Flange seal Prädifa series NAI, FlexiSeal® | Parker NA
687424
687424

Flange seal Prädifa series NAI, FlexiSeal®

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

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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.
Description

Performance Characteristics

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

FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF THE PRODUCTS DESCRIBED HEREIN OR RELATED ITEMS CAN CAUSE DEATH, PERSONAL INJURY AND PROPERTY DAMAGE. This document and other information from Parker-Hannifin Corporation, its subsidiaries and authorized distributors provide product or system options for further investigation by users having technical expertise. The user, through its own analysis and testing, is solely responsible for making the final selection of the system and components and assuring that all performance, endurance, maintenance, safety and warning requirements of the application are met. The user must analyze all aspects of the application, follow applicable industry standards, and follow the information concerning the product in the current product catalog and in any other materials provided from Parker or its subsidiaries or authorized distributors. To the extent that Parker or its subsidiaries or authorized distributors provide component or system options based upon data or specifications provided by the user, the user is responsible for determining that such data and specifications are suitable and sufficient for all applications and reasonably foreseeable uses of the components or systems...

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