Use of O-rings
O-rings are widely used in various joints of hydraulic and pneumatic pipe joints, cylindrical faces and flange faces. For the O-ring used during the movement, when the working pressure is greater than 9.8Mpa, if the pressure is unidirectional, a retaining ring is set on the other side of the O-ring in the direction of pressure; Place a retaining ring on each side of the ring. To reduce friction, wedge-shaped retaining rings can also be used. When the pressure fluid is applied from the left, the right retaining ring is pushed up, and the left retaining ring does not contact the surface to be sealed, so the friction force is reduced. In general, the use of a retaining ring will increase the friction of the sealing device, and a wedge-shaped retaining ring is of great significance to reduce this friction. For fixed O-rings, when the working pressure is greater than 32Mpa, a retaining ring is also required.