1. Evaluation of the use environment


Consider the concentration and temperature of the medium. Generally speaking, the higher the concentration and temperature of the corrosive medium, the stronger the corrosion effect on the Rasching Ring. For example, high-temperature and high-concentration acid or alkali solutions may accelerate the corrosion of PTFE. At this time, it is necessary to evaluate whether surface treatment is required.

If the Rasching Ring is subject to greater mechanical wear during use, such as high-speed fluid scouring, solid particle friction, etc., the surface of the Rasching Ring may be damaged, thereby reducing its corrosion resistance and service life. For example, in some fluid conveying systems containing solid particles, the Raschig ring may be hit and rubbed by the particles. At this time, surface treatment can be considered to improve its wear resistance and corrosion resistance.
2. Performance requirements analysis

When there are special performance requirements for polytetrafluoroethylene Raschig rings, such as higher hardness, better self-lubrication, lower friction coefficient, etc., surface treatment may be required to meet these requirements. For example, in some applications with high requirements for friction performance, such as seals, bearings, etc., surface treatment can be used to reduce the friction coefficient and improve the operating efficiency and life of the equipment.
If it is necessary to improve the anti-adhesion performance of the Raschig ring to prevent the medium from adhering and accumulating on its surface, surface treatment can also be considered. For example, in industries such as food processing and pharmaceuticals, the surface of the equipment is required to have good anti-adhesion properties to avoid product contamination and equipment clogging.

Judging whether surface treatment is required is based on the service life of the equipment and the service life expectation of the Raschig ring. If you want the Raschig ring to maintain good performance for a long time, surface treatment may be an effective method. For example, some key equipment or long-term process systems have high requirements for the service life of the packing. At this time, surface treatment can extend the service life of the Raschig ring and reduce the equipment maintenance cost.
3. Appearance inspection