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A brief introduction to the operating conditions and characteristics of modified PTFE gaskets
Classification:
Industry dynamics
Author:
PFA tube little sister
Source:
Dankai
Release time:
2023-01-07
Visits:
Introduction to 1.
Modified PTFE gasket is a good gasket sealing material. It is a polymer compound formed by polymerization of tetrafluoroethylene. It can be used in any kind of chemical medium for a long time.
It is the lowest coefficient of friction in solid materials and the smallest surface tension in solid materials. It does not adhere to any substances, especially the stable chemical corrosion resistance.
solve many problems in China's chemical, petroleum, pharmaceutical and other fields. It is one of the best corrosion resistance materials in the world today, in addition to molten metal sodium and liquid fluorine.
All other chemical corrosive drugs, boiled in aqua regia, do not change.
Modified PTFE gasket is durable and reliable in sealing performance. This is due to its main material, Dankai PTFE itself, which has the best corrosion resistance and aging resistance.
After special processing, it has good creep resistance and cold flow resistance; it can be used safely for a long time in a wide temperature range; it is soft and easy to cut, and can be cut mechanically or manually, which is easy to install;
The backing plate is white, clean, and will not contaminate the contact medium due to falling off. The modified PTFE gasket will produce forced high elastic deformation after being stressed in the process.
The deformation is reversible, the low temperature makes it frozen, if reheated, the frozen forced high elastic deformation will gradually disappear and return to its original state. Use PTFE heat shrinkable tube for this
The characteristics of thermal shrinkage, coated on other working surfaces, make the workpiece have corrosion resistance, electrical insulation and anti-sticking.
Figure 1: PTFE gasket Source: Network
2. operating conditions
We know that the performance of the seal has a great influence on the efficiency and performance of the whole machine equipment. Dankai modified PTFE gasket has corrosion resistance, aging resistance,
Low friction coefficient and non-stick, wide temperature range, good elasticity make it very suitable for the manufacture of high corrosion resistance requirements, the use of temperature higher than 100 ℃ seals. modification
PTFE gasket for most chemicals and solvents, showing inert, strong acid and alkali, water and various organic solvents, the use of working temperature of up to 250 ℃. with good
Good mechanical toughness; even if the temperature drops to -196 ℃, it can maintain a growth rate of 5%. Modified PTFE gasket is suitable for a variety of conditions that require resistance to acid and alkali and organic solvents,
Sealing, high lubrication and non-stick, electrical insulation and good aging resistance, temperature resistance span (can work for a long time at a temperature of 250 ℃ to -180 ℃.
Performance of 3. modified PTFE gasket
The modified PTFE gasket does not contain any binders and additives. Strong resistance to chemical corrosion, special design to make it has a strong resistance to creep cold flow performance, thus.
Ensure the stability of the bolt tightening force during the sealing process; it has good flexibility, compression resilience, high and low temperature resistance, non-aging, self-lubricating, etc.; it is soft, easy to cut, and can be passed.
Mechanical or manual cutting, easy to install; has a unique ability to conform to the molding, no special increase in pressing force, greatly extending the life of the flange. Make up for the non-regular sealing surface
The sealing performance is reliable, especially the gas sealing performance is excellent.
4. applicable medium
Applicable media include water, oil, acid solution, alkali solution and almost all chemical components. Suitable for temperature, pressure alternating intense sealing parts, pipes, valves, pumps,
Static sealing elements at flange connections such as heat exchangers, towers, manholes, hand holes, etc. Due to the defects in corrosion resistance of rubber, glass, metal alloys and other materials, it is difficult to meet the requirements of the bar.
The loss caused by the coexistence of harsh temperature, pressure and chemical media is quite amazing. Dankai modified PTFE gasket with its excellent corrosion resistance, industry
It has become the main corrosion-resistant material in petroleum, chemical, textile and other industries.
In food, paper, medicine, electronics and machinery and other industrial and marine operations have a wide range of applications. Specific applications in the transport of corrosive gases in the delivery pipe, exhaust pipe,
Steam pipe, high-pressure oil pipe of rolling mill, Senior high school low-pressure pipe of aircraft hydraulic system and cold pressure system, rectification tower, heat exchanger, lining of kettle, tower and tank, valve and other chemical equipment
ready. At present, modified PTFE gasket has played a pivotal role in the national economy, such as chemical industry, machinery, electronics, electrical appliances, military industry, aerospace, environmental protection and bridges.
role.
This article is originally created by Teflon's little sister. Welcome to pay attention and take you to grow knowledge together!
Key words:
PTFE, gasket, performance, with, sealing, temperature, material, corrosion resistance, aging resistance, self-lubricating
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