ROTARY SYSTEM |
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PUMP SIZE |
MAXIMUM DISPLACEMENT |
3A |
27µl |
2A |
54µl |
A |
109µl |
B |
295µl |
C |
739µl |
D |
1478µl |
16mm |
1886µl |
ROTARY PUMPS
Rotary systems use an offset drive to create simultaneous rotary and linear motion on the piston. Each single 360° rotation of the motor results in an intake and discharge cycle. The stroke length of the piston (displacement) is mechanically adjusted. The rate the piston travels is electronically adjusted through the motor speed. Rotary systems can be configured into single or multiple channel metering or dispensing systems. The flow profile of a single stroke (volume over time) is sinusoidal. The fluid delivery can be in individual strokes or multiple strokes. Stroke selection is a Controller Module setting. Multiple strokes can be delivered up to 1800 per minute (1500 motor RPM). Rotary Motor/Base Modules can be single ended (single shafted motor with one Pump Module) or dual ended (double shafted motor with two Pump Modules – one on each end).
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1. the piston is shown at bottom dead center of its stroke. both inlet and outlet ports are closed and piston flat is rotating toward the inlet port.
| 2. suction is created during the intake stroke by the piston retracting inside the cylinder. the piston flat opens the inlet port to the pump chamber and the outlet port is closed. | ||
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| 3. the piston is shown at top dead center of its stroke. both the inlet and outlet ports are closed and piston flat is rotating toward the outlet port. | 4. positive displacement is created during the discharge stroke as the piston advances inside the cylinder. the piston flat opens the outlet port to the pump chamber and the inlet port is closed. | ||
