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| The High-Performance Flange Butterfly Valve is an expertly engineered industrial quarter-turn valve optimized for reliable, low-torque isolation and precise throttling control across water treatment grids, chemical plants, and heavy industrial processing pipelines. Celebrated for its inherently lightweight and compact structural design, this flanged valve series significantly reduces the spatial and structural footprint on industrial piping networks compared to conventional gate or globe valves, delivering an exceptionally high flow coefficient alongside minimal inline fluid friction.Butterfly valves have a simple structure, small size, and light weight, consisting of only a few components. And it can be quickly opened and closed by simply rotating 90 °, with simple operation, and the valve has good fluid control characteristics.To satisfy diverse and demanding chemical compatibility profiles, this series accommodates both Elastic Sealing (Soft-Seated) and Metal-to-Metal Sealing matrices. High-temperature and severe utility applications utilize an elite Triple-Offset (Tri-centric) Geometry. This design incorporates an engineered geometric profile where the stem and seat seat cone axis are offset in three distinct planes. This kinematics configuration allows the laminated metal-to-metal sealing ring to disengage immediately from the valve body seat upon the initial degrees of opening rotation, completely eliminating seat friction, scrubbing, and mechanical wear through its entire stroke. It establishes a repeatable, bubble-tight zero-leakage shutoff per standard test criteria over thousands of operating cycles. Outfitted with a top-mounted enclosed bevel gearbox and handwheel, this valve delivers incredibly reliable flow manipulation under intense operational pressures. | |||||||||
Frictionless Quarter-Turn Rotation: The advanced triple-offset kinematics eliminate structural friction between the disc sealing ring and the body seat through its entire stroke, minimizing seal wear and dramatically lowering the operational torque.
Bi-Directional Bubble-Tight Sealing: Available with high-performance laminated metal-graphite seats or resilient elastomers, achieving zero-leakage performance (Rate A per EN 12266-1) across both high-pressure and low-vacuum gas duties.
Inherently Compact & Lightweight: Features significantly shorter face-to-face dimensions and less total structural weight compared to standard gate valves, lowering initial structural procurement costs and simplifying pipeline field installation.
Linear Regulating Capability: Designed with excellent inherent flow control characteristics, the disk can be positioned precisely at intermediate angles between 0° and 90° for highly stable, predictable throttling control.
Blowout-Proof Stem Architecture: Built with high-strength upper and lower bearings and an integrated anti-blowout retention collar, guaranteeing operator safety and shaft containment under maximum line parameters.
This flanged butterfly valve series is uniquely suited for large-scale utility distribution channels, cooling networks, and chemical transfer lines where quick-acting, low-torque fluid containment is necessary.
Primary Applications Include:
Water Treatment & Cooling Utilities: Municipal water filtration networks, desalination plants, industrial circulating cooling loops, and raw intake infrastructure.
HVAC & District Energy Networks: Large-diameter chilled water headers, condenser circuits, and low-pressure municipal district heating systems.
Petrochemical & Industrial Processing: Air separation skids, non-corrosive hydrocarbons storage networks, and utility vacuum/gas handling manifolds.
Power Plant Utilities: Turbine condenser water circuits, flue gas desulfurization (FGD) systems, and fly ash handling networks.
Parameter Item | Standard Specifications / Values |
Design & Manufacturing Standard | API 609 / EN 593 / GB/T 12238 |
Pressure-Temperature Rating | ASME B16.34 / GB/T 12224 |
Face-to-Face Dimensions | API 609 / ISO 5752 / ASME B16.10 / GB/T 12221 |
Flange End Connections | ASME B16.5 / ASME B16.47 / GB/T 9113 / HG/T 20592 |
Inspection & Pressure Testing | API 598 / ISO 5208 / GB/T 13927 |
Nominal Size Range Scope | DN50 to DN2400 (NPS 2" to NPS 96") |
Nominal Pressure Ratings | PN10, PN16, PN25, PN40 / ASME Class 150, Class 300 |
Body Shell Material Matrix | ASTM A216 WCB (Carbon Steel), ASTM A351 CF8/CF8M (Stainless Steel) |
Disc Material Selections | WCB (Chrome Plated), CF8 (304), CF8M (316), Duplex Steel |
Sealing Seat Material Profile | EPDM, NBR, PTFE / Multi-layer Stainless Steel + Flexible Graphite Laminated |
Actuator Top Interface Pad | ISO 5211 Standard (For direct automatic actuator integration) |
Available Operator Configurations | Enclosed Bevel Gearbox (Shown in file |
Elastic vs. Metal-to-Metal Seat Matching: For clean water, wastewater, or chemical utility media below 120°C, choose an Elastic Sealing Valve (EPDM or PTFE lined) for maximum economy and exceptional bubble-tight soft sealing performance. For operating temperatures exceeding 150°C, or lines handling low-pressure utilities up to 425°C, always specify a Triple-Offset Laminated Metal-to-Metal Seat configuration to prevent seal erosion and thermal degradation.
Flow Direction Verification: High-performance tri-offset butterfly valves generally feature a preferred flow direction for high-pressure isolation. Install the valve in strict compliance with the flow direction arrow cast onto the body to ensure the internal process pressure assists the disc seal, maximizing sealing tight-shutoff efficiency.
Cavitation Mitigation under Throttling: When using this flanged butterfly valve for liquid flow throttling, avoid continuously operating the disk at opening angles below 20°. Throttling within this narrow aperture window creates localized high-velocity fluid jets that can trigger destructive cavitation erosion on both the valve disc and downstream piping walls.
Actuator Sizing & Dynamics: When sizing pneumatic or electric actuators for triple-offset configurations, ensure that the actuator sizing calculations account for the Dynamic Hydrodynamic Torque generated by the high-velocity fluid passing across the asymmetrical disc faces, in addition to the standard seat break torque.
1.When can I get a quotation?
We typically provide a quotation within 4 hours of receiving your inquiry. Urgent requests are given priority.
2.Do you support customized valves?
Yes. We support OEM and customized valves according to drawings, specifications, and special working conditions.
3.What is the production lead time?
Normally, production can be completed within 15 working days after order confirmation, depending on product type and quantity.
4.What standards do your valves comply with?
Our products comply with GB, ANSI, API, JIS, DIN, BS, and other international standards.
5.What pressure, size, and temperature ranges can you supply?
Pressure: Class 150-3500 Size: DN10-DN3000 Temperature: -196ºC to 610ºC
6.What certifications do you have?
We are certified with ISO 9001, CE, and provide third-party inspection and test reports upon request.
7.What delivery and payment terms do you offer?
Delivery terms: EXW, FOB, CFR, CIF
Payment terms: T/T (30% deposit + 70% balance), L/C, and other terms by agreement.
8.Do you provide technical support and spare parts?
Yes. We offer 24/7 technical support and supply spare and consumable parts for long-term service.
