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UF-1 and UFB-1 Valves Training Manual
- 6 - © 1999-2005, IMI Cornelius Inc.
The position of the piston inside the sleeve is determined by the upward pressure of the
liquid against the base of the piston and the downward pressure of the spring inside the
piston (not shown here). The pressure of the spring is regulated by the adjusting screw.
If the pressure of the liquid increases, the flow rate through the knife–edged orifice will
increase. The piston is moved upward closing off more of the outlet orifices. The same
flow rate is thereby maintained.
1.3 Adjusting Flow Rates
Flow rates of the water and syrup are adjusted based on the desired ratio. For example: if
the desired ratio is 5:1, then the flow rate of the water is 5 times that of the syrup.
If the desired finished drink total flow rate is 3.0 ounces per second, then the water flow
rate is 2.5 oz./sec and the syrup flow rate is 0.5 oz./sec. (The water at 2.5 oz./sec is five
times the 0.5 oz./sec syrup flow rate.)
Lower Fluid Pressure BUT
Syrup/Water Flow
Knife
edge
Same Volume Of
Syrup/Water Flows
From Orifices
Higher Fluid Pressure BUT
Lower Fluid
Pressure Pushing
Against Piston &
Spring
Higher Fluid
Pressure Pushing
Against Piston &
Spring
SYSTEM DETAILS