Pratt Knife Gate and Slide Gate valves have been produced since 1995.  Pratt specializes in custom knife gate valves from 2″ to 96″ and above, utilizing carbon steel to stainless steels and other weldable alloys.  With many years of combined experience in building knife gate valves in particular, every facet of the fabrication process from engineering to fabrication is done in their Woodland, WA facility.


Along with custom fabricated valves, Pratt resilient and metal seat cast knife gate valves from 2″ to 24″ in ductile iron or stainless steel.

Pratt Knife Gate valves can be manufactured to meet the “American Iron & Steel” (also known as AIS) requirement for the “Consolidated Appropriations Act of 2014.”

For more information on how we can help you, contact us at Duncan Company!