Flange seal Prädifa series V2 | Product Series

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Outside Diameter (mm)

Inside Diameter (mm)

Element Height (mm)

Groove Width

Minimum Working Temperature (C)

Maximum Working Temperature (C)

Seal Material

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Flange seal Prädifa series V2 Flange seal Prädifa series V2

Flange seal Prädifa series V2

Where to Buy

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

Technical Specifications

  • 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
Safety Warning

Full Product 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

Related Documents

Literature and Reference Materials
Storage and Cleaning of Elastomer Seals--PTD3032
Product Demos & Tutorials
How to Properly Store and Clean Elastomer Seals
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
V20365N3544 9.5 3.5 1.9 3 -25 100 N3544
V20365N3589 9.5 3.5 1.9 3 -20 100 N3589
V20409N3589 7.9 4 1.3 1.950 -20 100 N3589
V20612N3544 12 6 1.9 3 -25 100 N3544
V20612N3589 12 6 1.9 3 -20 100 N3589
V20612V3664 12 6 1.9 3 -20 200 V3664
V20712N3544 12 7 1.3 2.5 -25 100 N3544
V20814N3544 14 8 1.9 3 -25 100 N3544
V20814N3589 14 8 1.9 3 -20 100 N3589
V20814V3664 14 8 1.9 3 -20 200 V3664
V21016N3544 16 10 1.9 3 -25 100 N3544
V21016N3589 16 10 1.9 3 -20 100 N3589
V21016V3664 16 10 1.9 3 -20 200 V3664
V21019N3544 19 10 2.4 4.5 -25 100 N3544
V21218N3544 18 12 1.9 3 -25 100 N3544
V21218V3664 18 12 1.9 3 -20 200 V3664
V21421N3544 21 14 1.9 3.5 -25 100 N3544
V21625N3544 23 16 2.5 3.5 -25 100 N3544
V21724N3544 24 17 1.9 3.5 -25 100 N3544
V22027N3544 27 20 1.9 3.5 -25 100 N3544
V22432N3544 32 24 2.4 4 -25 100 N3544
V22533N3544 33 25 2.4 4 -25 100 N3544
V23240N3544 40 32 2.4 4 -25 100 N3544
V24048N3544 48 40 2.4 4 -25 100 N3544
V24552N3544 52 45 1.9 3.5 -25 100 N3544
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