O-ring for designers to design a variety of static or dynamic application provides a cost-effective sealing element.

Inexpensive production methods and ease of use, making the application of the O-ring to become the most widely sealing element.

Since both for standard applications or for special applications, synthetic rubber, have a very wide range of options, therefore, O-ring seal can actually be applied to all liquid seal.

O-ring vulcanization molding in a mold, characterized in that the circular shape, and an annular cross section. The size of the O-ring from the inner cross-sectional diameter of d1 and d2 are defined (Figure 1).

Sizes to choose from are: cross-sectional diameter of about 0.35 ~ 40mm, diameter up to 5,000 mm and above.

For O-ring design recommendations (see O-ring samples) for the retaining ring is also generally effective, for example, trench structure, surface finish, the introduction chamfer.

When pressure is applied from one side only when the O-ring on the downstream side of the installation a snap ring is enough, when the seal to withstand the pressure from two directions, you must use two ring (O-shaped ring each side with one).

Explanation

In the current design of the hydraulic cylinder, O-ring or O-ring / ring combination is mainly used as static seals, however, this sealing solutions in the assembly there is a certain risk, because O-ring may twisted ring position

There may not be optimal. This solution, the pressure pulsation and the case of dirt intrusion exhibit disadvantages.

In this case, the dumbbell-shaped seal member as a single element static hydraulic seals, can be used as an ideal replacement.