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Low Pressure Stationary Diaphragm Pumps 1/4" - 2" Air Operated Pumps
| Diaphragm Pump Materials Profile | |||
| Material / Profile | Maximum | Minimum | Optimum |
| Buna-N | 190 Deg F // 88 Deg C | -10 Deg F / -23 Deg C | 50 Deg to 140 Deg F / 10 Deg to 60 Deg C |
| General purpose, oil resistant. Good solvent, oil, water and hydraulic fluid resistance. Should not be used with highly polar solvents like acetone and MEK, ozone, chlorinated hydrocarbons and nitro hydrocarbons, | |||
| Conductive Acetyl | Governed by diaphragm material of pump | ||
| Tough, impact resistant, ductile. Good abrasion resistance and low friction surface. Generally inert with good chemical resistance except for strong acids and oxidizing agents | |||
| Polypropylene | 150 Deg F / 66 Deg C | 40 Deg F / 5 Deg C | 40 Deg to 150 Deg F / 5 Deg to 66 Deg C |
| Thermoplastic polymer. High tensile and flex strength. Resists strong acids and alkalies. Attacked by chlorine, fuming nitric acid and other strong oxidizing agents. | |||
| Hytrel | 190 Deg F / 88 Deg C | -10 Deg F / -23 Deg C | 50 Deg to 140 Deg F / 10 Deg to 60 Deg C |
| Good on acids, bases, amines and glycols at room temperature only | |||
| Urethane | 150 Deg F / 66 Deg C | 32 Deg F / 0 Deg C | 50 Deg to 110 Deg F / 10 Deg to 60 Deg C |
| Good resistance to abrasives. Poor resistance to most solvents and oils. | |||
| Santoprene | 212 Deg F / 100 Deg C | -10 Deg F / -23 Deg C | 50 Deg to 212 Deg F / 10 Deg to 43 Deg C |
| Injection molded thermoplastic elastomer with no fabric layer. Long mechanical flex life. Excellent abrasion resistance. | |||
| Teflon* | 212 Deg F / 100 Deg C | -35 Deg F / -37 Deg C | 50 Deg to 212 Deg F / 10 Deg to 43 Deg C |
| (PFA/TFE) Chemically inert, virtually impervious. Very few chemicals are known to chernically react with Teflon: molten alkali metals, turbulent liquid or gaseous fluorine, and a few fluoro-chemicals such as chlorine trifluoride or oxygen difluoride which readily liberate free fluorine at elevated temperatures. | |||
| Source: Lincoln Catalogue on Industrial Pump Materials Page 30-31 | |||