Flange seal Prädifa series NAI, FlexiSeal® | Product Series

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Flange seal Prädifa series NAI, FlexiSeal® Flange seal Prädifa series NAI, FlexiSeal®

Flange seal Prädifa series NAI, FlexiSeal®

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

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: 550 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: Extremely High Pressure (> 500 bar)
  • Operating Pressure: Internal Pressure
  • Outside Diameter: 8 to 691 mm
  • Inside Diameter: 3.2 to 662 mm
Safety Warning

Full Product Description

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

• 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 high-pressure applications, pressure gradient from inside to outside.

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
NAI-M001450-01-009-1 14.5 9.7 1.45 2.4 -190 230 Polytetrafluorethylene additives
NAI-M001900-02-001-2 19 11.8 2.3 3.6 -190 230 Polytetrafluorethylene virgin
NAI-M002200-02-020-2 22 14.8 2.3 3.6 -190 230 Polytetrafluorethylene 20% glass fiber
NAI-M002210-02-005-2 22.1 14.9 2.3 3.6 -190 230 Polytetrafluorethylene 10% Ekonol
NAI-M002500-01-022-1 25 20.2 1.45 2.4 -190 230 Polytetrafluorethylene 15% glass fiber
NAI-M003000-01-022-1 30 25.2 1.45 2.4 -190 230 Polytetrafluorethylene 15% glass fiber
NAI-M003000-02-020-2 30 22.8 2.3 3.6 -190 230 Polytetrafluorethylene 20% glass fiber
NAI-M003278-01-005-2 32.78 27.98 1.45 2.4 -190 230 Polytetrafluorethylene 10% Ekonol
NAI-M004850-01-011-1 48.5 43.7 1.45 2.4 -190 230 Polytetrafluorethylene additives
NAI-M005000-03-022-1 50 40.4 3.1 4.8 -190 230 Polytetrafluorethylene 15% glass fiber
NAI-M005600-02-001-1 56 48.8 2.3 3.6 -190 230 Polytetrafluorethylene virgin
NAI-M005900-01-005-1 59 54.2 1.45 2.4 -190 230 Polytetrafluorethylene 10% Ekonol
NAI-M006000-02-009-1 60 52.8 2.3 3.6 -190 230 Polytetrafluorethylene additives
NAI-M006800-03-022-1 68 58.4 3.1 4.8 -190 230 Polytetrafluorethylene 15% glass fiber
NAI-M007500-03-009-2 75 65.4 3.1 4.8 -190 230 Polytetrafluorethylene additives
NAI-M008200-03-022-1 82 72.4 3.1 4.8 -190 230 Polytetrafluorethylene 15% glass fiber
NAI-M008500-03-002-1 85 75.4 3.1 4.8 -190 230 Polytetrafluorethylene modified
NAI-M009360-03-009-2X 93.6 84 3.1 4.8 -190 230 Polytetrafluorethylene additives
NAI-M009700-03-020-2 97 87.4 3.1 4.8 -190 230 Polytetrafluorethylene 20% glass fiber
NAI-M009956-03-001-2 99.56 89.96 3.1 4.8 -190 230 Polytetrafluorethylene virgin
NAI-M011200-03-001-2 112 102.4 3.1 4.8 -190 230 Polytetrafluorethylene virgin
NAI-M011400-03-009-2X 114 104.4 3.1 4.8 -190 230 Polytetrafluorethylene additives
NAI-M011500-04-009-1 115 100.8 4.65 7.1 -190 230 Polytetrafluorethylene additives
NAI-M011700-03-020-2 117 107.4 3.1 4.8 -190 230 Polytetrafluorethylene 20% glass fiber
NAI-M012200-04-006-1 122 107.8 4.65 7.1 -200 80 Ultra-high molecular weight polyethylene
NAI-M012700-04-001-2 127 112.8 4.65 7.1 -190 230 Polytetrafluorethylene virgin
NAI-M013400-03-005-2 134 124.4 3.1 4.8 -190 230 Polytetrafluorethylene 10% Ekonol
NAI-M014200-03-001-2 142 132.4 3.1 4.8 -190 230 Polytetrafluorethylene virgin
NAI-M017145-05-005-1 171.45 152.45 6.1 9.5 -190 230 Polytetrafluorethylene 10% Ekonol
NAI-M018410-03-001-2 184.1 174.5 3.1 4.8 -190 230 Polytetrafluorethylene virgin
NAI-M018415-04-001-2 184.15 169.95 4.65 7.1 -190 230 Polytetrafluorethylene virgin
NAI-M019050-03-002-2 190.5 180.9 3.1 4.8 -190 230 Polytetrafluorethylene modified
NAI-M024100-04-001-1 241 226.8 4.65 7.1 -190 230 Polytetrafluorethylene virgin
NAI-M038500-06-009-2X 385 356 9.5 14.5 -190 230 Polytetrafluorethylene additives
NAI-M060800-06-005-1 608 579 9.5 14.5 -190 230 Polytetrafluorethylene 10% Ekonol
NAI-M066200-06-005-1 662 633 9.5 14.5 -190 230 Polytetrafluorethylene 10% Ekonol
NAI-M001800-02-009-2 18 10.8 2.3 3.6 -190 230 Polytetrafluorethylene additives
NAI-M005000-03-009-2 50 49.4 3.1 4.8 -190 230 Polytetrafluorethylene additives
NAI-M007500-04-002-1 75 60.8 4.65 7.1 -190 230 Polytetrafluorethylene additives
NAI-M009400-03-009-2 94 84.4 3.1 4.8 -190 230 Polytetrafluorethylene additives
NAI-M010600-03-001-2 106 96.4 3.1 4.8 -190 230 Polytetrafluorethylene virgin
NAI-M013000-03-009-2 130 120.4 3.1 4.8 -190 230 Polytetrafluorethylene additives
NAI-M017700-03-001-2 177 167.4 3.1 4.8 -190 230 Polytetrafluorethylene virgin

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