Selection of control valves and on/off valves for superheated steam at 4 MPa and 400°C
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What type of valve is generally chosen for 4MPa 400℃ superheated steam control valves and on-off valves? What kind of valve trim should be chosen?
It is recommended to provide data related to flow rate and flow capacity, and then consult well-known valve manufacturers for reference.
For control valves, logarithmic straight-through double-seat or cage types are used; the pressure difference across the valve is high, which helps to reduce leakage and noise. The valve body is made of material that resists high temperatures and minimal expansion (several options are available). It features a long-necked graphite packing chamber, and the size of the valve head is chosen based on the diameter of the pipeline. This approach is commonly used for high-pressure steam systems, although special requirements may exist as well