IDF Union (International Dairy Federation)
The IDF Union is comprised of nut, male part, a liner, and a gasket.
The male part and liner that comes in contact with the product come in SS 304 and SS 316L while the round nut is SS 304.
The gaskets comes in Teflon, BUNA, EPDM, Silicone, and Viton.
The easiest way to identify an IDF Union is its T Shape Gasket.