| Diaphragm
Pump Materials Profile for Low Pressure Stationary Diaphragm Pumps 1/4" -
2" Air Operated Pumps |
| 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 |
