May 10, 2012
ASME B16.5 Flanged or Butt-Welding Ends,
Plug Type Disk, Straight Pattern, Bolted Bonnet,
Integral Body Seat or Separate Seat Ring (Screwed or Welded In),
Outside Screw and Yoke, Rising Stem,
Rising Handwheel, Gearbox, or Power Actuator Operated,
Complete with a Machined Conical Backseat in...