Valve sealing surface issues
Thread Content
I would like to ask fellow sailors: when used as sealing surfaces, which of the three materials – Mo2Ti-based stainless steels, chromium-nickel-based stainless steels, and cemented carbides – is the best? What are their advantages and disadvantages? Specifically, J41W-16P, J41W-16R, and J41Y-16P (or R)
This needs to be determined based on the material and operating conditions
W, Y, H are codes for the material of the valve body sealing surface； W: The material of the valve body’s sealing surface is formed directly from the valve body itself, and it is gray cast iron ； Y: The sealing surface material of the valve body is cemented carbide ； H: The sealing surface material of the valve body is Cr13 series stainless steel. Yang from Shanghai Yangyi Valve Co., Ltd
Tungsten carbide has high hardness, good wear resistance, heat resistance, corrosion resistance, and erosion resistance, and is widely used in high-temperature and high-pressure environments. It corresponds to the chromium-nickel stainless steel J41Y-16P (or R) and is suitable for general applications. If the valve body is made of carbon steel, then the sealing surface is welded with 304 or 2Cr13 (welding stainless steel in this case is done to prevent the seal from failing due to rust); if the body is already made of stainless steel, no welding is required, and the part can be processed directly. It is suitable for general use in situations where the medium is non-corrosive, the pressure is not high, and the erosion level is moderate. The temperature generally does not exceed 420. It corresponds to the J41W-16P or J41W-16C Mo2Ti series of stainless steels, and is used in corrosive environments; it is not designed for high temperatures or pressures, with the main material being stainless steel. J41W-16R
Unconditional STL is better.