GN 556 Breather Caps with Two Functions

Screw in lower part using an Allen® wrench.

Insert filter.

Place upper part on top. The knobs on the upper part and the appropriate recesses in the lower part serve to assemble the unit in the proper and accurate position.

Ventilation / breather position:
Turn upper part clockwise (CLOSE arrow) up to the first latch position. Marker 1 is located above the reference pointer. The latching mechanisms prevents the upper part from inadvertently working loose.

Close position:
Continue to turn the upper part clockwise (CLOSE arrow) until marker 0 is located above the reference pointer. The latching mechanism prevents the upper part from working loose also in this position.

To return to the ventilation / breathing position or for changing the filter of for dismantling, turn the upper part anti-clockwise as shown by the OPEN arrow.

Air flow rate [l/min.] is a factor of the pressure
difference [l/min.] between container and ambient air.