Flanged Ball Float Check Valve
The Flanged Ball Float Check Valve is a specialized non-return valve designed primarily for pumping stations and systems handling liquids. It is an automatic valve that uses a free-moving ball to control the flow and prevent backflow.
This valve is highly valued for its self-cleaning operation and simplified maintenance in vertical installations.
⚙️ How It Works
- Opening (Forward Flow): The valve contains a ball that rests on a seat with a single through hole. The ball has a slightly larger diameter than the hole. When the pressure behind the seat (inlet) exceeds the pressure above the ball (outlet), the liquid flow pushes the ball off the seat, allowing the liquid to flow through the valve.
- Closing (Backflow Prevention): If the pressure above the ball (outlet) exceeds the pressure below the seat (inlet), the ball is forced back to rest precisely in the PTFE seat, forming a tight seal that immediately prevents backflow.
- Self-Cleaning: During operation, the ball typically rotates as the liquid flows past it. This rotation prevents debris from settling on the ball or seat, making the valve inherently self-cleaning and reducing maintenance frequency.
📋 Technical Specifications
| Component | Material |
| Body / Bonnet | CAST IRON |
| Design Standard | API594 / API6D (Implied) |
| Pressure Rating | PN10 / PN16 |
| Size Range | DN40 – DN300 |
| Seat Material | PTFE |
| Ball Material | CARBON STEEL + RUBBER (Coated) |
| Ball Float Material | EPDM / Aluminium |
| Gasket | RUBBER |
| Bolts, Nuts, Plug, Thrust Washer | CARBON STEEL |
⭐ Key Applications and Advantages
- Primary Application: Pumping Stations and liquid/spray devices.
- Suitability: Also used in manual air pumps, refillable dispensing syringes, and any application requiring tight unidirectional control.
- Vertically Maintenance Free: The design allows for simplified maintenance procedures, particularly when installed vertically.
- Reliability: The simple, robust mechanism ensures reliable, long-term performance against backflow.
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