Reliable Butterfly Valve Solutions for Industrial Flow Control
Butterfly valves use a rotating disc design to regulate or isolate fluid flow in pipeline systems. With concentric and eccentric structures, various sealing options and flexible connection designs, they are widely used in water treatment, chemical, petroleum, power, HVAC and industrial applications requiring efficient flow control and reliable operation.
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![Concentric Butterfly Valve]()
Concentric Butterfly ValveA Concentric Butterfly Valve is an industrial isolation valve featuring a centered stem and disc design. It is widely used for flow control and shut-off applications in water treatment, HVAC, industrial process, and utility pipeline...view more -
![Double Eccentric Butterfly Valve]()
Double Eccentric Butterfly ValveThe 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...view more -
![Triple-Offset Butterfly Valve]()
Triple-Offset Butterfly ValveThe Triple-Offset Butterfly Valve features a triple-offset structure and a hard metal seal, reducing friction between the valve disc and seat during opening and closing, and minimizing wear on the sealing surface. It is widely used in...view more -
![Hard-On-Hard Sealing Butterfly Valve]()
Hard-On-Hard Sealing Butterfly ValveThe 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,...view more
Technical Specifications
|
Parameter |
Technical Details & Industry Standards |
|
Design & Manufacture |
API 609 (Cat. A & B), EN 593, MSS SP-67, ASME B16.34 |
|
Size Range |
DN50 to DN2000 (2" to 80") |
|
Pressure Rating |
Class 150 to Class 900 / PN10 to PN150 |
|
Temperature Range |
-46°C to 600°C (Soft Seat: -20°C to 180°C; Metal Seat: up to 600°C) |
|
Testing Standard |
100% Tested per API 598 / ISO 5208 (Zero Leakage Rate A) |
|
Face to Face |
API 609, ISO 5752, EN 558 |
|
Fire Safe Standard |
API 607 / ISO 10497 Certified (For Triple Offset Series) |
|
End Connections |
Wafer, Lug, Double Flanged, Butt-Weld |
Key Design Features
|
Design Feature |
Technical Options & Standards |
Engineering & Operational Benefits |
|
Triple & Double Offset Geometry |
Concentric, Double Offset, and Triple Offset (API 609 Category B) structures |
Eliminates seat friction during opening/closing via 3D eccentric positioning, dramatically reducing operating torque and extending sealing life in high-cycle loops. |
|
Fire-Safe & Low Emission Protection |
Certified per API 607 / ISO 10497 with API 622 / ISO 15848-1 packing options |
Ensures critical containment during plant fires and prevents fugitive VOC emissions in hazardous chemical or hydrocarbon refining environments. |
|
Bi-Directional Zero-Leakage |
API 598 / ISO 5208 Rate A (SS316 + Graphite Laminated / Stellite Metal Seat) |
Achieves reliable zero-leakage tight shut-off in both flow directions under extreme pressure and temperature conditions (-46°C to 600°C). |
Product Range
Concentric Butterfly Valve
A common butterfly valve design with centered stem and disc, suitable for general fluid control applications.
Double Eccentric Butterfly Valve
The offset shaft design reduces friction between the disc and seat, improving sealing performance and service life.
Triple Offset Butterfly Valve
The three-offset structure minimizes friction and provides reliable shut-off performance for demanding industrial applications.
Hard-On-Hard Sealing Butterfly Valve
Designed with metal sealing technology, it is suitable for high-temperature, high-pressure and harsh operating conditions.
Material & Sealing Selection Guide
|
Operating Condition |
Recommended Material / Sealing Solution |
Application Examples |
|
Water & General Fluid Systems |
Cast Iron / Carbon Steel with EPDM Seat |
Water treatment, HVAC, general pipeline systems |
|
Chemical Media |
Stainless Steel with PTFE or Viton Seat |
Chemical processing and corrosive environments |
|
High Temperature Service |
Alloy Steel / Stainless Steel with Metal Seat |
Steam, power generation and high-temperature systems |
|
General Industrial Applications |
Carbon Steel / Stainless Steel with NBR or EPDM Seat |
Industrial fluid control systems |
Applications
Water & Wastewater Treatment
Butterfly valves provide efficient flow control for water supply, treatment processes and industrial water systems.
Petroleum Industry
Used in pipeline systems for oil transportation, processing equipment and fluid isolation applications.
Chemical Industry
Suitable for controlling different chemical media with appropriate material and sealing selection.
Electric Power Industry
Applied in cooling systems, process pipelines and industrial fluid control systems.
HVAC Systems
Used for regulating chilled water and heating systems in commercial and industrial facilities.
Fire Protection Systems
Applied in sprinkler and fire water systems requiring reliable flow control.
With more than 20 years of valve manufacturing experience, PORO operates a 23,186㎡ production facility and provides integrated valve manufacturing and supply capability.
Long-term experience in industrial valve production since 1997
Manufacturing capability covering multiple valve categories
Material options including CS, LTCS, SS, DSS and Alloy Steel
Production according to international standards including ANSI, DIN, BS, JIS and GB
Export experience serving customers across multiple global markets
Quality Assurance & Specialized Testing:
100% Pressure & Seat Testing:
Every butterfly valve is subjected to hydrostatic shell testing (1.5x PN) and low/high-pressure gas seat leakage testing per API 598.
Torque Verification:
100% operational torque testing to ensure smooth actuator mounting and reliable cycling performance.
Material Traceability:
PMI testing on all stainless steel and alloy bodies/discs; Material Test Reports (EN 10204 3.1) provided with every shipment.
OEM & Custom Butterfly Valve Solutions
Customization options include:
Valve size and specifications
1
>>
Body and sealing material selection
2
>>
Connection type
3
>>
Applicable standards
4
>>
Product marking
5
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Packaging requirements
6
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OEM production based on drawings or technical specifications
7
Packaging & Shipping
Packaging:
Export-standard packaging with protective measures to prevent damage during handling and international transportation. Valves can be packed according to product size, quantity and customer requirements.
MOQ:
Flexible MOQ available according to valve type, specifications and order requirements. Sample orders and project-based purchasing can be discussed.
Lead Time:
Production lead time depends on valve specifications, quantity, material requirements and customization level. Standard models can be arranged with shorter delivery schedules.
Shipping:
Support for international shipment with export documentation and delivery terms according to customer requirements, including FOB, CIF and other trade terms.
FAQ
With abundant experience, we are one of the most professional butterfly valve manufacturers and suppliers in China. We warmly welcome you to buy customized butterfly valve made in China here from our factory. If you have any enquiry about cooperation, please feel free to email us.
