OsecoElfab’s Fluoropolymer-Booted FRDI Rupture Disc Holder

The OsecoElfab Fluoropolymer-Booted FRDI Insert Rupture Disc Holder is a reduced diameter, flat-faced flange assembly that bolts between standard ANSI pipe flanges and fits within the bolt circle.  The Fluoropolymer-Booted FRDI is used in applications where aggressive corrosives are present. A solid PTFE or PFA insert is pressed into the inner diameter of the holder, ensuring the entire wetted surface of the inlet ring is a solid block of fluoropolymer.  The Fluoropolymer-Booted FRDI has a flat seat, and uses a raised nubbin sealing surface to create a metal-to-metal “bite” seal between the Fluoropolymer-Booted FRDI inlet, and the rupture disk inlet seat surface.  This holder allows the rupture disc to be preassembled to ensure it is properly seated before installation into the pressure systems. Fluoropolymer-Booted FRDI Insert Holders are available in standard ANSI flange ratings up to 8″.

  • The Fluoropolymer-Booted FRDI is for use with the FAS, F(CO) and (F)STD rupture disks.
  • The Fluoropolymer-Booted FRDI is compatible with the AMS, SVT, and LPSF burst disk indicator sensors.
  • The Fluoropolymer-Booted FRDI is available in line sizes ranging from 1 inch diameter all the way up to 8 inches diameter.
  • The Fluoropolymer-Booted FRDI is compatible with service temperatures ranging from cryogenic temperatures all the way up to 500 degrees F.
  • The Fluoropolymer-Booted FRDI is available in all OE standard materials (316 Stainless Steel, Nickel 200, Inconel 600, Monel 400, and Hastelloy C 276).  Other materials may be available or offered on request. The inlet ring material can be specified as a different material than the outlet ring material.
  • The Fluoropolymer-Booted FRDI works well in gas or vapor services, as well as liquid or two-phase services.
  • The Fluoropolymer-Booted FRDI may work well in sticky or fouling services, although alternative holder designs such as the TopHat Assembly are recommended in such environments.
  • The Fluoropolymer-Booted FRDI is considered non-torque sensitive. While proper torque procedures should be followed during installation, the Fluoropolymer-Booted FRDI is fairly tolerant of over-torque, or slightly uneven torque of the bolts on the companion flange.
  • The Fluoropolymer-Booted FRDI is available in ANSI 150#, ANSI 300#, and ANSI 600# Flange Classes.
  • The Fluoropolymer-Booted FRDI is available in Raised Face, Flat Face, Crush Ring, and RTJ flange facing arrangements.
  • The Fluoropolymer-Booted FRDI can be tapped for instrumentation on the outlet ring.
  • Kr values are specific to the rupture disk model used. As such, the Fluoropolymer-Booted FRDI does not have its own, unique Kr value.
  • Operating Ratios are specific to the rupture disk model used. As such, the Fluoropolymer-Booted FRDI does not have its own, unique operating ratio.
  • Manufacturing Ranges are specific to the rupture disk model used. As such, the Fluoropolymer-Booted FRDI does not have its own, unique manufacturing range.
  • Burst Tolerances are specific to the rupture disk model used. As such, the Fluoropolymer-Booted FRDI does not have its own, unique burst tolerance.
  • Fragmentation is specific to the rupture disk model used. As such, the Fluoropolymer-Booted FRDI is neither fragmenting nor non-fragmenting.
  • A 1” Fluoropolymer-Booted FRDI has a standard overall height of 1.62”. Custom height Fluoropolymer-Booted FRDI’s are available upon request.
  • A 1.5” Fluoropolymer-Booted FRDI has a standard overall height of 1.62”. Custom height Fluoropolymer-Booted FRDI’s are available upon request.
  • A 2” Fluoropolymer-Booted FRDI has a standard overall height of 1.62”. Custom height Fluoropolymer-Booted FRDI’s are available upon request.
  • A 3” Fluoropolymer-Booted FRDI has a standard overall height of 1.62”. Custom height Fluoropolymer-Booted FRDI’s are available upon request.
  • A 4” Fluoropolymer-Booted FRDI has a standard overall height of 1.87”. Custom height Fluoropolymer-Booted FRDI’s are available upon request.
  • A 6” Fluoropolymer-Booted FRDI has a standard overall height of 2.50”. Custom height Fluoropolymer-Booted FRDI’s are available upon request.
  • An 8” Fluoropolymer-Booted FRDI has a standard overall height of 2.87”. Custom height Fluoropolymer-Booted FRDI’s are available upon request.