Butterfly Gate
Overview
The Butterfly Gate is a crucial flow control device widely utilized in municipal water and wastewater systems. Its design consists of a disc-shaped barrier mounted within a pipe that rotates to either permit or restrict water movement, thereby enabling precise regulation of flow and pressure. This mechanism allows for effective management of water throughout various stages of the treatment process, supporting both operational efficiency and safety.
Butterfly gates are notable for their suitability across a range of system pressures and pipe sizes, thanks to options in disc, stem, and actuator materials. Their streamlined operation, typically requiring only a quarter turn from open to fully closed, makes them a preferred choice wherever fast actuation and simple maintenance are desired.
Common Applications
- Initial collection systems for controlling incoming water flow
- Intermediate treatment stages to manage system pressure and redirect flows
- Outflow pipes to regulate the discharge of treated water
Operator Experience
- Monitor flow and pressure to verify correct gate function
- Perform regular maintenance, including stem lubrication and disc inspection
- Observe for sudden flow/pressure changes as possible indicators of equipment issues
Major Components
- Disc: Rotates to open or close passage; constructed from materials such as stainless steel or PVC
- Stem: Connects actuator to disc; sized by pressure needs and constructed for durability
- Actuator: Applies force to operate the disc; can be manual or automated
Design Criteria
- Pipe diameter: Measured in inches or centimeters
- Maximum pressure: Specified in psi or bar
- Maximum flow rate: Stated in gallons per minute (gpm) or liters per second (L/s)
Key Design Decisions
Specification Section
- Division 40 — Process Interconnections
- Section 40 05 13 - Common Motor Requirements for Process Equipment
Submittal + Construction Considerations
Popular Manufacturers and Models
- Emerson (Fisher™ Control-Disk™ Valve)
- Mueller Water Products (A-2360 Series)
- KSB (BOAX-SF)
Alternative Equipment
- Ball Valve: Offers similar flow interruption, preferred for higher pressure scenarios due to robust sealing.
- Gate Valve: Used for applications needing more precise flow regulation.
Real-World Tips
Connect with a Local Distributor
If you need help with sizing, system compatibility, maintenance planning, or sourcing, connect with your local manufacturer's representative. They can assist you in selecting the right equipment for your specific application and site conditions.
