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Thread: Silvia OPV adjustment

  1. #1
    Senior Member
    Join Date
    Dec 2010

    Silvia OPV adjustment

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Is there any difference (when measuring waterflow out the OPV return tube) between using a blind filter, and using the hot water supply with the steam valve closed? they should both activate the OPV, no?

  2. #2
    Senior Member
    Join Date
    Aug 2010
    Do you mean running the pump (middle switch) as you would to flush the steam wand but against a closed steam valve? The OPV does not appear to activate in the Silvia with this procedure and would probably lead to damage to the pump.

  3. #3
    Not a Shoe Jimmytheboot's Avatar
    Join Date
    Jan 2009
    There is no difference, a blind filter blocks water flow the same as a closed solenoid, the OPV is mechanical and reacts to excess pressure the same regardless of how its created

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