Flange seal Prädifa series NRI, FlexiSeal® | Product Series

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Flange seal Prädifa series NRI, FlexiSeal® Flange seal Prädifa series NRI, FlexiSeal®

Flange seal Prädifa series NRI, FlexiSeal®

Flange seal. Internal pressure. Static and intermittently dynamic. FlexiSeal. Spring-energized PTFE seal. Low assembly force.

Technical Specifications

  • Thermal Application Type: Low Temperature (< -35°C), Expanded Low and High Temperature (< -35 to 140°C)
  • Media: Hydraulic
  • Polymer Material Options: Polytetrafluoroethylene (PTFE, mPTFE, TFM, Polon®), Ultra-High Molecular Weight Polyethylene (UHMW-PE)
  • Maximum Operating Pressure: 350 bar
  • Minimum Operating Temperature: -200 to -190 °C
  • Maximum Operating Temperature: 80 to 230 °C
  • Maximum Surface Speed: 0.005 m/sec
  • Unit of Measure: Length: mm
  • Cushioning Mechanism: No
  • Pressure Rating: High Pressure (< 500 bar)
  • Operating Pressure: Internal Pressure
  • Outside Diameter: 126 to 1058 mm
  • Inside Diameter: 108 to 1031 mm
Safety Warning

Full Product Description

The NRI product series features a FlexiSeal® design with a cantilever spring and is ideally suited for flange sealing in medium-pressure applications. It seals the pressure gradient from inside to outside. The NRI series is characterized by extremely high temperature resistance and chemical resistance.

• Wiper-type lips.
• Cantilever spring with high-load/high-compliance to resist permanent set and long-term flange separation.
• Rigid spring acts as a control band to resist low-temperature shrinkage.
• Available in large cross sections, ideal for large-diameter seals.
• NACE-approved energizers available for oil field use.

Range of application:
Flange sealing in medium-pressure applications, pressure gradient from inside to outside. Cryogenic applications.

Related Documents

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Products Outside Diameter (mm) Inside Diameter (mm) Element Height (mm) Groove Width Minimum Working Temperature (C) Maximum Working Temperature (C) Seal Material
NRI-M062000-06-009-4 620 593 9.53 13.5 -190 230 009

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