Flange seal Prädifa series NLF, FlexiSeal® | Product Series

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Inside Diameter (mm)

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Flange seal Prädifa series NLF, FlexiSeal® Flange seal Prädifa series NLF, FlexiSeal®

Flange seal Prädifa series NLF, FlexiSeal®

Where to Buy

Flange seal. Internal pressure. Static and dynamic. FlexiSeal. Spring-energized PTFE seal. Low assembly force. High deflection range permissible.

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: 5 m/sec
  • Unit of Measure: Length: mm
  • Cushioning Mechanism: No
  • Thermal Application Type: Expanded Low and High Temperature (< -35 to 140°C)
  • Pressure Rating: Medium Pressure (< 250 bar)
  • Operating Pressure: Internal Pressure
  • Outside Diameter: 17.5 to 139 mm
  • Inside Diameter: 12.7 to 120 mm
Safety Warning

Full Product Description

The NLF 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. It is the preferred choice for applications in which only limited assembly forces are permissible or which require compensation for larger gaps between sealing areas. It is also suitable for applications with minor movements caused by vibrations. The NLF series is characterized by extremely high temperature resistance and chemical resistance.

• Cantilever spring for low sealing load and high 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.
• Available with silicone filling for food and drug applications.

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

Related Documents

Literature and Reference Materials
PTFE Seals Design Guide--PTD3354
FlexiSeal®--NLF internal pressure u2013 static, dynamic u2013 low load--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
NLF-M001450-01-007-2 14.5 9.7 1.42 1.42 -190 230 Polytetrafluorethylene additives
NLF-M002420-02-001-4 24.2 17.0 2.26 2.26 -190 230 Polytetrafluorethylene
NLF-M002800-03-001-4 28.0 18.4 3.07 3.07 -190 230 Polytetrafluorethylene
NLF-M003000-01-007-2 30.0 25.2 1.42 1.42 -190 230 Polytetrafluorethylene additives
NLF-M003740-03-009-2 37.4 27.799999999999997 3.07 3.07 -190 230 Polytetrafluorethylene additives
NLF-M003850-03-001-2 38.5 28.9 3.07 3.07 -190 230 Polytetrafluorethylene
NLF-M003850-03-012-4 38.5 28.9 3.07 3.07 -190 230 Polytetrafluorethylene additives
NLF-M004200-03-001-4 42.0 32.4 3.07 3.07 -190 230 Polytetrafluorethylene additives
NLF-M004860-03-009-2 48.6 39.0 3.07 3.07 -190 230 Polytetrafluorethylene additives
NLF-M005090-03-009-2 50.9 41.3 3.07 3.07 -190 230 Polytetrafluorethylene additives
NLF-M006570-03-009-2 65.7 56.1 3.07 3.07 -190 230 Polytetrafluorethylene additives
NLF-M007500-02-001-4 75.0 67.8 2.26 2.26 -190 230 Polytetrafluorethylene
NLF-M008030-03-009-2 80.3 70.7 3.07 3.07 -190 230 Polytetrafluorethylene additives
NLF-M008200-02-005-4 82.0 74.8 2.26 2.26 -190 230 Polytetrafluorethylene additives
NLF-M008340-03-009-2 83.4 73.80000000000001 3.07 3.07 -190 230 Polytetrafluorethylene additives
NLF-M011370-04-009-2 113.7 99.5 4.72 4.72 -190 230 Polytetrafluorethylene additives
NLF-M011690-04-009-2 116.9 102.7 4.72 4.72 -190 230 Polytetrafluorethylene additives
NLF-M012565-05-031-4 125.65 106.65 6.05 6.05 -190 230 Polytetrafluorethylene additives
NLF-M013000-05-009-4 130.0 111.0 6.05 6.05 -190 230 Polytetrafluorethylene additives
NLF-M013500-05-005-4 135.0 116.0 6.05 6.05 -190 230 Polytetrafluorethylene additives
NLF-M013500-05-006-4 135.0 116.0 6.05 6.05 -190 230 Polytetrafluorethylene additives
NLF-M016760-04-009-2 167.6 153.4 4.72 4.72 -190 230 Polytetrafluorethylene additives
NLF-M017040-04-009-2 170.4 156.20000000000002 4.72 4.72 -190 230 Polytetrafluorethylene additives
NLF-M021670-04-009-2 216.7 202.5 4.72 4.72 -190 230 Polytetrafluorethylene additives
NLF-M026850-04-009-2 268.5 254.3 4.72 4.72 -190 230 Polytetrafluorethylene additives
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