A ball valve according to the invention has a disc (8) with a shaped opening (4) adjacent to the ball (3) such that the flow characteristics through the ball valve may be modified.
申请公布号
WO9961823(A1)
申请公布日期
1999.12.02
申请号
WO1999US09138
申请日期
1999.04.28
申请人
BELIMO AIR CONTROL (USA) INC.;CARLSON, BENGT, A.;BUCK, WERNER, A.
