Material Used For Manufacturing

Fluroelastomer or FKM is a class of synthetic rubber designed for very high temperature operation. FKM provides extraordinary levels of resistance to chemicals, heat and oil, while providing useful service life above 200°C. FKM are not a single entity but a family of Fluoropolymer rubbers. Fluroelastomer or FKM can be classified by their fluorine content, 66%, 68%, & 70% respectively. This means that FKM rubber having higher fluorine content, have increasing fluids resistance derived from increasing fluorine levels.

Properties of Fluroelastomer (FKM)

• Fluroelastomer have excellent resistance to chemical attack by oxidation, by acids and by fuels.
• They also have good oil resistance.
• They have limited resistance to steam, methanol, hot water, and other highly polar fluids.
• The outstanding heat stability and excellent oil resistance are due to the high ratio of fluorine to hydrogen, the strength of the carbon-fluorine bond, and the absence of unsaturation.
• The latest FKM polymers have a much broader fluids resistance profile than standard Fluroelastomer.
• They are able to withstand strong bases and ketones as well as aromatic hydrocarbons, oils, acids, and steam.
• Peroxide cured fluoroelastomers have inherently better water, steam, and acid resistance.
• . Maximum operating temperatures run from 400°F in continuous service up to 500°F in intermittent service
• Also available in an FDA compound. 

Nitrile Rubber  is a synthetic rubber produced by polymerization of acrylonitrile with butadiene. This rubber is also known as NBR, acrylonitrile-butadiene rubber, acrylonitrile rubber, nitrile-butadiene rubber, and NR. This type of synthetic rubber is widely used in a number of applications.

Properties of NBR:

• Nitrile Rubber belongs to the family of unsaturated copolymers of acrylonitrile and butadiene.
• The physical and chemical properties of this rubber vary depending on the polymer’s composition of acrylonitrile.
• Different grades are available for this rubber. The higher the acrylonitrile content within the polymer, the higher the oil resistance.
• It is generally resistant to fuel and other chemicals.
• It can withstand a range of temperatures.
• It has inferior strength and flexibility, compared to natural rubber.
• These rubber is also resistant to aliphatic hydrocarbons.
• It is less resistant to ozone, aromatic hydrocarbons, ketones, esters and aldehydes.
• It has high resilience and high wear resistance but only moderate strength.
• It has limited weathering resistance.
• It can generally be used down to about -30 degree celcius, but special grades can also operate at lower temperatures.

Properties

Neoprene rubber does not has just one outstanding property, but its balance of properties is unique among the other types of synthetic rubber. It has the following properties

• Good mechanical strength.
• High ozone and weather resistance.
• Good aging resistance.
• Low flammability.
• Chemicals resistance.
• Moderate oil and fuel resistance.
• Adhesion to many substrates.
• Polychloroprene or neoprene rubber can be vulcanized by using various accelerator systems over a varied temperature range.
• It is less resistant than natural rubber to low temperature stiffening. This helps in giving improved low temperature resistance.

Crude Natural Rubber is found in the juices of many plants, including the shrub guayule, Russian dandelion, goldenrod and dozens of other shrubs, vines and trees. The principal source is the tree Hevea Brasiliensis which is native to Brazil. Natural rubber has high resilience, good tensile strength and good tear resistance. It does not perform well when exposed to chemicals and petroleum derivatives. Natural rubber is inferior to many of the synthetics in heat aging, resistance to sunlight, oxygen, ozone, solvents and oils.

SBR is a copolymer of styrene and butadiene and has properties similar to natural rubber. It has greater abrasion resistance than natural rubber, better wear resistance and better low temperature flexibility. Though superior in water resistance to natural rubber, it has about the same resistance to solvents and chemicals. It has better heat resistance and heat aging qualities than natural rubber, and in excess heat it hardens and becomes brittle instead of softening as does natural rubber. Resistance to sunlight and ozone is similar to natural rubber

Butyl Rubber is a copolymer of isobutylene and isoprene. It has exceptionally low gas and moisture permeability and outstanding resistance to heat aging, weather, ozone, chemical attack, flexing, abrasion and tearing. It has good resistance to phosphate ester based hydraulic fluids, and has excellent electrical isolation performance. Butyl is not recommended for use when in contact with petroleum oils and fluids

When parts are fabricated from TFE (polytetrafluroethylene) the exceptional chemical, electrical, mechanical and thermal properties, become apparent. TFE properties are as follows: extreme corrosion resistance, excellent weathering, nonflammable, very low frictional coefficient, no-adhesive, high heat resistance, and surface resistivity, FDA compliant, USDA approved. The working temperature range for Teflon is -200°C to +260°C (-328°F to +500°F).

EPDM combines excellent resistance to deteriorative effects of ozone, oxygen, weather, heat and many chemicals. Its serviceable temperature range is -40°F to +250°F and intermittent to +275°F. It is not recommended for use in contact with petroleum oils or fluids. Also available in an FDA compound.