Algas SDI VAPORAIRE M-Series, Operation & Maintenance Manual

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Operation
SDI Operations & Maintenance Manual – 54264
4-31
LPG/Air Venturi Type Mixers
The venturi assembly produces mixed gas. High pressure LPG vapor is
introduced into the venturi nozzle. It accelerates through the venturi nozzle
forming a vacuum as it exits the nozzle. That vacuum draws in air through the
venturi check valve that is then mixed with the LPG vapor. This gas/air mixture is
carried into the diffuser where it decelerates and gains pressure as it fills the
mixed gas surge/accumulator tank. The mixed gas is held in the
surge/accumulator tank at a pressure controlled by the
SEQUENCER
until
withdrawn through the mixed gas discharge valve.
Figure 12 - LPG/Air Venturi Assembly Diagram
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LPG-Air Venturi Mixer Diag.wmf
1. Motive pressure gauge 7. O-ring
2. Sealing washer 8. Venturi nozzle
3. Air inlet 9. Venturi housing gasket
4. Venturi check valve 10. Venturi cover
5. Mixed gas to surge/accumulator 11. High pressure LPG vapor
6. Venturi diffuser