We have implemented the ATEX-certified Non-Return Valves Series by including the NRV COMBO model in our production.
These valves, like the SNR already present in the catalog, are not suitable for metal dusts but certainly have greater performance:
first of all, the possibility of being installed in a duct with a bend (only one) between the filter and the valve.

Please see below the main features: Differences SNR-NRV COMBO-ENG