2．Specific Product Precautions 4 - SMC Networks ASD F-A Series Operation Manual

2. Specific Product Precautions
Design/ Selection
Warning
(1) Confirm the specifications.
This product is designed to be used only in a
compressed air system (including vacuum).
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. 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.
needle to reduce leakage to zero may result in
equipment damage.
(3)Do not disassemble the product or make
any modifications, including
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. Also, depending on
product specifications, there may be variations
in the zero needle rotations position of the flow
rate characteristics.
(5)Sonic conductance
pressure ratio (b) values for products are
representative values.
For controlled flow direction and free flow
direction values the needle is fully open.
(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.
Tightening the
additional
(C) and critical
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)After pushing the knob down to lock,
confirm that it is locked.
It should not be possible to rotate the knob to
the right or to the left. If the knob is pulled
with force, it may break. Do not pull the knob
with excessive force.
locked
(5)Check the degree of rotation of the needle
valve.
The Products in this catalog are retainer type
so that the needle is not removed completely.
Over rotation will cause damage.
(6)This product has a stopper for fully close in
rotating direction.
break the stopper. Table below shows the
maximum allowable torque of the knob.
4
Mounting
Knob
unlocked
Excess torque may