Temperature Guide
FTI Air pump selection is based, in part, on the application operating temperature. Pump materials of construction can sustain temperatures ranging from -40°F (-40°C) to 350°F (177°C).
Use the chart below and the chemical resistance chart to help determine the best materials for your application. Please note that the chart is a guide; other factors such as chemical resistance, duty point, viscosity, specific gravity, etc. also help determine pump selection.
| Material | Chemical Composition | Description | Operating Temp | |
| Min. | Max. | |||
| Polypropylene | Pure Polypropylene | Thermoplastic that is resistant to alkali and strong acids. Lightweight and tough with good tensile strength. | 32°F 0°C | 158°F 70°C |
| PVDF | Pure Polyvinylidene Fluoride | Strong fluoropolymer with excellent chemical resistance. High tensile and impact strength. | 10°F -12°C | 220°F 104°C |
| Stainless Steel | 316 Stainless Steel | Wetted stainless steel wetted components are made of 316 stainless steel. Excellent chemical resistance, high tensile and impact strength, abrasion resistant. | Limited by other materials used in pump. | |
| Aluminum | ADC 12, LM24, LM25 | Moderate chemical resistance with good impact strength and abrasion resistance. | Limited by other materials used in pump. | |
| Buna | Acrylonitrile-butadiene Rubber | Also known as Buna-N, NBR, or Nitrile. General purpose elastomer with good resistance to oil, water, solvent, and hydraulic fluid. Not recommended with acetone, MEK, ozone, chlorinated hydrocarbons, and nitro hydrocarbons. | 10°F -12°C | 190°F 88°C |
| EPDM | Ethylene Propylene Diene Rubber | Good resistance to mild acids, detergents, alkalis, ketones, and alcohols. Not recommended with solvents, petroleum oil, mineral oil, or fuel exposure. | -40°F -40°C | 250°F 121°C |
| FKM | Fluorocarbon Rubber | Good resistance to a broad range of chemicals combined with good high temperature properties. Resistant to most acids, aliphatic, aromatic, and halogenated hydrocarbons, oils, grease, and fuels. Not recommended with hot water or hot aqueous solutions. | -40°F -40°C | 350°F 177°C |
| Neoprene | Chloroprene Rubber | Also known as chloroprene (CR). General purpose elastomer with good resistance to moderate chemicals, oils, grease, solvents, and some refrigerants. Not recommended with oxidizing acids, ketones, esters, or chlorinated hydrocarbons. | 0°F -18°C | 212°F 100°C |
| SantopreneTM | Fully cured EPDM rubber particles encapsulated in a polypropylene (PP) matrix | Thermoplastic elastomer with good abrasion resistance with chemical resistance to a wide range of solvents and chemicals. Injection molded with no fabric layer. | -40°F -40°C | 225°F 107°C |
| Hytrel® | Thermoplastic polyester elastomer | Thermoplastic elastomer that combines resistance and flexibility of elastomers with the strength of plastics. Resistant to acids, bases, amines, and glycols. Injection molded with no fabric layer. | -20°F -29°C | 220°F 104°C |
| Polyurethane | Polyester Urethane | Thermoplastic that exhibits excellent abrasion resistance providing superior performance in hydraulic and abrasive applications. Injection molded with no fabric layer. | 32°F 0°C | 150°F 66°C |
| PTFE | Polytetrafluoroethylene | Chemically inert and non-reactive. Resistant to a wide range of chemicals. | 40°F 4°C | 225°F 107°C |
| FEP | Fluorinated Ethylene Propylene | Similar to PTFE in composition and similar chemical resistance but is more easily formed/shaped. Used to encapsulate FKM o-rings for superior chemical resistance. | 40°F 4°C | 225°F 107°C |
SantopreneTM is a registered tradename of Exxon Mobil Corp.
Hytrel® is a registered tradename of DuPontTM
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