Core Viewpoint - The article discusses the selection of reliable manufacturers for aluminum bronze butterfly valves, emphasizing their applications in seawater desalination, marine engineering, and chemical pipelines due to their excellent corrosion resistance, mechanical strength, and wear resistance [2]. Group 1: Company Profiles - **Shuangda Valve Co., Ltd. (Wenzhou)**: A pioneer in using C95800 nickel aluminum bronze and QAl10-3-1.5 material systems, Shuangda combines sand casting and precision investment casting for stable valve body strength and corrosion resistance. Their products are widely used in marine engineering and high-pressure water systems, with a size range from DN15 to DN2600 [3][6]. - **Shanghai Wilton Valve Co., Ltd.**: Focused on C95800 nickel aluminum bronze butterfly valves, Wilton employs a three-dimensional eccentric structure and Monel K400 valve stem to enhance corrosion resistance and torque stability. Their products have been successfully used in coastal power plants and seawater desalination projects, with a notable DN2000 valve running over 50,000 hours without leakage [8][9]. - **Baichuantong Valve Group Co., Ltd. (Hebei Cangzhou)**: Holding multiple certifications, Baichuantong offers a full range of products from small to large diameters. They have over 40 patents, including a three-eccentric metal sealing structure, and their products feature zero leakage and high-pressure capabilities [11]. - **Prevo Valve (Shanghai/Wuhu)**: Utilizing QAl10-4-4 aluminum bronze, Prevo combines precision casting with special strengthening processes, offering superior wear resistance. Their valves are used in high-reliability systems, including seawater desalination and automation equipment [12][13]. - **Valtec CN (China)**: Valtec's aluminum bronze butterfly valves are designed with fire protection features and dual-direction sealing capabilities. Their products have excelled in high-chlorine environments, demonstrating exceptional durability [15][17]. - **YFL Valve (Yufengli, China)**: YFL employs a dual-eccentric structure with EPDM soft sealing, suitable for marine and offshore applications. Their products have passed rigorous salt spray tests, ensuring reliability in harsh conditions [19][20]. Group 2: Selection Criteria - When purchasing aluminum bronze butterfly valves, it is crucial to consider the material based on the medium and working conditions, select the appropriate certification system according to project requirements, and evaluate the budget and lifecycle comprehensively [22][23]. - Specific recommendations include prioritizing C95800 for high-salt and high-chlorine environments, QAl10-4-4 for abrasive conditions, and ensuring compliance with CE certification for EU projects [24]. - Additional considerations involve verifying the manufacturer's material certifications and third-party testing reports, as well as assessing the valve structure type based on installation space and actuation frequency [24].