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Low / High Temp Resistant Viton O Rings Customized For Automobile Systems
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Low / High Temp Resistant Viton O Rings Customized For Automobile Systems

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Low / High Temp Resistant Viton O Rings Customized For Automobile Systems

 

Viton® or fluorocarbon elastomers were first introduced in the mid 1950's. Since then they have become of major importance in the seal industry. Due to its good chemical resistance, high temperature range and its low compression set, fluorocarbon rubber is the most significant single elastomer development in recent history. The working temperature range ifor Viton® is considered to be -15 to +400 degrees F (-29 to +204 degrees C), but it will take temperatures up to 600 degrees F (316 degrees C) for short periods of time. Du Pont's Kalrez® is normally recommended up to 500 degrees F (260 degrees C). On the low end, Viton® compounds have been known to seal at -65 degrees F (-54 degrees C) in some special static applications, however the normal low temperature limit is -15 degrees F (-26 degrees C). Fluorocarbon 0-rings should be considered for seal use in aircraft, automobile, scientific instruments and other mechanical devices requiring maximum resistance to elevated temperature and to many functional fluids. They are widely used in diffusion pumps on vacuum systems and on vacuum flanges on mass spectrometers and electron microscopes. Viton® is recommended for most applications and Kalrez® is only used where the additional temperature range can be justified by the increased cost.

Viton® and Kalrez® are recommended for:

  • Petroleum oils. Di-ester base lubricants (MIL-L-7808, MIL-L-6085).
  • Silicate ester base lubricants (MLO 8200, MLO 8515, OS-45.)
  • Silicone fluids and greases.
  • Halogenated hydrocarbons (carbon tetrachloride, trichloroethylene).
  • Selected phosphate ester fluids. Acids.

FKM is not recommended for:

  • Ketones (MEK, acetone). Skydrol fluids.
  • Amines (UDMH), anhydrous ammonia.
  • Low molecular weight esters and ethers.
  • Hot hydrofluoric or chlorosulfonic acids.

 

 

ORIENTAL  STAR TEST REPORT
V7501    COMPOUND
ASTM   D2000  M2HK  710  A1-10  B37  B38  EO78  EF31   F13 Z=Hardness 75±5
Press Cure                                                                                
Sheet : 5min 175                                                               
Button : 10 min 175                                                             
ORIGINAL    PROPERTIES SPECIFICATION     TEST RESULT               
HARDNESS  SHORE  A 75°±5 73
TENSILE  STRENGTH, MPA, MIN 10 10.9
ULTIMATE   ELONGATION, , MIN 150 213
SPECIFIC  GRAVITY  (g/cm3) 1.85+/-0.08 1.87
       
 HEAT  RESISTANCE  70 H . AT 250(A1-10)            
CHANGE IN HARDNESS, POINTS   +10 +5
CHANGE IN TENSILES  STRENGTH,  % -25 +26
CHANGE IN ULTIMATE ELONGATION,MAX % -25 -18
COMPRESSION SET, MAX, 22H AT 175 (B37 )    50 21.5
     
COMPRESSION SET, MAX, 22H AT 200 (B38 )    50
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Dongguan Ruichen Sealing Co., Ltd.
no 332 Hewan New Village chashan town, Dongguan, Guangdong, China (Mainland)
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