Flange seal Prädifa series NRE, FlexiSeal® | Product Series

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Flange seal Prädifa series NRE, FlexiSeal® Flange seal Prädifa series NRE, FlexiSeal®

Flange seal Prädifa series NRE, FlexiSeal®

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

Technical Specifications

  • Media: Hydraulic
  • Polymer Material Options: Polytetrafluoroethylene (PTFE, mPTFE, TFM, Polon®)
  • Maximum Operating Pressure: 350 bar
  • Minimum Operating Temperature: -190 °C
  • Maximum Operating Temperature: 230 °C
  • Maximum Surface Speed: 0.005 m/sec
  • Unit of Measure: Length: mm
  • Cushioning Mechanism: No
  • Thermal Application Type: Expanded Low and High Temperature (< -35 to 140°C)
  • Pressure Rating: High Pressure (< 500 bar)
  • Operating Pressure: External Pressure
  • Outside Diameter: 240 to 470 mm
  • Inside Diameter: 220 to 450 mm
Safety Warning

Full Product Description

The NRE 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 outside to inside. The NRE 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.
• 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 outside to inside. 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
NRE-M022860-04-006-4 246.6 228.6 4.72 4.72 -190 230 Polytetrafluorethylene additives
NRE-M038100-05-001-4 401 381 6.05 6.05 -190 230 Polytetrafluorethylene

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