Pipe slide valve spindle seal has bellows seal around spindle
DE10147737A1
Method for sealing gate valve has the valve plate coated with rubber and pressed into the sealing position by wedges in the last phase of the closing action
DE10012600A1
Control valve for pipeline conveying fluids or bulk materials comprises disk mounted in tubular housing which can be rotated between open and closed position by shaft operated by spindle in protective sleeve which supports its upper end
DE10012598A1
Control valve for pipeline conveying fluids or bulk materials comprises rotating disk mounted in tubular housing which carries wedge-shaped components which cooperate with sloping sections of disk seating to open valve
