Three-eccentric metal hard-sealed butterfly valve

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Product overview of three-eccentric metal hard-sealed butterfly valve: Structural type: inclined plate type. Applicable media: water. Operating environment: high pressure. Operating temperature: normal temperature. It can be used for media such as water, sewage, seawater, air, steam, gas, flammable gases, corrosive substances, oils, and food; the maximum operating temperature can reach 600°C. Standard: National standard hard-sealed butterfly valve. Flow direction: Unidirectional. Driving mechanism: Turbine. Components and accessories: Valve body. Purpose: Exhaust. Type (channel position): Straight-through. It exhibits excellent sealing performance in both low-temperature and high-temperature conditions. Two-way sealing: Since the cone angle of the sealing surface is smaller than the friction angle of the sealing material, self-locking is achieved immediately when the butterfly valve is closed in the sealed position, and it can withstand certain reverse pressure impacts. Fire-resistant structure: The all-metal structure possesses inherent fire safety features. Working principle of three-eccentric metal hard-sealed butterfly valves: Applications – The PN10~PN40 three-eccentric metal hard-sealed butterfly valves of types D43H and D343H utilize precise J-shaped elastic sealing rings as well as a three-eccentric, multi-layer metal hard-sealing structure. They are widely used in industrial pipelines in industries such as metallurgy, power generation, petrochemicals, as well as in water supply, drainage, and municipal construction, where they serve to regulate flow rates and cut off fluid flow, for temperatures up to 425°C. Product Features
1. The metal hard-sealed butterfly valve features a triple-eccentric sealing structure. The valve seat and disc experience minimal wear, ensuring an increasingly tight seal over time.
2. The sealing ring is made of stainless steel, combining the advantages of both metal hard sealing and elastic sealing. It offers excellent sealing performance under both low and high temperatures, along with corrosion resistance and a long service life.
3. The sealing surface of the disc is surfacing-welded with cobalt-based hard alloy, making it highly wear-resistant and durable.
4. For larger-sized valves, a truss structure is employed, resulting in high strength, a large flow area, and low flow resistance.
5. This metal hard-sealed butterfly valve has bidirectional sealing capability. Its installation is not restricted by the direction of fluid flow or spatial positioning; it can be installed in any orientation.
6. The actuator can be installed at multiple positions (rotating 90° or 180°), facilitating ease of use for customers.

Standards for Triple-Eccentric Metal Hard-Sealed Butterfly Valves:
Design specifications: GB/T 12238
Structural length: GB/T 12221
Flange connections: GB/T 9113
Testing and inspection: GB/T 13927
Product identification: GB/T 12220

Performance Specifications of Triple-Eccentric Metal Hard-Sealed Butterfly Valves:
Nominal Pressure | Test Pressure (MPa) | Shell Strength Test | Seal Test
0.6 | 0.9 | 0.66
1.0 | 1.5 | 1.1
1.6 | 2.4 | 1.8
2.5 | 3.8 | 2.8
4.0 | 6.0 | 4.4

Test Standards for Triple-Eccentric Metal Hard-Sealed Butterfly Valves:
Nominal Pressure | Test Pressure (MPa) | Shell Strength Test | Seal Test
0.6 | 0.9 | 0.66
1.0 | 1.5 | 1.1
1.6 | 2.4 | 1.8
2.5 | 3.8 | 2.8
4.0 | 6.0 | 4.4

Media and Temperature Compatibility of Triple-Eccentric Metal Hard-Sealed Butterfly Valves:
Product Type | Applicable Media | Applicable Temperature (°C)
Carbon Steel Type (C) | Water, steam, oil, air | ≤300
Alloy Steel Type (I) | Steam, oils | ≤650
Stainless Steel High-Temperature Type (P II) | Steam, oils, acids, seawater | ≤900

Materials Used for Components of Triple-Eccentric Metal Hard-Sealed Butterfly Valves:
Product Type | Component Name | Material
Carbon Steel Type (C) | Valve body, disc, valve shaft, sealing surface | WCB, chromium stainless steel, iron-based alloy
Alloy Steel Type (I) | Valve body, disc, valve shaft, sealing surface | C5, chromium-molybdenum-barium steel, cobalt-based alloy
Stainless Steel High-Temperature Type (P II) | Valve body, disc, valve shaft, sealing surface | High-nickel chromium steel, chromium-nickel-molybdenum-titanium steel, cobalt-tungsten alloy

Structural Diagram of Triple-Eccentric Metal Hard-Sealed Butterfly Valve:
http://www.spske.com/uploads/allimg/160409/1346341I1-0.jpg

Specifications and Dimensions of Triple-Eccentric Metal Hard-Sealed Butterfly Valves:
Nominal Diameter | Nominal Pressure | Main External Dimensions & Connection Sizes (mm) | Weight (Kg)
L | HL | L1 | Do
500 | 0.6 | 431 | 432 | 66 | 316 | 5.5
650 | 0.6 | 146 | 432 | 66 | 7
800 | 0.9 | 491 | 602 | 66 | 9
1000 | 1.6 | 561 | 702 | 66 | 11.5
1250 | 2.5 | 642 | 1034 | 5 | 17
1500 | 4.0 | 702 | 1234 | 5 | 22
2000 | 6.0 | 712 | 1735 | 3 | 39
2500 | 10.0 | 762 | 2803 | 5 | 47
3000 | 16.0 | 833 | 3073 | 5 | 68
4000 | 25.0 | 1026 | 5038 | 5 | 187
4500 | 40.0 | 1147 | 6400 | 316 | 225
5000 | 64.0 | 1277 | 7394 | 400 | 316 | 260
6000 | 100.0 | 1549 | 3449 | 490 | 520 | 383
7000 | 160.0 | 1651 | 0205 | 004 | 520 | 462
8000 | 250.0 | 1901 | 0755 | 004 | 520 | 570
9000 | 400.0 | 2031 | 1606 | 326 | 407 | 701
10000 | 640.0 | 2161 | 3457 | 206 | 408 | 800
12000 | 922 | 2541 | 5207 | 206 | 409 | 907