The Double Eccentric Butterfly Valve reduces friction between the butterfly plate and seat through its double eccentric structure, thereby lowering operating torque and seal wear. It is suitable for water supply, sewage treatment, power generation, oil and gas, chemical, and industrial pipelines, and can be used with media such as water, air, gas, and oil.
Technical Parameters
|
Parameter |
Standard Specification |
Custom Options |
|
Valve Type |
Double Eccentric Butterfly Valve |
Fire-Safe / High-Temperature |
|
Nominal Size |
DN50–DN1200 (2"–48") |
Up to DN2000 (80") |
|
Pressure Rating |
PN10 / PN16 / Class 150 |
PN25 / PN40 / Class 300 |
|
Body Material |
Ductile Iron / WCB / CF8 / CF8M |
Duplex SS / Other Alloys |
|
Disc Material |
SS304 / SS316 / Ductile Iron |
Duplex SS / Coated Steel |
|
Seat Material |
EPDM / NBR / PTFE |
Metal Seat / FKM |
|
Connection Type |
Wafer / Lug / Flanged |
Customized |
|
Connection Standard |
EN / ASME / JIS |
GB / GOST |
|
Design Standard |
EN 593 / API 609 |
ISO 5752 / Customized |
|
Testing Standard |
API 598 / EN 12266-1 |
ISO 5208 |
|
Operation |
Gear / Pneumatic / Electric |
Hydraulic / Smart Control |
|
Temperature |
According to Material & Seat |
Customized |
|
Medium |
Water / Air / Gas / Oil |
Other Media |
|
Coating |
Epoxy / FBE |
Customized |
Material & Components
Valve Body: Ductile iron is suitable for conventional water systems; WCB is suitable for industrial applications; stainless steel is suitable for corrosive media.
Butterfly Plate: Optional materials include 304, 316, duplex stainless steel, and coated steel, configured according to corrosion resistance and media requirements.
Valve Seat: EPDM is suitable for water media; NBR is suitable for oil media; PTFE is suitable for chemical media; metal seals are suitable for specific high-temperature conditions.
Coating: Epoxy or FBE coating is available, determined according to environmental and corrosion protection requirements.
Manufacturing Process
Standard Process: Raw material inspection → Casting/Forging → CNC Machining → Assembly → Pressure Testing → Functional Testing → Surface Treatment → Final Inspection → Packaging.
Critical Controls: Focus on controlling the dimensions and assembly accuracy of the valve body, butterfly plate, and sealing components to ensure the product conforms to drawings and procurement requirements.
Quality Control & Testing
Raw Material Inspection: Verify material grades, furnace batch numbers, and material certificates. Critical pressure-bearing components can be material verified according to order requirements.
Dimensional Inspection: Inspect the valve body, disc, flange, and critical dimensions to ensure connection and assembly accuracy.
Pressure Testing: Perform shell, seal, and leakage tests according to applicable standards and maintain test records.
Factory Inspection: Inspect the appearance, dimensions, markings, opening and closing performance, test records, and packaging condition.
Connection and Actuation
Connection Methods: Supports Wafer, Lug, and Flanged structures, compatible with different flange standards.
Actuation Methods: Supports Gear, Pneumatic, and Electric actuators, configurable according to operating torque, control method, and failure location.
Customization & OEM/ODM
Product Customization: Supports customization of dimensions, pressure rating, materials, seals, connection standards, actuators, and surface treatments.
OEM/ODM: Supports logo, nameplate, product identification, packaging, and Private Label, suitable for distributors and brand customers.
Manufacturing Capacity & Traceability
Precision Machining: Valve bodies, butterfly plates, and key components are machined using CNC lathes and machining centers, and critical dimensions are inspected.
Batch Traceability: Pressure-bearing components and key parts are traceable by furnace number and batch, and material certificates and testing records are provided.
Stable Supply: Standard products typically take 20–30 days to produce; specific delivery dates are confirmed based on specifications, quantity, and customization requirements.
Warranty & After-Sales
Quality Assurance: A quality guarantee as stipulated in the contract is provided; the specific period and scope of responsibility are subject to the contract between both parties.
Technical Support: Technical support is provided for product selection, parameter confirmation, and installation and commissioning.
FAQ
Q: What are the MOQ and delivery time?
A: Standard products typically do not have strict MOQ limits; specific details depend on specifications, quantity, and customization requirements. Standard orders usually require a 20-30 day production cycle.
Q: Can you provide MTC and test reports?
A: Yes. We can provide EN 10204 3.1 MTC, pressure test, and related inspection documents according to order requirements.
Q: Can you replace valves from other brands?
A: Compatibility assessments can be performed based on the original valve's face-to-face, flange size, pressure rating, material, actuator interface, and actual operating conditions.
Q: Can you customize actuators?
A: Yes. Appropriate actuators can be configured based on operating torque, control method, valve size, and failure location.
Q: Do you support sample purchases?
A: Sample supply methods and related costs can be confirmed based on product specifications and purchasing requirements.
Q: How can I get a quote?
A: You can select a model and get a quote by providing Valve Size, Pressure Rating, Medium, Temperature, Material, Connection Standard, Actuator, and Quantity.
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