Flange seal Prädifa series NHE, FlexiSeal® | Product Series

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Inside Diameter (mm)

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Maximum Working Temperature (C)

Seal Material

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Flange seal Prädifa series NHE, FlexiSeal® Flange seal Prädifa series NHE, FlexiSeal®

Flange seal Prädifa series NHE, FlexiSeal®

Where to Buy

Flange seal. External pressure. Static and intermittently dynamic. FlexiSeal. Spring-energized PTFE seal. High-pressure.

Technical Specifications

  • Media: Hydraulic
  • Polymer Material Options: Polytetrafluoroethylene (PTFE, mPTFE, TFM, Polon®)
  • Maximum Operating Pressure: 1400 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: Extremely High Pressure (> 500 bar)
  • Operating Pressure: External Pressure
  • Outside Diameter: 51 to 193 mm
  • Inside Diameter: 35 to 177 mm
Safety Warning

Full Product Description

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

• Extended heel reduces the effects of extrusion.
• Helical spring for high load and small deflection range.
• Resilient helical spring resists permanent set and maintains compliance to long-term flange separation.
• Many high-resilience energizer options available, including choice of light, medium and heavy loads and NACE for oil field use.
• Low-cost elastomeric energizers available, all with excellent fatigue resistance.

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

Related Documents

Literature and Reference Materials
PTFE Seals Design Guide--PTD3354
FlexiSeal®--NHE external high-pressure u2013 static, intermittently dynamic--PTD3354
Installation Guidelines for FlexiSeals®--PTD3354
Storage and Cleaning of Elastomer Seals--PTD3032
Product Demos & Tutorials
Mixing the right ingredients: Material Development at Parker-Prädifa
Parker Final Exam in Physics / Sealing Systems Put to the Test
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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
NHE-M003500-03-063-2 44 35 2.26 2.26 -190 230 Polytetrafluorethylene additives
NHE-M007000-02-009-2 79 70 2.26 2.26 -190 230 Polytetrafluorethylene additives
NHE-M011000-05-002-1 132.6 110 6.05 6.05 -190 230 Polytetrafluorethylene additives
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