• Innovative solution to reduce the size of vending machines
• Increase space for ingredient storage
• Eliminates the need for a header tank, level controls and pumps

• Venturi Valve Datasheet
• Other Venturi Effect Valves

Typical Vending Example

Operation

1. On initial heating, cold water in the boiler expands into the expansion vessel via the venturi mounted in the dispense valve.
2. Water in the boiler and the expansion vessel reach a final temperature set by the thermostat.
3. When a drink is dispensed both solenoid valves open, fresh cold water from the inlet valve displaces hot water through the dispense valve. The boiler is never pressurised because it is always open to atmosphere via the venturi and an appropriate flow control for the inlet valve restricts inlet flow to match the outlet flow.
4. As hot water flows through the dispense valve the venturi draws water from the expansion vessel, when the water in the expansion vessel is exhausted the venturi draws air, this has no significant effect on the volume dispensed.
5. At the end of the dispense cycle both valves close.

Patents pending:

• US Patent Application No. 09/436,523
• European publication EPI000575