Views: 0 Author: J-VALVES Publish Time: 2024-04-18 Origin: Site
(I) High temperature resistance performance
Material heat resistance: Valve materials need to maintain stable mechanical properties and chemical stability at high temperatures. Commonly used high-temperature materials include alloy steels (such as 13Cr, 9Cr, 12Cr alloy steels), nickel-based alloys (such as Inconel, Hastelloy), and ceramic materials.
Thermal expansivity: The thermal expansion coefficient of the material needs to adapt to changes in working temperature to avoid deformation or stress concentration at high temperatures.
(II) High pressure resistance performance
Strength and hardness: Materials need to have sufficient strength and hardness to withstand high pressure without deformation or rupture. High-strength alloy steels (such as 20CrMo, 30CrMo) and nickel-based alloys are commonly used materials.
Structural design: Valve design needs to ensure structural integrity under high pressure, including wall thickness, sealing structure, and stress distribution.
Chemical stability: In corrosive media, materials need to have excellent corrosion resistance. Commonly used materials include 304, 316 stainless steel, Hastelloy alloy, and nickel-based alloys.
Wear resistance: At high temperatures and high pressures, fluid flow may cause wear, so materials need to have good wear resistance.
Sealing surface design: The sealing surface needs to adopt wear-resistant and corrosion-resistant materials, such as hard alloy or stainless steel surfacing to improve sealing performance.
Elastic sealing: Adopting elastic sealing seat design can compensate for the slight deviation of the sealing surface and improve sealing reliability.
(II) Valve body and bonnet
Valve body material: The valve body usually adopts forged steel or alloy steel to meet high temperature and high pressure requirements.
Bonnet design: The bonnet needs to have sufficient strength and sealing performance and is usually connected by bolts or welded.
(III) Valve stem and operating mechanism
Valve stem material: The valve stem needs to adopt corrosion-resistant materials and be equipped with appropriate sealing devices to avoid leakage at high temperatures.
Operating mechanism: The design needs to consider the operating torque at high temperatures to ensure flexible operation.
