Description
Control Butterfly Valves (modulating and high-performance butterfly valves) are compact, light-weight flow control valves engineered for precise throttling, large-volume flow regulation, and reliable isolation. Featuring double offset or triple offset (TOV) geometry, these valves deliver superior control characteristics, low operating torque, and long cycle life in automated piping systems.
Ideal for both low-pressure large-diameter lines and high-temperature severe service, these control valves pair naturally with our complete range of industrial butterfly valves and bolt directly between precision-forged industrial flanges.
Technical Specifications
| Technical Parameter | Specification Details |
|---|---|
| Nominal Diameter Range | DN50 to DN2400 (2" to 96") |
| Nominal Pressure | PN6 / PN10 / PN16 / PN25 / Class 150 / Class 300 / Class 600 |
| Body Material Options | Ductile Iron (QT450), WCB (Carbon Steel), CF8 (304 SS), CF8M (316 SS), Duplex Stainless Steel |
| Structure Type | Concentric (Resilient) / Double Offset / Triple Offset (Metal-to-Metal Seal) |
| Sealing Seat Material | EPDM / NBR / PTFE / Stainless Steel + Graphite Laminated / Stellite Hard Seal |
| Working Temperature | -40°C to 550°C (-40°F to 1022°F) |
| Connection & Standard | Wafer / Lug / Flanged (ASME B16.5, API 609, EN 593, ISO 5752) |
| Actuation Type | Pneumatic Rack & Pinion / Scotch Yoke Actuator (4-20mA positioner) / Smart Modulating Electric Actuator |
Key Advantages & Modulating Capabilities
Control butterfly valves provide cost-effective, high-flow regulation in large piping networks compared to heavy globe or gate valves:
- High Flow Capacity (Cv) & Low Pressure Drop: Streamlined disc profile allows maximum flow throughput with minimal pressure loss, significantly reducing pumping energy costs in large-diameter pipelines.
- Frictionless Triple-Offset Design: Frictionless 90° rotation eliminates seat wear during opening and closing, delivering torque-seated Class VI zero-leakage performance under high temperatures.
- Accurate Throttling Control: Optimized modified linear or equal-percentage flow control between 20° and 70° disc opening angles, backed by ISO 5211 direct-mount automation interface.
Target Applications & Industries
Our control butterfly valves are widely deployed in high-capacity flow handling and thermal management:
- HVAC & District Energy: Chilled water distribution, cooling tower flow balancing, and central heating loops.
- Water Treatment & Desalination: Raw water intake control, reverse osmosis pressure regulation, and pump discharge control.
- Power & Chemical Plants: Flue gas desulfurization (FGD), air blower throttling, and low-pressure steam lines.
Frequently Asked Questions (FAQ)
Q1: Why choose a triple offset control butterfly valve over a soft-seated one?
Triple offset butterfly valves feature metal-to-metal seating capable of withstanding extreme temperatures (up to 550°C), corrosive media, and high pressure drops where rubber or PTFE soft seats would degrade rapidly.
Q2: What is the recommended throttling range for control butterfly valves?
For optimal flow stability and to prevent cavitation or disc flutter, control butterfly valves are best operated between 20° and 70° of open position during continuous regulation.
Q3: Can Oucang Valve customize ISO 5211 top mounting pads and extension stems?
Yes. As a direct factory, Oucang Valve provides ISO 5211 standard mounting brackets, extended stems for cryogenic/high-temperature insulation, and customized companion flanges.
About the Manufacturer: Oucang Valve
Oucang Valve is an ISO-certified direct manufacturer specializing in high-performance butterfly valves, control valves, and forged pipe flanges. Operating our own casting, CNC machining, and hydrostatic pressure testing facility, we offer complete material certification, custom OEM engineering, and direct worldwide shipping.
- Core Capability: Large-diameter machining (up to DN2400), triple offset metal seal grinding, and quick-turn custom fabrication.
- Quality Compliance: API 609, ASME B16.34, EN 593, DIN, and ISO standards.
- Factory Inquiry: Contact our technical engineering team for direct factory prices, Cv calculations, and 2D/3D CAD drawings.
