Dongguan Ruichen Sealing Co., Ltd.
TO BE O RING KING
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Acid Resistant Brown FKM O Rings Metric For Aircraft Engines Seals FDA ROHS
Trade Names:
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.
| 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 | 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 | |