15
Piping and Operation
Caution
Mounting posture of the pump is set with the mounting foot facing downward. Air to be supplied to
the air supply port <AIR SUP> should be cleaned and filtered through AF filter, etc. Air with foreign
matter or drainage etc. will have negative effects on the built-in directional control valve and will lead
to malfunction. When air needs additional purification, use a filter (AF series), and a mist separator
(AM series) together. Maintain the proper tightening torque for fittings and mounting bolts, etc.
Looseness can cause problems such as fluid and air leaks, while over tightening can cause damage
to threads and parts, etc.
Starting and Stopping Refer to circuit example (1)
1. Connect air piping to the air supply port <AIR SUP> and connect piping for the fluid to be
transfered to the suction port <FLUID IN> and the discharge port <FLUID OUT>.
2. Using a regulator, set the pilot air pressure within the range of 0.2 to 0.5 MPa. Then, the pump
operates when power is applied to the 3 port solenoid valve of the air supply port <AIR SUP>, the
sound of exhaust begins from the air exhaust port <AIR EXH> and fluid flows from the suction
port <FLUID IN> to the discharge port <FLUID OUT>.
At this time, the throttle on the discharge side is in an open state. The pump performs suction with
its own power even without priming. (Dry state suction lifting range: up to 0.5 m) To restrict
exhaust noise, attach a silencer (AN20-02: option) to the air exhaust port <AIR EXH>.
3. To stop the pump, exhaust the air pressure being supplied to the pump by the 3 port solenoid
valve of the air supply port <AIR SUP>. The pump will also stop if the throttle on the discharge
side is closed.
Discharge Flow Rate Adjustment
1. To adjust the flow rate from the discharge port <FLUID OUT>, use the throttle connected to the
discharge side. Refer to circuit example (1). Note that this product cannot be used as a fixed
quantity liquid dispense pump.
2. When operating with a discharge flow rate below the specification range, provide a by-pass circuit
from the discharge side to the suction side to ensure the minimum flow rate inside the process
pump. With a discharge flow rate below the minimum flow rate, the process pump may stop due
to unstable operation. Refer to circuit example (2). (Minimum flow rates: 1 L/min)
<Reset Button>
When the pump stops during operation, press the reset button. This makes it possible to restore
operation in case the switching valve be-comes clogged due to foreign matter in the supply air.
<Air Operated Reset Port>
It is possible to restore operation by supplying air to the air operated reset port without directly
pressing the reset button, such as by remote control. Pressure equivalent to or greater than pilot
air pressure (but less than 0.5 MPa) is required to reset air. Refer to air operated reset circuit
example (3).
Circuit example (1)
Circuit example (2)
Process Pump
Bypass
Air
supply
Regulator
3 port
solenoid valve
Air
SUP
Air
EXH
Silencer
Transfer fluid
FLUID
OUT
FLUID
IN
Process
Pump
Air filter
Strainer
Throttle
Circuit example (3)
3 port solenoid
valve for remote
reset
Air supply
PA(P)3310
Air operated
reset port
