Ismat Seals Hydraulics Inc.

sharjah, United Arab Emirates

Application advantages:Excellent heat resistanceResistant to almost every chemical classExcellent 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 swellingHelium permeability is slightly higher than fluoroelastomer compoundsExtreme high cost.
Usage:All areas where extreme critical application is required.

• Spring elements
• Bushes
• Gear wheels
• Sliding elements
• Insulators
• Pump components
• Casing parts
• Valve and valve bodies
• Counter parts
• Precision parts etc etc

• 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

• 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.

To suit customized applications, the following filled grades are available readily.

1. 25% carbon filled PTFE
2. 35% carbon filled PTFE
3. 40% bronze filled PTFE
4. 70% bronze filled PTFE
5. 25% glass filled PTFE
6. 15% glass filled PTFE
7. 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,

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 -59C to 232C.

Application limitations:

• Poor mechanical properties rating.
• Low tensile strength.
• Fair compression set resistance.
• Poor resistance to ketones and oxygenated solvents.

• 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

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.

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.