Special thread on online calibration of safety valves 4: Are the seat and disc of the safety valve made of cast iron?
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Special thread on online calibration of safety valves 4: Are the seat and disc of the safety valve made of cast iron?
The seat of the safety valve is made of cast iron; it needs to be verified whether the safety valve disc is also made of cast iron
Alloy plating on stainless steel surface{:9022:}