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    Can the ATV630 be programmed to help with check valve slamming?

    Issue:
    Can the ATV630 be programmed to help with check valve slamming?

    Product Line:
    Altivar Process Drive ATV630, ATV660

    Environment:
    All

    Cause:
    Check Valve Slamming when stopping a pump

    Resolution:
    There are parameters under [Complete Settings] > [Pump Functions] > [Pump Start / Stop] which allow you to change the Deceleration Curve.
    NOTE:  1st ensure that the customer does not have their valve in a "Cushion Check" configuration which works off of back pressure. They would be able to actuate the valve by hand if it is. If their system doesn't have back pressure, the check valve was slamming, and may have to be replaced or may have a pin that can be pulled on the valve to correct the configuration.

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