Flanged cast iron latches

Flanged cast iron latches

Valves are used as shut-off devices on pipelines to shut off the working environment, the parameters of which are given in the tables.

ZF-P flange valves consist of the following main parts: a body, a cover, a wedge, two discs, a rod, a seal, a sleeve, a manual control or an electric drive.

The shutter is closed when the control body with the threaded bushing is rotated clockwise (for electrically conductive shutters - the drive shaft of the electric drive with the help of cam bushings rotates the threaded bushing), as a result of which the rod makes a translational movement. When closing, the rod with discs and a wedge between them is lowered. The disk rests against the supporting surface of the bottom of the housing, and the wedge pushes the disks apart and tightly presses the sealing surfaces of the disks to the sealing surfaces of the housing, thereby achieving the density of closing the passage.

The disks move along the guides in the case, a paronite gasket is placed between the cover and the case.

To prevent the passage of the medium between the cover and the rod, a packing is placed in the stuffing box, pressed by the stuffing box 11.

Valves (DN50-DN200) are controlled manually using a manual control device (wheel or handle). To close and at the initial moment of opening the latch, if the effort of one person is not enough, the use of an additional lever is allowed.

Valves (DN200-DN300) are controlled by an electric drive in two modes: electric and manual (see the manual for installation and operation of the electric drive).