2 piece design Cast aluminum body along with corresponding elbows and flanges at ends Hard anodized body provides long life Main seal is O-ring Other seal is dust seal End flanges are either TTMA or ANSI 150# ...
3 piece design Main seal can be replaced without dismantling the whole assembly Main seal is gasket Secondary and back- up seals are O-rings Other seal is dust seal Improved load bearing capacity and long leak-proof life ...