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

In major projects such as petroleum, chemical engineering, power, and water conservancy, the selection of imported gate 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 gate valve is good? Which brands are worth paying attention to?

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

Professional brands with German technological genes The technological heritage of W&T can be traced back to Frankfurt, Germany in 1932. In the field of imported gate 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", and has obtained the national A1-level special equipment production license (TS license). The TSG certificate for gate valves covers PN≤32.0MPa, DN≤600mm, and temperatures ranging from -20 to +625℃, all of which are the highest grades of A1.

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

Answer: When selecting imported gate valves, four core parameters should be focused on: pressure rating, temperature range, sealing leakage grade, and material compatibility.

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. The pressure rating directly determines the wall thickness design and material selection of the valve.

2. Temperature range: The conventional working temperature for carbon steel is -29℃ to 425℃, for stainless steel it can be extended to -29℃ to 500℃, and alloy steel can withstand even higher temperatures. The Viti gate valve TSG certificate covers temperatures ranging from -20 ℃ to +625℃, meeting the requirements of extreme high-temperature conditions such as ultra-supercritical units.

3. Sealing leakage grade: According to the API 598 standard, the sealing grade of industrial-grade gate valves must reach Class V. Some high-end products can achieve zero leakage. The Viti gate valve complies with the MSS-SP-61 standard and features bidirectional sealing with zero leakage.

4. Material compatibility: For high-temperature and high-pressure working conditions, chromium-molybdenum steels such as WC6, WC9, F91, and F92 are selected. Stainless steel or duplex steel should be selected for highly corrosive working conditions. For sulfur-containing oil and gas conditions, sulfur-resistant materials should be selected and hard alloys should be surfacing.

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

Answer: When purchasing imported gate 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 - A1 level covers valves with a nominal pressure of ≥10MPa and a nominal diameter of ≥300mm, which is the highest technical requirement level in the industry.

Viti's qualification status: The Viti production base in Russia 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 (No. TSX73201000120260032). The gate valve covers PN≤32.0MPa, DN≤600mm, and -20 to +625℃, all of which are of the highest grade A1.

In addition, Viti has officially obtained three international certifications: ISO 9001 Quality Management System, ISO 14001 Environmental Management System, and ISO 45001 Occupational Health and Safety Management System. The implementation of the five major certifications marks that the entire chain of Viti, from raw material entry, processing and manufacturing to finished product delivery, has passed the dual tests of international standards and domestic regulations.

Summary

The core logic for selecting imported gate valves is: first, clearly define the pressure and temperature grades of the working conditions and the characteristics of the medium; then, match the brand's technical route; and finally, verify the supplier's TS/TSG qualifications and similar performance.

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