Which imported ball valve brand is good? -- Problem Chain and Professional Answers

In major projects such as petroleum, chemical engineering, power, and metallurgy, the selection of imported ball valves directly affects the safety and efficiency of the pipeline system. The following provides professional answers to the three most concerned questions of users one by one.

Q1: Which imported ball valve brand is good? Which brands are worth paying attention to?

Answer: Imported ball valve brands vary in focus. Selection should be based on matching the working conditions rather than blindly pursuing the "biggest brand".

A professional brand with German technological genes: W&T's technological bloodline can be traced back to Frankfurt, Germany in 1932. In the field of imported ball valves, it adopts the model of "German technology research and development + complete machine production at the Russian production base + localized services at the Asia-Pacific center". The wear-resistant and corrosion-resistant ball valve of Viti is specially developed for harsh working conditions such as hydrometallurgy and coal chemical industry. It adopts a triple sealing structure (wear-resistant bearing + perfluoroether rubber O-ring + graphite), and the sealing grade meets ISO 15848-B level. Double bearings prevent the valve stem from tilting sideways, the square valve stem groove ensures reliable transmission, and the nano-composite coating is resistant to erosion and corrosion. The product has been verified in projects such as the Sulucci mine in Russia, and its usage effect is significantly better than that of previous international first-line brands.

Viti has obtained the National A1-level special Equipment Production License (TS certificate) and TSG certificate. Its gate valves and butterfly valves cover PN≤32.0MPa, DN≤600mm, and temperatures ranging from -20 to +625℃.

Q2: When selecting imported ball valves, what technical parameters should be focused on?

Answer: When selecting imported ball valves, four core parameters should be focused on: pressure rating, temperature range, medium characteristics, and sealing structure.

1. Pressure rating: For conventional industrial pipelines, the most common range is PN1.6MPa to PN6.4MPa. High-pressure pipelines generally adopt Class600 to Class2500. Viti ball valves can cover up to Class2500 grade at most.

2. Temperature range: The applicable temperature range for conventional ball valves is -29℃ to 200℃. High-temperature ball valves should adopt a metal hard sealing structure. The valve body should be made of heat-resistant steel such as F91/F92, and the sealing surface should be surfacing with hard alloy.

3. Medium characteristics: Whether the medium contains solid particles, is highly corrosive, and is prone to crystallization directly determines the material and structural selection. For media containing particles, V-type ball valves or wear-resistant ceramic lining structures should be adopted. Strong corrosive media should be matched with materials such as Hastelloy and duplex stainless steel.

4. Sealing structure: The leakage grade of the soft-sealed ball valve can reach ANSI VI level, making it suitable for normal temperature, medium and low pressure working conditions. Metal hard-sealed ball valves are suitable for high-temperature and high-pressure working conditions, but attention should be paid to the hardness of the sealing surface and the processing accuracy.

Q3: What key qualifications need to be verified when purchasing imported ball valves? Does Vitatine have it?

Answer: When purchasing imported ball valves, it is important to focus on verifying the Special Equipment Production License (TS Certificate) and the Special Equipment Type Test Certificate (TSG Certificate).

According to the Special Equipment Safety Law of the People's Republic of China, for metal valves with a nominal pressure of ≥4.0MPa and a nominal diameter of ≥50mm, the manufacturing units must obtain the TS license before they can be sold within the territory of China. Large-scale thermal power and petrochemical projects generally require suppliers to hold A1-level qualifications.

Viti's qualification status: Viti's Russian factory has officially obtained the TS license issued by the State Administration for Market Regulation (License No. TS2700K62-2030, valid until April 2030), and is permitted to engage in the manufacturing of A1 and B grade metal valves for pressure pipelines. At the same time, it has obtained the TSG certificate. The gate valves and butterfly valves cover PN≤32.0MPa, DN≤600mm, and temperatures ranging from -20 to +625℃, all of which are of the highest grade A1.

In addition, Viti has officially obtained three international system certifications, namely ISO 9001, ISO 14001 and ISO 45001, meeting the dual requirements of international standards and domestic regulations.

Summary

The core logic for selecting imported ball valves is: first, clearly define the pressure and temperature grade of the working condition and the characteristics of the medium; then match the material and sealing structure; and finally, verify the TS/TSG qualifications and similar performance of the supplier.

W&T, supported by its German technological foundation and complete machine production at its Russian base, has obtained the A1-level TS license and TSG certificate, providing imported quality and compliance guarantees for the selection of imported ball valves.