13
9. Construction and operating principle
When compressed air is supplied to air supply port within 0.2~0.5MPa, internal directional control
valve operates and diaphragm starts reciprocation.
10. Operating principle
Air is supplied in actuating chamber shown in Fig. 1 fluid in pump chamber is flowed out.
Meanwhile, pump chamber B sucks fluid.
When pilot valve is pushed out at stroke end, built-in directional control valve is shifted, and starts
reverse operation (Fig. 2). This repeated operation realizes continuous suction and discharge.
Air exhaust port
(AIR EXH)
Air supply port (AIR SUP)
Discharge port (FLUID OUT)
Suction port (FLUID IN)
Pump chamber A
Check valve
Drive chamber B
Pump chamber B
Drive chamber A
Pilot valve B
Pilot valve A
Diaphragm A
Diaphragm B
Shaft
Switching valve
Actuating
chamber
A
Actuating
chamber B
Discharge
port
Pump
chamber B
Pump
chamber A
Suction
port
Pump
chamber A
Diaphragm
Suction
port
Discharge
port
Pump
chamber B
Actuating
chamber A
Actuating
chamber B
Fluid flow
Air flow
Fig. 1
Fig. 2
