Valve arrangement
A valve arrangement has an annular housing with valve seat and a two-part valve plate that is rotatable about an axis. The seat is in the form of a disk including two adjacent openings with a web between and the axis is parallel to the web. The two parts of the valve plate are next to each other with their planes parallel and offset in a perpendicular direction. They are connected to each other through one of the openings by a connection piece extending through the one opening. In a closed position for the valve, the valve plate part are respectively positioned on opposite sides of the valve seat and cover and seal the respective openings due to a seal that is between the valve plate parts and the valve seat.
1. A valve arrangement for pipe lines or containers, comprising: an annular housing part ( 11 , 11 ′) encompassing a line cross section having a parting plane; a valve plate ( 12 , 12 ′) having at least one shaft part ( 13 , 13 ′) supported on the housing part ( 11 ) on both sides of the valve plate and being rotatable about a rotational axis ( 10 ) that is transverse to the housing part between an open and a closed position; a valve seat ( 17 ) on the housing part ( 11 , 11 ′); a seal ( 15 , 16 ) between the valve seat ( 17 ) and the valve plate ( 12 , 12 ′) for forming a sealing between the valve seat and the valve plate in the closed position; the valve seat ( 17 ) comprising a disk disposed within and transversely across the housing part in the parting plane, the valve seat disk ( 17 ) including two adjacent openings ( 20 , 21 ) with a web between the openings, the rotational axis ( 10 ) being disposed parallel to the web; the valve plate ( 12 , 12 ′) comprising a two-part plate having first and second valve plate parts ( 12 , 12 ′) disposed next to one another, the valve plate parts lying in parallel planes with respect to one another that are offset from each other in a direction perpendicularly to the parallel planes, the first valve plate part ( 12 ) being fixedly connected to the second valve plate part ( 12 ′) by connection means ( 14 ) for connecting the valve plate parts to each other through one of the openings ( 20 , 21 ) such that in the closed position the first valve plate part ( 12 ) is positioned on one side of the valve seat disk ( 17 ) to cover one of the openings ( 20 ) and the second valve plate ( 12 ′) is positioned on an opposite side of the valve seat disk ( 17 ) to cover the other opening ( 21 ); the seal comprising two seals ( 15 , 16 ), one seal extending around the one opening ( 20 ) and the other seal extending around the other opening ( 21 ), the seals being between the valve seat disk ( 17 ) and the respective valve plate parts ( 12 , 12 ′) on both sides of the valve seat disk ( 17 ) for sealing the two openings in the closed position.
2. A valve arrangement as claimed in claim 1 , wherein at least one of the seals ( 15 , 16 ) is disposed on the valve plates ( 12 , 12 ′).
3. A valve arrangement as claimed in claim 1 , wherein at least one of the seals ( 15 , 16 ) is disposed on the opposite sides of the valve seat disk ( 17 ).
4. A valve arrangement as claimed in claim 3 , wherein both of the seals ( 15 , 16 ) are disposed on the valve seat disk ( 17 ).
5. A valve arrangement as claimed in claim 1 , including a groove in at least one of the valve seat disk ( 17 ), the first valve plates part ( 12 ), and the second valve plate part ( 12 ′), for receiving at least one of the seals ( 15 , 16 ), the groove following a contour of the respective opening ( 20 , 21 ), and the respective valve plate ( 12 , 12 ′) in the closed position is in contact on the respective seal ( 15 , 16 ) for sealing the respective opening.
6. A valve arrangement as claimed in claim 1 , wherein the seals ( 15 , 16 ) are elastomer seals.
7. A valve arrangement as claimed in claim 1 , wherein the seals ( 15 , 16 ) are elastomer O-ring seals.
8. A valve arrangement as claimed in claim 1 , wherein one of the two openings ( 2 , 21 ) has a greater cross section than the other opening.
9. A valve arrangement as claimed in claim 1 , wherein an opening cross section of both openings ( 20 , 21 ) is at least 45% of the line cross section.
10. A valve arrangement as claimed in claim 1 , wherein an opening cross section of both openings ( 20 , 21 ) is at least 60% of the line cross section.
11. A valve arrangement as claimed in claim 1 , wherein the openings ( 20 , 21 ) each have a shape that in an outer region follows a round contour of the housing part ( 11 ) and in a region between the openings, forms a straight-line along the web.
12. A valve arrangement as claimed in claim 1 , wherein the valve arrangement is a vacuum valve.