Brochure

23
Design and Selection
Warning
1. Check the specifi cations.
The products in this catalog are designed to be used in com-
pressed air systems (including vacuum) only.
If the products are used in an environment where pressure or
temperature is out of the specifi ed range, damage and/or mal-
function may result. Do not use under such conditions. (Refer
to the specifi cations.)
Please contact SMC when using a fl uid other than compressed
air (including vacuum).
We do not guarantee against any damage if the product is
used outside of the specifi cation range.
2. The products in this catalog are not designed for the
use as stop valve with zero air leakage.
A certain amount of leakage is allowed in the product's specifi -
cations.
Tightening the needle to reduce leakage to zero may result in
equipment damage.
3. Do not disassemble the product or make any modifi -
cations, including additional machining.
It may cause human injury and/or an accident.
4. The flow-rate characteristics for each product are
representative values.
The fl ow-rate characteristics are characteristics of each indi-
vidual product. Actual values may differ depending on the
piping, circuitry, pressure conditions, etc.
5. 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.
6. Check if PTFE can be used in application.
PTFE powder (Polytetrafl uoroethylene resin) is included in the
seal material for piping taper thread of male thread type. Con-
fi rm that the use of it will not cause any adverse effect on the
system.
Please contact SMC if the Material Safety Data Sheet (MSDS)
is required.
Mounting
Warning
1. Operation Manual
Install the products and operate them only after reading the Opera-
tion Manual carefully and understanding its contents. Also, keep
the Operation Manual where it can be referred to as necessary.
2. Ensure suffi cient 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. After pushing the handle down to lock, confi rm that
it is locked.
It should not be possible to rotate
the handle to the right or to the
left. If the handle is pulled with
force, it may break. Do not pull
the handle with excessive force.
5. Check the degree of rotation of the needle valve.
The products in this catalog are retainer type so that the nee-
dle is not removed completely. Over rotation will cause dam-
age.
6. Do not use tools such as pliers to rotate the handle.
It can cause idle rotation of the handle or damage.
7. Verify the air fl ow direction.
Mounting backward is dangerous, because the speed adjust-
ment 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 actu-
ator speed decreases. When a needle valve is turned counter-
clockwise, it is open and actuator speed increases.
9. Do not apply excessive force or shock to the body
or fi ttings with an impact tool.
It can cause damage or air leakage.
Refer to the Fittings & Tubing Precautions in the
Best Pneumatics No. 6 catalog for handling One-
touch fi ttings.
Tubing O.D. ø2
Tubing other than that from SMC cannot be used, because it
may result in inability to connect the tube, air leakage after
connecting the tube or disconnection of the tube.
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 installa-
tion.
10.
11.
12.
Mounting
Warning
Locked Unlocked
Series AS-FS
Specifi c Product Precautions 1
Be sure to read this before handling. Refer to the back cover for Safety Instructions.
For Flow Control Equipment Precautions, refer to “Handling Precautions for SMC
Products” and the Operation Manual on SMC website, http://www.smcworld.com