Overview
Butterfly valves are widely used in industrial applications for regulating and isolating flow. Known for their lightweight design and cost-effectiveness, butterfly valves operate using a rotating disc to control fluid flow. Their versatility makes them suitable for a variety of industries, including oil and gas, water treatment, and HVAC systems.
P&ID Symbol of Butterfly Valves
The butterfly valve is represented in P&IDs by a simple, distinct symbol that highlights its operational characteristics:
| Symbol | Name | Description |
|---|
 | Butterfly Valve Type Form 1 | A Form 1 type valve with a rotating disc for flow regulation. |
 | Butterfly Valve Type Form 2 | A Form 2 type valve with a rotating disc for flow regulation. |
- ISO 10628-2: Diagrams for the chemical and petrochemical industry, Part 2
- ISA Standard: Complies with ISA S5.1 standards.
- Symbol Variation: Symbols may vary slightly depending on the type of actuator (e.g., manual, pneumatic, or electric).
Applications of Butterfly Valves
Butterfly valves are used in a range of applications, including:
- Water Treatment: For regulating water flow in pipelines.
- Oil and Gas: Suitable for low-pressure, large-diameter pipelines.
- HVAC Systems: Efficient for controlling airflow in duct systems.
- Chemical Processing: Used for non-corrosive and mildly corrosive fluids.
Technical Specifications
Features:
- Compact Design: Ideal for tight spaces.
- Quick Operation: 90-degree rotation for fully open or closed positions.
- Sealing Options: Soft seat for tight shut-off; metal seat for high-temperature applications.
Types of Butterfly Valves:
- Concentric Butterfly Valve: Centered disc; suitable for low-pressure applications.
- Double Offset Butterfly Valve: For medium-pressure and temperature environments.
- Triple Offset Butterfly Valve: High-performance; ideal for high-pressure and high-temperature applications.
Data Sheet of Butterfly Valve
| Attribute | Details |
|---|
| Valve Type | Butterfly Valve |
| Design | Concentric, Double Offset, Triple Offset |
| Operation | Manual, Pneumatic, Electric |
| Standards | ANSI, API, ISO, DIN |
| Industries | Water Treatment, HVAC, Oil & Gas |
Material Specifications
| Component | Material Options |
|---|
| Body | Cast Iron, Ductile Iron, Stainless Steel |
| Disc | Stainless Steel, Aluminum Bronze |
| Seat | EPDM, PTFE, Metal |
| Stem | Stainless Steel |
Technical Specifications
| Attribute | Options |
|---|
| Size Range | 2 inches to 72 inches |
| Pressure Rating | ANSI Class 150, 300 |
| Temperature Range | -40°F to 600°F (-40°C to 316°C) |
| End Connections | Wafer, Lug, Flanged |
Actuation Options
| Actuator Type | Details |
|---|
| Manual | Hand Lever, Gearbox |
| Pneumatic | Double-Acting, Spring Return |
| Electric | On/Off, Modulating, Explosion-Proof |
| Attribute | Details |
|---|
| Leakage Class | Class VI (Soft Seat), Class IV (Metal Seat) |
| Torque Requirements | Varies by size and material |
| Cycle Life | 50,000+ Cycles (Depending on application) |
Accessories and Add-Ons
| Accessory | Details |
|---|
| Positioner | Analog or Digital |
| Limit Switches | Mechanical or Proximity |
| Solenoid Valve | For Pneumatic Actuators |
| Manual Override | Available for Pneumatic and Electric Actuators |
Example Configurations
| Configuration | Details |
|---|
| Manual Operation | 6-inch Butterfly Valve, Cast Iron Body, Wafer End, Hand Lever |
| Pneumatic Actuation | 12-inch Butterfly Valve, Stainless Steel Disc, Spring Return Actuator, Flanged End |
| Electric Actuation | 24-inch Butterfly Valve, Ductile Iron Body, Explosion-Proof Actuator, Lug End |
| Parameter | Details |
|---|
| Warranty | 12-24 Months |
| Certifications | ISO 9001, API 609, CE |
| Testing | Hydrostatic, Air Leakage |
Micro Data Sheet for Butterfly Valves
| Attribute | Value |
|---|
| Material | Ductile Iron |
| Size | 12 inches |
| Pressure Rating | 300 PSI |
| Temperature Range | -20°F to 400°F |
| End Connection Type | Wafer |
| Actuator Type | Pneumatic |
Vendor List for Butterfly Valves
- Emerson: Offers high-performance triple-offset butterfly valves.
- Flowserve: Specializes in metal-seated butterfly valves for extreme conditions.
- Crane Co.: Supplies concentric butterfly valves for water treatment applications.
Explore vendors for butterfly valves in your region using Mails AI.
Cost Data for Butterfly Valves
| Parameter | Specification | Estimated Cost |
|---|
| Material | Cast Iron | $100 - $300 |
| Actuator Type | Electric | $500 - $1,200 |
| Size (Diameter) | 12 inches | $200 - $500 |
For accurate pricing of butterfly valves, access cost data using Cost AI.
3D Model of Butterfly Valve
To integrate this 3D model of a butterfly valve in a Process Plant use Model Builder. Download butterfly-valve.json. Choose File > Import and use the downloaded file to add the model to the scene. Choose Add > Light > Directional to add directional light.
Conclusion
Butterfly valves are essential components in various industrial applications. With their compact design and versatility, they provide efficient flow control and isolation. Use this guide alongside tools like Micro Data Sheets, Vendor Lists, and Cost AI to make informed decisions and optimize your engineering projects.
