TWO-WAY RUBBER-TUBE-TYPE PNEUMATIC DIRECTIONAL VALVE MECHANISM

Fluid (air or liquid) enters through port 1, flows through radial passages in member 2 and is discharged through the port in member 4 (Fig. a). When pilot (compressed) air is admitted through port 5, rubber tube 3 is compressed and it blocks the flow of air through the radial passages (Fig. b).
$3696$SHP,FC$