CS5mm FKM Rubber O RING OD 41/42/43/44/45/46/48/50/52/55/58/60*5 mm 50PCS O-Ring Fluorine Gasket Oil seal Green ORing | Обустройство

CS5mm FKM Rubber O RING OD 41/42/43/44/45/46/48/50/52/55/58/60*5 mm 50PCS O-Ring Fluorine Gasket Oil seal Green ORing | Обустройство

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 squeeze,which 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.

FKM (Fluorocarbon Rubber):

Depending on structure andf luorine content FKM materialsc an differ withregards to their chemical resistance and cold-flexibility. FKM is known especially for its non-flammability,low gas permeability and excellent resistance to ozone, weathering and aging. The operating temperatures of the Fluorocarbon Rubber range between -20° Cand +200° C(for ashort period of time up to +230° C). Suitable formulated FKM can be used down to -35° C. FKM is also often used with mineral based oils and greases at high temperatures.

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 slowlypivoting,r otating or spiral movements on shafts, spindles,rotary transmission leadthroughs, etc.