Product Manual

In normal filtration operation the air flow is directed into the filter element and passes through
several filter media layers before being guided to the outlet port of the filter. When the inPASS™
valve is activated, the compressed air flow is redirected through this valve to the filter outlet. This
creates the opportunity to depressurize the filter housing, using the drain valve at the bottom of
the filter, and service the filter element. As a result, there is no need any more to install the filter
in a 3-valve bypass.
Refer to section Filter element change for the instructions on filter element service on an
inPASS™ filter.
During service while the inPASS™ valve is activated, there can be an increased
pressure drop over the filter housing up to 1 bar(e) or 15 psig, depending on the size
of the filter and the working conditions.
The DD+, PD+, UD+, DDp+ and PDp+ filters that are equipped with an inPASS™ valve will also
have a smart service indicator installed for all sizes. At start-up and during normal operation, this
digital pressure drop indicator will show pressure drop indication in a range from 0 to 750 mbar,
running hours and days in use. Above predefined pressure drops, running hours or days in use, a
warning and alarm signal (LED or external alarm contact) will be activated.
•
Warning mode: Flashing LED indicates a warning mode, meaning service is necessary.
• Alarm mode: Above the predefined thresholds the LED will turn red non-stop, meaning
immediate service action is required
Refer to section Service intervals for more information on service intervals.
Instruction book
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