The Hard-On-Hard Sealing Butterfly Valve features a triple eccentric structure and a metal hard seal design. The valve plate quickly disengages from the valve seat after opening, making it suitable for high-temperature, high-pressure, or abrasive pipelines in industries such as steam, high-temperature gas, oil and gas, petrochemicals, power generation, chemicals, and metallurgy.
Technical Specifications
|
Parameter |
Standard Specification |
Options |
|
Valve Type |
Triple Offset Butterfly Valve |
Customized |
|
Nominal Size |
DN50–DN1200 / 2"–48" |
Up to DN2000 / 80" |
|
Pressure Rating |
ASME Class 150–600 / PN10–PN100 |
Customized |
|
Sealing Type |
Metal-to-Metal / Metal + Graphite |
Customized |
|
Leakage Requirement |
API 598 / ISO 5208 |
Project Specification |
|
Body Material |
WCB / CF8 / CF8M / CF3M |
WC6 / WC9 / Duplex SS |
|
Disc Material |
WCB / CF8M / Alloy Steel |
Duplex SS / Nickel Alloy |
|
Stem Material |
SS410 / F6a / 17-4PH |
Duplex SS / Nickel Alloy |
|
Seat Material |
Stainless Steel / Hard Alloy |
Stellite / Customized |
|
Temperature |
According to Material & Design |
High-Temperature Service |
|
Connection |
Wafer / Lug / Flanged / Butt-Weld |
Customized |
|
Face-to-Face |
API 609 / ASME B16.10 / EN 558 |
Customized |
|
Operation |
Manual / Gear |
Pneumatic / Electric |
|
Testing |
API 598 / ISO 5208 |
TPI Available |
Materials and Configuration
Valve Body and Plate: Supports WCB, WC6, WC9, CF8, CF8M, CF3M, duplex steel, and other alloy materials.
Sealing System: Supports metal hard seals, metal + flexible graphite structures, etc., selected according to temperature, media, and leakage requirements.
Actuation Method: Supports manual, worm gear, pneumatic, and electric operation; can be equipped with limit switches, solenoid valves, and positioners.
Manufacturing and Quality Control
Material Inspection: Confirms the material composition of major pressure-bearing components, valve stems, and sealing materials, and provides corresponding quality certification documents.
Precision Machining: CNC machines key components such as valve body sealing surfaces, valve plates, and valve stems, and performs dimensional inspection.
Sealing Surface Inspection: Inspects the dimensions, hardness, and surface quality of sealing surfaces; PT and other non-destructive testing can be added for special projects.
Pressure Testing: Performs shell and seal testing according to API 598, ISO 5208, or project specifications, and provides test records.
Customization & OEM
Product Customization: Supports customization of caliber, pressure rating, material, connection method, structural length, and sealing configuration.
Actuators: Can be equipped with pneumatic and electric actuators, limit switches, solenoid valves, positioners, and other accessories.
OEM Service: Supports customization of logo, nameplate, product identification, packaging, and technical documents.
Supply & Export
Bulk Supply: Supports sample, small batch, bulk, and project orders; production is arranged according to product specifications and quantity.
Delivery Time: Delivery time is determined based on caliber, material, pressure rating, quantity, and customized configuration; will be confirmed during quotation.
Export Documents: Can provide data sheets, dimension drawings, MTC, test reports, packing lists, and other project documents.
Packaging & Delivery
Critical Component Protection: Flange sealing surfaces, valve seats, and machined surfaces are protected to reduce the risk of collision and contamination during transportation.
Export Wooden Crates: Pallets or export wooden crates are used according to size and weight, with internal securing and moisture protection.
Large-diameter transportation: Large valves are reinforced with bottom supports and marked with the center of gravity and hoisting position to facilitate transportation and on-site loading and unloading.
FAQ
Q: What are the differences between a triple-eccentric butterfly valve and a soft-seal butterfly valve?
A: A triple-eccentric butterfly valve uses a metal hard seal and a frictionless opening and closing structure, making it more suitable for high-temperature, abrasion-prone, and temperature-fluctuation conditions. A soft-seal butterfly valve is more suitable for conventional media within a corresponding temperature range.
Q: Can it be used for steam?
A: Yes. The specific configuration needs to be confirmed based on the steam temperature, pressure, materials, and sealing structure.
Q: How to choose the sealing material?
A: It is mainly determined based on the medium, temperature, pressure, particle content, and leakage requirements. Corresponding selection suggestions can be provided.
Q: Can you provide pneumatic and electric actuators?
A: Yes. The actuator is matched according to the valve size, pressure, operating torque, and control requirements.
Q: Can you provide third-party inspection?
A: We can cooperate with third parties to conduct material, size, pressure testing, and factory acceptance according to project requirements.
Q: Can OEM orders be made?
A: We can support customization of product identification, nameplates, packaging, and some technical configurations, depending on the order requirements.
Q: How to get an accurate quote?
A: It is recommended to provide the diameter, pressure rating, medium, operating temperature, connection method, material, operating method, and quantity to facilitate quick technical confirmation and quotation.
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