Acid Resistant Brown FKM O Rings Metric For Aircraft Engines Seals FDA ROHS

Acid Resistant Brown FKM O Rings Metric For Aircraft Engines Seals FDA ROHS

Trade Names:

FKM® . . . DuPont Performance Elastomers
Fluorel . . . 3M Company
Technoflon . . . Solvey Solexis, USA
ASTM D1418 Designation: FKM

ASTM D2000/SAE Type, Class: HK

ORK Compound Designation: VT

Standard Color: Black

Description: Combining high temperature resistance with outstanding chemical
resistance, Fluorocarbon-based compounds approach the ideal for a universal O-
ring material.

Key Use(s): Seals for aircraft engines. Seals for automotive fuel handling
systems. High temperature/low compression set applications. Wide chemical
exposure situations. Hard vacuum service.

Temperature Range
Standard Compound: -13° to +446°F
Special Compound: -40° to +446°F

Hardness (Shore A): 55 to 90.

Features:High fluorine grades offer higher resistance to swell in high octane
and oxygenated fuel blends. This give superior performance in Ethanol/Methanol
blended gasoline. Base resistant grades offer improved resistance to amine
based oil protectants found in new transmission oils. Also, improved resistant
to steam for higher temperature services. Low temperature bases can improve
performance to -40°F.
New Polymers being offered have improved chemical resistance and low
temperature performance.
FKM® Extreme™ ETP offers similar chemical compatibility as Kalrez™ with
temperature performance with a TR(10) of -40°F and brittleness to -76°.

Limitations: Fluorocarbons (FKM®s) are not recommended for exposure to ketones,
amines, low molecular weight esters and ethers, nitro hydrocarbons, hot
hydrofluoric or chlorosulfonic acids, or Skydrol® fluids. They are also not
recommended for situations requiring good low temperature flexibility.

Acid Resistant Brown FKM O Rings Metric For Aircraft Engines Seals FDA ROHS 0

ORIENTAL STAR TEST REPORTAcid Resistant Brown FKM O Rings Metric For Aircraft
Engines Seals FDA ROHS 1
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 28.3

FLUID RESISTANCE FUEL.101. 70H AT 200℃ (EO78)
CHANGE IN HARDNESS, POINTS -15~+5 -13
CHANGE IN TENSILES STRENGTH, MAX % -40 -20.7
CHANGE IN ULTIMATE ELONGATION,MAX % -20 -8.3
CHANGE IN VOLUME % 0~+15 +10.5

FLUID RESISTANCE FUEL C, 70H AT 23℃(EF31)
CHANGE IN HARDNESS, POINTS ±5 -4
CHANGE IN TENSILES STRENGTH, MAX % -25 -20.2
CHANGE IN ULTIMATE ELONGATION,MAX % -20 -18.6
CHANGE IN VOLUME % 0~+10 +5

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