US Patent 7198252 Housing flange unit

The present invention is directed to a housing flange unit which includes a housing flange wherein a butterfly valve shaft is rotatably mounted in a perpendicular position in relation to the longitudinal axis of the housing flange and includes a butterfly valve which is arranged in the middle and provided with a first bearing and a second bearing. The butterfly valve shaft includes a circular disk on the outside of the first bearing. The disk engages with a cup-shaped seat of the housing flange. A pot-shaped element with a circular recess is fixed in the cup-shaped seat. The circular disk is embedded in the pot-shaped element. The invention also relates to the use of the housing flange unit as a sealing unit.