Ismat Seals Hydraulics Inc.

sharjah, United Arab Emirates

  Description POM also known as Polyacetal and Delrin. This is highly crystalline thermoplastic with a high level of stability and rigidity as well as exhibits good sliding properties. POM-C has excellent sliding properties and good wear resistance, together with its other outstanding properties, POM-C is well suited for sliding applications with medium to high loads. This also applies to applications where high levels of humidity or wetness are to be expected. POM-C is not resistant to UV rays, UV rays, in combination with atmospheric oxygen, oxidize the surface, and discoloration occurs or the surface become matt. If the material is subject to the effects UV rays for a long time, it tends to become brittle.   Application Spring elements Bushes Gear wheels Sliding elements Insulators Pump components Casing parts Valve and valve bodies Counter parts Precision parts etc etc   Main Properties The main benefits of POM are High stability, rigidity and hardness. Good impact resistance even at low temperature. Low moisture absorption. Good creep resistance. High dimension stability. Good resistance to hydrolysis. Excellent Machineability. Good electric and dielectric properties. Suitable for food industries (physiologically safe).

    Description PVC-U (Hard PVC) is an amorphous thermoplastic with no added plasticizer. It has high hardness and rigidity. According to DIN 16 927 the material is classified as normal shock resistant, however its toughness values border on being rated as highly shock resistant, which gives it a high degree of safety in regards to the design of components. PVC-U is a flame retardant material with an exceptional chemical resistance and also lower stress cracking. It shows high mechanical strength, tensile strength and works with a continues operating temperature of -15˚C to +60˚C. It can be easily glued and welded. PVC-U is not subject to any major sliding abrasion and is thus not suitable for use in sliding applications. PVC-U is resistant to acids, alkaline solutions, alcohols, oils, fats, aliphatic hydrocarbons and petrol. PVC-U is not resistant to benzole, chlorinated hydrocarbons, ketones or esters. In combination with strong oxidizing materials (e.g. nitric acid or chromic acid), there is a danger of stress corrosion cracking.   Application Pump parts Fittings Valve bodies Component parts in chemical plant construction Feed tables, machine and equipment coverings Gaskets Bearing cages Pipe lines Lamp boxes Parts in dental medicine etc etc   Main Properties The main benefits of PVC are:- Good insulation properties for electronics. High mechanical strength, tensile strength and hardness. Low water absorption. Excellent chemical resistance. Fire resistant. Easily thermoformed. Can be bonded. Good cutting properties. Colors: Grey(RAL 7011)

Description Polypropylene is a semi crystalline thermoplastic with high rigidity and very good chemical resistance. A distinction is also made between homopolymers and copolymers, copolymers are tougher but have less mechanical and chemical stability. The stock shapes offered by us are PP homopolymers as they are a superior type of PP.   Application Pump parts Component parts in chemical apparatus construction Fittings Valve bodies Product holders for electroplating processes Punching pads PP-H is subject to strong sliding abrasion and is thus not suitable for use in sliding applications. PP-H is resistant to acids, alkaline solutions, salts and salt solutions, alcohols, oils, fats, waxes and many solvents. Aromatics and halogenated hydrocarbons cause swelling. PP-H is not resistant to strong oxidizing materials (e.g. nitric acid, chromic acid or halogens) and there is a danger of stress corrosion cracking. PP-C with high impact strength and superior strength and its lower susceptibility to tension cracks are widely used for chemical, mechanical and electronic industry, e.g. tanks, lab equipments, etching equipments, semiconductor processing equipments, plating barrels, machined parts in industrial doors, swimming pools and so on. PP-S with excellent low flammability property are used for special areas, such as in ventilation systems and electrical engineering. PP-FG reinforced with fiber glass has higher strength than common PP sheets and are ideal for structural tanks and linings, Ducts and fume hoods, plating barrels and so on.     Main Properties The main benefits of PP are:- Low density compared to other materials. Minimum water absorption. Excellent chemical resistance even solvents. High corrosion resistance. Very good electrical insulator. Physiologically safe. Colors:  Natural (White)

  Description Also known as Teflon (Du Pont brand name), PTFE is a highly crystalline thermoplastic with excellent sliding properties, anti-adhesive surfaces, excellent insulation properties, an almost universal chemical resistance and an exceptionally broad temperature deployment spectrum. However, this is offset by low mechanical strength and high specific weight compared to other plastics. To improve the mechanical properties, PTFE is compounded with fillers such as glass fiber, bronze, carbon, graphite etc.   Application To suit customized applications, the following filled grades are available readily. 25% carbon filled PTFE 35% carbon filled PTFE 40% bronze filled PTFE 70% bronze filled PTFE 25% glass filled PTFE 15% glass filled PTFE 15% glass + 5% MoS2 filled PTFE For Every specific requirement, PTFE can be specifically compounded with various fillers to meet your unique requirements. Applications: Friction bearings, Bearing bushes, Shaft seals, Piston rings, Valve seats / seat rings, Insulators, Flat seals, O rings, Hydraulic seals, Test jacks, Thread guides, Anti- adhesive liners etc, Main Properties The main properties of PTFE are:- Excellent sliding properties Highest chemical resistance, also to solvents (limited with PTFE+bronze) .Resistant to hydrolysis (limited with PTFE+bronze) High corrosion resistance (limited with PTFE+bronze) Broad temperature deployment spectrum (-200◦C to + 260◦C) Resistant to weathering Does not absorb moisture Physiologically safe (not PTFE+coal/+bronze) Good electrical insulator (not PTFE+coal/+bronze) Good thermal insulator (not PTFE+coal/+bronze) Anti-adhesive Virtually unwettable with liquids Fire resistant Colors:  Virgin PTFE (White), PTFE + Bronze (Brown), PTFE + Glass (Off white), PTFE + Carbon (Black), PTFE + Graphite (Dark grey) PTFE is available sheets, rods and tubes form as well as custom molded part can be manufactured against drawing and specification. PTFE has excellent sliding properties and because of its very close static and dynamic abrasion values, it prevents the “stick-slip effect”. However, due to its low mechanical strength, PTFE has high sliding abrasion and a tendency to creep (cold flow). Hence unfilled PTFE is only suitable for sliding applications with low mechanical load, its load bearing capacity can be constructively improved by equipping the sliding element with several chambers, it must be ensured that the chambers is fully enclosed so that the slip lining cannot escape (flow out).

Description Perfluoroelastomers show ultimate performance among all elastomers. They are resistant to nearly every chemical class with some grades offering heat resistance over 300°C, this makes FFKM the material of choice for high demanding sealing applications.   Application Application advantages: • Excellent heat resistance • Resistant to almost every chemical class • Excellent outgassing performance in vacuum environments. • Wide temperature range -30° C to +300° C Application limitations: • Avoid low-molecular-weight, fully halogenated fluids and molten alkali metals.Strong oxidizing acids may causesome swelling • Helium permeability is slightly higher than fluoroelastomer compounds • Extreme high cost. Usage: • All areas where extreme critical application is required.

Description Fluorosilicone combines most of the attributes of silicone with resistance to petroleum oils and hydrocarbon fuels.Low physical strength and abrasion resistance combined with high friction limit fluorosilicone to static seals.   Application Application advantages: Excellent heat resistance. Excellent resistance to ozone, sunlight, oxidation and possesses excellent felxibility at low tempratures. Excellent electrical and flame resistivity. Excellent resistance to water, ammonia, dilute acids, alkalis, lubricating oils, fuel oils and aliphatic hydrocarbons such as kerosene. Temperature range of -59°C to 232°C. Application limitations: Poor mechanical properties rating. Low tensile strength. Fair compression set resistance. Poor resistance to ketones and oxygenated solvents.

Description PTFE Glass Fabric Cloth can truly be described by that much used work “unique”, as no other plastics material can match its combination of properties. Its typically composed of woven glass fibers coated with PTFE. As a result of which PTFE coated fabrics have the following general properties.   Application Packaging food stuff Rice bags Chemicals Heat sealing of plastic films Covering of friction areas of chutes Hoppers and guide rails Plastic bag sealing machines Mold releasing purposes etc etc Main Properties The main Properties of PTFE Coated Glass Fabic are Outstanding temperature resistance(from -170˚C to +260˚C). Excellent chemical resistance. Superior non-stick surface, easy to clean. High dielectric strength. Dimensional stability. Resistance to UV, IR and HF. Non-toxic. High quality glass fabrics combined with specially formulated high level of PTFE content produces a smooth, high gloss surface coating, it has a good abrasion resistance and tensile strength. These fabrics comes in two forms, adhesive and non adhesive. Adhesive fabrics are produced with either a silicone or acrylic pressure sensitive adhesive system. The silicone adhesive coated has a continues operating temperature range between -70˚C and +260˚C, while the acrylic adhesive coated provides high initial tack, enhanced solvent resistant and a continues operating temperature range between -40˚C and +170˚C PTFE Glass self wound adhesive tapes has excellent characteristics of PTFE for e.g excellent electrical properties, high resistance to heat, weathering, chemicals and water repellency, nonteckiness, etc. PTFE Film self wound adhesive tapes are used for laminating, winding, bundling and sealing purposes as well as electric insulation purpose.

  Description Polyurethane is an extremely versatile elastomer used in countless applications world wide. Polyurethanes mechanical properties can be isolated through creative chemistry which creates a number of unique opportunities with performance characteristics unequaled in any other material. It is our understanding of how to seize these opportunities which allow us to provide “Flexible Solutions Through Polymeric Innovation.” Short Production Lead Times: Compared to conventional thermoplastic materials polyurethane has a relatively short lead time with significantly more economical tooling costs.   Application Advantages of Polyurethane: Wide range of hardness:This classification of hardness of polyurethane relies on the prepolymers molecular structure, can be manufactured from 20 Shore A to 85 Shore D. High load bearing capacity: It has a high load capacity in both tension and compression. It may undergo a little change in shape under a heavy load, but will return to its original shape once the load is removed with little compression set in the material when designed properly for a given application. Color Ranges:  Varying color pigments can be added to it in the manufacturing process. Ultraviolet shielding can be incorporated into the pigment to provide better color stability in outdoor applications.

  Description PCTFE is a white translucent material which is very rigid, it has excellent resistance to cold flow, exhibits dimensional stability at a wide temperature range, has very low gas permeability and low moisture absorption properties, PCTFE is also FDA approved.   Application Application Advantages: Stress-crack resistance, High mechanical strength and low shrinkage rate at low temperatures provide excellent stability for valve seats. Excellent chemical resistance to all inorganic corrosive liquids. Practically zero moisture absorption. Excellent electrical properties maintained in high humidity. Application Limitations: PCTFE swells slightly in halocarbon compounds, ethers, esters and aromatic solvents.Although PCTFE has excellent chemical resistance, it is still less than that of PTFE. Usage: Cryogenicvalve seats High pressure gas seats and seals. Semi-conductor process components such as wafer boats. Sight Glasses and windows. Electrical components. Parts for high vacuum applications.

Description These are divided into three basic types PA6, PA66 and PA12  The main benefits of using PA are High mechanical strength, hardness, rigidity & toughness High mechanical damping properties Good fatigue resistance Very high wear resistance Good sliding and emergency running properties Good machining properties Good Electrical Insulating properties Good resistance to high energy radiation (Gamma & X-rays) The standard stock shapes are manufactured by two methods.  Casting & Extrusion   Casting grades:- These grades are denoted by the suffix ‘G’ and these grades exhibit high mechanical strength, stiffness, heat, impact strength, creep resistance and wear resistance  The commonly used casting grades are:-  PA6G  Standard cast Polyamides for components, and equipment that are subject to above conditions.  Colors:  natural, black.  PA6  is also available in an oil filled grade called Oilamid which offers superior self-lubricating properties and MoS2 filled grade which has a higher degree of crystallinity.  Applications:  Gears, wear pads, bushings, bearings, conveyor plates, pump impellors etc.  PA12G  This is a special purpose grade used when higher impact and shock resistance, less water absorption and improved creep resistance is required.  Extrusion Grades  Extrusion grades are denoted by the suffix ‘E’, these are produced in smaller thicknesses and diameters and offer superior damping properties to casting grades.  The commonly available grades are:  PA6E  This is a standard multipurpose grade and offer a good combination of mechanical stability, impact resistance and damping but much lower wear resistance to casting grades.  Applications:  hammer heads, gear wheel etc.  PA66E  This is harder than PA6 and is more resistant to wear but has lesser impact resistance.  PA12E  Has very low water absorption proportion hence has very good impact behavior and is tough, but is much more costlier than PA6.  Colors:  natural and black.

Description PET  stock shapes are of the semi crystalline type and have a high level of hardness, rigidity and stability with excellent sliding properties and low sliding abrasion. Because of its good creep resistance, low level of moisture absorption and excellent dimensional stability, the material is ideally suited for complex parts with the highest demands on dimension stability and surface finish. For the reasons mentioned above, only the semi crystalline type is suitable for sliding applications.  The wear resistance and sliding properties of PET-GL have been improved compared to pure PET by adding a special, homogeneously distributed solid lubricating agent.  The main benefits of PET are High stability, rigidity and hardness. Very good creep resistance and dimension stability. Very less sliding friction and sliding abrasion. Resistance to hydrolysis Physiologically safe Excellent stain resistance Better resistance to acids than PA & POM Good electrical insulating properties Resistant to high energy radiation (Gamma & X-rays) Colors: PET (natural, black), PET-GL light grey  PET has excellent sliding properties, very good wear resistance and, in combination with its other properties, is an excellent material for highly loaded sliding applications, This also applies to applications where high levels of humidity or wetness are expected.  Applications:  ratchet wheels, bushes, gears, sliding elements, insulators, casing parts, counter components, precision bearings, cam disks etc etc,