In this article, we will discuss the common types of o-ring seals, o-ring material, what is they made, and applications o-ring( how they are used ）

O-ring is a solid rubber seal, annualr seal that is used primarily to block the passage of gases or liquids when squeezed between the two mating surfaces. O-rings are one of the most widely used seal designs in the world. There are countless o-ring size types due to the way they are used, like Metric O-rings, Large diameter O-rings, As-568 O-ring.

Despite the wide range of O-ring seal sizes, each o-ring has the same two structural designs: inner diameter(ID) and Cross Section(CS). To achieve adequate sealing, the cross sectional characteristics are approximately 18-20% to maintain fluids and contaminants.

The wide range ID dimensions of O-rings were developed around standard inch fractional sizes. The size adjustment system is called the AS-568 size standard. There are also standard metric and janpanese size systems. This applies to standard industrial hardware shaft and hole sizes.

Another factor in the O-ring is the cross-sectional dimensions(CS). The cross-sectional design of the o-ring depends on the size of the gland. To ensure proper extrusion for proper sealing, the cross-sectional dimension of the O-ring needs to be greater than the height of the gland.

"Diameter gao" is the gap between two mating hardware surfaces, also known as the squeezing gap.

The extrusion of o-rings mainly concentrated on the extrusion gap and the seal. Depending on whether the application enviroment is static or dynamic. there are differences in the dimensional design

of the o-ring seal cross section. If applied dymanically, a smaller cross section O-ring is required.

As a leading O-Ring Wholesale and manufacturer, melon rubber offers wide range of O-ring seal types, including metric o-ring, large diameter o-rings, filter seal, express seal and firbe washer to meet sealing request.

Melon formulated o-ring compounds could meet the most industry standards,including FDA, LFGB, NSF, WRAS,UL and many customs specification.
Rubber Molding O-ring could be in hardness from 20 to 90 shore A, O-ring materials includes:

>ACM ( Polyacrylate)
good resistance to mineral oil, oxygen and ozone.
>CR (Polychloroprene Rubber)
generally good to chemical resistance, aging, ozone
>NBR(Nitrile Butadiene Rubber)

>EPDM( Ethylene Propylene rubber)

> VMQ（Silicone Rubber）

>FVMQ（Fluorosilicone)