The valves are available in sizes DN50 - DN2200 (2“ - 88“) and pressure classes PN10 - PN250 (Class 150 - Class 1500).¹ TRI-CON valves offer the widest laminated seal ring in the market today, made possible by true cone-in-cone seating design. This wide lamination of stainless steel and graphite provides a flexible sealing surface when it is seated against line scale or particulates. The multiple layer lamination enables a maximum sealing performance.²

Zwick’s TRI-CON valve is characterized by a self-centering disc that is keyed to the shaft, not pinned. Other triple-offset valve manufacturers permanently pin or affix their discs to the shaft.To accommodate for differential thermal expansion of the shaft and the disc, other manufacturers must rely on a s ...