Why is the TPV on the hot water branch leading to the high-pressure wash cycle water cooler in the off position when there is no instrument air? ?
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This post was last edited by wpw121 on 2010-7-15 at 17:30. Why is the TPV on the hot water branch of the high-pressure wash cycle water cooler in the closed position when there is no instrument air? ?
To prevent a sudden drop in the high-temperature water temperature in the event of a loss of instrument air, a normally open valve is used, which closes when the instrument air is interrupted.