Place of Origin:
Guangdong,China
Brand Name:
ORK
Certification:
FDA,ROHS,ISO9001,TS16949
Model Number:
Customized
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Automotive / Oil Exploration FKM O-Rings Metric Excellent Chemical Resistance
FKM O-RINGS:
O-Rings are available in five different materials from Scientific Instrument Services. Each type has its advantages and disadvantages as listed in the O Ring Comparison Chart. Of the various types of O-Rings available from SIS, FKM® is the most popular for mass spectrometers and other laboratory instruments. This is due to FKM®'s high temperature stability and good resistance to chemicals and ozone. Kalrez® has the same advantages as FKM® but it has greater chemical and temperature resistance. However Kalrez® is considerably more expensive than FKM®. As a class both FKM® and Kalrez® are known as Fluorocarbon Rubber (FKM) type O-rings.
Commercial Trade names for FLUOROCARBON RUBBER (FKM) type O rings
FKM® 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 FKM® 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, FKM® 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. FKM® is recommended for most applications and Kalrez® is only used where the additional temperature range can be justified by the increased cost.
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FKM® and Kalrez® are recommended for:
FKM is not recommended for:
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O-Rings are available in sizes (sizes 0, 1, 2 and 3) which correspond to the diameter of the cross section of the O-Ring. Within these groups the O-Rings are classified according to their inside diameter. To see a complete selection of the various sizes and types of O-Rings available from Scientific Instrument Services, just click on the hyperlink on the size list above. If the size you require is not listed, it may still be available
FKM® O-Ring General Attributes
Common Applications for FKM® O-Rings
| Flurocarbon Compuond | Available Specifications | Key Characteristics | Average Temperature Ranges |
| Commercial | ASTM D2000 | Available in black or brown. Excellent resistance to head and a wide range of chemicals. | 5° to 446°F |
| AMS7276 | AMS 7276, M83248/1, Mil-R-83248 CL1, Dwg AS3208, AS3209 |
Meets AMS7276. Excellent resistance to heat, engine oils and lubricants, ozone and weathering. Low compression set and good fuel resistance. | -13° to 392°F |
| AMS7259 | AMS 7259, M83248/2, Mil-R-83248 CL2, Dwg AS3581 |
Meets AMS7259. Similar to AMS 7276 above except in 90-durometer hardness. | -13° to 392°F |
| M83485/1 GLT Type | M84385/1, AMS-R-83485, Mil-R-83485 |
Meets AMS-R-83485. Excellent heat resistance and low temperature performance. GLT Type FKM. | -35° to 400°F |
| GFLT FKM | ASTM D2000 / SAE J200, M7HK 710 A1-10 B38 EF31 Z1 Z2 Z3 |
GFLT based FKM. Good for low temp with improved chemical resistance. Listed for fuel/alcohol applications. | -31° to 392°F |
| FDA FKM | ASTM D2000 / SAE J200 M2HK 710 A1-10 B37 B38 EF31 F15 Z |
FDA, USDA, and NSF grades available. | -4° to 392°F |
| FKM Extreme | Extreme chemical service. Strong bases and amines. Peroxide cured. | -4° to 392°F | |
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