Product Overview
A steel plate butterfly valve utilizes a welded structural steel body instead of a traditional cast shell, engineered for large-diameter fluid and gas isolation. Fabricated from rolled carbon or stainless steel plates, this construction delivers high structural rigidity while eliminating casting defects such as porosity or sand inclusions. Standard production ranges from DN200 to DN3000, with operating pressures up to PN25. It integrates an offset disc design or concentric resilient seat configuration, serving municipal water distribution, HVAC ductwork, and industrial cooling circuits where weight reduction and structural reliability dictate specifications.
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![Transformer Oil Shut-off Butterfly Valve]()
Transformer Oil Shut-off Butterfly Valve• Body Material: High-strength steel plateview more
• Nominal Diameter: DN25–DN300
• Working Pressure: 0.1–0.6MPa
• Suitable Medium: Transformer oil
• Operating Temperature: -30℃～120℃
• Operation: Manual,... -
![Transformer Oil Inlet Butterfly Valve]()
Transformer Oil Inlet Butterfly Valve• Body Material: High-strength steel plate, cast steel optionalview more
• Nominal Diameter: DN32–DN300
• Working Pressure: 0.1–0.6MPa
• Applicable Medium: Transformer oil
• Operating Temperature:... -
![Steel Plate Butterfly Valve For Transformer]()
Steel Plate Butterfly Valve For Transformer• Valve Body Material: Q235 carbon steel, cast steel, stainless steel 304/316 optionalview more
• Nominal Diameter: DN25-DN300
• Working Pressure: 0.15-0.25MPa
• Applicable Temperature: -26℃-105℃
• Sealing...
Product Types, Construction & Working Principle
Body Configurations
Available in wafer, lug, and double-flanged designs. Flanged models utilize heavy-duty gussets welded directly to the pipe mating flanges to prevent pipeline stress distortion.
Disc & Shaft Assembly
The streamlined disc minimizes flow resistance and pressure drop. A high-strength shaft is secured via pinned or spline connections, transmitting actuator torque evenly across the valve bore.
Working Principle
Rotation of the shaft turns the disc through 90 degrees within the bore. In the closed position, the outer edge of the disc compresses against a resilient elastomer seat or precision-machined metal seat, creating a continuous seal against line pressure.
Weld-Fabricated Body: Constructed from rolled steel plates with full-penetration butt welds, providing higher tensile strength than standard cast iron or cast steel bodies.
Replaceable Elastomer Seat: Bonded or mechanically retained seat ring isolates the body from the working medium, preventing internal corrosion and facilitating rapid field replacement.
Low Pressure Drop: The thin profile of the fabricated disc reduces flow turbulence, lowering operational pumping energy costs in high-volume systems.
Bidirectional Sealing: Precision-machined seating surfaces allow reliable shutoff in both flow directions up to the rated pressure threshold.
Technical Specifications
|
Technical Parameter |
Specification Range / Details |
|
Size Range |
DN200 - DN3000 (NPS 8 - NPS 120) |
|
Pressure Ratings |
PN6, PN10, PN16, PN25 / Class 150 |
|
Body Materials |
Carbon Steel, Stainless Steel (AISI 304, 316, 316L) |
|
Disc Materials |
Ductile Iron, Aluminum Bronze, Stainless Steel (304/316), Super Duplex |
|
Seat Materials |
EPDM (-20 deg C to 120 deg C), NBR (-10 deg C to 80 deg C), PTFE (-20 deg C to 150 deg C), Stainless Steel (Metal-to-Metal up to 425 deg C) |
|
Actuation Options |
Manual gear operator, pneumatic piston actuator, electric multi-turn/quarter-turn actuator (IP67/IP68 enclosure) |
Applications
Water Treatment & Desalination
Raw water intake, municipal distribution mains, and large filtration skid isolation lines.
Power Generation
Circulating cooling water systems, condenser water lines, and low-pressure flue gas desulfurization scrubber loops.
HVAC & District Cooling
Central chiller plants, mechanical equipment rooms, and high-rise building main risers.
Industrial Process
Pulp and paper stock lines, cement plant dust collection ducts, and general bulk material ventilation systems.
Plate Cutting & Preparation: CNC plasma and laser cutting tables ensure precise dimensional profiling of steel plates prior to rolling and welding.
Welding Procedure: Certified welders execute GMAW (Gas Metal Arc Welding) and SAW (Submerged Arc Welding) processes in accordance with ASME Section IX standards.
Non-Destructive Testing (NDT): 100 percent visual inspection on all structural welds, supplemented by ultrasonic testing or magnetic particle testing on critical high-stress joints per client specification.
Pressure Testing: Every valve undergoes shell hydrostatic testing at 1.5 times the rated pressure and seat leakage testing at 1.1 times the rated pressure using computerized test benches.
Customization
Structural Dimensions
Custom face-to-face lengths and custom drilling patterns to match legacy retrofit requirements.
Special Coatings
Epoxy fusion-bonded coatings applied at 300+ microns, marine-grade polyurethane systems, or rubber-lined interior waterways for abrasive slurry service.
Shaft Extensions
Extended bonnets and stem extensions configured for buried service or insulated pipeline installations.
Hebei Anmei Electrical Equipment Co., Ltd. is one of the most professional steel plate butterfly valve manufacturers and suppliers in China, specialized in providing high quality products and service. Please feel free to buy customized steel plate butterfly valve made in China here from our factory. Contact us for quotation.
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