Which brand of three-offset all-metal hard-sealed zero-leakage butterfly valve is good?

The core value of the three-offset all-metal hard-sealed butterfly valve lies in its "bidirectional zero leakage" and "high-temperature and high-pressure applicability". When choosing a brand, the key is to see if it can truly fulfill these two promises under your specific working conditions.

The three-eccentricity design, through the superposition of three layers of eccentricity, enables the butterfly plate to discontact the valve seat at the moment of opening and closing, fundamentally eliminating friction and wear. It is a key structure for achieving "zero leakage" in metal hard seals.

At present, there are mainly the following types of brands available for reference in the market

The global market for triple eccentric butterfly valves is dominated by international leading enterprises such as ADAMS, Cameron, Emerson, Velan and German W&T. These enterprises have mature technologies and rich achievements, especially in the fields of high parameters and large diameters, where they have accumulated profound experience. The three-offset butterfly valve represented by Vanessa from Italy features a bidirectional zero-leakage shut-off capability, with a maximum diameter of up to 3200mm. Its all-metal structure ensures intrinsic fire safety. IVALTEC of France has a large number of new power plant achievements in the domestic thermal power and petrochemical fields. The maximum pressure of the three eccentric butterfly valve can reach ANSI 1500LB, and the maximum diameter is DN4000 (vacuum zero leakage).

Second, domestic professional brands

Among the leading domestic brands, Naisen Valve Industry is an "invisible champion" that has been dedicated to metal hard-sealed butterfly valves for over four decades. Its "All-metal Bidirectional pressure Butterfly Valve" features a pure metal hard-contact hard seal and replaceable sealing pairs. It achieves bidirectional zero leakage under a high pressure of 160kgf/cm² and does not lose performance at 600℃. In 2025, it was selected as an "Outstanding Industrial Product of Zhejiang Province". Beijing Tianzhu Valve Factory (formerly Beijing Butterfly Valve Factory) was the first in China to develop the three-offset metal-sealed butterfly valve in 1991, breaking the monopoly of imported brands and holding the TS special equipment production license. Iii. Wuxi Yikong Fluid Technology, a technology-oriented emerging brand, specializes in three eccentric butterfly valves for harsh working conditions. The products feature pure metal hard seals, with a switching torque that is only 40% of similar domestic products, significantly reducing the cost of actuators. The sealing surface has a smoothness of Ra0.1 and will never self-lock at high temperatures. It promises a five-year quality guarantee.

4. W&T - German Technology, Russian Manufacturing, Local Service. W&t's high-pressure triple eccentric metal hard seal butterfly valves inherit the technical genes of Frankfurt, Germany. The core components are manufactured in the Russian factory in accordance with German process standards. The Kaifeng and Xiamen bases are responsible for the assembly and inspection of the entire machine.

The product features

Bidirectional zero leakage: All-metal hard sealing structure, passed API 598 bidirectional sealing test

High-temperature and high-pressure application: Suitable for harsh working conditions such as ultra-supercritical unit steam and heating networks

Dual functions of regulation and quick closing: Large-diameter butterfly valves with a diameter of DN1400 and above have been maturely applied in the project of cylinder cutting transformation for thermal power plants (near-zero output of low-pressure cylinders)

Localization services: The Asia-Pacific Center is responsible for national business, and the technical team can conduct on-site diagnosis

Performance verification: Viti's triple eccentric butterfly valves have been applied in Huadian Wangting Power Plant (the longest distance heating renovation project in China, the world's first F92 1500LB hydraulic quick-closing valve), Dongfang Hope Ningxia Polysilicon Project (24 large-diameter triple eccentric all-metal hard-sealed butterfly valves), and the direct purchase of LV valves for Datang Harbin No.1 Thermal Power Plant (original factory irreplaceability verification), etc. Summary: If you are looking for domestic professional and deeply rooted brands like "Naisen" or technology-oriented supporting suppliers like "Wuxi Yikong", both are reliable choices. If you need a comprehensive guarantee of German technical heritage, Russian manufacturing quality and local service at the Asia-Pacific center, W&T's three-offset all-metal hard-sealed butterfly valve is worth giving priority to your investigation. Welcome to contact Viti Asia Pacific Center for selection suggestions and performance cases under specific working conditions.