Document No.:KE-4011-03 Page: 5/27
10. Supply of Air Operation Pressure
10.1 For the actuator factory-assembled with a solenoid valve, provide the air tubing between the air
compressor and the solenoid valve. Air inlets are Rc 1/4.
10.2 Use copper, coated copper or plastic tubes of an adequate diameter and wall thickness. Clean
tube bores to remove all foreign residues and tightly seal all connections to avoid leakage of air
during a travel from the compressor.
10.3 If you want to mount your own solenoid valves other than those factory-assembled, select the
following type. For FBS actuators, 3-way or 4-way solenoid valves with plug up just one port are
used.
10.4 Air inlets are Rc1/4. Use hexagonal fittings of 19mm and smaller width of flat . Contact KITZ
Corporation for technical advice, if you want to use larger tubes for faster operation of actuators.
10.5 Keep the air always free from dust and moisture ( -15℃ or lower dew point under the atmospheric
pressure ), using air-filters and air-dryers.
10.6 Choose the capacities of your own accessories and the sizes of auxiliary air tubing, in consideration
of possible loss of air pressure during a travel from the compressor.
10.7 The exact volume (Q) of air supply required per minute for actuators must be known before the air
tubing installation so that the provided operation pressure may be sufficient to properly drive
actuators and valves. Calculate your air supply requirement with the following equation.
10.8 The required air pressure must be kept constant at the air inlet of an actuator. Insufficient air
supply causes intermittent piston drive and results in malfunction of actuators.
Q = V(P + 0.1013) / 0.1013 x 60/t [L /min.(ANR)]
V: Volume of actuator housing [L] ( V1 or V2 in Section 10 )
P: Air operation pressure [MPaG]
t: Time required per stroke [second] under 0.39MPa operation pressure,
where no valve nor accessory is provided. ( Refer to Table 1 )
ANR: Air supply volume under the standard condition of 20℃ ( 68°F ),
760mmHg absolute pressure and 65% relative humidity
Fig2. Design of solenoid valve mounting pad( air inlet/outlet ports )
Actuator type
Time[sec]
FBS-1
0.2
Table 1.
Time [t] required per
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