How to choose DIN fittings for industrial plants

The choice of DIN fittings is crucial in the design and maintenance of industrial systems. In the food & beverage , canning , and dairy industries , hygiene, safety, and reliability of connections are essential requirements, and compliance with various regulations is a priority. In this guide, we analyze the main types of DIN fittings to help you identify the solution best suited to your application and hygiene standards.

DIN 11851 fittings: the most widely used standard in food processing plants

DIN 11851 fittings are among the most widely used solutions in the food industry thanks to their versatility and ease of assembly.

Main features

• Available in numerous shapes (male, female, etc.)
• Materials: AISI 304 or AISI 316 stainless steel
• Ideal for frequent connections thanks to the simple and easily inspectable seal

When to choose it

Choose DIN 11851 fittings when:

• The system requires frequent washing or dismantling operations
• The operating pressure is not particularly high
• A reliable connection is needed for product or service transfer lines

DIN 11864 Fittings: The Aseptic Choice for Hygienic Applications

DIN 11864 fittings are designed for systems where hygiene is a critical factor, such as process lines with a high risk of bacterial proliferation.

Main features

• Available in versions threaded, flanged or clamped
• Designed for aseptic applications
• Integra one gasket positioned out of the flow to avoid product stagnation
• Material: 316 stainless steel

When to choose it

This fitting is ideal for:

• High-hygiene systems (milk, yogurt, juices, beer, sensitive products)
• CIP/SIP processes
• Lines where it is essential to minimize stagnation points

DIN 11853 fittings: the compact version for product flow

DIN 11853 is very similar to 11864, but differs mainly in the length of the fitting , especially in the weld-on versions, which are generally shorter.

Main features

• More compact profile
• Mainly used for product passage lines
• Available in different shapes, materials and connection methods

When to choose it

Choose the DIN 11853 series when:

• You have little space available
• A hygienic connection similar to DIN 11864 is required
• The application involves welding with reduced dimensions

DIN 2353 nut and olive fittings: for service connections

Unlike the previous series, the DIN 2353 fittings are not used for the passage of food products, but for the management of service fluids.

Main features

• Used to connect metal tubes, stainless steel or other materials (plastic, etc.)
• Material: 316 stainless steel
• Available with:
  • food ogive → for low pressure
  • non-food ogive → for high pressure
• Applications: steam, water, auxiliary fluids, etc.

When to choose it

The DIN 2353 series is the right solution for:

• Steam circuits in food plants
• Cooling or washing lines
• Maintenance connections or auxiliary systems

How to choose the right DIN fittings for your system

To make your choice easier, consider these key criteria:

1. Type of fluid transported

• Food products → DIN 11851, DIN 11864, DIN 11853
• Service fluids → DIN 2353

2. Hygiene requirement

• Maximum hygiene / aseptic processes → DIN 11864
• Standard food plants → DIN 11851
• Compact lines → DIN 11853

3. Materials and operating environment

• In the presence of aggressive washes → prefer AISI 316
• For standard conditions → AISI 304 (available for DIN 11851)

4. Type of connection required

• Clamp for speed and convenience
• Threaded for safe seals and frequent disassembly
• Flanged for more complex systems or with specific needs

Choosing DIN fittings for industrial systems means carefully evaluating hygiene requirements, fluid type, operating pressures, and installation methods. Universalflex supports companies in the food & beverage and process industries in selecting the most suitable fittings. Our team provides a technical analysis that goes beyond the norm: we guarantee the selection of certified stainless steel components, optimizing the hygiene and longevity of your system in line with international standards.

Contact us for technical information or a personalized quote