Model Number：Thickness 2x78/80/82/84/85/88/90/92/95/100 mm
Material：Silicon
Brand Name：NoEnName-Null
Certification：RoHS
Origin：Mainland China
O-ring Sealing Principles
O-rings are bi-directional seals circular in shape and cross section. O-rings are generally made of an elastomeric material but may be made of other materials such as PTFE or metal. An O-ring seals through the deformation of the seal material by installation and media pressure to close off the gap between mating components. Higher system pressures can cause deformation through the gap known as extrusion resulting in seal failure. Choosing a harder seal material or installing back-up rings to support the O-ring may alleviate this problem.
Method of operation
O-Rings are double-acting sealingelements. The inital squeezewhich acts in aradialora xial direction depending on the installation gives the O-Ring its initial sealing capability.These forces are superimposed by the system pressure to create the total sealing force which increases as the systeme pressure increases (Figure 2). Under pressure the O-Ring behaves in asimilar way to a fluid with high surface tension. The pressure is transmitted uniformly to all directions.
VMQ (Silicone Ring):
It has good electrical insulation properties. Tensile strength is worse than the general rubber and not oil-resistant silicone temperature-resistant range temperature:-43-210℃ the most outstanding advantage is that it has excellent high temperature resistance anti-static properties.
Application
The O-Ring is used predominantly for static sealing applications: - As aradial static seal e.g. for bushings covers pipes cylinders - As an axial static seal e.g. for flanges plates caps. O-Rings in dynamic applications are recommended only for moderate service conditions.They are limited by the speed and the pressure against which they are to seal: - Forlow duty sealing of reciprocatingpistons rods plungers etc. - For sealing of slowlypivotingr otating or spiral movements on shafts spindlesrotary transmission leadthroughs etc.
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