Types Of Dynamic Seals

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  • Seal Eccentricity (.pdf)
    The two major elements of eccentricity that should be considered when designing a seal: Shaft-to-Bore Misalignment(STBM) and Dynamic-Runout(DRO).
  • Testing of HFC Fluids on Common Seal Materials in High Temperature Applications
    produces different reactions within the traditional sealing materials used in these applications. The different reactions can range from lower lubricity relative to dynamic sealing elements, to corrosion concerns of supporting metal hardware, to compatibly with sealing polymers. This can shorten seal
  • Dynamic ICP (R) Pressure Sensors for Detection of Combustion Instability and High Intensity Acoustics in Rocket Motor Research
    of the nozzle or another engine component. It is difficult to model in three dimensions during rocket motor design, even with modern computing power, and can be hard to eliminate. Dynamic quartz piezoelectric pressure sensors are available to assist design engineers in studying combustion instability problems
  • Beware Thermal Cycling in BioProcessing Part One
    integrity and reliability over a longer service life. Ball valve seats are also dynamic seals, which function as the valve is cycled open and closed. Most ball valves are designed with floating balls. That is, when the valve is in the closed position, the ball is free to move axially toward the downstream
  • Beware Thermal Cycling in BioProcessing Part One
    and seat and are part of the basic design of the valve. They are dynamic seals and must retain leak-tight performance during and after both mechanical and thermal cycling. Stem seals are intended to prevent leaks into or out of containment. Leaks are driven by pressure and proceed from a high-pressure
  • A System for Rheological Measurements on Samples Above Their Boiling Point
    The air-bearing seal is effectively. frictionless and permits dynamic. oscillatory testing throughout the. frequency range of the. instrument.
  • O-Ring Failure Modes: Extrusion Damage
    Extrusion damage failures often occur in dynamic applications such as hydraulic controlled rod and piston seals. These can also occur in static applications when seals are subjected to high-pressure pulsing, especially when the gland extrusion gaps are excessive.
  • Electronic Enclosures - Closing the Door on Sealing Problems
    Some manufacturers of electronic cabinets use off-the-shelf weatherstripping to seal gaps between the housing and door. Often, these weatherstrip materials are just fillers that form a static seal. They're not meant for dynamic sealing, and demonstrate poor compression set recovery
  • Translating Metric Units to Inches in O-Rings
    O-rings are the most widely-used seals because they are efficient, economical, and can be used in a wide variety of static and dynamic applications. In order to get the most out of an O-ring, it is critical that its dimensions and specifications meet part requirements.
  • O-Ring Lubrication
    In all dynamic applications, proper lubrication and good heat dissipation are essential to long seal life and performance. In pneumatic applications, supplemental lubrication should be provided. Lubricants should be selected on the basis of the material of which the O-Ring is made and the type
  • The Use of the MDR 2000 to Resolve a Problem in Injection Molding
    Converting a high-volume compression-molded bonded seal to an injection-molded process requires dramatically different rheological and curing properties of the elastomer formulation. Shear rates are orders of magnitude higher thus excluding typical rheometer and viscometer data. Compound
  • EVALUATING THE RETENTION OF VISCOELASTIC PROPERTIES FOR EXTREME AND LONG TERM SERVICE: A CASE STUDY IN POTASSIUM FORMATE.
    impact, high density, and its ability to retard corrosion. We. reviewed physical aging using o-ring seals (ASTM D1414) and compressive stress relaxation. Chemical changes within the elastomers were monitored using Fourier Transform Infr. ared Spectroscopy (FTIR) with attenuated total reflectance(ATR