6
A
a1
a2
B
b1
b2
AWN13
3.10
3.10
6.20
AW17
6.70
6.70
13.40
AW20
14.80
14.80
29.60
AW28
34.60
34.60
69.20
KTM
PNEUMATIC ACTUATORS - AW, AWN SERIES
INSTALLATION AND OPERATION MANUAL
SECTION 10 - AIR SUPPLY FLOW RATE
The volume of air necessary for cylinder
operation is determined to obtain the following
two types of flow rates:
1. Momentary Flow Rate QD, QS
Calculation of the momentary flow rate
is necessary to determine operating
time. The shorter the operating time
with the same cylinder size, the larger
the momentary flow rate. In order to
obtain the desired operating time, the
supply source capacity, piping diameter,
pressure reducing valve capacity, solenoid
valve orifice diameter (C
v
value), etc. are
necessary. This enables the momentary
flow rate to be determined by the following
formulas (1) and (1’). If multiple cylinders
are operated simultaneously, then the
capacity of each devices used, multiplied
by the number of cylinders will provide the
momentary flow rate.
Momentary flow rate of Double Acting cylinder:
( )
Momentary flow rate of Spring Return type
Cylinder: ( )
2. Air consumption VD, VS
This shows the volume of air consumed
in a period of time. For the same size
cylinder, air consumption increases in
direct proportion to the operating time.
The consumption is determined by the
following formula. Incidentally, the total
air consumption is identical to a sum value
obtained for the total units.
Air Consumption of Double Acting cylinder:
( )
Air Consumption of Spring Return type cylinder:
( )
Remarks
Q
D
= Momentary flow rate in Double Acting
cylinder (
)
Q
S
= Momentary flow rate in Spring Return
type cylinder (
)
V
D
= Air Consumption of the Double Acting
cylinder (
)
V
S
= Air Consumption of the Spring Return
type cylinder (
)
A, B = Cylinder capacity (
)
P
= Operating pressure (MPa)
T
= Operating time (Sec)
n
= Operating cycles in a time period
(One cycle means one reciprocating
action)
FIGURE 7
Cylinder
model
Cylinder capacity (
ℓ
)
A
B
A + B
SECTION 11 - CAUTIONS PRIOR TO OPERATION
1. Check air leakage in pipeline from
compressor or tank to supply port by using
soap liquid or leak check liquid.
2. Be sure that supplying compressed air
pressure is within the range specified in
Section 5 “Range of Application”.
3. Check electric power supply voltage of
solenoid valve.
4. Check air pressure of filter regulator outlet
port if attached.
5. Check speed of speed controller or quick
exhaust valve if attached.
6. Ensure that the actuator and valve travel
smoothly by operating accessories (solenoid
valve, air operate valve, positioner, etc.).
7. Ensure that electric wiring of solenoid valve
or limit switches are shielded by cable
gland, cable protection tube, etc. Wiring
port should be directed in horizontal and
downward position.
SECTION 12 - CAUTIONS DURING OPERATION
1. Use clean and dry compressed air through
dryer and filter. (Dew point below -15ºC).
Drain sufficiently to prevent freezing
especially in cold areas.
2. Periodical draining of filter or filter regulator
should be performed.
3. Supply lubricating oil (turbine oil JIS K2213,
ISO VG32 with additives) periodically to
lubricator.
CAUTION
Do not use machine oils and spindle oils, which
may cause troubles.
4. Manual operation is inhibited while
automatic operation.
WARNING
Never place or leave lever handles, spanners and
wrenches at the upper portion of the
stem. They are driven while operation and cause
human injury and equipment damages.
