Does the Pall ring have to be changed often

Whether the Pall ring needs to be replaced frequently depends on the type of material, conditions of use and maintenance **, as follows:

### 1. ** Normal service life **

- ** Plastic Pall ring ** (such as PP, PE) : Under normal operating conditions (such as low temperature, non-strong oxidation environment), the service life is usually **3-5 years **. Regular cleaning and maintenance can extend the service life.

- ** Metal Pall ring ** (such as 304 stainless steel) : the service life is generally **3-5 years **, and even longer under mild conditions.

- ** Ceramic Pall ring ** : Long life, up to **5-7 years **, but fragile and difficult to clean, high temperature/high corrosion environment may shorten the life.

### 2. ** Common reasons to replace **

- ** Material aging or corrosion ** : Long-term contact with strong acid, strong alkali, high temperature or high concentration of ozone and other media will lead to material degradation.

- ** Mechanical damage ** : Improper installation, media erosion or particulate wear may cause deformation and fracture of the packing.

- ** Efficiency decrease ** : When the surface of the packing is scaled, blocked or uneven distribution of gas and liquid, it needs to be replaced to maintain the performance.

### 3. ** Measures to extend service life **

- ** Select high-quality materials ** : such as electronic grade PFA/PTFE Pall ring resistance to strong corrosion and high stability.

- ** Optimized operating conditions ** : Avoid extreme temperature (such as PP material ≤250℃), pressure and pH value.

- ** Regular maintenance ** : Clean dirt, check damage, ceramic fillers need to be careful to deal with high temperature corrosion.

- ** Protective treatment ** : Anti-ultraviolet, anti-oxidation treatment of plastic fillers, metal fillers can be passivated surface.

### Summary

The pall ring does not need to be replaced frequently under standard use and good maintenance, but the performance needs to be evaluated regularly according to the working condition. For example, plastic fillers can be used stably for many years in chemical desulfurization towers, while ceramic fillers need to be replaced in time if serious corrosion occurs in ozone contact towers.