FKM O Ring Chemical Resistance
Zhejiang Jiacheng New Material Co., Ltd. is one of the leading manufacturers and suppliers of fkm o ring chemical resistance in China, also supports customized service. Welcome to wholesale bulk high quality fkm o ring chemical resistance in stock here from our factory. If you have any enquiry about quotation and free sample, please feel free to email us.
Technical Resistance Guide & Viton®/FKM Chemical Compatibility Chart
Compatibility ratings for more than 100 common chemical media (petroleum oils, fuels, aromatic hydrocarbons, concentrated acids, alkalis, and solvents) are included in this extensive industrial database.
Multi-Temperature Ratings: Assesses performance at operating temperatures as high as +200°C and +250°C (392°F and +482°F).
Engineering Standard Reference: Ratings derived from thorough laboratory immersion testing, ISO 1629, and ASTM D2000.
Custom Formulation Support: Does your particular solvent mix not work well with standard FKM? For exceptional fluid separation, our technical team creates specially blended fluororubber compositions.
Interactive Lookup Table for FKM and Viton® Chemical Resistance (100+ Industrial Media)
1. Fuels, Oils & Petroleum Hydrocarbons
Gasoline / Unleaded Fuel (20°C: Rating A | 60°C: Rating A)
Diesel Fuel / Biodiesel B20 (20°C: Rating A | 80°C: Rating A)
Jet Fuel (JP-4, JP-8, A-1) (20°C: Rating A | 100°C: Rating A)
Engine Oil (Synthetic & Mineral) (20°C: Rating A | 150°C: Rating A)
Hydraulic Fluid (Petroleum base) (20°C: Rating A | 120°C: Rating A)
Hydraulic Fluid (Skydrol / Phosphate Ester) (20°C: Rating D | 80°C: Rating D - Note: Requires EPDM/FEPM)
Crude Oil / Acidic Gas (Sour Gas H2S) (20°C: Rating B | 80°C: Rating C - Note: Requires Special Base-Resistant FKM)
2. Acids & Inorganic Chemicals
Sulfuric Acid 98% (Concentrated) (20°C: Rating A | 60°C: Rating B)
Hydrochloric Acid 37% (20°C: Rating A | 60°C: Rating A)
Nitric Acid 70% (20°C: Rating A | 50°C: Rating B)
Phosphoric Acid 85% (20°C: Rating A | 80°C: Rating A)
Acetic Acid (Glacial / Concentrated) (20°C: Rating D | 50°C: Rating D - Note: Causes severe swell)
Hydrofluoric Acid 48% (20°C: Rating B | 50°C: Rating C)
3. Solvents, Esters & Organic Compounds
Benzene / Toluene / Xylene (20°C: Rating A | 60°C: Rating A)
Acetone / MEK (Methyl Ethyl Ketone) (20°C: Rating D | 50°C: Rating D - Note: Incompatible with standard FKM)
Ethanol (20°C: Rating B | 50°C: Rating C)
Methanol (20°C: Rating D - Note: Requires Viton® type B or F)
Ethyl Acetate / Isopropyl Acetate (20°C: Rating D | 50°C: Rating D)
Methylene Chloride / Chloroform (20°C: Rating B | 40°C: Rating C)
Trichloroethylene (TCE) (20°C: Rating A | 60°C: Rating B)
4. Alkalis, Gases & Hot Water/Steam
Sodium Hydroxide 50% (Caustic Soda) (20°C: Rating D | 60°C: Rating D - Note: Standard FKM fails; Base-Resistant FKM required)
Ammonia (Anhydrous / Liquid) (20°C: Rating D | 50°C: Rating D)
Hot Water & Low-Pressure Steam (<120°C) (Rating B - Note: Requires Peroxide-Cured FKM)
High-Pressure Steam (>150°C) (Rating C/D - Note: Requires FEPM / AFLAS® or FFKM)
Ozone & Weathering (20°C: Rating A | Outdoor: Rating A)
High Vacuum (10^-9 Torr) (20°C: Rating A | 150°C: Rating A)
Note: A is the best, D is the worst
Using Mixed Solvents or Aggressive Chemicals?
For a Personalized Chemical-Resistant Sealing Solution, Speak with Our Rubber Compound Engineers
Ketones, amines, hot water, and strong bases can cause Standard Viton® (Type A) to deteriorate. Based on your precise chemical concentration and thermal cycle, our material specialists may create Peroxide-Cured FKM, Base-Resistant FKM (FEPM/AFLAS®), or High-Fluorine FKM.
Describe the environment in which you operate:
Concentration (%) and Primary Chemical/Fluid Media:
Working Pressure (Bar/PSI) and Operating Temperature Range (°C/°F):
Motion Type: Reciprocating, Dynamic, or Static Seal
Upload Working Environment Specifications and Drawings (.PDF,.CAD,.STEP) as an optional attachment.
Request a Free Engineering Evaluation and Suggestion
Quick Reaction: All inquiries are reviewed by our sealing specialists within 12 hours.
Knowing the Types of FKM Polymers and How They Resist Chemicals
The performance of FKM/Viton® O-rings varies. A fluororubber seal's chemical resistance is mostly dependent on its monomer composition, cross-linking technique (Bisfenol vs. Peroxide cure), and fluorine content (usually 66% to 70%).
Standard FKM (66% fluorine, Type A)
- Ideal For: Industrial, hydraulic, and general automotive applications. outstanding resistance to fuels, greases, mineral oils, and aliphatic hydrocarbons.
- Limitations: Inadequate defense against steam, strong bases, and polar solvents.
High-Fluorine FKM (68% to 70% Fluorine, Types B and F)
- Ideal For: Oxygenated fuels, aggressive chemical processing facilities that need less fluid permeation, and aggressive fuel systems.
- Benefit: Better resistance to swell than Type A in blended fuels, aromatic solvents, and strong acid concentrations.
FKM Cured by Peroxide (GF/GFLT Series)
- Ideal For: Situations requiring hot water, steam, acid wash, alcohol mixes, and aqueous fluids.
- Benefits include reduced compression set in hot water conditions and increased resilience to hydrolysis.
Special and Base-Resistant Polymers (FFKM, AFLAS®, and FEPM)
- Ideal For: Steam above 150°C, amines, sour oil/gas (H2S), and extremely aggressive caustic soda (NaOH).
- Benefit: Close the performance gap where base attacks cause typical FKM vulcanizates to deteriorate.
Chemical Resistance Comparison: FKM vs. NBR vs. EPDM vs. Silicone vs. FFKM
Petroleum & Fuels: FKM (Excellent) | NBR (Good) | EPDM (Poor) | Silicone (Fair) | FFKM (Outstanding)
Concentrated Acids: FKM (Excellent) | NBR (Poor) | EPDM (Good) | Silicone (Poor) | FFKM (Outstanding)
Strong Alkalis / Bases: FKM (Poor to Fair) | NBR (Fair) | EPDM (Good) | Silicone (Fair) | FFKM (Outstanding)
Ketones & Esters (e.g., Acetone): FKM (Poor) | NBR (Poor) | EPDM (Good) | Silicone (Fair) | FFKM (Outstanding)
High Temperature Steam: FKM (Fair/Peroxide only) | NBR (Poor) | EPDM (Excellent) | Silicone (Fair) | FFKM (Outstanding)
Continuous Temp Range: FKM (-20°C to +200°C) | NBR (-30°C to +100°C) | EPDM (-40°C to +150°C) | Silicone (-60°C to +230°C) | FFKM (-15°C to +327°C)
The combination of medium and temperature is not as simple as 1+1=2. If you are unsure what material is suitable for you, contact us
Get a free and professional consultation
Get in touch with SJK right now to talk about your pressing sealing issues!
Frequently Asked Questions: Chemical Compatibility of Viton® / FKM
Q: Why does standard Viton® swell or fail quickly in MEK or acetone?
A: Polar fluorinated groups included in standard FKM polymers interact negatively with low-molecular-weight ketone and ester solvents, resulting in significant swelling and tensile strength loss. PTFE, FFKM, or EPDM seals are suggested for ketone resistance.
Q: For mixed chemical streams, how can I choose the appropriate FKM O-ring?
A: A: When working with chemical mixtures, assess the resistance to the most aggressive solvent component at the operating temperature and maximum concentration. To confirm performance, our technical staff may undertake specialized fluid immersion tests.
Q: Is it possible for SJK to produce specially formulated chemical-resistant seals for certain uses?
A: Indeed. Custom FKM formulations (such as base-resistant, low-temperature, and peroxide-cured grades) that are suited to certain chemical media, operating pressures, and temperature requirements are our area of expertise.
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