What are the advantages and disadvantages of Teflon mesh ...

Teflon mesh belt, as a high-performance, multi-purpose composite material product, has many advantages, but at the same time there are some disadvantages. The following is a detailed analysis of its advantages and disadvantages:

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Advantages

Good high temperature resistance: Teflon mesh belt can be used for a long time in a high temperature environment, and its temperature resistance can reach 260&#; without generating harmful gases and vapors. This feature makes it widely used in food processing, pharmaceutical, chemical and other industries that require high temperature treatment.

Good non-adhesion: The surface of Teflon mesh belt is not easy to adhere to any substances, including oil stains, stains, paste, resin, paint and other adhesive substances. This non-adhesion makes Teflon mesh belt easy to clean and maintain, and at the same time avoids contamination and damage to the conveyed goods, improving the quality and hygiene standard of the products.

Chemical resistance: Teflon mesh belt is resistant to strong acids, alkalis, aqua regia and various organic solvents, which gives it a significant advantage in handling corrosive substances.

Good dimensional stability and high strength: Teflon mesh belt has good mechanical properties, good dimensional stability (elongation coefficient is less than 5 &#;), and is able to maintain stable performance under various working conditions.

Bending fatigue resistance: Teflon mesh belt can be used in smaller wheel diameter conveyor equipment, showing good bending fatigue resistance.

Pharmaceutical resistance and non-toxicity: Teflon mesh belt is resistant to almost all pharmaceutical items and non-toxicity, which provides a safety guarantee for its application in pharmaceutical, food and other industries.

Fire retardant: Teflon mesh belt has fire retardant properties, which improves the safety of the equipment.

Good air permeability: The air permeability of Teflon mesh belt helps to reduce heat consumption and improve drying efficiency, which is especially important in textile, printing and dyeing industries.

Disadvantages
High price: Teflon mesh belts are more expensive compared to other conveyor belts, which limits their use in some low-cost projects.

Poor abrasion resistance: The surface of Teflon mesh belt is relatively smooth and does not have good abrasion resistance, which makes it easy to be scratched and abraded by objects. Therefore, its service life may be affected in applications that require frequent contact with sharp or hard objects.

Not suitable for large-scale conveying: Teflon mesh belt is more suitable for small and medium-sized conveying projects, and may not be the best choice for large-scale conveying projects. This is mainly because of its relatively limited carrying capacity and tensile resistance, which makes it difficult to meet the needs of large-scale conveying projects.

To summarize, Teflon mesh belt has significant advantages in high temperature resistance, non-adhesion, chemical resistance, etc., but at the same time, there are also shortcomings such as high price, poor abrasion resistance, and not suitable for large-scale conveying. When choosing to use Teflon mesh belt, it is necessary to make comprehensive consideration according to the specific application scenarios and needs.

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Post time: Sep-10-

The strength of a metal belt changes with change in temperature: this fact is always considered while choosing the metal for a specific application. Although strength factors are only a part of the process, while choosing materials for the belts, several other factors are also taken into consideration such as atmosphere, temperature limit and heating effect on the surface of the mesh belt.The following instructions should be taken into account while choosing a material in combination with the strength factors table for the use with weave, double weave and compound weave belts.

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Trade name ANSI No. Chromium Nickel Carbon Silicon Manganese Columbium Other elements Weight ratio to steel Plain steel C  &#; &#; .10 .15 to .30 .30 to .50 &#; &#; 1 High carbon Steel C &#; &#; .37 to .44 .15 to .30 .60 to .90 &#; &#; 1 C  &#; &#; .60 to .70 .15 to .30 .60 to .90 &#; &#; alloy Mayari R 0.80 to 1.1

0.40 to 1+

1 .48 to .53

120

.20 to .35

.20 to .90

.70 to .90

.50 to 1

 &#; 0.15 V min, 0.10 Zr Max 1

1

3% chrome  &#; 2.75 to 3.25  &#; .10 to .15 1 to 1.50 .40 to .60 &#; 0.40 to 0.60 Mo 1 17% chrome T430 14 to 18  &#; .12 1 1 &#; &#; .98 18-8 &#; 18 to 20 8 to 12 .08 1 2 &#; &#; 1.02 18-12 Mo T304 16 to 18 10 to 14 .08 1 2 &#; 2 to 3 Mo 1.02 Carpenter 20Cb T316 19 to 21 30 to 38 .07 1 2 8 x C min. 1 max 2 to 3 Mo, 2 to 3 Cu 1.02 18-10 #20 17 to 19 9 to 13 .08 1 2 10 x C Min  &#; 1.02 25-12 T347 22 to 24 12 to 15 .20 1 2  &#; &#; 1.02 25-20 T309 24 to 26 19 to 22 .25 1.50 2  &#; &#; 1.02 25-20 Si T310 23 to 26 19 to 22 .25 1.50 to 3 2  &#; &#; 1.02 35-19 527 19 to 20 34 to 36 .10 1.25 to 1.75 1 Bal Fe .98 35-19 Cb 520 21 to 22 34 to 36 .10 1.50 to 2.50 1 .75 to 1.25 Bal Fe 1.01 72-16 Inconel 600 14 to 17 72 .15 .50 1  &#; 0.50 Cu max, 6 to 10 Fe 1.07 72-16 Cb Inconel 604 14 to 17 Bal .10 .75 1 1.75 to 2.75 0.50 Cu max, 6 to 10 Fe 1.08 80-20 Cb  &#; 19 to 20 Bal .10 .75 to 1.50 1 .75 to 1.25 1 Fe 1.07 Hastelloy X &#;  20.5 to 23 Bal .05 to .15 1 1  &#; 8 to 10 Mo, 0.2 to 1 W, 17 to 20 Fe, 0.5 to 2.5 Co 1.05

The welded Nichrome wire mesh belts are produced in a regular fabric by inserting a connector into each spiral pair. The applicable belt types are: Balanced (B), Double balanced (DB), Cleartrac (CTB) and Compound balanced (CB).

Adjustments

1. If the connector gauge is double or higher gauges heavier than the spiral gauge, then the consecutive larger wire size is used to find the maximum permissible tension.

2.Permissible tension at the high temperatures = lbs/foot max allowable tension at room temperature/strength factor.

3. The following diagram shows a single belt. For compound balanced CB belts, the chart value is multiplied by the count of elemental belts, a number immediately following CB in the mesh designation.

Highest permissible tension chart                                

Alloys Increase Low chrome alloys 0 % Steel grades 410, 430, 304 10 % Steel grades 309, 314, 330 20 % Nichrome Inconel 20 % High carbon steel 33 %

Strength factors for elevated temperature applications using Metal mesh belts

Material Temperature, oF 500 600 850 900 950 HC 1.1 1.3 2.4 2.6 2.9 3.2 C C T304 1.8 1.9 3.8 4 4.3 4.5 6 7.9 8 9.5 10 T309 3.7 4.3 4.5 7.5 10 T310 1.3 1.41 1.42 1.46 1.5 1.8 3. 3.5 4.6 5 T321 2.9 4.4 35-19Cb 2 2 2 2.4 2.8 2.9 3.3 3.4 T347 2.4 2.5 2.6 2.64 3.1 3.9 4.3 5 6 T430 1 1.8 2.4 2.5 3 6 11 15 T316L 1 1.12 1.15 1.23 1.3 1.6 2 2.5 4 4.9 3% Cr 2.4 2.6 2.7 2.8 4 10 Mayari 1.5 2 2.7 3 3.5 3.8 1% Cr 4.4 T314 4 4.2 4.8 5 Inconel 1.4 15 1.6 1.9 2.2 2.3 3 4 Material Degree F T309 10 15 31 T310 5 5.5 9 11 13 17 25 T314 5 5.3 8.4 10 12.3 15 20 24 25 38 50 35-19Cb 3.4 3.7 6 9 10 13 19 23 24 40 52 Nichrome 10 12 14 15 18.5 22 23 30 40 T347 6 7.5 13 13.4 Incoel 4 5 9.2 11 13 16 19 23 24 40 Nichrome VI 5.5 7 12 14 16 18 23 28 30 38 40 T316L 4.9 7.5 Hastelloy 7 8 9 12 15 16 26 36

 1. In the carbon precipitation limit, a higher grade of stainless steel 316 or 347 specifically in ornate class Lehr applications is considered.

2. For Lehr applications the mesh belt is predominately 2% chrome carbon steel, although at temperatures lower than oF, it would be costly to use high carbon steel.

3. 3% chrome is sensitive to oxidation at this temperature limit

4.   Inconel alloy in nitrogen containing conditions at temperatures more than oF can be used as it is less sensitive to nitrogen embrittlement.

5.  For infrared food processing applications, stainless steel 316 is used for temperature conditions up to oF. Steel 304 is not an optimal choice for this operation limit.

6.  Steel 316 oxidizes at temperatures more than oF.

Instructions for choosing wire analysis for metal mesh belts Material Temp  oF Description and application Plain steel low carbon C 600 Dry conditions for light and moderated stress, where no rigorous wear tends to occur, and in low temperature ovens Galvanized carbon steel C C 350 For damp or slightly corrosive conditions and caustic washing application, furnished in low carbon for moderate stresses ad in high carbon for large stresses High carbon C C Dry conditions for large weights, where rigorous wear may occur, and in moderate temperature furnaces. For example glass annealing and metal tempering bluing alloy Mayari R These alloys have different chemical composition, have features better than high carbon steel for Lehr belt operations in the glass annealing temperature limit 3% chrome For temperatures more than oF about oF, with considerably higher oxidation resistance, surface and configuration stability than 1% chrome steel and increased strength 17 % chrome T430 For corrosion resistance in the natural, fresh water, steam, food, dairy products, nitric acid and other oxidizing conditions. The steel 430 offers higher corrosion resistance than that of grade 410 and it doesn?ˉt embrittle quickly. However it offers resistance to gradual scaling at temperatures about oF, it is not often utilized in the elevated temperature conditions excluding for sulfur gases as it vigorously losses strength at temperatures more than oF 18-8 T304 Steel grade 304 has excellent corrosion resistance, particularly in the sea water and commercial conditions, polluted water, elevated temperature steam, food, dairy products, organic compounds and non-oxidizing conditions, however it offers resistance to gradual scaling up to oF, it is not widely utilized in the elevated temperature conditions as it is keen to carbide precipitation and embrittlement in the 800oF to oF temperature limit. For 800oF to oF temperature limit properties are similar to 347. 18-12 Mo T316 The inclusion of molybdenum to the basic 18 ¨C 8 analysis offers higher resistance to the identical chemical compounds that are partially corrosive to stainless steel 304. The steel grade 316 is specifically effective in corrosion resistance in sulfuric acid compounds. It also offers resistance to pitting corrosion that takes place in 18-8 kind with acetic and phosphoric acids, chlorides, bromides and iodides. Muriatic or hydrochloric acids will cause corrosion of steel 316 and steel 304. Nitric acid, although will cause corrosion of steel 316 more easily than steel grade 304. For the elevated temperature applications, the steel 347 is recommended. 25-20 Si steel 314 The steel grade 314 is widely utilized in the elevated temperature metal mesh belt applications about oF due to its high strength, outstanding resistance to oxidation and affordability. The steel 314 is commonly utilized in the copper brazing processes and for sintering of powdered metals. It contains high silicon content that significantly increases its resistance to oxidation and carburization. Due to high concentration of carbon present in this alloy, when it is used in the long periods for 800of to oF, this steel is subjected to carbide precipitation at the grain boundaries resulting feasible embrittlement and intergranular corrosion. The carbides when produced are readily re-dissolved by causing the mesh belt temperature above oF, keeping this temperature for minimum one hour, then a quick air cooling. 35-19 In the oxidizing conditions lower to oF, and under cyclic heating conditions, alloy 35-19 is recommended than steel 314. Alloy 35-19 produces a layer that is more reliable to the underneath metal than in conditions for steel 314, it also offers greater potential, lower extension and less carbide embrittlement as compare to steel 314. The alloy 35Ni-19 Cr has high resistance to thermal shock. 35-19 Cb The alloy is equivalent to 35Ni-19Cr with inclusion of columbium that prevents the carbide precipitation. Moreover its also higher silicon concentration as compare to alloy 35-19 that enhances the resistance to oxidation and carburization. Preferred when there is prolonged exposure in the temperature limits of oF to oF limit and where the highest temperature does not increase more than oF. It offers high oxidation resistance to carburizing and carbonitriding conditions at temperatures about oF Inconel alloy 600 The superalloy Inconel has significant chemical compositions. Analyses show its higher scaling resistance in the cyclic heating operations in the oxidizing conditions than the earlier Inconel test. In the sulfur free conditions, this alloy can be used at temperatures about oF. In the sulphurous conditions, its applications are limited to oF for oxidizing and oF for reduction applications.

Inconel alloy 600 offers greater strength as compare to steel grades 314 and 35-19 at temperatures more than oF. It has outstanding resistance to intragranular corrosion at the elevated temperatures and its resistance to hydrogen, ammonia and nitrogen enables to be used in the nitriding conditions. Inconel alloy offers outstanding resistance to molten aluminum brazing flux.

Instructions for wire analysis for metal mesh belts Material Max temp, of Description and uses Inconel alloy 604 This new alloy is primarily a columbium stabilized kind of standard Inconel alloy, no brittlness and ductility loss due to carbide precipitation. Containing 78% nickel, extremely higher than 40% minimum content needed for avoiding sigma phase production, therefore it will not embrittle. Inconel alloy is specifically suitable in the carburizing conditions and installations where the mesh belt is subjected to interchange nominally reducing and oxidizing conditions. 80-20 Cb The high nickel alloy has been widely utilized for several years offering prolong Instructions for wire analysis for metal mesh belt life at the high temperatures. 80-20 Cb has outstanding oxidation resistance and high mechanical strength features for the preferred application temperature limits. The inclusion of columbium as a stabilizing element provides this alloy resistance to the green rot mechanism that may take place in the temperature limit of oF to oF. Hastelloy alloy X Outstanding strength and oxidation resistance about oF is a feature of Hastelloy alloy X. It produces a extremely reliable oxide layer that doesnt spall at the elevated temperature. It also offers outstanding resistance to the reducing and neutral conditions. High price is the only exception on its use for Instructions for choosing wire analysis for metal mesh belt applications. Nichrome 70/30 alloy This nichrome alloy contains 70% nickel and 30% chromium offering high oxidation resistance in the oxidizing and exothermic conditions at temperatures in abundance of oF.

It is to be noticed that the strength is the sole factor that is considered inthe selection of metal mesh belts for the elevated temperature application. The strength values stated by different consistent lab researches show significant change in analyses of metal mesh belt applications in the field, under presumably identical conditions, often provide a broad variation in the useful life.

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