Our innovative DIAvent® is the ideal pressure management solution intended for large-scale batteries in electric and hybrid vehicles. It is made up of a patented multi-layer nonwoven membrane combined with an umbrella valve. This allows DIAvent® not only to reliably handle the bi-directional pressure equalization but also provides reversible emergency degassing. Thus, DIAvent® combines two functions in one part, suitable even in the harshest operating conditions. A version with a high-performance PTFE breather is also available on request.