The 1350-series differ from all other series. In this series the air inlet valves are executed
with bottom-hinged inner flaps. So the air can only enter from the top side of the air inlet valve. This assures that the air is guided upwards which prevents the air of being guided directly in the direction of the animals. This makes this air inlet valve specifically useful for the pig sector as well as for the minimum ventilation in poultry houses in combination with tunnel ventilation.
Click here for general information about the air inlet valves.