Are the inlet and outlet sizes of the safety valve the same?
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Are the inlet and outlet sizes of the safety valve the same? Is exports still greater than imports? What about the laryngeal diameter? Is the throat diameter also specified in DN terms?
The inlet and outlet sizes of a safety valve are generally the same, but in some special cases the outlet is larger than the inlet. The throat diameter of valves is usually specified using the DN designation, which indicates the inner diameter size of the valve. .
Not necessarily; generally, for valve-core slightly-open safety valves, the inlet is equal to the outlet； In safety valves with a fully open valve core, the outlet is larger than the inlet; the larger outlet size is necessary to meet the requirements regarding discharge volume. Examples of commonly used safety valves include the A*7/A47 series, in which the inlet and outlet are of the same size ； The A*8/A48 series has a larger bore for export than for import.
It’s not necessarily the case that the outlet diameter is larger than the inlet diameter; the diameter needs to be calculated, and it is generally a bit smaller or the same as the diameter of the inlet
There are large and small ones; there is no comparison possible. However, the inner diameter of the outlet is larger than the throat diameter except in special cases. The nominal diameter is not necessarily the case, but the actual discharge area is greater than or equal to the throat diameter.
The slightly open type is used for liquids where the medium does not expand; the inlets and outlets of the safety valve, etc. are designed accordingly； The full-open type is used for gases where the medium expands, and the outlet of the safety valve is larger than the inlet.