SMC Networks PA3000 Series, Manual, Page: 8 / 29

Piping and Operation: Air Operated Type
<Starting and Stopping> Refer to circuit example
1.
Connect air piping
Note 1)
to the pilot air supply port <P1>, <P2> 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 0.1 to 0.5 MPa. Then, the pump operates when power is applied to the
solenoid valve
Note 2)
of the pilot air supply port and fluid flows from the suction port <FLUID IN> to the discharge port <FLUID OUT>. At
this time, the ball valve 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: PA3 1 m, PA5 up to 0.5 m
Note 3)
) To restrict exhaust noise, attach a silencer to the solenoid valve air ex-
haust port.
3.
To stop the pump, exhaust the air pressure being supplied to the pump with the solenoid valve of the air supply port.
Note 1) When used for highly permeable fluids, the solenoid valve may malfunction due to the gas contained in the exhaust. Implement
measures to keep the exhaust from going to the solenoid valve side.
Note 2) For the solenoid valve, use an exhaust center 5 port valve, or a combination of residual exhaust 3 port valve and a pump drive 4
port valve. If air in the drive chamber is not released when the pump is stopped, the diaphragm will be subjected to pressure and
its life will be shortened.
Note 3) When the pump is dry, operate the solenoid valve at a switching cycle of 1 to 7 Hz. If operated outside of this range, the suction
lifting height may not reach the prescribed value.
<Discharge Flow Rate Adjustment>
1.
The flow rate from the discharge port <FLUID OUT> can be adjusted easily by changing the switching cycle of the solenoid valve on
the air supply port.
Circuit example (1)
Air filter
Ball valve
Process Pump
Process Pump
Strainer
Strainer
Transfer fluid
Transfer fluid
P1
P2
P1
P2
FLUID
OUT
FLUID
IN
FLUID
OUT
FLUID
IN
Air supply
Air supply
Regulator
Air filter Regulator
5 port
solenoid valve
(Exhaust center)
3 port
solenoid
valve
4 port
solenoid
valve
Circuit example (2)
Discharge
port
FLUID OUT
Suction port
FLUID IN
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.
Caution
Recommended Valve
PA3
첸
13
PA5
첸
13
VQZ14
첸
0 (Exhaust center)
VQZ24
첸
0 (Exhaust center)
For related products, refer to page 728 and 729.
Piping diagram
Operation
Pilot air supply port: P1
AIR SUP
Solenoid valve
Pilot air supply port: P2
AIR SUP
676
Series
PA
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