Motivation For years, IMI-Flow Design has provided valves with end connections customized for the job at hand.  When field disconnection is desired this means our carefully designed o-ring unions with their superior o-ring retention, but on system connections for an isolation valve a more permanent and tamper-proof system is required. The dual seal end-piece design is a permanent

What? Many products from IMI-Flow Design have an integrated ball valve for isolating the terminal.  Under the handle of these ball valves there’s a nut.  This is called the “packing nut”.   Concealed under the packing nut is… wait for it… packing.  Specifically, there’s a piece of PTFE which is squeezed by the nut to