4″ Ball Check Valve DN100 Flanged Automatic Backflow Prevention Easy Maintenance
DN100 4″ ball check valve flanged ductile iron, floating ball automatic one-way sealing, top bonnet for easy repair, for wastewater, mining and water pump pipelines.
Description
This DN100 (4″) ball check valve operates automatically under differential pressure, using a floating ball to achieve unidirectional sealing within the pipeline. Its primary purpose is to prevent reverse media flow after pump shutdown, thereby safeguarding pumps and downstream equipment from hydraulic shock. Suitable for wastewater, circulating water, and fluids containing particulates, it is an essential anti‑backflow component for pumping stations and water treatment systems.
Core Specifications
| Parameter | Detail |
|---|---|
| Nominal size | DN100 / 4 Inch |
| Connection | Flanged end |
| Body material | Ductile iron, 304 stainless steel |
| Pressure rating | PN10 / PN16 |
| Suitable media | Clean water, sewage, mildly corrosive fluids |
| Temperature range | 0°C ~ 80°C |
| Internal component | Rubber coated floating ball |
| Maintenance access | Top removable bonnet |
Material & Structural Features
The valve body is predominantly manufactured from ductile iron ball check valve material, with an external epoxy anti‑corrosion coating that resists abrasion from sand and sediment. The internal floating ball mechanism contains no hinge components, reducing the risk of clogging by debris. The top‑accessible bonnet design allows replacement of the ball or seals without cutting into the pipeline, simplifying maintenance and significantly reducing system downtime. The full‑port flow passage ensures low pressure loss and stable delivery under high‑flow conditions.
Typical Applications
This check valve is widely used in municipal wastewater plants, mining slurry lines, industrial circulating pumping stations, and HVAC water loops. For example, a large circulating water pumping station project in Johannesburg, South Africa, has extensively adopted the 4″ ball check valve across its entire system. The automatic unidirectional sealing feature effectively mitigates water hammer during pump stoppage, while the top‑entry bonnet enables quick seal replacement without pipeline disassembly, greatly improving operational efficiency.
Key Advantages
Compared with swing check valves, this ball type non return valve offers superior resistance to fouling—sludge and particulates are less likely to lodge against the sealing faces. With no springs, hinges, or other fragile small parts, it delivers extended service life. It can be installed horizontally or vertically in the forward direction, accommodating diverse piping layouts. Overall, it provides a cost‑effective solution for medium‑ and small‑scale industrial fluid systems.
