The molten salt valve series developed by Wanlong is based on the requirements of molten salt valves in photothermal systems and is an improvement of bellows valves that Wanlong has rich experience in designing and producing. The improvement is reflected in the structure to prevent salt leakage from middle flanges and the prevention of bellows. Reasonable selection of heat tracing systems and materials for molten salt crystallization. Molten salt valves include two categories: molten salt stop valves and molten salt control valves, and are used in solar thermal power generation systems using molten salt as energy storage medium. Caliber range: DN15 ~ DN500 Connection type: butt welding... The rest can be manufactured on request Operating temperature: 0°C~650°C Leakage volume: zero leakage Applicable media: salt transportation pipeline for photothermal power generation, salt transportation pipeline for molten salt energy storage, chemical molten salt furnace outlet, molten salt
| Molten salt valve parameters | ||||||
| DN | PN63 | L | D | d | H | D0 |
| 200 | 650 | 250 | 205 | 1100 | 600 | |
| 150 | 444 | 183 | 150 | 1030 | 600 | |
| 125 | 500 | 165 | 128 | 1030 | 600 | |
| 100 | 430 | 135 | 103 | 720 | 320 | |
| 80 | 380 | 110 | 79 | 610 | 250 | |
| 65 | 340 | 92 | 65 | 610 | 250 | |
| 50 | 300 | 80 | 50 | 440 | 200 | |
| 40 | 260 | 62 | 40 | 440 | 200 | |
| 32 | 260 | 60 | 35 | 440 | 200 | |
| 25 | 230 | 50 | 25 | 380 | 140 | |
| 20 | 230 | 50 | 21 | 380 | 140 | |
| 15 | 210 | 50 | 15.8 | 380 | 140 | |
| Molten salt valve parameters | ||||||
| DN | PN63 | L | D | d | H | D0 |
| 200 | 650 | 250 | 205 | 1100 | 600 | |
| 150 | 444 | 183 | 150 | 1030 | 600 | |
| 125 | 500 | 165 | 128 | 1030 | 600 | |
| 100 | 430 | 135 | 103 | 720 | 320 | |
| 80 | 380 | 110 | 79 | 610 | 250 | |
| 65 | 340 | 92 | 65 | 610 | 250 | |
| 50 | 300 | 80 | 50 | 440 | 200 | |
| 40 | 260 | 62 | 40 | 440 | 200 | |
| 32 | 260 | 60 | 35 | 440 | 200 | |
| 25 | 230 | 50 | 25 | 380 | 140 | |
| 20 | 230 | 50 | 21 | 380 | 140 | |
| 15 | 210 | 50 | 15.8 | 380 | 140 | |
design standards
Design and manufacturing: in accordance with globe valve design standard GB/T 12235-2007
structural characteristics
bellows
● The bellows is hidden in the valve cover to prevent media flushing
● Multi-layer hydroformed bellows
● At least 5000 service life (fully opened to fully closed)
●Inconel 625
● Electric heat tracing at the bellows, the heat tracing temperature is 280°C-320°C
stem and packing
● Metal inverted seal provides an additional safety line
● Valve stem full-stroke axis guidance
● Working temperature of 550°C, heat conduction simulation filler temperature is lower than 200°C
● Connection between stem and disc to prevent molten salt residue
valve body and valve cover
● Straight flow channel, DC flow channel, and right-angle flow channel
● Body and bonnet threaded connection + welding, double guarantee of strength sealing
● Octagonal gasket 316 material
● The middle flange gasket is fully positioned to prevent gasket extrusion and damage
sealing surface
● Integrated valve seat, line seal
● Integrated hard-facing cemented carbide, high hardness
● Valve seat edge, remove crystalline molten salt
Finite element analysis aided design
● Heat conduction analysis aids design to reduce risks and save energy consumption
● Flow analysis assists design to meet flow control needs
Main Parts & Materials
Body & bonnet-F347H/CF8C, A105/WCB, Inconel625
Valve seat--Stellite welding
Bellows: Inconel625, 316
Stem: Dual-phase steel, F316, Inconel625
Disc-F347H, F316, Inconel625
Filler-flexible graphite, special materials
Note: Other materials can be selected according to user needs
application scenarios
It is used in solar thermal power generation systems and long-term energy storage systems using molten salt as energy storage medium.
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