Rubber seal products
 
 

Tistam supply VITON (FKM), Ethylene propylene (EPDM), Silicon rubber (SIL), Kalrez and Nitril (NBR). V-ring, O-ring, U-rin.

Also we supply other special rubber product in all sizes such as:

Diaphragm for air valve.

Diaphragm for chemical valve.

Profile any shape.

Rubber Gasket.

Rubber seals.

Rubber coated by P.T.F.E.

Rubber cord.

Rubber hoses .

Rubber Bearing ( Copper coated by rubber).

 

Properties of the rubber applied to tests by TISTAM ACADEMY

Nitrile butadiene ( NBR )

Is a copolymer of acrylonitrile and butadiene, and it is available in various ratios of these monomers.

Better Known as nitriles, reinforced NBR rubbers have good oil and gasoline resistance, tensile strength, elongation properties, heat resistance and low compression set. Special compounding is required for good weather ability.

Typical applications for these medium priced tubers are seal, O-rings, gaskets, diaphragms, pipe gaskets, tank linings, boots and bellows.

   

Ethylene propylene (EPR and EPDM)

Is produced in two types: a fully' saturated copolymer of ethylene and propylene (EPR) and an unsaturated version of ethylene and propylene plus a no conjugated diene as a third monomer (EPDM).

Being unsaturated, the terpolymer is capable of sulfur vulcanization.

The copolymer must be, and the terpolymer may be, cured with peroxides also.

   

Fluorocarbon (VITON) (FKM)

Viton is produced as either a copolymer of vinylidene fluoride and hexafluoropropylene (A family), a terpolymer of tetrafluoroethylene, vinylidene fluoride, and hexafluoropropylene (B family) or a tetra polymer composed of tetrafluoroethylene vinylidene fluoride, a cure site monomer, and either hexafluoropropylene or perfluoromethylvinyl ether (F family). These moderately expensive elastomers exhibit excellent resistance to heat, ozone, oils, mechanicals, and some solvents. Higher levels of chemical resistance or enhanced low temperature properties are achieved through the selection of the proper polymer family. The recent introduction of Viton Extreme (ETP polymer) which is produced as a tetrapolymer of ethylene, tetrafluoroethylene, perfluoromethylvinyl

ether and cure site monomer offers additional chemical resistance, approaching that of a Perfluoroelastomer, and will handle highly aggressive chemicals such as amines, steam, and polar solvents. 

 

Silicon rubber (SIL)

Silicone rubber offers good resistance to extreme temperatures, being able to operate normally from −55 C to +300 C. At the extreme temperatures, the tensile strength, elongation, tear strength and compression set can be far superior to conventional rubbers although still low relative to other materials. Organic rubber has a carbon to carbon backbone which can leave them susceptible to  ozone,UV ,heat and other ageing factors that silicone rubber can withstand well. This makes it one of the  elastomers of choice in many extreme environments.

   

Perfluoroelastomer (FFKM) (Kalrez)

Commonly referred to as Kalrez this expensive elastomer type is usually produced as a terpolymer of tetrafluoroethylene, a cure site monomer used for cross-linking.

Due to the complete fluorination of the polymer backbone, these premium material exhibit almost universal chemical resistance.

Depending on the compound ingredients employed for cross-linking, these material may also offer the ultimate in heat resistance.  

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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