Description

• O-ring Sealing Principles O-rings are bi-directional seals, circular in form and move section O-rings are commonly made from an elastomeric material, but could also be fabricated from different supplies resembling PTFE or steel An O-ring seals through the deformation of the seal materials by set up and media strain to shut off the gap between mating elements Higher method pressures can cause deformation through the gap, known as extrusion, resulting in seal failure Choosing a more durable seal materials or installing back-up rings to assist the O-ring could alleviate this concern Method of operation O-Rings are double-acting sealingelements The inital squeeze,which acts in aradialora xial course counting on the installation, presents the O-Ring its initial sealing means forces are superimposed by means of the components pressure to create the complete sealing force which will increase as the systeme pressure increases (Figure 2) Under pressure, the O-Ring behaves in asimilar approach to a fluid with excessive floor stress The pressure is transmitted uniformly to all directions VMQ (Silicone Ring): It has nice electric insulation properties Tensile power is worse than the general rubber and not oil-resistant, silicone temperature-resistant range temperature:-43~210℃, essentially the most outstanding virtue is that it has splendid hot temperature resistance, anti-static houses Application The O-Ring is used predominantly for static sealing applications: - As aradial static seal, e for bushings, covers, pipes, cylinders - As an axial static seal, e for flanges, plates, caps O-Rings in dynamic functions are commended only for average carrier situations are restricted by the speed and the strain against which they're to seal: - Forlow responsibility sealing of reciprocatingpistons, rods, plungers, and so forth - For sealing of slowlypivoting,r otating or spiral movements on shafts, spindles,rotary transmission leadthroughs, and many others

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