Double Flange Type Triple Eccentric Design Butterfly Valves
SUN’s Double Flange Type Triple Eccentric Design Butterfly Valve is a special kind of valve used to control the flow of fluids (like water or gas) in pipelines. Here’s a simple breakdown of the terms:
Butterfly Valve: A type of valve that uses a flat, round disc (like a butterfly’s wing) to control the flow of fluid. The disc turns to either allow or block the flow.
Double Flange Type: This means the valve has two flanges (the flat, round parts with holes for bolts) on either side. These flanges are used to attach the valve securely to a pipeline.
Triple Eccentric Design: This is a fancy way of saying that the valve’s disc and seat are designed in a way that they don’t touch until they need to. This helps the valve last longer and work more smoothly. “Triple” refers to three key parts of the valve that are offset, making it more efficient and leak-resistant when it closes.
So, a Double Flange Type Triple Eccentric Design Butterfly Valve is a durable, efficient valve that uses a rotating disc to control fluid flow, and it has special features that make it more reliable and less prone to leaks.
Water Treatment:
Commonly used in potable water and wastewater pipelines.
HVAC:
For air flow control and fluid regulation in heating and cooling systems.
Chemical Processing:
For handling corrosive and aggressive chemicals.
Mining and Industrial Applications:
Often found in systems handling slurries or abrasive fluids.
Compact Design:
The wafer-type design reduces the weight and space required for installation, making it ideal for constrained spaces.
Ease of Installation:
These valves can be quickly and easily bolted between flanges, requiring fewer bolts than other valve types.
Cost-Effective:
Wafer-type valves generally have a lower cost due to their design, making them a budget-friendly solution.
Maintenance:
The split-body design makes the valve easier to maintain, with simplified access to internal components.
Versatility:
They are used in a variety of industries, from water treatment to HVAC systems.
| Specification | Details |
|---|---|
| Valve Type | Double Flange Type Triple Eccentric Butterfly Valve |
| Size Range | DN50 (2″) to DN2400 (96″) or custom sizes |
| Pressure Rating | ANSI Class 150, 300, 600, or customized |
| Temperature Range | -196°C to 700°C (-320°F to 1300°F) |
| End Connection | Flanged (ANSI, DIN, JIS, or other standards) |
| Body Material | Cast Iron, Carbon Steel, Stainless Steel, Alloy Steel |
| Seat Material | PTFE, EPDM, NBR, Metal Seat (depending on application) |
| Seal Type | Metal-to-metal, Soft Seat, or Combination |
| Pressure Drop | Low pressure drop (typically less than 1 bar at full flow) |
| Face-to-Face Dimension | According to ANSI B16.10 or customized |
| Design Standard | ANSI B16.34, API 609, ISO 5752, or as required |
| Actuation Options | Manual, Electric, Pneumatic |
| Flow Coefficient (Kv) | Dependent on valve size and configuration |
| Torque | Low torque, varies by size (typically 20-50% lower than conventional butterfly valves) |
| Stem Material | Stainless Steel, Duplex Steel, or Alloy Steel |
| Operating Torque | 50-1000 Nm (depending on size and pressure rating) |
| Leakage Rate | ANSI Class VI (metal seated) or ANSI Class IV (soft seated) |
| Seat Pressure | Typically up to 1000 psi, depending on design and material |
| Mounting Standard | ISO 5211 (for actuator mounting) |
| Fire-Safe Design | Optional, available as per API 607 or API 6FA standards |
| Liner/Insert Materials | Stainless Steel, Brass, Monel, or other materials based on media |
| Applications | Power Generation, Oil & Gas, Chemical, Water Treatment, HVAC |
| Test Standards | API 598, EN 12266, ISO 5208, or as per client requirements |
| Certification | CE, ISO 9001, API 6D, ASME B16.34, or equivalent |
Notes:
- Size Range: The size range of butterfly valves can vary significantly, with larger valves requiring more robust designs and materials to handle higher flow rates and pressures.
- Materials: Valve body and seat materials are selected based on the application medium (corrosive, abrasive, or high-temperature media).
- Pressure Rating: The pressure class will vary depending on the specific requirements, with higher class valves used in high-pressure systems.
- Temperature Range: The valve’s temperature tolerance depends on the seat and sealing materials. For example, metal-seated valves handle higher temperatures.
- Actuation Options: Manual operation for small sizes and electric or pneumatic actuators for larger sizes for automated operation.
A wafer-type butterfly valve is distinguished by its body design, which does not have flanges. Instead, the valve is sandwiched between two flanges in the piping system. This design simplifies installation and reduces the space required for the valve.
Split-Body Construction:
The split-body design allows the valve body to be separated into two parts, facilitating easier maintenance and repair. This design enhances the durability and the sealing ability of the valve, especially in high-pressure systems.
Butterfly Valve Mechanism:
The valve features a rotating disc (resembling a butterfly), which controls the flow of fluid by rotating around its axis. In the open position, the disc aligns with the flow path, allowing fluid to pass. When the valve closes, the disc rotates 90 degrees to obstruct the flow.