Your Leading Molten Salt Valve Manufacturer in China
JiangHeng molten salt valve is a special valve specially designed for high-temperature molten media, which can maintain excellent performance under higher temperature (200°C-600°C) operating conditions. Its core features are high temperature resistance and strong corrosion resistance, making it suitable for harsh working conditions such as metal smelting, glass production and high-temperature chemical industry. Lava valves play an irreplaceable role in their processes and are essential equipment to ensure the safe and precise control of high-temperature media.
According to your requirements, JiangHeng can also customize special molten salt valves containing rare materials, sizes, sealing surface materials, driving methods, pressure sizes, colors and other requirements.
Whether you choose a molten salt valve for industrial or general use. JiangHeng is your best supplier. We offer competitive prices while also guaranteeing quality.
FAQ-Molten Salt Valve
Molten salt valves are special valves designed for high-temperature molten salts (such as nitrates, fluoride salts, etc.). They can withstand temperatures ranging from 400°C to 800°C and are resistant to thermal shock and corrosion. They are mainly used in concentrated solar power generation (CSP), molten salt energy storage systems, nuclear reactor cooling, chemical high-temperature reaction devices , etc. to control molten salt flow, pressure regulation, and system isolation.
Selection needs to focus on:
- Temperature range (maximum temperature resistance and thermal cycle stability)
- Medium characteristics (differences in corrosiveness of nitrates, fluoride salts, etc.)
- Pressure level (normal pressure to 10MPa high pressure system)
- Valve type (stop valve, gate valve, plug valve, etc.)
- It is recommended to select a valve that supports preload adjustment to cope with thermal expansion deformation.
Core materials include:
- Nickel-based alloys (such as Inconel 625, Hastelloy C276, resistant to chloride corrosion)
- Stainless steel 316L (suitable for nitrate medium and low temperature range)
- Through surface nitriding treatment , duplex steel welding process and multi-layer sealing structure , the life of the valve in the molten salt environment is significantly improved.
In tower solar thermal power generation (CSP) , molten salt valves are used for:
- Controlled circulation of molten salt between the receiver and the storage tank (temperature up to 565°C)
- Regulating the flow of molten salt in steam generators to stabilize power generation
- It must comply with ASME B16.34 standards and have zero leakage requirements.
- Preheating treatment : Avoid thermal stress cracking caused by cold start
- Sealing surface protection : Clean the pipe before installation to prevent scratches by hard particles
- Hot tightening of bolts : recalibration of bolt torque is required after high temperature operation
- Insulation design : The valve and the pipeline should be wrapped with insulation to reduce heat loss
- Valve stem stuck : molten salt crystal accumulation or uneven thermal expansion
- Seal failure: material creep or corrosion peeling due to high temperature
Solução:
- After shutdown, use high-pressure steam or inert gas to purge the valve cavity
- Replace the sealing ring with a high temperature resistant alloy (such as Inconel 718)
- Double gate design to compensate for thermal deformation
Core Certifications :
- ASME B16.34 (High Temperature Valves Design Specification)
- ISO 15848 (leakage level test)
- NACE MR0175 (anti-sulfidation corrosion certification)
- Verification method : Suppliers are required to provide high temperature fatigue test reports , metallographic analysis certificates and third-party salt spray corrosion test data
Selection criteria:
- Material technology : Do you have mastered the nickel-based alloy precision casting process?
- Industry experience : Are there any successful cases of CSP or nuclear power projects?
- Customization capability : support non-standard design (such as large-diameter molten salt butterfly valve)
- After-sales service : Provide remote monitoring and fast spare parts replacement services