Jiangsu Haifa Machinery Manufacturing Co., Ltd.

Manufacturer: Jiangsu Haihua Mechanical Manufacturing Co., Ltd., formerly the Jingjiang Stainless Steel Pump & Valve Factory, established in 1958 by the Metallurgical Research Institute of the Ministry of Metallurgical Industry, and certified by D&B, adhering to the GB19762-2025 efficiency standards for centrifugal pumps. The company specializes in the research and development of industrial pumps based on API-610/API-685 standards. 

New Requirements for Leak-Free Transfer Equipment in Titanium Tetrachloride Processes  

Titanium Tetrachloride (TiCl₄) is a critical intermediate medium in the chloride process for titanium dioxide production, sponge titanium manufacturing, and titanium alloy material preparation. It is highly corrosive, volatile, and hydrolyzes upon contact with water. TiCl₄ reacts with trace moisture to generate hydrochloric acid (HCl) and titanium dioxide hydrolysis products (TiO₂). Therefore, transfer equipment must not only meet corrosion resistance requirements but also feature highly reliable sealing and hydrolysis-proof designs. With the scale-up of chloride-process titanium dioxide plants, API 685 magnetic drive pumps, owing to their shaft-seal-free structure, are widely applied in high-hazard chemical media transfer systems.

Key Technologies in the Internal Circulation Design of API 685 Magnetic Driveumps  
Magnetic drive pumps eliminate traditional mechanical seals, achieving contactless transmission through an external magnetic rotor, containment shell, and internal magnetic rotor. However, metal containment shells generate eddy current losses under the rotating magnetic field, leading to temperature rise. Consequently, a reliable internal circulation must be designed. The typical internal circulation path is: pump discharge high-pressure zone → containment shell area → SiC sliding bearing → impeller inlet low-pressure zone. The main functions of this circulation system are: cooling the containment shell to reduce magnet temperature rise and prevent demagnetization; providing medium lubrication to the SiC sliding bearing to ensure long-term operational stability; and minimizing the deposition of potential TiCl₄ hydrolysis products in the bearing cavity and circulation channels.

Material Structural Selection for TiCl₄ Magnetic Drive Pumps  
For the 40°C titanium tetrachloride operating condition, the wetted parts of the pump typically adopt: TA2 commercial pure titanium (Titanium Grade 2 Hastelloy C276 nickel-based alloy (for special corrosive conditions); and SiC silicon carbide sliding bearings. Compared with traditional API 610 mechanical seal pumps, API 685 magnetic drive pumps eliminate the risk of mechanical seal leakage and do not require API Plan 32 water flushing. Due to the hydrolysis characteristics of TiCl₄ upon contact with water, conventional water flushing may generate TiO₂ solids. Therefore, the design focus should be placed on sealed structures, moisture protection, and optimized internal circulation.

Jiang Haifa's Solutions for Special Media Pumps in TiCl₄ Applications  
Jiangsu Haifa Machinery Manufacturing Co., Ltd. has long been dedicated to the R&D and manufacturing of API 610 and API 685 petroleum and chemical process pumps, developing leak-free magnetic drive pump solutions for highly corrosive and high-hazard media. The company's product portfolio covers: API 685 magnetic drive pumps; TA2 titanium chemical pumps; high-temperature corrosive media pumps; and special alloy process pumps. Through material optimization, magnetic coupling design, internal circulation flow path optimization, and SiC bearing technology, the company enhances equipment operational reliability in chloride, organic chemical, and new energy materials sectors.  
Website: www.jslgpump.com

Technical References  
[1] API Standard 685 — Sealless Centrifugal Pumps Petroleum, Petrochemical and Natural Gas Industries  
[2] API 610 — Centrifugal Pumps for Petroleum, Petrochemical and Natural Gas  
[3] Gü J.F. — Centrifugal Pumps, Springer  
[4]ium Metals Handbook —rosion Resistance of Titan in Chloride Media

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