SMC Networks HF2A-ASG V Series User manual

Doc. no. DOC1057905
PRODUCT NAME
Water Resistant Stainless Steel
Speed Controller with One-touch Fitting
MODEL / Series / Product Number
HF2A-ASG ＊＊＊＊ - ＊＊ V

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

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Water Resistant Stainless Steel Speed Controller
with One-touch Fitting / HF2A-ASG-V 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.

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Water Resistant Stainless Steel Speed Controller
with One-touch Fitting / HF2A-ASG-V 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.

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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.
(7) Speed controllers are designed to control the
speed of the actuator.
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 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.
(7) Do not use tools such as pliers to rotate the
knob.
It can cause idle rotation of the knob or damage.
Design/Selection Mounting

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Warning
(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.
Connection
Thread size
Wrench(nominal)
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
Warning
(13) 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.
Body size Maximum allowable
torque [N ・ m]
M5 0.03 ～ 0.05
1/8 0.06 ～ 0.17
1/4 0.06 ～ 0.23
3/8 0.10 ～ 0.25
1/2 0.10 ～ 0.40
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 body A, this may
cause the body A 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.
Mounting Mounting
Body B
Body A

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Caution
(4) 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.
Refer to the table below for reference values.
Connection
thread size
Proper tightening torque
[ N ・ m ]
M5, 10-32UNF 1 ～ 1.5
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
In compliance with ISO 16030 (air pressure fluid
dynamics-connection-ports and stud ends), the
chamfered dimensions shown in the table below are
recommended.
Connection
thread size
Chamfer dimension
ΦD[mm]
(Recommended value)
M5 5.1 ～ 5.4
10-32UNF 5.0 ～ 5.3
(5) For R, NPT, G thread
① Tightening 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.
Connection
thread size
Proper tightening torque
[ N ・ m ]
1/8 3 ～ 5
1/4 8 ～ 12
3/8 15 ～ 20
1/2 20 ～ 25
Caution
② Chamfered 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.
Body
size
Proper tightening torque
[ N ・ m ]
Lock nut width
across flats
M5 0.17 9
1/8 0.3 11
1/4 1 14
3/8 1.5 19
1/2 2 22
(7) Tighten the lock nut while holding the knob by
hand. Otherwise, the knob may turn with the lock
nut and the flow rate may change.
connection
thread
size
Chamfer dimension ΦD[mm]
(Recommended value)
Rc NPT, NPTF 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
Mounting Mounting

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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.
(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.
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.
Piping Threads with Sealant
Piping
Precautions for One-Touch Tube Fittings
Piping

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Caution
(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.
(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.
Tubing
size
Mounting pitch A [mm] Straight-
line
Pipe length
[mm]
Nylon
tube
Soft nylon
tube
Polyurethane
tube
φ4,
φ5/32”
56or more 44or more 26or more 20or more
φ6 84or more 66or more 39or more 30or more
φ1/4” 89or more 70or more 57or more 32or more
φ8,
φ5/16”
112or more 88or more 52or more 40or more
φ10 140or more 110or more 69or more 50or more
φ3/8” 134or more 105or more 69or more 48or more
φ12 168or more 132or more 88or more 60or more
φ1/2” 178or more 140or more 93or more 64or more
Air Supply
Precautions for One-Touch Tube Fittings
Piping
Precautions for use with non-SMC tubing
Recommended Piping Conditions

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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".
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.
Caution
(1) Check the following items when cleaning the
product.
① Clean the fitting while it is still connected to the
equipment.
Do not clean when the tubing and body are not
connected.
② Fully tighten the lock nut before cleaning.
③ Check the conditions before cleaning.
Make sure to use under conditions in which the
speed controller material will not be affected or
damaged by chemical solution, temperature, or
water pressure.
As a guide, it is permissible to use under the
conditions subject to dust and water. (equivalent to
IP65.)
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
Air Supply

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3. Application
This product is designed to control the speed of a pneumatic actuator.
4. Specifications
*1 Pay attention to the maximum operating pressure for soft nylon and polyurethane.
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.
Fluid Air
Proof pressure 1.5 MPa
Max. operating pressure 1.0 MPa
Min. operating pressure 0.1 MPa
Ambient and fluid temperature 0 to 150
℃
(No freezing)
Applicable tubing material
*1
FEP, PFA, Nylon, Soft nylon, Polyurethane, Polyolefin

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6. Construction
Seal method: Sealant
For R, NPT thread
Seal method: Gasket seal
For M5, 10-32UNF
Seal method: Face seal
For G thread
Meter-out
Com ponentParts
Meter-in Meter-out
Meter-out
No. Description Material
Note
1 Body A
Stainless steel
2 Body B Stainless steel
3 Needle
Stainless steel
4 Knob
Stainless steel
5 Lock nut
Stainless steel
6 C-ring
Stainless steel
7 Seat ring Aluminum alloy
8 U-seal FKM
9 O-ring FKM
10 O-ring FKM
11 Handle seal FKM
12 Seal FKM
13 Cassette
Stainless steel
14 Gasket
Stainless steel・FKM
M5,U10-32 type
15 Seal FKM G thread type

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.
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