American standard butt welded bellows sealed straight flow molten salt stop valve

Moltensaltvalveintroduction

Molten salt valve as the name suggests is a specific medium for sodium nitrate and potassium nitrate development and design of a valve, named after the characteristics of the medium, because sodium nitrate and potassium nitrate is a kind of easy crystallization, large viscosity, media fluidity is very poor special medium, in order to adapt to this medium and developed, this valve whether it is valve shape, flow structure, the external environment has special requirements, If the valve shape should be designed into y shape or corner shape, with minimum flow resistance resistance to improve the viscosity of the large poor flow function, the flow channel corner should be smooth, do not appear right angles and sharp corners affect the flow and hoarding of the medium, once the working condition stops running, the medium in the pipeline should be automatically emptied instead of hoarding in the pipeline to produce crystallization, because sodium nitrate and potassium nitrate are easy crystals, In order to make the medium does not crystallize, can make sodium nitrate, potassium nitrate always maintain a liquid state must be heated to the medium, this valve is usually electric heating or steam heating, because the electric heating condition is more complicated than the molten salt valve designed by the company compared with the imported lava valve, the company's molten salt valve only needs to carry out electric heating on the valve body, the valve cover does not need to use electric heating.

Structuralcharacteristics

1. Due to the particularity of molten salt medium, in the selection of valve materials, it is necessary to resist high temperature and corrosion.

2. The valve seat shall be made of Starlite carbide or other surface hardened materials, and the valve seat and disc shall be made of different hardness. The harder material shall be used for the valve seat.

3. The surface of the valve stem and valve internals should be hardened.

Applicationspecification 

1、design, manufacturing according to API623;

2、structure length according to ASME B16.10;

3、butt end, welding groove size according to GB/T12224、ASM16.25;

4、inspection and test according to GB/T26480;

5、According to GB/T26481 for dispersion test;

主要零件材料Materials for Main Parts

结构示意图Structural diagram

 Application specification

1. Design and manufacture according to API623

2. Structural length according to ASME B16.10

3. Connection flange size according to ASME B16.5 

4. Inspection and test according to API598

5. Escapability test according to API624

性能规范 Performance specification

 主要外形尺寸 Main external dimension