Seeking advice on the selection of valve core and seat materials for S30 control valve
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Hello, dear colleagues. For Phase 1, the valve core and seat of the S30 valve were made of 316 material with a stainless steel alloy deposited on its surface; however, after some time of use, internal leakage occurred in the valve, which was attributed to erosion of the valve core. Now, Phase 2 is being carried out to address this issue. Is it feasible to use 40Cr for the valve core of this valve? Are there any better materials that could be used? I would appreciate some advice from experts{:2_32:}{:2_32:}
Bring out the operating conditions. Who understands you, S30?
That of yours can’t be solved just by changing the material.
There’s no issue with your 316+STL material; the problem lies in the design of the valve core and in how many noise reduction stages the sleeve has. Additionally, you could consider installing a noise reduction orifice plate behind the valve to increase the back pressure
Sorry, the S30 uses 3.0 MPa saturated steam
A soda separator is installed in front; all valve internals are made of 440B. The area from the separator to the valve outlet is properly insulated, and this has been verified.