Views: 0 Author: J-VALVES Publish Time: 2024-04-25 Origin: Site
Carbon Steel: Its strength decreases as the temperature rises, and it has poor corrosion resistance. However, it is inexpensive and suitable for applications with low requirements.
Alloy Steel: It has high strength and good corrosion resistance, but it is difficult to process and relatively expensive.
Stainless Steel: It has good corrosion resistance, but its strength is low at high temperatures and it is prone to creep.
High-temperature Alloy: Such as Inconel, it has excellent high-temperature strength and oxidation resistance, but it has a high cost.
PTFE: It has good corrosion resistance, but low strength and limited high-temperature resistance.
Graphite: It can withstand high temperatures and corrosion, but its sealing performance is poor.
Ceramic: It has high hardness and can withstand high temperatures, but it is brittle and difficult to process.
Valve Body Structure: The valve body should have sufficient wall thickness and strength to withstand high pressure. Optimizing the shape of the flow passage can reduce fluid impact and improve durability.
Sealing Structure: A multi-stage sealing structure (such as a porous valve seat and sleeve) can effectively reduce the pressure difference and minimize leakage.
Stress Distribution: Under high pressure, the stress distribution is uneven, which is likely to cause local stress concentration and lead to material failure.
Thermal Aging: In a high-temperature environment, materials may experience thermal aging, resulting in a decrease in strength.
Corrosion and Wear: Under high-temperature and high - pressure conditions, the corrosion rate accelerates, and materials need to have good corrosion - resistance and wear - resistance properties.
For high-performance materials, superalloys and stainless steels are preferred to ensure the strength and corrosion resistance of the valve under high temperature and high pressure.
Surface treatment: Heat treatment (such as quenching and tempering) is carried out on metal materials to improve strength and hardness.
Thicken the pressure-bearing parts and increase the wall thickness of the valve body to ensure sealing and stability under high pressure.
Optimize the flow channel design: Adopt an S-shaped flow channel and guide vanes to reduce fluid impact and improve flow characteristics.
Multi-stage sealing structure: Use a porous valve seat and sleeve to achieve multi-stage pressure reduction and reduce leakage.
Precision machining: Ensure the dimensional accuracy and surface quality of the valve and reduce machining defects.
Reliability testing: Conduct long-term tests under high temperature and high pressure to ensure the reliability of materials and structures.
