How to choose an economical rubber diaphragm

The O-ring is a circular rubber sealing ring with a circular cross-section. Because its cross-section is O-shaped, it is called an O-ring. It is mainly used for mechanical parts to prevent leakage of liquid and gaseous media under static conditions. In some cases, O-rings can also be used as dynamic sealing elements for axial reciprocating motion and low-speed rotary motion. Different materials are selected to suit it, which is widely used in hydraulic and pneumatic transmission systems.
O-rings are usually selected as large-section o-rings as much as possible. Under the same gap, the volume of the o-rings squeezed into the gap should be smaller than the maximum allowable value for the o-rings to be squeezed into.
For different types of fixed sealing or dynamic sealing applications, O-rings provide designers with an effective and economical sealing element. The o-ring is a double acting sealing element. The initial compression in radial or axial aspects upon installation, imparts the initial sealing capability of the o-ring itself. The sealing force generated by the system pressure and the initial sealing force are combined into the total sealing force, which increases with the increase of the system pressure. O-rings play a prominent role in static sealing applications. However, o-rings are also often used in dynamic appropriate applications, but are limited by the speed and pressure at the seal.