Circular airtight control valve according to DIN EN 1751-4 with manual quadrant and silicone sealing.
Channeling system with EPDM sealing, airthightness until class D to EN12237. Enclosure airthight to EN 1751 class C. The airthightness class is also determined by the mounting on the construction site.
Explanation :
AKH = Type of valve
250 = Diameter of valve