Fig 1003. Green Subs - Black Nut
These unions have a ball seat incorporating a primary âOâ ring seal with a metal secondary seal which assures perfect sealing in misalignment position. Degree of misalignment upto 2â size is 4 and beyond 2â size it is 7 1 /2 . This union is ideally suited for use on high pressure lines. Available in 10000 PSI with end threaded or butt- welded for welding.
Fig 1004. Red Nut - Grey Subs
These union use lip type seal ring end here faces of male and female sub are perfectly square. These are available in 5" & 6" butt weld sizes.