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2. Principles of Operation
The Yamada Air-powered Pump is a reciprocating type that is driven by compressed air.
The pump consists of an air motor to drive the pump and a lower pump to draw up the
material as shown in the figure.
Air
Exhaust
Connecting
rod
When compressed air is supplied from the compressor to the air motor, the air piston starts
its up/down motion by the function of the air switching mechanism built in it.
This motion is transmitted to the piston of the lower pump by the connecting rod that
connects between the air piston of the air motor and the piston of the lower pump, thereby
giving the up/down motion to it.
When the up/down reciprocating motion of the piston of the lower pump is performed, the
material is sucked into the lower pump and fed out from the discharge port by pressure.
3. Installation
3.1 Installing the Drum-Pump
1) Remove the plug at the injection port (2B) of the drum can and screw the bang adapter
attached to the pump. (Fig.1)
2) Insert the pump in the bang adapter. When the lower end (foot valve) of the pump
touches the bottom of the drum can, lift the pump 2 or 3 cm to make a clearance between
the foot valve of the pump and the bottom of the drum can, and fix the pump by tightening
the thumb screw of the bang adapter.
- When using a vessel with cover such as
drum can, be sure to loose the vent plug so
that the inside of the vessel may not form a
vacuum.
Chamber A
Air cylinder
Piston assy
Air Motor
Chamber B
Lower pump
Piston assy
CAUTION
Air supply
Material
hose
2
Trip rod
Reversing body
Spring
Reversing bar
Exhaust valve
Air supply valve
Exhaust
Air regulator
Hose
Air hose
union
Bang adapter
Vent
plug
Fig.1
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