3 Inch Flanged Ball Valve Quick Quarter Turn Shut Off For Municipal Water Pipeline
3 inch water valve with fast 90° opening & closing, flanged connection, cast iron & SS body for municipal water pumping station emergency cut-off.
Description
I. Product Function
The 3‑inch water valve is designed for DN80 water supply and drainage pipelines. It is predominantly offered as a flanged ball valve, enabling rapid on/off switching via a 90° rotation—a marked departure from the multi‑turn operation of conventional gate valves. Its full port ball valve design ensures a full‑bore passage, minimizing flow resistance and pressure loss during water conveyance. The valve body is available in ductile cast iron or stainless steel, accommodating both standard municipal fresh water and applications involving sediment‑laden or mildly corrosive sources. It serves primarily for rapid isolation of main supply lines, emergency shutdown during network repairs, and zone control in water recirculation systems.
II. Specification Table
| Parameter | Detail |
|---|---|
| Nominal size | 3 inch / DN80 |
| Valve type | Flanged ball valve |
| Body material | Ductile cast iron / 304 stainless steel |
| Actuation characteristic | 90° quick open/close – quarter‑turn to fully open or fully shut |
| Port configuration | Full port ball valve |
| Operation | Manual lever; gear‑operated option available |
| Pressure rating | Class150 / PN16 |
| Sealing material | PTFE or hard alloy (optional) |
| Suitable media | Municipal tap water, circulating cooling water, landscape water, irrigation water |
| Temperature range | 0°C~85°C |
The flanged end connections comply with standard municipal pipeline installation practices. The full‑bore internal design avoids flow restriction and resists sediment accumulation. The valve’s key benefit lies in its swift response—during pipeline bursts or leakage emergencies, it can be closed promptly to curtail water loss and shorten the outage period for the affected zone. The cast‑iron version offers economical performance for general municipal supply, while the stainless steel model provides superior corrosion resistance for coastal areas with saline water.
III. Typical Applications
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Main lines in municipal water supply pumping stations
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Cooling water systems in commercial complexes
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Water recirculation in water parks
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Large‑scale agricultural irrigation mains
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Circulating water piping in power plants
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Filter lines in water treatment plants
IV. Practical Application Case
During the upgrade of the Brisbane North Suburb Water Pumping Station in Australia, all DN80 supply mains were retrofitted with the 3‑inch flanged ball valve. The previous gate valves required lengthy turning for operation, causing prolonged supply disruptions to surrounding residential areas whenever pipe repairs were needed. After replacement, staff can now isolate a faulty section with just a quarter‑turn of the lever, cutting emergency shutdown time by 70% while keeping other supply lines fully operational. This significantly reduces the impact of repair work on local water users. The pumping station runs continuously, and the ball valve maintains stable sealing performance even after frequent cycling, with minimal risk of leakage or sticking.
V. Key Advantages
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Rapid actuation – a quarter‑turn completes switching, ideal for urgent municipal repair scenarios.
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Full‑port design lowers flow resistance, contributing to energy savings over long‑term pumping operations.
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Flanged connections ensure secure installation, while dual body material options adapt to various water quality conditions.
