The butterfly disc is constructed flat, with reinforcing ribs and is supported on two semi shafts. The flat disc system is sufficiently rigid for the  operational pressures of these valves and it does not have significant losses.

The butterflies have two types of seal design which depends on its application: swing (closure from 90 to 97%) for environments with dust concentrations (less than 1000 mg/Nm3); and the tight seat (closure of 99%) suitable for other applications requiring a high level of air tightness.

We can also supply the additional bearings situated on the outside and separated from the packing. So that they are kept away from sources of heat and corrosion, thus lengthening their useful life. This system also allows for the changing of the packing without having to remove the bearing, which will make future maintenance tasks easier.