Is Pall ring high temperature packing toxic?

Whether Pall ring high temperature filler is toxic depends on its material type:

1. **PFA/PTFE material ** :

The electronic grade PFA Pall ring is stable at high temperatures (-80 ° C to 260 ° C), is super hydrophobic and non-toxic, and has a smooth surface without cross-contamination. PTFE material is also high temperature resistant and chemically inert, and no toxic release at high temperatures.

2. ** Ceramic material ** :

Ceramic Pall ring has high temperature resistance of 1200℃, excellent chemical stability, and no toxicity risk at high temperatures. However, more than 800℃ may cause structural changes due to thermal expansion, and attention should be paid to temperature control.

3. **CPVC material ** :

Temperature 60-150℃, at high temperatures may release harmful substances (such as vinyl chloride monomer), more than 150℃ is strictly prohibited, otherwise it will pollute the water quality.

4. ** Metal ** :

Stainless steel and other metal Pall ring stable at high temperature, no risk of toxicity, but need to avoid contact with strong corrosive media.

** Summary ** :

- PFA, PTFE, ceramic and metal high temperature fillers non-toxic;

PVC/CPVC material may release toxic substances at high temperatures, and the use temperature should be strictly limited (usually ≤150℃).