This item incorporates a humidity indicator and a two-way breather valve all in the same housing, thereby saving the cost of an additional hole in the case. The valve has separate and distinct settings for both pressure and vacuum relief.
There is a separate path to the Humidity Indicator. The breather valve is lightweight, rugged, tamper-proof and requires no field maintenance. Corrosion-resistant materials are used throughout. The valve seal is made of silicone rubber. A manual release push button is standard on all breather valves. It is used to equalize residual pressure or vacuum differentials in order to make opening the container easier. A gasket, washer and hex nut are provided with each valve.