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When the differential pressure between the inlet and outlet sides exceeds 0.05 MPa, the red part of the indicator will gradually rise.
When the red part of the indicator reaches the top of the display, the differential pressure is approximately 0.1 MPa.
The element service indicator is not a consumable item and does not need to be replaced.
Once you replace the element, and it is no longer clogged, the red part of the indicator will go down again.
Note) Even if the red part of the element service indicator does not reach the top of the display, it is recommended to replace the element after 2 years of use.