Storz couplings are a popular type of hose coupling used across a wide range of industrial, agricultural, firefighting and fluid-handling applications.
Unlike threaded connections, Storz couplings connect using symmetrical coupling halves that are joined together and twisted into position. This makes them particularly useful where hoses need to be connected and disconnected quickly.
But what exactly are Storz couplings, where are they used and how do you know which type is suitable for your application?
What Is a Storz Coupling?
A Storz coupling is a type of hose coupling that uses identical male and female halves rather than separate male and female connections. The two coupling halves are aligned and pushed together before the locking rings are rotated to secure the connection. Because the coupling halves are symmetrical, either half can connect to the other. This can make Storz couplings particularly convenient for applications where hoses are regularly moved or reconfigured.
How Do Storz Couplings Work?
Storz couplings use interlocking claws and a locking mechanism to create the connection. The coupling halves are brought together with the claws aligned. They are then rotated until the connection is secure. A sealing gasket between the coupling halves helps prevent leakage. The connection can then be released by rotating the coupling in the opposite direction.
This simple design allows hoses to be connected and disconnected without the need for traditional threaded connections.
Where Are Storz Couplings Used?
Storz couplings are used across a variety of industries and applications.
Common examples include:
- Agriculture
- Irrigation
- Water transfer
- Wastewater
- Firefighting
- Construction
- Industrial fluid handling
- Tanker applications
- Pumping systems
- Suction and discharge hoses
They are particularly useful where large-bore hoses need to be connected and disconnected regularly.
What Are Storz Suction Couplings?
Storz suction couplings are commonly used with suction hose applications where a pump needs to draw liquid from a tank, reservoir or other water source. Suction applications place different demands on a coupling compared with straightforward discharge applications.
The coupling, hose and sealing arrangement need to be capable of maintaining the required connection and preventing air ingress.
This makes correct coupling and gasket selection important.
Storz Coupling Sizes
Storz couplings are available in a range of sizes to suit different hose diameters and flow requirements. The correct size isn't simply determined by the physical hose diameter.
The application may also require consideration of:
- Required flow rate
- Operating pressure
- Suction conditions
- Hose type
- Fluid being transferred
- Connection dimensions
- Operating environment
Selecting the correct size helps ensure the coupling does not unnecessarily restrict the system or create an unsuitable connection.
Storz Coupling Compatibility
When replacing an existing Storz coupling, compatibility should be checked carefully.
Important considerations include:
Hose Diameter
The coupling needs to be suitable for the hose it is being fitted to.
Coupling Size
Storz couplings are identified by standardised sizes and dimensions, so the correct size needs to be established before ordering.
Operating Pressure
The coupling must be suitable for the pressure generated by the application. Suction applications may have different requirements from pressure discharge applications.
Fluid
The materials and sealing components need to be compatible with the fluid being transferred. Water, chemicals, slurry and other fluids can have different material compatibility requirements.
Gasket
The gasket is an important part of the coupling assembly. The correct gasket material should be selected according to the fluid, temperature and application.
Why Choose Storz Over a Threaded Connection?
One of the main advantages of Storz couplings is the speed at which they can be connected and disconnected. This can be particularly useful in applications involving:
- Regular hose changes
- Mobile equipment
- Temporary pumping systems
- Irrigation
- Agricultural equipment
- Water transfer
- Emergency response
The symmetrical design also means there is no separate male and female coupling half to match.
Storz Couplings for Agriculture and Irrigation
Storz couplings are particularly useful in agricultural and irrigation applications where hoses and pumping equipment may need to be moved around a site. They can be used for transferring water between pumps, tanks, irrigation equipment and other systems. The ability to make quick connections can save time when equipment needs to be relocated or reconfigured.
Choosing the Right Storz Coupling Before ordering, consider:
- Hose diameter
- Coupling size
- Required flow
- Operating pressure
- Suction or discharge application
- Fluid being transferred
- Temperature
- Gasket material
- Material of the coupling
- Frequency of connection and disconnection
If you're unsure which Storz coupling is suitable, providing details of the hose and application to a specialist supplier can help avoid ordering an incompatible component.
Storz Couplings from IHP
IHP supplies a range of industrial hose and coupling solutions for applications including agriculture, irrigation, water handling and industrial fluid transfer. Whether you need Storz suction couplings, replacement gaskets or associated hose fittings, selecting the correct combination of hose and coupling is important for safe and reliable operation.
Need Help Selecting a Storz Coupling?
If you're unsure which Storz coupling or suction coupling is suitable for your application, IHP can help identify the appropriate product based on your hose size and operating requirements.
