Common valve material common valve sealing surface commonly used soft materials
| Serial number | name | Code | Applicable temperature ℃ | Suitable media |
| 1 | natural rubber | NR | -50 ~ 80 | Salt, hydrochloric acid, metal coating solution, water, wet chlorine |
| 2 | Neoprene | CR | -40 ~ 80 | Animal oils, vegetable oils, inorganic lubricants, and corrosive slurries that vary greatly in pH |
| 3 | Butyl rubber | IIR | -30 ~ 100 | Anti-corrosion, anti-wear, resistant to most inorganic acids and acids |
| 4 | Nitrile rubber | NBR | -30 ~ 90 | Water, oil, waste and so on |
| 5 | Ethylene propylene rubber (EPDM rubber) | EPDM (EPM) | -40 ~ 120 | Brine, 40% boric acid, 5% ~ 15% nitric acid and sodium chloride |
| 6 | Chlorosulfonated polyethylene synthetic rubber | CSM | -20 ~ 100 | Good acid resistance |
| 7 | Silicone Rubber | SI | -70 ~ 200 | High temperature, low temperature, good electrical insulation, chemical inertness |
| 8 | fluororubber | FPM (Viton) | -23 ~ 200 | Dielectric corrosion better than other rubber, radiation, acid |
| 9 | Teflon | PTFE (TFE) | -196 ~ 200 | Heat-resistant, cold-resistant, resistant to general chemical solvents and almost all liquids |
| 10 | Meltable polytetrafluoroethylene | PFA Fs-4100 | ≤180 | A variety of concentrations of sulfuric acid, hydrofluoric acid, aqua regia, high temperature concentrated nitric acid, a variety of organic acids, such as alkali |
| 11 | Poly FEP | FEP (F46) | ≤150 | High temperature has excellent chemical resistance, sunlight, weather resistance |
| 12 | Polyvinylidene fluoride | PVDF (F2) | -40 ~ 150 | Chemical resistance is very good, excellent sunlight and weather resistance is the highest strength and the hardest fluorine plastic |
| 13 | Polychlorotrifluoroethylene | PCTFE (F3) | ≤190 | Good chemical resistance, excellent resistance to sunlight and weathering, continuous use at 198 ℃, higher strength and hardness than F46 and PTFE |
| 14 | Polyolefins | PO | ≤100 | Resistance to various concentrations of acid, alkali, salt, and some organic solvents corrosion, erosion resistance, anti-static, non-toxic |
| 15 | Polypropylene | PP | -70 ~ 100 | Excellent chemical resistance and stress cracking resistance, poor weatherability |
| 16 | Polyetheretherketone | PEEK | -46 ~ 300 | Is a high-strength high-temperature resin with excellent mechanical properties and chemical resistance, excellent wear resistance and dimensional stability for valve seals |
| 17 | Polyphenylene | PPL | ≤300 | Basic with polytetrafluoroethylene |
| 18 | Nylon (polyamide) | NYLON | ≤80 | Alkali, ammonia |
ã€Print】 ã€Close】
Automatic Seam Welding Machine
Automatic Seam Welding Machine,Automatic Girth Seam Welder,Steel Plate Long Seam Welding Machine,Girth Seam Welding Machine
Zhengzhou Yueda Technology Equipment Co., Ltd. , https://www.yuedawelding.com