Hastelloy G30 butterfly valves are mainly applicable to the following industries:
Hastelloy G30 butterfly valves are widely utilized in numerous industries that demand exceptionally high material corrosion resistance, thanks to their outstanding corrosion - resistant properties.
Chemical Industry
Phosphoric Acid Production and Processing: In the phosphoric acid production process, a variety of highly corrosive media are present. Hastelloy G30 butterfly valves can effectively withstand the corrosion of phosphoric acid and its related media, ensuring the stable operation of the production process.
Nitric Acid Processing Industry: Nitric acid is highly oxidizing and extremely corrosive to metal materials. Hastelloy G30 butterfly valves can be employed in this industry to control the flow and pressure of nitric acid, preventing medium leakage that could harm equipment and the environment.
Sulfuric Acid Production and Processing: Sulfuric acid is a common strong acid with a strong corrosive effect on ordinary metal materials. Hastelloy G30 butterfly valves can endure the corrosion of sulfuric acid during its production, storage, and transportation, ensuring the safe operation of equipment.
Petrochemical Industry
Oil Refining Process: In the oil refining process, crude oil contains various corrosive components such as sulfides and chlorides. Hastelloy G30 butterfly valves can be used in various pipeline systems within oil refining units to control the flow of oil products and prevent corrosive media from damaging valves and pipelines.
Chemical Equipment Supporting: Petrochemical production requires a large number of chemical equipment, including reactors, heat exchangers, and towers. Hastelloy G30 butterfly valves can serve as supporting valves for these equipment, ensuring their safe and reliable operation.
Nuclear Energy Industry
Nuclear Fuel Processing: During the production, processing, and post - processing of nuclear fuel, radioactive substances and highly corrosive media are encountered. Hastelloy G30 butterfly valves, with their excellent corrosion resistance and sealing properties, can meet the stringent requirements of nuclear fuel processing and prevent the leakage of radioactive substances.
Nuclear Waste Treatment: Nuclear waste is highly radioactive and corrosive, and the requirements for processing equipment are extremely strict. Hastelloy G30 butterfly valves can be used in the storage, transportation, and treatment systems of nuclear waste to ensure its safe disposal.
Marine Engineering Field
Seawater Desalination: Seawater contains a large amount of salt and other corrosive substances, which are highly corrosive to metal materials. Hastelloy G30 butterfly valves can be used to control the flow and pressure of seawater in seawater desalination equipment, improving the equipment's corrosion resistance and service life.
Offshore Platform Equipment: Offshore platforms are exposed to harsh marine environments and face multiple challenges such as seawater corrosion and wave impact. Hastelloy G30 butterfly valves can be used in various pipeline systems on offshore platforms, such as fire protection systems and water supply and drainage systems, to ensure the normal operation of the platform.
Special Requirements for the Sealing Structure of Hastelloy G30 Butterfly Valves Under Different Working Conditions
High - Temperature and High - Pressure Working Conditions
Sealing Material Selection: Under high - temperature and high - pressure environments, sealing materials need to have good high - temperature resistance and elasticity to maintain sealing performance at elevated temperatures. High - temperature graphite and metal spiral wound gaskets are commonly used as sealing materials. These materials can maintain stable chemical and physical properties at high temperatures, effectively preventing medium leakage.
Sealing Structure Design: To improve sealing performance, double - eccentric or triple - eccentric sealing structures can be employed. The double - eccentric seal structure allows the butterfly plate to quickly detach from the sealing surface during opening and closing, reducing friction and wear. The triple - eccentric seal structure, further optimized on the basis of the double - eccentricity, ensures the sealing surface is completely detached when fully open, further reducing friction and improving sealing performance and service life.
Thermal Compensation Measures: Due to thermal expansion of materials in high - temperature environments, the sealing gap may change. Therefore, thermal compensation devices such as elastic sealing rings and bellows need to be set up in the sealing structure to compensate for dimensional changes caused by thermal expansion and ensure seal reliability.
Strong Corrosive Medium Working Conditions
Sealing Surface Material Selection: Strong corrosive media cause serious corrosion to the sealing surface, so materials with excellent corrosion resistance must be selected for the sealing surface. Hastelloy G30 itself has good corrosion resistance and can be used as a sealing surface material. Additionally, surface coating technology can apply a corrosion - resistant coating like polytetrafluoroethylene (PTFE) or ceramic coating to the sealing surface to further enhance its corrosion resistance.
Sealing Structure Form: A structure combining metal - to - metal sealing and soft sealing is adopted. Metal - to - metal seals provide higher sealing pressure and reliability, while soft seals act as an auxiliary sealing layer between metal sealing surfaces, further improving sealing performance. For example, a layer of soft sealing gasket is set on the metal sealing surface. When the valve is closed, the soft sealing gasket is compressed to form an additional sealing barrier.
Preventing Medium Crystallization: Some highly corrosive media tend to crystallize when the temperature drops, and crystals may get stuck on the sealing surface, preventing the valve from opening and closing normally. To prevent medium crystallization, a heating device such as an electric heating belt or steam tracing can be installed in the sealing structure to maintain the medium's temperature during flow and prevent crystallization.
