Technical Information
Availability of Materials
Common properties for elastomers and their uses for an inflatable seal or bladder will vary by application. Each application will require a brief study to determine the appropriate compound and material usage. Most inflatable seals are made using a 50 to 70 durometer Shore-A compound. Temperature and chemical resistance issues can also be addressed by utilizing custom compounds for a given application.
Technical Data and Information
Inflatable seals & bladders can be used for a wide range of applications. Weiler produces inflatable seals for both OEM and MRO applications as well as custom one time projects. Unique inflatable seal profiles coupled with extensive molding capabilities give us a wide range of development platforms to build upon.
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Typical Chemical Resistance and Properties of Elastomers
| Elastomer | Natural Rubber | Ethylene-Propylene | Neoprene | Nitrile | Silicone | Styrene-Butadiene | Viton |
|---|---|---|---|---|---|---|---|
| Abbreviation | NR | EPDM | CR | NBR | VMQ | SBR | FKM |
| Max Dry Temp (F°) | 220 | 300 | 212 | 250 | 420 | 212 | 400 |
| Lowest Dry Temp (F°) | -60 | -40 | -30 | -30 | -80 | -20 | -10 |
| Generally Resistant To | Most Moderate Chemicals, Wet or Dry. Organic Acids, Alcohols, Ketones, Aldehydes | Animal and Vegetable Oils, Ozone, Strong and Oxidizing Chemicals | Moderate Chemicals and Acids, Ozone, Oils, Fats, Greases, Many Oils and Solvents | Many Hydrocarbons, Fats, Oils, Greases, Hydraulic Fluids, Chemicals | Moderate or Oxidizing Chemicals, Ozone, Concentrated Sodium Hydroxide | Similar to Natural Rubber | All Aliphatic, Aromatic and Halogenated Hydrocarbons, Acids, Animal and Vegetable Oils |
| Gas Impermeability | Average | Average | Good | Good | Poor | Average | Good |