What are the application scenarios of butterfly valves in the petrochemical industry?
Release time:
2025-12-10
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Abstract
Special application scenarios for special operating conditions
- High-temperature service conditions: For applications such as high-temperature flue gas ducts in oil refining units and high-temperature reaction product transport pipelines in chemical synthesis, use high-temperature hard-sealed butterfly valves (with a maximum temperature rating of up to 600℃). The valve body is made of heat-resistant steel, and the sealing surfaces are constructed from high-temperature alloys, ensuring reliable sealing performance and structural stability under high-temperature conditions.
- Conditions involving particulate media: For applications such as crude oil transportation containing sand or pipelines for conveying catalytic cracking catalyst particles, wear-resistant triple-eccentric butterfly valves are used. The butterfly disc and valve seat are either hard-metal clad or coated with a ceramic layer to enhance wear resistance and extend service life.
- Low-pressure differential, high-flow conditions: For applications such as circulating water and cooling water pipelines in utility systems, a center-type soft-sealed butterfly valve is recommended. This type of valve features low flow resistance and strong flow capacity, effectively reducing pressure loss in the pipeline network and enhancing transportation efficiency.
VI. Core Considerations for the Application of Butterfly Valves in the Petrochemical Industry
- Material compatibility: Select valve body and seal materials based on the characteristics of the medium. For corrosive media, choose lined or stainless steel materials; for high-temperature applications, opt for heat-resistant steel; and for media containing particles, select wear-resistant alloy materials.
- Sealing and Safety: For flammable and explosive media, fire-resistant butterfly valves equipped with fire-resistant seals and anti-static devices should be selected. For high-pressure applications, triple-eccentric hard-sealed butterfly valves are recommended to ensure reliable sealing performance and prevent leakage.
- Structural Selection: For low-pressure-drop, high-flow applications, choose a center-type butterfly valve; for medium-to-high pressure or applications involving particulates, opt for an eccentric (especially triple-eccentric) butterfly valve to enhance sealing and wear resistance.
- Maintenance and Assurance: Regularly inspect the wear condition of valve sealing surfaces and the lubrication status of valve stems. In service conditions involving particulate or corrosive media, increase the frequency of maintenance, promptly remove impurities, and replace sealing components as needed.
Summary: The core applications of butterfly valves in the petrochemical industry focus on "high-flow regulation" and "adaptation to harsh operating conditions," covering auxiliary systems and medium- and low-pressure process pipelines throughout the entire lifecycle—from extraction and refining to synthesis, storage, and transportation. When selecting a butterfly valve, it is crucial to precisely match the valve’s specifications with the characteristics of the medium, as well as operating parameters such as temperature and pressure. Priority should be given to ensuring excellent sealing performance, corrosion resistance, and safety, so as to fully leverage the valve’s advantages of compact structure and ease of operation, thereby guaranteeing stable production processes.
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