Three-Eccentric Double-Directional Metal Hard-Sealed Butterfly Valve
1. Product Introduction
1. Product IntroductionThis Three-Eccentric Double-Directional Metal Hard-Sealed Butterfly Valve is engineered for harsh working environments in petrochemical, energy & power, metallurgy, and mining industries. It addresses critical pain points of traditional butterfly valves—such as easy seal wear, high leakage, and limited application scope—through its innovative “three-eccentric” structure (non-coaxial layout of valve shaft, disc sealing surface, and valve body sealing surface), combined with metal hard sealing and double-directional sealing technologies.
Key performance highlights:
- Sealing grade: ANSI Class VI (equivalent to GB/T 4213-2008 Class VI) with leakage rate ≤0.0001% of rated flow.
- Precision-polished valve body flow channel: Low flow resistance coefficient, reducing energy consumption for medium transportation.
- Flexible operation modes: Manual (worm gear drive), electric (AC220V/380V), and pneumatic (single/double-acting), adapting to diverse automation requirements.
It is a highly reliable solution for industrial pipeline control, ensuring no leakage under high pressure, no deformation under high temperature, and no failure under corrosion.
2. Core Selling Points
| Advantage Category | Key Benefits |
| Structural Design | Three-eccentric structure + double-directional seal, near-zero leakage |
| Environmental Adaptability | Temp. resistance: -29℃~600℃; Pressure resistance: PN64/Class 600 (suitable for harsh industrial conditions) |
| Durability | Wear-resistant metal hard seal, service life over 100,000 operation cycles |
| Media Compatibility | Fits complex industrial media: water, steam, acid-base solutions, mineral slurry, pulverized coal |
3. Core Specification Table
| Parameter Category | Specifications |
| Nominal Diameter (DN) | DN50 – DN2000 (customizable for larger sizes upon request) |
| Nominal Pressure | PN16/Class 150 ~ PN64/Class 600 |
| Operating Temperature | -29℃ ~ 425℃ (standard version); -29℃ ~ 600℃ (custom high-temperature version) |
| Valve Body Material | Optional: Cast Iron (HT250), Cast Steel (WCB), Stainless Steel (304/316), Duplex Steel (2205) |
| Sealing Surface Material | Optional: Cemented Carbide (WC), Stainless Steel (304/316), Cobalt-Based Alloy (Stellite) |
| Operation Mode | Manual (Worm Gear), Electric, Pneumatic |
| Applicable Media | Water, Steam, Industrial Oil, Acid-Base Solutions, Mineral Slurry, Pulverized Coal |
4. Applicable Industries & Scenarios
| Specific Application Scenarios | |
| Petrochemical | Crude oil transportation pipelines, refinery reactor inlets/outlets, acid-base storage tank connections |
| Energy & Power | Thermal/nuclear power plant steam pipelines, desulfurization & denitrification systems, gas turbine pipelines |
| Metallurgy & Mining | Mineral slurry transportation pipelines, blast furnace gas pipelines, smelting wastewater pipelines |
| Water Treatment | Seawater desalination high-pressure pipelines, municipal sewage circulation systems |
5. Product Advantage Comparison
| Industry | Specific Application Scenarios |
| Petrochemical | Crude oil transportation pipelines, refinery reactor inlets/outlets, acid-base storage tank connections |
| Energy & Power | Thermal/nuclear power plant steam pipelines, desulfurization & denitrification systems, gas turbine pipelines |
| Metallurgy & Mining | Mineral slurry transportation pipelines, blast furnace gas pipelines, smelting wastewater pipelines |
| Water Treatment | Seawater desalination high-pressure pipelines, municipal sewage circulation systems |
| Comparison Dimension | This Product (Three-Eccentric Double-Directional Metal Hard-Sealed Butterfly Valve) | Traditional Soft-Sealed Butterfly Valve | Single-Eccentric Hard-Sealed Butterfly Valve |
| Sealing Performance | ANSI Class VI (near-zero leakage), double-directional seal | ANSI Class IV (high leakage), single-directional seal | ANSI Class V (medium leakage), single-directional seal |
| Temp & Pressure Resistance | -29℃~600℃, PN64/Class 600 (harsh condition compatible) | -10℃~120℃, ≤PN16/Class 150 (normal temp/low pressure only) | -20℃~300℃, ≤PN25/Class 250 (prone to failure in high temp/pressure) |
| Service Life | >100,000 cycles, long maintenance intervals | 10,000-20,000 cycles, frequent seal replacement | 30,000-50,000 cycles, easy seal scratching |
| Long-Term Operating Cost | Low maintenance frequency, low comprehensive cost | High shutdown maintenance cost (frequent seal changes) | High labor & part costs (frequent repairs) |
6. Contact & Inquiry
For customized solutions, quotations, or samples, please contact us via:
- Online Chat (24/7 Support)
- Email: [email protected]
We offer tailor-made solutions for non-standard requirements (e.g., larger DN, special materials) to meet your specific industrial needs.