Packing works in one-sided and two-sided form, which can withstand pressure of 250 to 700 bar. The position of the packings is determined according to the outer and inner edges of the packing. If the outer edges are longer, they are placed in the throat part, and if the inner edges are longer, they are placed in the piston part.
If both the inner and outer edges are symmetrical, use the appropriate piston and throat becomes Some packings are used in rows and others in multiple pieces. In the meantime, layered packing is an example of a ring made of natural rubber. In some cases, a support ring is used next to the packings to increase tolerance.
The benefits of using Oring
All industrial parts that are somehow connected with gases and fluids need good sealing to prevent material from escaping. Various methods are used for sealing, among which welding, soldering and good machining can be mentioned. Another method is done by using flexible and soft material. These materials are trapped between two strong and hard materials and perform the sealing work. Plastic o-rings should be considered as an incompressible fluid with a high viscosity that has a suitable surface tension. If a regular pressure is mechanically applied to the O-ring through the construction of the environment or through hydraulic fluid, this viscous substance will flow inside the gland and prevent fluid penetration. This process causes complete sealing.
Due to the pressure, the rubber material is likely to take on a certain appearance or find some kind of memory state and cause the joints to seal. Note that after proper installation, the o-ring is mechanically pressed into place to prevent fluid from passing through. If this material is under pressure, it will go out of shape and penetrate into the grooves of the gland to make a better seal.
O-ring can withstand pressure up to i5000psi in fixed cylinder and piston systems, which can be fixed or variable. This equipment provides a good seal for all types of cylinder and piston reciprocating systems up to 5000psi pressure. Depending on the ability of the hydraulic fluid to form a protective film, there is a possibility of a small leak. O-rings can also be used in rotating systems, but the rotation speed must be kept low.
For high-quality sealing, this device must be compactly placed between the groove and the cylinder wall. This compression causes the O-ring to have some rotation in its place due to the movement of the piston, but this rotation does not affect its operation under normal conditions. As long as there is good compression between the bottom of the groove and the cylinder wall. , the appearance of the groove is not important and this groove should be able to provide a suitable space for the movement of the O-rings.
Benefits of using packing:
According to the application of packing, they are produced and presented in different sizes and raw materials and different materials. so that the required efficiency in front of environmental factors such as; have pressure, heat, and wear and corrosion. Packings are usually made of natural and synthetic rubber, plastic or different raw materials such as VITON, EPDM, Silicon, PTFE, PU, FKM, etc.). For example, its NBR sample is used in normal rubber packing jacks. In general, due to the practicality of this device, many centers offer them, which include backup rings and O-rings.