The upper and the lower valve housing are each equipped with a valve seat. The
chamber between the two valve disks is connected to the open environment by
an isolation outlet (3) integrated into the lower valve stem. In the event of seal
damage, the leaking fluid can safely flow into the open. Defective seals can thus
easily be detected. Under normal operating conditions, liquid from one pipe is
prevented from entering the other pipe.
The cleaning of the leakage drain system occurs independently from the opening
and closing of the valve.
A cleaning liquid is supplied to the leakage drain system via a separate
connection (1) arranged in the lantern. The cleaning fluid is sprayed into a cavity
between both of the valve discs over a ring nozzle (2) and flows out through a
drain free of pressure.
The cleaning fluid flows out of a CIP-cleaning unit.
Cleaning fluid data
•
Service pressure: min. 2 bar (29 psi), max. 5 bar (72.5 psi)
•
Service temperature: max. 135 °C (275 °F)
Description
430BAL008451EN_2
24.10.2017
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Summary of Contents for VARIVENT Y
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