Issue:
Getting Port B to be closed while Port A input will divert fluid to AB port until actuator signaled to allow B Port to open , closing A port
Product Line:
Valves and Actuators
Environment:
AV-39X Series Valve Linkage
Cause:
Product features
Resolution:
The Stem down operation of the AV-391 Actuator can be achieved by following instructions for the procedure on pages 9 and 10, in the attachment Bulletin below .
The Operations of the Valve for Divering, or Mixing is as follows..
Using Stem Down with a Diverting Valve, piped as a Mixing valve with AB Port as inlet, will not work. This is due to the B Port not closing when Stem is DOWN using a true Diverting Valven to mix.
AB Port would be closed using a VB-7323 Diverting valve as a mixing valve . VB-7313 Mixing Valve should be used for this application
For Diverting Valve : NOTING with a Diverting Valve, the "B" bottom Port, is always the Supply.
With the Stem UP "A" Port is CLOSED and Flow is from "B" Port to "AB" Port
With Stem Down AB Port is CLOSED and flow is between "B" Port to "A " Port
For Mixing Valve : NOTING with a Mixing Valve, the "AB" side Port, is always the Supply.
With Stem UP AB Port Flows to "B" Port and "A" Port is CLOSED
With Stem DOWN AB Port Flows to "A" Port and "B" Port is CLOSED
Truth Table for Diverting and Mixing Valve Ports VS Stem Position:
Getting Port B to be closed while Port A input will divert fluid to AB port until actuator signaled to allow B Port to open , closing A port
Product Line:
Valves and Actuators
Environment:
AV-39X Series Valve Linkage
Cause:
Product features
Resolution:
The Stem down operation of the AV-391 Actuator can be achieved by following instructions for the procedure on pages 9 and 10, in the attachment Bulletin below .
The Operations of the Valve for Divering, or Mixing is as follows..
Using Stem Down with a Diverting Valve, piped as a Mixing valve with AB Port as inlet, will not work. This is due to the B Port not closing when Stem is DOWN using a true Diverting Valven to mix.
AB Port would be closed using a VB-7323 Diverting valve as a mixing valve . VB-7313 Mixing Valve should be used for this application
For Diverting Valve : NOTING with a Diverting Valve, the "B" bottom Port, is always the Supply.
With the Stem UP "A" Port is CLOSED and Flow is from "B" Port to "AB" Port
With Stem Down AB Port is CLOSED and flow is between "B" Port to "A " Port
For Mixing Valve : NOTING with a Mixing Valve, the "AB" side Port, is always the Supply.
With Stem UP AB Port Flows to "B" Port and "A" Port is CLOSED
With Stem DOWN AB Port Flows to "A" Port and "B" Port is CLOSED
Truth Table for Diverting and Mixing Valve Ports VS Stem Position:
Released for:Schneider Electric USA
