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DIN11851 SEAL

The DIN11851 Seal (also known as the DIN 11851 D-Seal, D-Ring Gasket, or Dairy Coupling Seal) is a precision-engineered hygienic sealing element designed for DIN 11851 sanitary unions – the European standard for threaded dairy and food processing pipe connections. Also referred to as the "dairy thread" fitting, DIN 11851 unions are widely used across Europe and globally in food, beverage, dairy, pharmaceutical, and biotech industries.
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Key Advantages

  • Leak-Proof Reliability – Precision D-profile design ensures a tight, uniform compression seal, preventing leaks and protecting product integrity

  • Quick Installation & Maintenance – Simple drop-in placement enables rapid assembly and disassembly, reducing downtime during maintenance and cleaning

  • CIP/SIP Compatibility – All materials are suitable for Clean-In-Place (CIP) and Sterilize-In-Place (SIP) procedures, maintaining hygiene without disassembly

  • Versatile Industry Applications – Ideal for dairy processing, beverage production, food manufacturing, pharmaceutical production, biotechnology, and cosmetics industries

  • Full Regulatory Compliance – Certified to 3-A Sanitary Standards, FDA food contact regulations

  • Material Traceability – Full material traceability and optional certification available for quality assurance


  • How It Works

  • The DIN11851 Seal operates through a simple yet highly effective compression-sealing principle within a DIN 11851 union assembly

  • Placement – The D-seal gasket is placed into the dedicated groove on the male part (Gewindestutzen) of the DIN 11851 union

  • Alignment – The liner (Einlegestutzen) is brought into position, aligning its sealing face with the gasket

  • Compression – The slotted nut (Nutmutter) is tightened using a hook spanner (C-spanner), compressing the gasket between the male part and liner

  • Sealing – The D-shaped cross-section deforms under compression to fill the sealing gap completely, creating a crevice-free, leak-tight seal

  • Disassembly – Loosening the slotted nut allows for instant disassembly for inspection, cleaning, or gasket replacement



DIN11851 gasket material options EPDM NBR silicone PTFE sanitary seals

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CONTACT INFORMATION

If you have any questions or need help, feel free to contact with our team. We are available 24/7 by fax, 
e-mail or by phone. 
   valve@wzststeel.com
   +86-15858536788/+-86-577-86896059
  Binhai Industry Zone, Wenzhou, Zhejiang, China

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