| Material | Performance characteristics | Applicable fluid | Precautions |
| Overall | 1. The inner surface is smooth, and it is not easy to adhere to the deposited layer 2. Superior corrosion resistance 3. Wide fluid temperature range |
1. High permeability liquids such as hydrofluoric acid, hydrochloric acid, and acetic acid 2. Sulfuric acid, caustic soda, electrolyte, and other strong corrosive liquids 3. Liquids that are prone to scaling, deposition, adhesion, and solidification 4. Liquids with hygienic requirements |
1. Poor wear resistance 2. Not resistant to corrosion or erosion by some oxides and a few liquids |
| PTFE | 1. Fluoroplastics have the best chemical resistance, except for the non-corrosion listed in the precautions, almost all chemical media are resistant 2. It cannot be bonded to the measuring tube, cannot be injection molded, can only be fitted closely to the sleeve, and cannot be used for negative pressure |
Chlorine trifluoride, oxygen trifluoride, and other fluorides at high temperatures, as well as liquid fluorine, liquid oxygen, ozone, etc., are not resistant to corrosion | |
| PFA | 1. Chemical resistance is slightly inferior to PTFE 2. It can be injection molded and has a strong bond with the measuring tube 3. Can be used for higher negative pressure 4. There is a trend to replace PTFE |
The medium that is not resistant to PTFE | |
| F46 | 1. The chemical resistance is slightly inferior to that of PTFE 2. It can be injection molded and has a strong bond with the measuring tube 3. Can be used for higher negative pressure |
1. Medium that is not resistant to PTFE 2. Not resistant to fuming nitric acid, butyl lithium |
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| F40 | 1. Chemical resistance and processing technology are similar to FEP 2. Radiation resistance to nuclear radiation is better than other fluoroplastics |
The medium that is not resistant to FEP | |
| Polyurethane | 1. Excellent abrasion resistance, 10 times that of natural rubber, suitable for slurries containing solid particles such as silt, gravel, etc. 2. Poor abrasion resistance, can only be used for weak acids, weak bases, and other liquids |
Seawater, mud, sludge water, mineral slurry, coal slurry |
1. Cannot be used for acid, lye, and mailing solvent mixture 2. Suitable for lower temperature |
| Neoprene chloroprene gum |
1. Medium abrasion resistance 2. Compared with other rubbers, it has better oil resistance and chemical resistance |
Water, sewage, seawater, industrial water, muddy water | For organic solvents and some acids, The weak corrosion resistance of lye |
| Ceramic | 1. Wear resistance is about 10 times that of polyurethane rubber 2.No deformation under high temperature and high pressure 3. Brittle, not resistant to drastic changes in liquid temperature 4. The inner surface is smooth, not easy to adhere to the scale |
1. Hard grout 2. Corrosive liquid 3. High-temperature Takano liquid 4. Easy to adhere to scaling liquid |
1. Poor thermal shock resistance 2. Poor mechanical impact resistance, brittle and fragile, to prevent uneven clamping force 3. It should be used in hydrofluoric acid, phosphoric acid, and strong lye, pay attention to it |