What exactly does the valve flange end of RF mean?
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The flange end of the valve is HG/20592, PN63.RF. As I understand it, RF means that the sealing surface is convex; the flange is also convex. So how are this flange and that flange connected and installed? Could some expert please explain in detail what exactly it means?
In flange connections, male flanges need to be paired with female flanges, commonly referred to as \"one male and one female,\" while male flanges should be matched with other male flanges. Generally speaking, raised-face flanges should also be considered a type of flat face flange, coded as RF, while the code for raised-face flanges is M. For specific details, please refer to the explanations and illustrations in HG20592-2009. An RF face can only be connected to another RF face, while an M-face flange needs to be connected to an FM face. The compression ratio of the M/FM surface is better than that of the RF surface.
1. The flanges of the control valve body and those of the pipeline use the same standards, including the gaskets as well. The installation unit can simply connect the bolts. 2. RF is a convex-flange type with a planar seal; the sealing surface features a protrusion that fits perfectly with the sealing surface of the gasket.
Install the sealing gasket in the middle of the flange, then tighten the bolts
Is something missing? Is it SO or WN? The convex surface and the bulged surface here are not the same thing
An RF convex surface can only be connected to another RF convex surface. An M convex surface can only be connected to an FM concave surface. A T-joint surface can only be connected to a G-slot surface.