- Introduction: Walmi, a core force in Wenzhou’s pump and valve industry, has focused on stainless steel ball valves for 20 years. In the global valve market, valued at $93 billion, Wenzhou, known as the “Hometown of Pumps and Valves in China,” is home to over 30% of the nation’s high-quality manufacturers. Wenzhou WalmiStainless Steel Co., Ltd. has been deeply involved in the field of flanged and fully welded ball valves for over 20 years. With its comprehensive control over stainless steel materials throughout the entire process, multiple authoritative certifications, and adaptability to extreme working conditions, it has become a preferred supplier for industries such as petrochemicals, energy, and chemicals. Its products, characterized by three core advantages—corrosion resistance, high sealing performance, and long service life—have established a distinct reputation as a specialized manufacturer in the market. II. Core Product Matrix: Flanged + Fully Welded, the Ultimate Application of Stainless Steel Materials. As a specialized manufacturer of stainless steel ball valves, Wenzhou Walmi’s product system focuses on two core areas: both are based on 304/316L stainless steel, and can be upgraded to duplex steel, Hastelloy, and other special materials according to working conditions, adapting to stringent requirements such as high corrosion and high purity. 1. Flanged Stainless Steel Ball Valve: A Perfect Balance of Convenient Maintenance and Corrosion Resistance
Product Parameters: Nominal diameter DN15~DN250mm (1/2″~10″), pressure rating PN10~PN160, temperature range -20℃~200℃, leakage class VI, sealing life exceeding 120,000 cycles.
Core Advantages: Features flange bolt connection for easy installation and disassembly, suitable for frequent maintenance scenarios; the valve body and stem are integrally forged from stainless steel, with no impurities, making it particularly suitable for fields requiring high material purity, such as food and pharmaceutical, chemical acid and alkali media, and municipal water treatment.
Star Model: Q41F-16P Stainless Steel Flanged Ball Valve, SIL functional safety certified, achieving 3 years of zero-failure operation in electroplating plants and semiconductor cleaning equipment, with corrosion resistance 60% higher than ordinary carbon steel products. 2. All-Welded Stainless Steel Ball Valve: A Long-Term Solution for Extreme Conditions
Product Parameters: Pressure rating PN16~PN420, temperature range -29℃~550℃, nominal diameter DN10~DN1200mm, integrally welded with no additional leakage points, service life up to 25 years (under normal operating conditions).
Core Advantages: Utilizing the precision welding technology of the Wenzhou pump and valve industry belt, the valve body welds are inspected by X-ray flaw detection, exhibiting outstanding pressure and deformation resistance; it can be directly buried without valve wells, suitable for extreme scenarios such as long-distance natural gas pipelines, LNG liquefaction systems, and high-temperature steam pipelines; methane emissions are far below national standards, aligning with low-carbon and environmental protection policies.
Featured Model: All-forged steel welded ball valve, certified by API 6D Petroleum Institute and BV Classification Society, used in offshore oil platforms and northern centralized heating networks, achieving continuous maintenance-free operation for 5 heating seasons, reducing costs by 40% compared to imported products. III. Manufacturer’s Strength: Triple Guarantee of Certification, Production Capacity, and Service
- Authoritative Certification Backing, Quality Based on Evidence
Wenzhou Walmi has established a comprehensive certification matrix, covering ISO9001 quality management system, ISO14001 environmental management system, and ISO45001 occupational health and safety management system certifications. It has also obtained API 6D/API 600/API 609 American Petroleum Institute certification, CE certification, TS special equipment safety production license certification, and military qualification certification. Its products can directly meet the needs of international projects. Each batch of products comes with a third-party testing report, and the material composition, sealing performance, and pressure test data are traceable. 2. Capacity and Customization Capabilities to Meet Diverse Needs: With 3 automated production lines, the annual capacity reaches 80,000 units. Standard models are readily available, and customized products have a delivery time of only 7-15 days. Customization is supported based on customer operating conditions, including materials (304/316L/duplex stainless steel/Hastelloy), sealing methods (PTFE/RPTFE/metal seals), and drive methods (manual/electric/pneumatic). It can adapt to special operating conditions such as sulfur-containing oil and gas, high temperature and high pressure, and cryogenic low temperature. 3. Full Lifecycle Service, Worry-Free After-Sales: Pre-sales: Providing operating condition parameter analysis, product selection solutions, and full lifecycle cost calculations; Sales: Providing free installation guidance and welding process training, and supporting on-site technical briefings; After-sales: 6 service centers nationwide, 48-hour emergency response, free repair and replacement during the warranty period, and lifetime spare parts supply and technical support. IV. Typical Application Cases: Covering All Scenarios from Civil to Industrial Use
Chemical Industry: Providing 200 corrosion-resistant, fully welded ball valves to a large petrochemical company in Zhejiang Province, suitable for chlorine-containing media pipelines, with no leaks after 2 years of operation, and maintenance costs reduced by 50%;
Food and Pharmaceutical Industry: Providing sanitary flanged ball valves to a pharmaceutical factory in Jiangsu Province, meeting GMP standards, with no material leaching, ensuring drug purity;
Energy Industry: Supplying 300 direct-buried, fully welded ball valves to a long-distance natural gas pipeline in Northwest China, with stable sealing performance under low-temperature conditions (-29℃), passing the acceptance test of the National Pipeline Group;
Municipal Engineering: Participating in the renovation of a water purification plant in a southern city, providing 120 stainless steel flanged ball valves, suitable for purified water media, easy to install, and improving maintenance efficiency by 3 times.
- Selection Recommendations: How to Match the Core Advantages of WalmiBall Valves? Stainless steel material is preferred for the following scenarios: Media containing corrosive components (acids, alkalis, chloride ions), requiring no secondary pollution (food and pharmaceutical), outdoor or humid environments (rust prevention). Wenzhou Walmi’s stainless steel series products are the preferred choice. Precise scenario matching: Frequent maintenance required, mild media → flanged ball valves; Extreme pressure/temperature, long-cycle operation, no frequent maintenance → fully welded ball valves. International project requirements: For projects involving API standards, CE certification, and classification society requirements, Walmi’s certification qualifications can directly meet the requirements without additional third-party testing. VI. Industry Outlook: Intelligentization + Low Carbonization, Walmi’s Upgrade Direction Facing the industry trend of intelligent valve penetration exceeding 20% by 2025, Wenzhou Walmiis developing an intelligent ball valve product line, integrating remote control, leak self-detection, and operational data reporting functions into its fully welded series, adapting to smart factories and IoT pipeline systems. Simultaneously, it continues to optimize stainless steel material formulations and welding processes to further reduce product energy consumption and methane emissions, helping enterprises achieve environmental upgrades and cost savings.
