16
Piping and Operation
Caution
Mounting posture of the pump is set with the mounting foot facing downward. 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
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
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 0.5m) To restrict exhaust noise, attach
a silencer to the solenoid valve air exhaust 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. 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.
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)
Circuit example (2)
Recommended Valve
VQZ24
□
0 (Exhaust center)
