Foam Fire Hydrant Ductile Iron Brass Dual Outlet
A dual-function fire hydrant integrating water supply and foam connection capability. Featuring a ductile iron body with brass outlets, it ensures high strength, corrosion resistance, and reliable sealing performance. Designed for high-risk industrial sites such as oil depots, chemical plants, ports, and aircraft hangars requiring both cooling water and foam firefighting.
Description
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Products Description
Foam Fire Hydrant Ductile Iron Brass Dual Outlet
An integrated unit combining fire hydrant functionality with foam pipeline connection capability. The hydrant body is made of ductile iron through integral casting, while both side outlets are forged brass components. It ensures high pressure-bearing strength of the piping network as well as long-term sealing reliability of the connections. This product is suitable for high-risk industrial applications where both cooling water and foam firefighting media are required.
Product Positioning
Not just a fire hydrant.
A shared valve body for both water and foam applications.
In high-risk facilities such as oil depots, chemical storage tank farms, ports, and aircraft hangars, a single water-based fire protection system is often not sufficient to handle flammable liquid fires. On-site response typically requires both rapid water supply for cooling tank surfaces and the ability to immediately switch to foam-based suppression once a foam line is connected.
This hydrant is designed with that dual requirement in mind-allowing the same valve body to operate under two different fire-fighting conditions without the need for separate piping systems and interfaces for water and foam. This approach significantly reduces pipeline layout space while lowering system construction complexity and long-term inspection workload.
It is better understood as a "connection node" within the fire protection network: the upstream side connects to a municipal water supply or fire water storage tank, while the two side outlets downstream can be used to connect fire hoses or foam proportioning equipment. Depending on the fire scenario, operators or automated control systems can activate the appropriate branch to match the required extinguishing medium.
Material & Structural Analysis
Why ductile iron (valve body) + brass (outlets)
The hydrant body is designed to withstand combined stresses from normal pipeline pressure and transient water hammer effects. Ductile iron, with spheroidal graphite distributed within its microstructure, offers significantly higher tensile strength and toughness compared to traditional gray cast iron. This structure makes it far less prone to brittle fracture under long-term pressurization, temperature fluctuations, or accidental impact.
This is also why ductile iron is widely used in municipal pipeline valves and fire hydrant bodies, rather than lighter aluminum alloys or more brittle gray cast iron. For installations that remain buried or exposed for years, long-term structural stability is more critical than initial weight reduction.
Brass outlet connections
The two side outlets are among the most frequently operated components of the hydrant, and also the most vulnerable to corrosion and seizure due to foam residue and chlorine-containing fire water.
Brass offers excellent corrosion resistance and a relatively low friction coefficient, ensuring that threads and sealing surfaces remain smooth even after long-term repeated operation. This reduces the risk of outlet seizure during emergency use-when every second matters-and also minimizes maintenance frequency and the need for part replacement over time.
Application Scenarios
This unit is commonly deployed in three representative high-risk environments, each with different operational priorities.
Petrochemical tank farms / storage bund areas
Installed at intervals along the outer perimeter of storage tank bunds, these hydrants serve as routine cooling water supply points for tank shell protection.
In the event of a liquid surface fire, the outlet can be rapidly switched-within seconds-from water discharge to foam line connection. It then works in coordination with mobile foam monitors or fixed foam generators to form an effective blanket extinguishing system.
Chemical warehouses / hazardous material storage yards
These facilities typically store flammable liquids in segregated zones. Hydrants are arranged along main access aisles, providing both conventional firefighting water supply and a temporary connection point for foam lines.
This dual-function design helps eliminate the need for a dedicated foam main pipeline system, significantly reducing construction cost and overall piping complexity.
Ports / aircraft hangars / other open industrial sites
These environments are continuously exposed to humidity, salt mist, and harsh outdoor conditions, placing higher demands on corrosion resistance of outlet components.
In such conditions, brass outlet fittings offer a noticeably longer maintenance cycle compared to standard carbon steel or galvanized steel interfaces, reducing the risk of seizure or failure during emergency operations.
Selection Parameters
| Item | Specification |
|---|---|
| Body material | Ductile iron QT450-10, epoxy resin coating |
| Outlet material | Forged brass HPb59-1 |
| Nominal diameter | DN65 / DN80 / DN100 (customizable) |
| Nominal pressure | PN10 / PN16 |
| Outlet configuration | Dual outlets (left-right symmetrical layout) |
| Connection type | Flanged connection; standards available: GB / ANSI / DIN (customizable) |
| Sealing system | Double sealing: O-ring + flat gasket |
| Applicable media | Firefighting water, foam mixed solution |
| Surface treatment | Body: powder coating / outlets: natural polished finish |
FAQ
Q: What is this product used for?
A: It integrates fire hydrant water supply and foam line connection, suitable for high-risk fire scenarios requiring both cooling water and foam suppression.
Q: Can it be used for foam systems directly?
A: Yes. The dual outlet design allows connection to foam proportioning equipment or foam monitors when needed.
Q: Why use ductile iron for the body?
A: Ductile iron provides high strength and toughness, resisting pressure, water hammer, and long-term structural fatigue.
Q: Why are the outlets made of brass?
A: Brass offers strong corrosion resistance and smooth threading, reducing seizure risk in foam-water mixed environments.
Q: What industries is it suitable for?
A: It is widely used in oil depots, chemical plants, storage tanks, ports, and aircraft hangars where both water and foam fire protection are required.
Our address
NO.8, YUANFENG ROAD, MEIYUAN VILLAGE, KANGMEI TOWN, NANAN CITY, QUANZHOU CITY, FUJIAN CHINA
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