Flange seal Prädifa series V2 | Parker NA
687424
687424

Flange seal Prädifa series V2

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Flange seal. Mainly for subplates and flanges of control units and valves.

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Description
    The V2 flange seal made of rubber elastomer compounds was developed as an alternative to conventionally used O-ring/back-up ring combinations for static sealing at higher pressures. The robust seal geometry and use of particularly extrusion-resistant Parker rubber compounds facilitates installation and enhances sealing performance in pulsating pressure conditions, resulting in significantly longer service life. Due to the interference fit, the geometric design of the flange seal prevents the otherwise frequent occurrence of O-ring “pumping.”

    Leakage which has been observed when O-rings are used can be attributed to a pressure buildup on the outer diameter which occurs with pressure surges and pressure fluctuations, frequently causing O-rings to be pulled out of their seats and being carried off by the fluid flow. This profile and the recommended groove prevent this effect. A radial movement and the wear it entails, which may occur with O-rings, is avoided by the special shape of the V2 seal.

    • Enhanced sealing performance in non-pressurized conditions.
    • Easy installation due to integrated static sealing function.
    • Excellent media resistance in case of suitable compound selection.
    • Suitable compounds available for special requirements of the chemical process industry.
    • Suitable compounds available for special requirements of the food processing industry.
    • Installation in open housings.
    • Seal geometry prevents pressure build-up on low-pressure side in case of pressure peaks.
    • Interference fit on the outer diameter enables overhead installation.

    Range of application:
    Mainly for sealing oil ports in modular valves
Description

Performance Characteristics

Thermal Application Type

Low Temperature (< -35°C)
Standard Moderate Temperature (-35 to 100°C)

Media

Hydraulic

Polymer Material Options

Nitrile Butadiene Rubber (NBR, XNBR)
Fluorocarbon Rubber (FKM, FPM)
Thermoplastic Polyurethane (TPU, Resilon®, Ultrathan®)

Maximum Operating Pressure

315 bar
500 bar

Minimum Operating Temperature

-50 to -20 °C

Maximum Operating Temperature

80 to 200 °C

Maximum Surface Speed

0 m/sec

Unit of Measure

Length: mm

Cushioning Mechanism

No

Pressure Rating

High Pressure (< 500 bar)

Operating Pressure

Internal Pressure

Outside Diameter

7.9 to 55 mm

Inside Diameter

3.5 to 45 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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