Suko machine can produce high quality PTFE Guide Strip or PTFE Wear Strip by ourselves. PTFE guide strip is an important component in a hydraulic cylinder where it stabilizes and reduces vertical movements of the rod. The arising side loads that the PTFE guide strip has to withstand can be significant, but the deformation of the guide strip is not permanent. It has following advantages:

1. Suitable for dry use (depending on the load).

2. Very good temperature resistance.

3. Compatible with most of the fluids in contact.

4. Easy assembly, low friction coefficient.

Suko machine is located in Economic and Technological Development Zone, Changzhou, north of China. We are manufacture of PTFE Products and seals. Our products are exported to all over the world and get much praise.

When I was writing about PTFE on the page about polymerisation of alkenes, I spent ages trying to find out why PTFE was non-stick - and failed completely.

Part of the information I found on the web I know to be untrue or illogical, but there is a mass of stuff which, to be frank, I simply don't understand. Quite a lot of what is out there is written by physicists or other non-chemists who speak a quite different language from me! It also seems to me that there is a reluctance to start right back at the level of the molecules and explain what is happening in terms of molecular interactions.

Following a number of discussions with various knowledgeable people over recent years, what follows is, I hope, logical. Whether it is also the best explanation that can be given is another matter.

The structure of PTFE molecules

PTFE, poly(tetrafluoroethene), is made by polymerising lots of tetrafluoroethene molecules.

This simple diagram for PTFE doesn't show the 3-dimensional structure of the molecule. In the simpler molecule poly(ethene) the carbon backbone of the molecule just has hydrogen atoms attached to it, and the chain is very flexible - it definitely isn't a straight molecule.

However, in PTFE, the fluorine atoms in one CF2 group are big enough to interfere with those on the neighbouring groups. You need to remember that each fluorine atom will have 3 lone pairs sticking out from it.

The effect of this is to inhibit rotation about the carbon-carbon single bonds. The fluorine atoms will tend to line up so that they are as far apart as possible from neighbouring fluorines. Rotation will tend to involve a clash of lone pairs between fluorines on adjacent carbon atoms - and this makes rotation energetically unfavourable.

The repulsions lock the molecules into a rod-like shape with the fluorines arranged into very gentle spirals - a helical arrangement of the fluorines around the carbon backbone. The rods will then tend to pack together a bit like long thin pencils in a box.

This closely touching arrangement has an important effect on the intermolecular forces as you will see.

Note: Actually, this is a simplification. You will get some kinking in the chains especially as temperature is increased.

Intermolecular forces and the melting point of PTFE

The melting point of PTFE is quoted as 327°C. That's quite high for a polymer of this sort - so there must be sizeable van der Waals forces between the molecules.

But . . . several web sites talk about PTFE having very weak van der Waals forces. If it had very weak van der Waals forces, it would be a gas - not a fairly high melting point solid. So we have a problem here!



Why do people claim the van der Waals forces in PTFE are weak?

van der Waals dispersion forces are caused by temporary fluctuating dipoles set up as electrons in the molecules move around. Since PTFE molecules are large, you would expect the dispersion forces to be large as well, because there are a lot of electrons which can move.

It is generally the case that the bigger the molecule, the greater the dispersion forces.

However, there is a problem with PTFE. Fluorine is so electronegative that it tends to hold the electrons in the carbon-fluorine bonds closely to itself - so closely that the electrons are prevented from moving as much as you would expect. We describe the carbon-fluorine bonds as not being very polarisable.

van der Waals forces also include dipole-dipole interactions. But in PTFE each molecule is sheathed in a layer of slightly negative fluorine atoms. The only interactions possible between molecules in this case are repulsions!

So the dispersion forces are weaker than you might expect, and dipole-dipole interactions are going to tend to cause repulsion. It is no wonder that people claim that van der Waals forces are weak in PTFE. You don't actually get repulsion because the effect of the dispersion forces outweighs that of the dipole-dipole interactions, but the net effect is that the van der Waals forces will tend to be weak.

And yet PTFE has a high melting point, and so the forces holding the molecules together must be strong.



How can PTFE have a high melting point?

PTFE is very crystalline in the sense that there are large areas where the molecules are lying in a very regular arrangement. Remember that PTFE molecules can be thought of as long thin rods. These rods will pack very closely together.

That means that although PTFE molecules can't generate really big temporary dipoles, the dipoles that are produced can be used extremely effectively.



So are the van der Waals forces in PTFE weak or strong?

I think you could argue it both ways! If you had PTFE chains arranged in such a way that the chains didn't have much close contact, then the forces between them would be weak, and the melting point would be low.

But in the real world, the molecules are closely touching. The van der Waals forces may not be as strong as they could be, but the structure of the PTFE means that they are felt to the maximum effect, producing overall strong intermolecular bonding and a high melting point.



Non-stick properties and friction

Virtually every site that I have looked at treats the relative lack of friction of PTFE and its non-stick properties as if they were the same effect. I don't think that's true.

The non-stick properties

This is about why things like water and oil don't stick to the surface of PTFE, and why you can fry an egg in a PTFE-coated pan without lots of it ending up stuck to the pan.

You need to consider what forces might hold other molecules to the PTFE surface. Possibilities might include some sort of chemical bonding, van der Waals forces or hydrogen bonds.

Chemical bonding

Carbon-fluorine bonds are very strong, and there is no way that any other molecule could get at the carbon chain to enable any sort of substitution reaction to take place. No sort of chemical bonding could take place.

van der Waals forces

We've seen that the van der Waals forces in PTFE aren't very strong, and only work to give PTFE a high melting point because the molecules lie so close together and there is very effective contact between them.

But it is different for other molecules approaching the surface of the PTFE. A relatively small molecule (like a water or an oil molecule) will only have a small amount of contact with the surface, and will only produce a small amount of van der Waals attraction.

A large molecule (like a protein, for example) isn't going to be rod-like and so, again, there isn't going to be enough effective contact between it and the surface to overcome the low tendency of the PTFE to polarise.

Either way, van der Waals forces between the PTFE surface and whatever is around it are going to be small and ineffective.

________________________________________

Note: As a similar example, it has been pointed out to me (February 2015) that long-chain perfluoroalkanes (big alkanes in which all the hydrogens have been replaced by fluorine atoms) can form a third phase if they are mixed with water and a hydrocarbon solvent. Because they are so weakly attracted by both, they form a third layer instead of dissolving in one or the other.

________________________________________

Hydrogen bonds

The PTFE molecules on its surface are completely encased in fluorine atoms. Those fluorine atoms are very electronegative and so will all carry some degree of negative charge. Each fluorine also has three lone pairs of electrons sticking out.

Those are exactly the conditions needed for hydrogen bonding to be possible between lone pairs on the fluorines and hydrogen atoms in water for example. But it clearly doesn't happen - otherwise there would be strong attractions between PTFE molecules and water molecules and water would stick to the PTFE.

In November 2013, an Iranian PhD student pointed out to me a 1997 paper by Dunitz and Taylor with a title "Organic Fluorine Hardly Ever Accepts Hydrogen Bonds". If you are interested, you can find it from this site if you have the right access.

They found that only a tiny number of compounds containing C-F bonds would form hydrogen bonds, whereas compounds like HF or the F- ion formed strong hydrogen bonds.

What they didn't come up with, however, was any definite explanation for this, although they suggested that a possible explanation could lie in the fact that the fluorine atom holds its electrons very tightly in towards the nucleus, and as a result the C-F bond isn't very polarisable. The electrons won't move sufficiently towards a hydrogen from water (or anything similar) in order for a hydrogen bond to form.

Personally, I have a problem seeing why that is different from the situation in H-F or a fluoride ion, both of which can form hydrogen bonds with water.

And their final sentence said:

"At the same time, it has to be admitted that, in spite of the vast amount of work on hydrogen bonding over the years, the chemical factors influencing the strength of hydrogen bonds (especially factors influencing H-bonding acceptor ability) are still not completely understood."

Summary

There are no available methods for other molecules to attach themselves successfully to the surface of the PTFE, and so it is has a non-stick surface.



The low friction

PTFE has a very low coefficient of friction. What this means is that if you have a surface coated with PTFE, other things will slide on it very easily.

What follows is just a quick summary of what is happening. This comes from a 1992 paper called Friction and wear of PTFE - a review which is available free from this link.

• At the start of sliding, the surface of the PTFE fractures, and lumps are transfered to whatever it is sliding against. That means that the PTFE surface tends to wear away.

• As sliding continues, the lumps are spread out to a thin film.

• At the same time the surface of the PTFE is dragged out into an organised layer.

• The two surfaces in contact now both have well organised PTFE molecules which can slide over each other.

What holds the PTFE layer onto the substance it is sliding against is quite complicated, and thoughts on this may have changed since the paper was written. If you are interested, you will find it discussed on the page numbered as 203 of the paper (page 11 of 19 on my pdf reader).

Non-stick coatings are all around you, helping you do many of day-to-day things we all take for granted.

In this article we’ll take a look at how your daily life could be very different if non-stick coatings had never been discovered by Roy J. Plunkett in 1938.

BUMPIER CAR RIDES

Non-stick coatings are used in springs in a car’s suspension. Imagine having to drive over speed bumps with no proper suspension system in your car. It certainly would be a lot different to the smooth journeys you’re currently used to.

MORE UNCOMFORTABLE HOSPITAL BEDS

If you’ve ever had a stay in hospital, you may not have paid much attention to the ease of which the sides of your bed were put up and down. However, it would be much more difficult and annoying for everyone involved if they kept sticking and couldn’t be moved so freely and quickly.

It’s not just hospital bed frames that use non-stick coatings. The bed sheets are also treated with a substance that helps keep the mattress dry and patients cool.

YOUR FOOD COULD TASTE QUITE DIFFERENT

How many times have you bought a loaf of bread recently only to discover it’s all burnt at the bottom?

And how often do you tuck into scrambled eggs or a nice steak and have to pick out lots of little burnt bits as you eat?


One of the main applications of non-stick coatings is in food production, bakeware and cookware. Thanks to Mr. Plunkett you don’t have to have that lingering burnt taste every time you eat a sandwich at lunchtime or cook yourself a fry-up at the weekend.

HAVING TO WEAR CREASED CLOTHES

If there were no non-stick coatings, ironing clothes would be more of a problem. Burning them completely would be one option, or perhaps everyone would just be walking around quite happily in crushed, unkempt clothes.

THE DAILY NEWS WOULD BE MORE DIFFICULT TO READ

PTFE (a type of non-stick coating) is taken in scrap form and ground down for use in printing ink to make it flow better.

Can you imagine reading a newspaper where the ink had been getting stuck as it went through the presses?

YOUR CLOTHES COULD NEED WASHED MORE OFTEN

Non-stick coatings are also used to repel molecules from attaching to our clothes. While they’re not 100% efficient at this, your attire could be a lot messier without them and your washing pile at home would soon get out of control.

BAD NEWS FOR YOUR TEETH


Your dentist has probably told you on many occasions that flossing is good for your teeth in that it prevents cavities and decay. Dental floss also uses non-stick material to help it glide ffortlessly between your teeth.

POORER VISIBILITY WHEN DRIVING

Non-stick materials are also used on wiper blades. When the rain, sleet or snow is coming down fast, the last thing you want is your windscreen wiper blades sticking rather than wiping.

It’s not difficult to picture the consequences of poor driving visibility. You know that annoying noise and smearing that happens when your blades are on their last legs? That would be the norm without non-stick coatings.

UNSTABLE BUILDINGS AND BRIDGES

Buildings and bridges are subject to movement caused by high winds, temperature changes and even seismic activity. Non-stick coatings help make sure this movement is allowed for in a stable way via slide bearings so the things that have been constructed around us remain safe.

Without non-stick coatings, the man-made world around us would be more susceptible to damage, making it more dangerous and costly to maintain.

Tags:ptfe,coating

Teflon® in your makeup? Yuck. This non-stick ingredient and other fluorinated compounds have been associated with delayed menstruation, later breast development and cancer.

WHAT ARE FLUORINATED COMPOUNDS? Fluorinated compounds are ngredients built around the element fluorine, a halogen element, with properties similar to chlorine and bromine, which are common in flame retardant chemicals.

WHAT TO LOOK FOR ON THE LABEL: Polytetrafluoroethylene (PTFE), Polyperfluoromethylisopropyl Ether, DEA-C8-18 Perfluoroalkylethyl Phosphate, Teflon.

Fluorinated compounds are extremely stable and as a result do not break down in the environment. They have been found in remote regions of the world, including the polar ice caps.

Polytetrafluoroethylene (PTFE) appears to be the most common fluorinated compound in cosmetics. It is used most widely in anti-aging products and cosmetics, likely because it provides a smooth, sleek finish. PTFE is trademarked as Teflon®, for use in non-stick cookware.

PTFE is generated using another fluorinated compound, perfluorooctonoic acid (PFOA), which may leave residual amounts of PFOA in the final ingredient. The US EPA initiated the PFOA stewardship program to reduce PFOA residues in consumer products.4 While research suggests that most PFOA exposure results from its use in food contact items, indirect exposure from consumer products is also likely. PFOA in food contact materials may be as high as 300 ppb (in popcorn bags); but to our knowledge, no studies have yet assessed PFOA contamination in cosmetics containing PTFE.

HEALTH CONCERNS: Potential contamination with perfluorooctonoic acid (PFOA) which is associated with cancer; mammary cancer; reproductive toxicity, endocrine disruption and environmental bioaccumulation and persistence.

The International Agency for Research on Cancer reviewed the research on PTFE, and determined the current data was inconclusive with regard to PTFE’s potential to cause cancer. However, a wide-ranging literature has linked PFOA, which can be a contaminant of PTFE-containing consumer products, to health effects. In addition to the specific health effects from PFOA’s, researchers have found evidence that exposures to fluorinated compounds may increase the carcinogenicity of other chemicals when exposures occur together.

PFOA has been found in body fluid samples from 99.7 percent of the U.S. adults. Other studies have found PFOA in blood serum samples taken from adults from nine countries on four continents, and an additional study found PFOA in every one of the umbilical cord blood samples from newborns in Baltimore. Higher levels of the chemical in cord blood were associated with both lower birth weight and smaller size, indicating an effect of PFOA on prenatal development.

Cancer: The International Agency for Research on Cancer has designated PFOA as a possible carcinogen. Changes have been observed in mammary gland development in animals, which may have implications for breast cancer risk in exposed girls. The mammary gland may be especially sensitive to PFOA exposure, and both prenatal and early postnatal exposure may lead to concerning changes in mammary gland development.

One study found elevated levels of fluorinated compounds in Greenland Inuit women with breast cancer compared to Inuit women without breast cancer. A study of highly contaminated regions of Ohio and West Virginia found elevated levels of testicular, prostate, kidney and ovarian cancers and non-Hodgkin’s lymphoma among individuals with higher exposures to PFOA.

Endocrine Disruption: PFOA exerts effects on the endocrine system, disruptingestrogen receptors, thyroid receptors, steroid hormones, and male testosterone levels. Another study found further evidence that PFOA can act as an estrogen on its own, but this study also found that in the presence of the natural estrogen, estradiol, PFOA acted as an anti-estrogen.

Higher concentrations of PFOA and a related compound perfluorooctane sulfanate (PFOS) were associated with current thyroid disease among US adults.

Delayed Puberty: In southeastern Ohio, adolescent girls with higher levels of PFOA in their blood, were more likely to have delayed onset of menstruation. Another study of Ohio girls demonstrated that exposures to higher levels of PFOA were associated with later breast development. While earlier breast development is a known risk factor for breast cancer, these data support a potential endocrine-disrupting effect of PFOA, which may lead to other health effects later in life.

Reproductive Toxicity: PFOA is a known developmental toxicant. PFOA exposure in utero leads to reduced weight gain during lactation, delayed sexual maturation and death in rodents. In humans, PFOA exposure was associated with pregnancy-induced hypertension (high-blood pressure), and PFOS was associated with reduced birth-weight in full-term infants. Higher levels of the chemical in cord blood were associated with both lower birth weight and smaller size, indicating an effect of PFOA on prenatal development. In a novel study of PFOA exposures among pregnant women in an electronic waste recycling area in China, mothers living in the area had higher PFOA levels than mothers in other areas; and exposures were associated with delayed physical development and adverse birth outcomes.

Other effects Both PFOA and PFOS have been associated with changes to the immune response, including inflammation. Research does not suggest an association between early life PFOA exposure and obesity in adulthoodor Type II diabetes.

VULNERABLE POPULATIONS: Pregnant women, children

HOW TO AVOID: To avoid PFOA exposure from personal care products, skip products with polyperfluoromethylisopropyl ether, polytetrafluoroethylene, DEA-C8-18 perfluoroalkylethyl phosphate or Teflon® on the label.

REGULATIONS: PFOA: US EPA set a provisional health advisory for levels above .4 ppb in drinking water.

Backup rings, also known as anti-extrusion rings of BURs, do exactly what their name implies: they act as back up support to sealing assemblies.

There are several different materials used to make backup rings, including both polymers and elastomers. The most common polymers for backup rings are PEEK, Nylon, and PTFE. Deciding which material to use is typically based on pressure and temperature requirements.

In this blog post, we will review the purpose and applications of backup rings, then discuss the ranges of pressure and temperature that PEEK, Nylon, and PTFE are suited for.

Purpose of Backup Rings

A properly designed backup ring placed between the o-ring and the clearance gap can prevent the o-ring seal from extruding into the gap while providing both support and protection to the o-ring. They work well in situations where there is a large extrusion gap, high temperatures, or high pressures.

Backup rings are are commonly used in:

valves for hydraulic circuits
chemical pumps
injection molding machines
adhesive dispensing valves
presses
machine tools
pharmaceuticals
agricultural machines
PEEK Backup Rings

PEEK can be used at pressures up to 20,000 psi and and a maximum temperature of 500°F. This makes PEEK ideal for high pressure and high temperature applications. PEEK is also available filled for addition strength and hardness. PEEK is quite compatible with a variety of chemicals, including cleaning compounds, and has low friction.

Nylon Backup Rings

Nylon 6,6 works well at pressures below 10,000 psi and a maximum temperature of 186°F. Nylon works well for high pressure applications but is quite limited with regard to temperature. Nylon 6,6 filled with Molybdenum Disulfide (MoS2) to reduce friction is commonly used for backup rings. One of the drawbacks of Nylon 6,6 is its water absorption, which can range from 0.5% to 1.4% per 24 hours.

PTFE Backup Rings

Filled PTFE (glass filled, carbon filled, graphite filled, bronze filled) works with pressures up to 5,800 psi, however virgin PTFE is limited to about 3,600 psi. Virgin PTFE, therefore, is limited to low and medium pressure applications while filled PTFE works for many medium to high pressure applications. The maximum operating temperature for PTFE is around 575°F, which makes it ideal for low pressure, high temperature applications. PTFE is very chemically resistant and has extremely low friction.

Conclusion

When it comes to backup rings, PTFE works well for low to medium pressure applications but can also handle high temperatures. Nylon can handle medium to high pressure applications but is limited by operating temperature and water absorption. When it comes to backup ring materials, PEEK is can handle the highest pressures and fairly high temperatures. Keep in mind that PEEK and PTFE are comparable when it comes to low friction and chemical compatibility, both of which are important in sealing applications

Tags:teflon ptfe,peek,nylon,back up rings

PTFE lined pipe provides unmatched chemical resistance at temperatures to 260ºC. Because its carbon chains are completely fluoronated, PTFE is chemically inert to the following broad range of commercial chemicals:
 

• All acids including hydrofluoric, hydrochloric, sulphuric and aqua regia
• Chlorides - organic and inorganic
• Sulphates - organic and inorganic
• Bleach solutions
• Solvents
• Phenols
• Caustics
• Peroxides

Combined with the chemical inertness of PTFE are its usual non stick properties. Thus a PTFE lined pipe system eliminates and/or minimises build up of deposits on the pipe walls, which otherwise would reduce flow and possibly affect processing operations.

PTFE Lined Pipe for chemical resistance at extreme temperatures
 

• Size range - 25 - 300 NB
• Steel Pipe - Welded or seamless, schedule 40
• Flanges - Any speciation (ASA 150lb STD)
• Pressure - As per steel pipe recommendation
• Max Temp - 230ºC
• Exterior Finish - Primer (ROZC) or as specified
• QA to ASTM requirement
• Dye Penetrate Test
• Welding Certificates (WPS / PQR)
• Spark Test / Electrostatically
• NDT Test
• Hydrostatic Test
• Material Certification

PTFE lined pipe is suitable for water, acid, chemical, food, mining, petroleum, gas, medical and energy applications.

Use PTFE lined piping in any application where superior chemical resistance is required. Compared to other plastic pipe lining, PTFE has been proven to reduce permeation rates by up to 60%. It is also far more resistant to corrosion and high temperatures, and it features a full vacuum rating up to 450°F.

As a result, PTFE lined pipe and fittings are ideal for severe service applications, including pulp and paper processing, and power generation. Compared to exotic alloy materials or glass lining, PTFE is an economical choice that gets the job done right.

Our PTFE lined & jacketed steel dip pipes and spargers are manufactured to the highest standards in the industry. All units are given extreme stress tests to validate their integrity and ensure long life.

PTFE is one of the most versatile materials used for lined pipe and fittings. It is near-universally chemically resistant and capable of withstanding temperatures as high as 450°F (230°C), making it ideal for handling nitric acid, oleum, nitrobenzene and other fluids used in industrial and manufacturing processes.

Choose a PTFE pipe fitting for pharmaceutical, food and beverage, and other applications where performance can’t be sacrificed in the name of cost savings.

• Size: 25 NB to 450 NB
• Pipe material: 106 grade B Sch 40 from 25 NB to 150 NB
• Flanges used: ASTM A 105/IS 2062
• Hydro test: at 29.8 Kg/cm2
• Spark test: 15 KVA

Extrusion PTFE Rod has a wide range of practicable temperature from -180C~+260C and a wax-like surface to which anything hardly sticks. Extrusion Teflon rod has the lowest coefficient of friction of all known solid materials. Extrusion Teflon bar has the best electrical properties of all plastic.


Use of the Extrusion PTFE bar The electrical insulation used under various kinds of frequency, the seal liner of various kinds of corrosivity medium, Antisticking materials, lubrication material.

Project Name	Unit	Result
Apparent Density	g/cm3	2.1 ~ 2.3
Tensile Strength	Mpa	≥ 14.0
Ultimate Elongation	%	≥ 150
Dia. ( mm )	4, 5, 6, 7, 8, 9, 10, 12, 15, 18, 20, 25, 30, 35,
40, 45, 50, 55, 60, 65, 70, 75, 80 ...150.. .200
Length ( mm )	1000mm ; 2000mm

• Material: 100% recycled PTFE granular resin
• Style: Extruded PTFE Rod
• Diameter: 5mm ~ 120mm
• Length: 100mm ~ 3000mm. etc.
• Density: 2.1 ~ 2.3 g/cm3
• Temp: -180° C ~ + 260° C

Extruded PTFE Rod (100% recycled) is manufactured by techniques of paste extruding and RAM extruding method in the diameter from 5 to 110mm with PTFE granular resin. As PTFE(Teflon) has a very low co-efficient of friction, the surface of extruded PTFE rod has similar friction levels to ice. Extruded PTFE rod can work at -180° C ~+260° C and is the best electrical insulator of all known plastics.

Diameter(mm)		Length(mm)
Nominal	Tolerance	Nominal	Tolerance
5, 6	+0.480	100	+5.0
7, 8, 9	+0.580	100	+5.0
10, 13, 15, 16, 18	+1.100	100, 1000	+3.60
20, 25, 30	+1.130	100, 1000	+3.60
35, 40, 45, 50	+1.600	100, 1000	+3.60
55, 60, 65, 70, 75, 80, 85, 90, 100	+2.000	100, 1000	+2.50
110, 120, 150, 200	+2.500	100, 1000	+2.50

PTFE Convoluted Hose, ranging from 1/8" inside diameter up to a 4" inside diameter. Normally supplied in natural PTFE, we can also provide this convoluted tubing in FEP, MFA, PFA, ETFE, PVDF, or PEEK™.
PTFE Convoluted Tubing is available in coils or with cuffs (straight ends on each side of the tubing) that can be sized on the inside or outside diameter. Flares and flanges for fittings are available upon request.
Note: Please allow 4-5 weeks standard delivery time for this product.

Features:
 

• Teflon® Tubing - Convoluted PTFE Features
• PTFE has the lowest coefficient of friction of any solid material allowing unrestricted flow.
• Teflon PTFE moisture retention is less than 0.01% over a 24 hour period.
• PTFE has an indefinite shelf life.
• PTFE has a low void content.

PTFE Flexible Hose PTFE convoluted hose in high quality.

It can be replacement of the low strength graphite hose ceramic hose and glass hose Eliminate the high-frequency vibration.It can be the feeding and discharge hose of the tankers tanks containers and reactorsAlso connector of the dislocation pipeline or balance the displacement of the pipeline cause by weather changed or other reason1.Provide DN6-150mm length 20mm-20000mm.Customized are welcome2.Normal wall thickness:1mm-2.5mm thinnest wall can be 0.5mm3.The number of fatigue:>=100004.Enhance woven can be choosed5.Different connect way can be available Generally connected by the Flange Thread Quick connector or directly connect to the equipment fixed by the clamp or the wireWall Thickness Standard: 1.5mm-2.2mmFatigue Times1000Use: It can be used to connect low mechanical graphite porcelain and glass pipeline as supplying and discharging tube of tanker store tank container or reaction kettle. It can be used to connect dislocation pipe to balance pipeline displacement size change due to weather or other causes or to eliminate vibration of high frequency machinery. In some special occasions it can be used as tube reactor or heat exchanger.

Teflon PTFE Virgin Sheet,  1/16" - .062" x 12" x 12" White,Thickness Tolerance ±0.005".

PTFE, also known under the brand name Teflon, is a soft fluoropolymer mechanical plastic with exceptional resistance to high temperatures, chemicals, corrosion and stress cracking.

PTFE features impressive heat, mechanical toughness, electrical and low friction properties, making it the material of choice for many high heat and low friction applications.

PTFE plastic is available in FDA approved, electrical, mechanical, glass-filled and bearing grades.

Length: 34 1/4";Width: 12 3/4"

When your restaurant is in full swing, you can't afford to have anything slowing you down. With these 34 1/4" x 12 3/4" high speed toaster PTFE sheets you can offer your customers a faster, more reliable, streamlined service every time! The durable PTFE material prevents food from getting stuck and causing messes - never again will you have to worry about your toaster line running slow due to the clean up of stuck bread.

The triple-coated flouropolymer material ensures a long life of non-stick performance, up to 30% longer than many comparable release sheets. After use, simply wipe these sheets with a damp cloth for a quick and convenient clean up. Exceptionally heat-resistant, up to 500 degrees Fahrenheit, and easy to use, these non-stick toaster release sheets will help to significantly reduce a common kitchen frustration. These 34 1/4" x 12 3/4" PTFE release sheets are sure to keep your operation running smoothly for a long time to come.
 

Expanded PTFE sheet is made of 100% expanded PTFE by using special process that produces a uniform and highly fibrillated microstructure with a great lot of fibers running in multi directions.

PTFE Expanded Sheets gasketing possesses universal resistance against common chemicals, except melted alkali metal, fluorine at liquid and gas states.

It is free from asbestos and other lung-intruding materials. It meets the FDA requirements, doesn't have any corrosion and is able to be stored without any time limits. Some of its features are that it has Good Flexibility, Good Seal ability, highly compressible, Non Contaminating, and Non Toxic etc.


Advantage:1. High dielectric properties ;2. Non-toxic;3. Superb electrical insulating properties ;4. A wide working temperature range from 260°C down to liquid nitrogen temperatures (-260°C) ;5. Lowest coefficient of friction of any known material.;6. Tremendous chemical resistance;7. Limitations: low compressive & tensile strength.;8. Outstanding chemical resistance;9. Extremely low friction;10. Soft and formable;11. Good bearing and wear properties (bearing grade);12. Good weathering resistance;13. Performs well at elevated temperatures;14. Virgin and recycled materials available;15. Any sizes available.
 

Features:
 

• Maximum Pressure: 3000 pounds_per_square_inch
• Minimum Temperature: - 450 degrees_fahrenheit
• Maximum Temperature: 600 degrees_fahrenheit

Product Dimensions:
 

• Width: 2.50
• Length: 15.30
• Height: 1.40

PTFE Sheet is made in a process that produces a uniform and highly fibrillated microstructure with equal tensile strength in all directions. The result material is much softer and more flexible than any other form of PTFE sheet and as a gasket, conforms easily to irregular and rough surfaces. In addition, the material is easier to compress and minimizes creep and cold flow, associated with skived PTFE sheet. PTFE Gasket Sheet will seal all aggressive chemicals over the entire 0-14 pH range except for molten alkali metals and elemental fluorine. Made from 100% virgin PTFE, and will not contaminate or discolor end products.

PTFE Sheet is made in a process that produces a uniform and highly fibrillated microstructure with equal tensile strength in all directions. The result material is much softer and more flexible than any other form of PTFE sheet and as a gasket, conforms easily to irregular and rough surfaces. In addition, the material is easier to compress and minimizes creep and cold flow, associated with skived PTFE sheet. PTFE Gasket Sheet will seal all aggressive chemicals over the entire 0-14 pH range except for molten alkali metals and elemental fluorine. Made from 100% virgin PTFE, and will not contaminate or discolor end products.
 

Description:
 

• Braided Steel PTFE Lined / Hose 6 AN Straight to Straight 50cm with 6AN female connectors on both ends.
• Braided stainless steel outer cover for excellent abrasion resistance. 
• Max Pressure is rated to up to 4000 PSI.
• The continuous temperature rating from -70°C to 250°C.
• Hose Size: 3/8" ID or 10 mm ID
•        7/16" OD or 11 mm OD

Application:
The hose is designed to handle any fuel (including methanol and nitromethane), oil, coolant, brake, transmission, clutch, powersteering fluids and nitrous oxide. Suitable for Brake, E85, Alcohol, Nitro, transmission, cluth, nitrous, power steering, oiling, hydraulics & vacuum applications.