The issue with the valve model
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In gate valves, for example: in 100-1.6RF(A), what does A mean?
100-1.6RF(A) is the flange model; the nominal diameter is DN100, the nominal pressure is 1.6 MPa, the sealing surface type is RF, and it uses the outer diameter of series A pipes. This post was last edited by zx9527007 on 2009-4-18 16:17.]
The sunset part was well said. AF stands for convex flange
What does A in 100-1.6RF(A) mean? It refers to the outer diameter of the A-series tube
API 6D also provides detailed specifications for valves; you can take a look at foreign standards as well.