What is the purpose of the Xylan coating on the valve stem
Information summary：Xylan coating is a fluoropolymer coating with polytetrafluoroethylene as the core, which can be applied to the valve stem to solve the problems of wear, corrosion, and jamming of the valve stem under various working conditions. It is suitable for complex use scenarios in multiple industries, and its specific applications are as follows:
Xylan coating is a fluoropolymer coating with polytetrafluoroethylene as the core, which can be applied to the valve stem to solve the problems of wear, corrosion, and jamming of the valve stem under various working conditions. It is suitable for complex use scenarios in multiple industries, and its specific applications are as follows:
1. Reduce friction and prevent jamming to ensure smooth opening and closing: The valve stem undergoes long-term reciprocating or rotating motion to control valve opening and closing, which can easily cause friction with sealing components and other parts, and in severe cases, may lead to jamming and biting problems. The friction coefficient of Xylan coating can be as low as 0.005, and it has self-lubricating properties, which can significantly reduce the frictional resistance during valve stem movement, avoid wear and jamming between the valve stem, seal, and packing box, and also reduce the opening and closing torque of the valve, making operation more effortless and reducing seal wear, thus improving the overall operational stability of the valve.
2. Resist multiple corrosion and adapt to harsh working conditions: Valve stems are often exposed to various corrosive environments, such as acidic and alkaline solvents in the chemical industry, salt spray seawater in marine environments, and chlorinated water bodies in the water treatment industry, which are prone to rusting or chemical corrosion. This coating can withstand corrosion from various chemical media such as strong acids, strong alkalis, hydrocarbons, etc. It can also resist corrosion from salt spray and humid atmosphere. For example, the Xylan 1052 model is specifically designed to meet the corrosion resistance requirements of offshore and underwater valves, which can avoid surface peeling and size changes of the valve stem due to corrosion, ensuring its sealing performance and structural integrity.
3. Improve wear resistance and extend valve stem life: In industries such as petrochemicals and power, valves may be in high frequency opening and closing cycles, and the surface of the valve stem is prone to wear and scratches due to long-term friction, which can affect the sealing performance of the valve. Xylan coating contains wear-resistant components with outstanding wear and scratch resistance. It can form a hard protective layer on the surface of the valve stem, reducing wear caused by frequent movement, significantly extending the service life of the valve stem and even the entire valve, and reducing the frequency and cost of equipment maintenance and replacement.
4. Tolerate wide temperature environments and adapt to extreme working conditions: Valves in different scenarios will face significant temperature differences, such as low-temperature environments in low-temperature refrigeration systems and high-temperature environments in power plant steam valves. Xylan coating can work stably in a wide temperature range of -195 ℃ to 285 ℃, resist the influence of extreme temperatures on the valve stem, avoid material performance degradation due to drastic temperature changes, and prevent coating detachment and failure, ensuring that the valve stem can still work normally under high and low temperature conditions.
5. Adapt to hygiene and compliance requirements in special industries: For industries such as food and pharmaceuticals that have strict hygiene requirements, some Xylan models (such as Xylan 1070) are food grade coatings that are non-toxic and easy to clean. Coating it on the valve stem of this type of industry valve can prevent impurities from contaminating food or drugs due to valve stem corrosion, while avoiding the growth of bacteria due to residual media, meeting industry hygiene compliance standards, and ensuring the cleanliness of the production process.
6. Simplify maintenance and assist component management: On the one hand, the low friction and corrosion resistance characteristics of the coating reduce the maintenance frequency of the valve stem, and its non viscous properties can reduce the residual medium on the surface of the valve stem, making cleaning more convenient; On the other hand, Xylan coating comes in various colors such as blue, red, green, etc., which can be used to distinguish valve stems of different specifications or purposes through different color coatings, facilitating quick identification and management during equipment maintenance.
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