When we talk about the high temperature valve, people may think the working temperature higher than 100℃ishightemperature， but actually the high temperature level definitioninindustrycommonlymeansthe temperature is more than 400℃.

When choosing a valve design and material selection, the working temperature of the valve should be compatible with the valve body and trim materials. High-Temperature Valves are found in the petrochemical, chemical, fertilizer, electric power, and metallurgy industries. The material properties of non-ferrous, carbon steel, and alloy grades, are specified according to the limits of the material.

The High-temperature grades for industry valves are:

Sub-high temperature

Sub-high temperature valves refer to the working temperature of the valve between 625f and 800f degrees.

WCB, WCC, A105, WC6, and WC9 are mainly used for corrosive services in this range: C5, CF8, CF3, CF8M, and CF3M is used

High-Temperature Level I

High-Temperature Level I is the working temperature of the valve within the range of 800f and 1025f degrees.

Materials within this range are based on CF8 Stainless steel in the ASTM A351 family.

High-Temperature Level II and Level III

High-Temperature Level II and Level III are within the working temperatures of the valve within the range of 1025f and 1350 degrees.

Materials within this range are based on CF8 Stainless steel in the ASTM A351 family.

For Temperatures above 1350f, the working temperature of the valve is classified as high-temperature Class IV and Class V. This requires application-specific recommendations and cannot be quoted routinely as the pressure-temperature level may cause plastic deformation.

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