Two/three lever valves are used for the isolation of fluid flow. These valves are ideal for unidirectional shut-off. Lever valves can be mounted with counterweights for emergency shut-off in gas pipelines.
The valve mainly consists of a body, disc, levers, linkages, stuffing boxes, and a drive mechanism. The drive mechanism is coupled with the shaft of the valve and movement of the shaft results in the valve opening /closing operation. Specially designed levers and linkages guide the movement of the disc in such a way that the disc moves parallel to the seat for some distance and then starts to rotate until the valve is completely open. This movement ensures no rubbing of the seal and seat which enhances the life of the seal.
|SIZE RANGE||MAXIMUM OPERATING PRESSURE||MAXIMUM OPERATING TEMPERATURE||TYPE OF SEALING||COONECTION TO PIPELINE||INSTALLATION IN PIPELINE||DRIVE||TESTING|
|- 400 to 3500mm||- Up to 0.5Mpa||- Up to 5000C||
- Metal To Metal
|- Flanged ends||
- Vertical in Horizontal pipeline
- Horizontal in Vertical pipeline
- Body test
- Seat leakage test
- Operational test