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1.FKM (Viton)O-Ring Performance Specifications
FKM,often referred to by the brand name Viton,is the premier choice for high-temperature and chemically aggressive environments.Fluorocarbon(FKM)has excellent resistance to high temperatures,ozone,oxygen,mineral oil,synthetic hydraulic fluids,fuels,aromatics and many organic solvents and chemicals.The fkm o-rings temperature range is rated for continuous service from-20℃ to+200℃,with short periods up to+230℃.Viton o-rings exhibit outstanding resistance to oxidation,weather,fuels,lubricants,and most mineral acids.Due to their fluorinated structure,FKM materials provide very low gas permeability, which is critical for vacuum applications and high-pressure gas handling.FKM seals offer low compression set,excellent aging characteristics,and superior performance in harsh environments.
2.Air Compressor,Vacuum Pump,and Centrifugal Pump Working Conditions
Fluid handling machinery such as air compressors,vacuum pumps,and centrifugal pumps experiences intense thermal stress,oil mist exposure,and chemical environments.In rotary screw air compressors,the compression process generates significant heat and oil exposure,requiring seals that resist degradation.FKM o-rings are widely used in oil-injected compressors for discharge valves,oil separators,and housings due to their excellent heat and chemical resistance.In vacuum pumps,fluorocarbon(FKM)o-rings are commonly specified for high-vacuum flanges and seals because of their low outgassing and low permeability to gases.Centrifugal pumps handling aggressive or hot fluids rely on FKM for reliable sealing in demanding conditions.The AS-222 size is frequently applied in filter housings,pressure-side flanges,and casing seals where high temperature and chemical compatibility are essential.
3.AS-222 Size Chart &Dimensions for Pumps &Compressors
The AS-222 is a mid-to-large size O-ring that provides a secure seal for industrial pump and compressor casings.
|
AS568 Dash No. |
Inside Diameter (ID) |
Cross Section (CS) |
Material |
Hardness |
|
AS-221 |
1.421 in (36.09 mm) |
0.139 in (3.53 mm) |
FKM (Viton) |
75 Shore A |
|
AS-222 |
1.484 in (37.69 mm) |
0.139 in (3.53 mm) |
FKM (Viton) |
75 Shore A |
|
AS-223 |
1.547 in (39.27 mm) |
0.139 in (3.53 mm) |
FKM (Viton) |
75 Shore A |
Conclusion
For high-demand industries using fkm o-rings in compressors and pumps,the as-222 o- ring offers the thermal stability required to prevent leaks in pressurized and hot systems. The fkm o-rings temperature range ensures seals will not harden or crack prematurely under intense heat.Always verify the chemical compatibility of your process fluid with FKM and confirm dimensions for a proper,long-lasting seal in your equipment.
