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Flange seal Prädifa series OV, Ultrathan®
Product Overview
Tech Specifications
CAD
Product Support
Hydraulic Seals--PTD3350
Compound Data Sheet TPU P5008
Storage and Cleaning of Elastomer Seals--PTD3032
Ultrathan®--Flange seal OV--PTD3350
Mixing the right ingredients: Material Development at Parker-Prädifa
Parker Final Exam in Physics / Sealing Systems Put to the Test
Industry Hydraulics
Description
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The OV flange seal made of polyurethane compounds was developed as an alternative to conventionally used O-ring/back-up ring combinations for static sealing at high pressures. The robust seal geometry and use of particularly extrusion-resistant Parker polyurethane compounds simplifies installation and enhances sealing performance in pulsating pressure conditions, resulting in significantly longer service life. The OV flange seal is particularly suitable for SAE flanges and inferior surface qualities of the flange components. 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 OV seal.
• Enhanced sealing performance in non-pressurized conditions.
• Insensitive to pressure peaks.
• High extrusion resistance.
• 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 closed and undercut housings.
• Design is appropriate for use for overhead installation by tight fit on the outer diamater.
• Further dimensions of machined series with short lead times available.
• Trapped pressure at atmosphere side based on pressure peaks is prevented by the design of flangeseals.
Range of application:
Static seal for SAE flanges.
Description
Performance Characteristics
Maximum Operating Temperature
100 to 110 °C
Media
Hydraulic
Polymer Material Options
Thermoplastic Polyurethane (TPU, Resilon®, Ultrathan®)
Maximum Operating Pressure
600 bar
Minimum Operating Temperature
-35 to -20 °C
Maximum Surface Speed
0 m/sec
Unit of Measure
Length: mm
Cushioning Mechanism
No
Thermal Application Type
Standard Moderate Temperature (-35 to 100°C)
Pressure Rating
Extremely High Pressure (> 500 bar)
Operating Pressure
Internal Pressure
Outside Diameter
25.4 to 287.4 mm
Inside Diameter
17 to 273 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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