Fluoroseal Inc is a manufacturer of sleeved and lined industrial plug valves. Double block and bleed valve products offered feature double port seals on both sides and 1/2" standard drain connection in addition to sealed isolation of the chamber below the plug, and the areas around the plug at 90° to the port openings.

Phoenix Precision is a manufacturer of instrumentation valves, including gauge valves, needle valves and instrumentation manifolds. Double block and bleed valves available feature solid bar stock construction and 1/8" or 3/16" bore with needle or ball tip stems.