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Forging Aluminum / Stainless Steel High Pressure Fire Hose Storz Coupling / Fire Pump Storz Coupling
Engineered for high-pressure firefighting water supply — forged bodies, FKM seals, and pressure ratings far above standard 16 bar couplings.
Fire hose Normal Storz Coupling — its standard working pressure is 16 bar. Fire Pump High Pressure Storz Coupling is a special grade coupling made with upgraded materials (e.g., stainless steel or brass instead of aluminum) or improved manufacturing processes (forging), but it follows pressure ratings far higher than 16 bar, and offers greater corrosion resistance, a wider temperature range, and a higher safety margin.
The high-pressure storz coupling for fire hose and fire pump is a critical connection component in firefighting water supply systems, and its performance directly affects the success or failure of firefighting and rescue operations. Especially in high-rise buildings or long-distance water supply scenarios, where supply pressure is high and pressure fluctuations are significant, ordinary couplings are highly prone to disengagement, leakage, or even bursting. Therefore, dedicated high-pressure couplings have higher requirements in terms of materials, structure, and manufacturing processes.
Materials and Seals
The body is mainly made of cast aluminum alloy — lightweight and low-cost. Seals are typically NBR (Nitrile Rubber), with a temperature range of approximately -40°C to +110°C.
The material is forged aluminum alloy or stainless steel. Seals are often fitted with FKM (Fluororubber), raising the temperature limit to +200°C, making it more suitable for high-temperature or chemically corrosive environments and higher working pressures.
Structure and Manufacturing Process
The structure uses a standard symmetrical hook locking design, typically requiring about 120° of rotation to complete the connection. The body is mostly produced by casting.
The core locking structure remains unchanged, but some products adopt a swivel-type hose tail design to prevent hose kinking during connection. When pressure resistance requirements are extremely high, casting processes are strictly restricted, and high-strength forging is required.
Working Pressure and Temperature
| Specification | Normal Storz Coupling | High Pressure Storz Coupling |
|---|---|---|
| Body Material | Cast aluminum alloy | Forged aluminum alloy or stainless steel |
| Seal Material | NBR (Nitrile Rubber) | FKM (Fluororubber) |
| Working Pressure | Usually rated at 16 bar (PN 16) | Above 24 bar |
| Test Pressure | Approximately 24 bar | Higher than normal grade |
| Burst Pressure | Can reach 48 bar | Higher safety margin |
| Temperature Range | Approximately -40°C to +110°C | -15°C to +200°C (stainless steel version) |
Normal Storz Coupling: Working pressure is usually rated at 16 bar (PN 16), test pressure is approximately 24 bar, and burst pressure can reach 48 bar.
High Pressure Storz Coupling: Working pressure is above 24 bar. However, note that simply changing materials may not achieve 24 bar. The core advantage of the stainless steel version lies in its temperature resistance (-15°C to +200°C) and chemical corrosion resistance, rather than a simple multiple of pressure capacity.
Applications and Use Scenarios
Municipal firefighting, agricultural irrigation, and general industrial water supply. Aluminum couplings are lightweight, making it easy for firefighters to carry and operate quickly at fire scenes; used for fire hose connections.
Connections for fire hose and fire pumps on ships, in chemical plants, refineries, and offshore platforms. These scenarios need to withstand seawater corrosion, chemical attack, or high-temperature steam. Brass couplings are sometimes also used in special firefighting situations for explosion protection (avoiding sparks).
Frequently Asked Questions (FAQ)
What is the difference between a normal Storz coupling and a high pressure Storz coupling?
A normal Storz coupling has a standard working pressure of 16 bar and is made of cast aluminum alloy with NBR seals. A high pressure Storz coupling is a special grade coupling made with upgraded materials (e.g., stainless steel or brass instead of aluminum) or improved manufacturing processes (forging), and it follows pressure ratings far higher than 16 bar while offering greater corrosion resistance, a wider temperature range, and a higher safety margin.
What materials and seals are used in a high pressure Storz coupling?
The body material is forged aluminum alloy or stainless steel. Seals are often fitted with FKM (Fluororubber), raising the temperature limit to +200°C, making it more suitable for high-temperature or chemically corrosive environments and higher working pressures.
What is the working pressure of a high pressure Storz coupling?
Working pressure is above 24 bar. However, note that simply changing materials may not achieve 24 bar. The core advantage of the stainless steel version lies in its temperature resistance (-15°C to +200°C) and chemical corrosion resistance, rather than a simple multiple of pressure capacity.
Where are high pressure Storz couplings used?
They are used for connections for fire hose and fire pumps on ships, in chemical plants, refineries, and offshore platforms. These scenarios need to withstand seawater corrosion, chemical attack, or high-temperature steam. Brass couplings are sometimes also used in special firefighting situations for explosion protection (avoiding sparks).
When should I choose a high pressure Storz coupling instead of a normal one?
When facing corrosive fluids, high temperatures, high pressures, or requirements for a higher safety margin, you need to choose the High Pressure Storz Coupling for fire hose and fire pump.
Do you also supply related safety products such as safety clothing fabric?
Yes. Alongside high pressure Storz couplings for fire hose and fire pump systems, we also supply safety clothing fabric and other industrial protective materials for firefighting and industrial safety applications.
Related Products
In addition to forged aluminum and stainless steel high pressure Storz couplings for fire hose and fire pump systems, we supply Safety Clothing fabric and other protective materials for firefighting, industrial, and offshore safety applications.
