Types of Rubber Seal Rings

In general, the main function of seal rings is to prevent oil, water and spoilage and thus to seal gas. Simply put, this is used to prevent leakage.

Although the functions are generally similar, different seal rings still have their specific functions. O-rings are mainly applied to static seals and alternating seals. When used in an orbiting seal, it can only be used on low speed equipment. As for the V-ring, grooves are often installed in the outer circle or inner circle.

U-ring – This ring’s section is U-shape. So it is called U-ring. It can be separated into two kinds, namely rubber type and wrapped type. Generally speaking, the wrapped type is usually combined with a rubber supporting ring. This seal ring is mainly used in the cylinder rod of a fluid cylinder and its medium is liquid oil, water and emulsible oil. Because the coated fabric has the good surface structure and can keep the ideal lubrication when the mental slides, this ring is of great help to reduce the friction and improve the service performance. As for the pure rubber U-ring, its working condition is similar to the Y-ring.

Y-ring – As a kind of rubber seal ring s used in the alternating motion, Y-rubber seal ring’s section is Y shape. So it is called Y-ring for short. In normal situation, it is applied in the operating system for the fluid pressure or gas pressure. It is very simple in structure and the effectiveness of seal is quite good. Its applicable working pressure and temperature are separately 16MPa and -30~120 Celsius temperature.

V-ring – It is used in the alternating motion. Its section is V-shape. It is seldom used alone. In normal situation, it is often combined with plunger ring, supporting ring and several V-seal rings. The numbers of this ring depend on the sealing pressure. The V-seal ring is molded by the rubber fabric or pure rubber mold. Nitrile -butadiene rubber is often used as the sizing material. As for the chuck ring and supporting ring, they are often pressed by the hard rubber fabric or plastics. It is said that this combination is mainly applied in the following equipments, such as plunger or piston of the heavy equipment. Meanwhile, because this combination is characterized by the good stability and abrasive resistance and it also can prevent the seal ring into the gap, it is the best seal tool even though the working condition is very harsh. What’s more, this ring is applicable for the medium, such as hydraulic oil, water and emulsified liquid. The suitable pressure and temperature are separately 40 MPa and -30~120 Celsius temperature.