measurement) laws of each country.

- 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)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.
(5)Sonic conductance and critical pressure
ratio values for products are representative
values.
For controlled flow direction values the
needle is fully open. For free flow direction
values the needle fully closed.
(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)Use R external threads with Rc internal
threads and NPT external threads with NPT
internal threads and G external threads with
G internal threads.
(5)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.
(6)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.
Design/ Selection
Mounting
Design/ Selection

- 5 -
Warning
(7)Do not use tools such as pliers to rotate the
knob. (ASB series only)
It can cause idle rotation of the knob or
damage.
(8) Verify the air flow direction.
Mounting backward is dangerous, because the
speed adjustment needle will not work and the
actuator may lurch suddenly.
(9)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.
(10)Do not apply excessive force or shock to
the body or fittings with an impact tool.
It can cause damage or air leakage.
(11)For handling One-touch fittings, refer to the
Fittings and Tubing Precautions.
(12)To install/remove the product, use an
appropriate wrench to tighten/loosen at the
supplied nut on Body B.
Do not apply torque at other points as the
product may be damaged. Rotate Body A
manually for positioning after installation.
Please refer to the applicable dimension of the
wrench.
* A product of the ASB series is shown in the
picture.
Warning
(13) The handle of this product is attached only
by press fitting. (ASB series only)
Excess torque may break the product.
The table below shows the maximum
allowable torque of the handle.
(14) Refer to the table below for the applicable
operating torque and recommended driver
of the needle.
Corresponding international standard:
ISO/DIS 2380-1,ISO 2380-2
Mounting
Mounting
M5 0.03～0.05
01 0.15～0.17
02 0.21～0.23
03 0.23～0.25
04 0.38～0.40
Body size
Maximum
allowable torque
N・m
Metric size
Inch size
M5、10-32UNF 9 23/64
R1/8、NPT1/8、Ｇ1/8 13
1/2
R1/4、NPT1/4、Ｇ1/4 17 11/16
R3/8、NPT3/8、Ｇ3/8 22 7/8
R1/2、NPT1/2、Ｇ1/2 27 1-1/16
Connection thread size
Wrench（nominal）

- 6 -
Caution
(1)When performing the piping work, turn the
tightening tool in the horizontal direction to
the hexagon across flats of the body B so
that any moment is not applied to the body.
If the tool is in contact with the bodyA, this may
cause the bodyA to come off.
(2) Body A can be slightly rotated for
positioning, but it cannot be used as a
continuous rotating part.
This will cause metal debris by wearing, which
may enter the operating fluid or cause fitting
damage.
(3) If the connection tube oscillates or turns, do
not use this product.
It may cause damage to the product body or
the fitting.
When there is any possibility of having
oscillation or rotation of the body A, have the
tubing secured when using the product.
(4)For M5, 10-32UNF
①Tightening method
First, tighten it by hand, then give it an additional
1/6 turn to 1/4 turn with a wrench.
Refer to the table below for reference values.
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.
②Chamfered area for female thread
In compliance with ISO 16030 (air pressure fluid
dynamics-connection-ports and stud ends), the
chamfered dimensions shown in the table below
are recommended.
Caution
Caution
(5)For R, NPT, G thread
①Tightening method
To tighten the screws, hand tighten them first and
then tighten them across flats of body B by
rotating them for two or three rotations using an
appropriate wrench.
Refer to the reference values in the table below
for the tightening torque.
②Chamfered area for female thread
By chamfering as shown in the following table,
machining of threads is easier and effective for
burr prevention.
G thread (face seal) complies with ISO
16030-2001.
(6)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.
Mounting
Mounting
M5、10-32UNF 1 to 1.5
Connection
thread size
Proper tightening torque[N・m]
1/8 3 to 5
1/4 8 to 12
3/8 15 to 20
1/2 20 to 25
Connection
thread size
Proper tightening torque[N・m]
Rc NPT G
1/8 10.2～10.4 10.5～10.7 9.8～10.2
1/4 13.6～13.8 14.1～14.3 13.3～13.7
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
Chamfer dimension φD
（Recommended value）
Connection
thread size

- 7 -
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
①Normally, fittings with a sealant can be
reused 2 to 3 times.
②To prevent air leakage through the sealant,
remove any loose sealant stuck to the fitting
by blowing air over the threaded portion.
③If 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.
(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
①Installation 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.
②Removal 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 the metal rod accessories
Plug-in fittings with metal rods (KC series, KQ2
series, former KQ series, KN series, KM series,
etc.) cannot be connected to one-touch fitting.
If connected, the metal rod cannot be retained
by the chuck of the one-touch fitting and
products with metal rods may project during
pressurization, causing serious personal injury
or accident.
Even when products with metal rods can be
connected, do not use any tube, resin plug, or
resin reducer after connection. This may cause
detachment.
Precautions for One-Touch Tube Fittings
Piping
Piping Threads with Sealant
Piping

- 8 -
Caution
(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.
Caution
(1) When used with tubing other than those
from SMC, the product will be outside the
warranty due to the unverified connection
with the one-touch fitting.
(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.
Select an air filter with a filtration size of 5μm
or smaller.
(2)Take 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 the malfunction of
pneumatic equipment, such as flow control
equipment. Therefore, take appropriate
measures to ensure air quality, such as by
providing an aftercooler, air dryer, or water
separator.
(3) 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".
Air Supply
Recommended Piping Conditions
Precautions for use with non-SMC
tubing
Unit:mm
Nylon
tube
Soft nylon
tube
Polyurethane
tube
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
φ10 140 or more 110 or more 69 or more 50 or more
φ3/8” 134 or more 105 or more 69 or more 48 or more
φ12 168 or more 132 or more 88 or more 60 or more
φ1/2” 178 or more 140 or more 93 or more 64 or more
Straight-line
Pipe length
Mounting pitch A
Tubing size
Piping

- 9 -
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 use in a place subject to heavy
vibration and/or shock.
(4)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.
(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
Operating environment

- 10 -
3. Application
This product is designed to control the speed of a pneumatic actuator.
4. Specifications
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.
Tubing of a brand other than
SMC is used.
Use of SMC tubing is recommended since the
product will be outside the warranty when
tubing of a brand other than SMC is used.

- 11 -
6. Construction
ASB Series

- 12 -
ASB-D Series

S
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.
© 2022 SMC Corporation All Rights Reserved