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V1238-95 Extrusion Resistant Fluorocarbon

V1238-95 Extrusion Resistant Fluorocarbon

V1238-95 fluorocarbon offers extrusion resistance and premier sealing performance in high-pressure, high-temperature environments

Compound V1238-95 was developed to satisfy customers who experience difficult high-pressure, hightemperature extrusion problems. Typically, an extrusion resistant compound will usually have inferior physical properties and chemical resistance as well as unfavorable compression set resistance. V1238-95 however, has a unique combination of superior physical and chemical properties, excellent compression set resistance, and superior extrusion resistance.

Traditionally, compounding for extrusion resistance has been a function of material hardness. Now, using proprietary compounding technology, we offer a fluorocarbon seal material with all the desirable properties needed in today s tough oilfield applications.

Mechanics of Extrusion:

Extrusion occurs when a gas or liquid under high pressure, forces the seal material into any clearance gap between the sealed surfaces. The larger the diametrical clearance, the more likely extrusion will occur. Elevated temperature and chemical compatibility may also effect potential for seal extrusion. The table below illustrates the general limits for extrusion as a function of pressure, clearance gap and material hardness for standard material formulations. Extrusion is characterized by  nibbling , which is a chewed or chipped appearance on the low pressure side of the seal, or of seam materials actually being forced to flow into the clearance gap.
V1238-95 exhibits more than twice the extrusion resistance of standard 90 durometer materials making it the clear choice for effective sealing in severe environments requiring extreme pressure, temperature and chemical resistance. Recommended operating temperature range for V1238-95 is  15° to +400° F. Typical recommended fluids include petroleum oils, di-ester based and silicate ester based lubricants, silicone fluids and greases, halogenated hydrocarbons, acids, and selected phosphate ester fluids.
Extrusion- Gap Relationships