The wide range of options for knife gate valves include Manual Override, Fail Safe System to operate a pneumatic valve during air failure, stem protection bellows, positioners for control & throttling applications and a whole lot of other specials. All accessories come from reputed manufacturers and carry comprehensive guarantee for the complete assembly from VAAS.

These are square or rectangular ported to handle powders or dry solids. They are designed to function at low pressures and seat leakage test is also not conducted. These are custom made and VAAS can supply them in various sizes and materials of construction. Some applications such as hopper or chute isolation call for such designs.

These knife gate valves are used in thermal power plants to isolate the coal mill from the boiler during shutdown and are designed to withstand abrasive wear from high velocity coal-air mixture during normal operation. They come with full port seats that are suitably hard faced to meet the required service conditions. In larger sizes the seats are replaceable and rotatable and to get additional service life.