The KGC-MD valves are available in 3 in. to 24 in. (80-600 mm) sizes with metal or dual metal and resilient seats. To withstand highly abrasive media, the valves are available with a replaceable hardened seat, hardened gate, full 100% port opening, high performance packing system with wire scraper rings, and heavy-duty superstructure. All of these features combine to provide a longer service life, less downtime, and less maintenance than other valves designed for these tough applications.
More information is available online.
TAPPI
http://www.tappi.org/