The Figure 990 butterfly valve has a split, wafer type body and features a one piece disc stem and field replaceable seat. The range of available materials makes the valve suitable for a wide variety of applications.
The valve is factory tested at full rating, which helps ensure bubble tight shut-off. There is a standardized actuator flange for easy operator interchangeability and mount direct to keystone range of actuators. There is a one-piece wafer-thin disc-stem, which provides high strength and absolutely positive disc control and gives the very minimum obstruction to flow. Its crevice free surface makes it ideal for hygienic duty. The primary seal formed by the seat/shaft/hub contact exceeds the pressure rating of the valve and the body is totally isolated from the flowing medium. The secondary shaft seal is suitable for pressure and vacuum is self-adjusting. A patented dove-tail seat requires no bonding, which makes seat replacement simple and fast.