Din 11864-3 Principle And Maintenance Of Aseptic Gasket Clamp Sealing

For pharmaceutical and biotech applications, the DIN 11864-3 aseptic liner clamp provides zero-dead-leg sealing through an O-ring seated in a precision-machined groove combined with metallic centering. Constructed from SS316L stainless steel in sizes DN10 to DN100, this clamp connection eliminates crevices where product residues could accumulate and microorganisms could proliferate. The connection supports SIP and CIP protocols while maintaining sterile conditions during fluid transfer, with pressure ratings up to 40 bar and temperatures from -10°C to +140°C.

Sealing Principle and Dead-Space Elimination

• The din 11864 3 clamp connection uses an O-ring in a precisely turned groove, creating a dead-space-free seal.

• Metallic centering ensures accurate alignment of the ferrules during assembly.

• Defined compression of the O-ring provides a lasting seal under thermal cycling.

• This design prevents biofilm formation and product deposits in the connection zone.

Design Variants and Component Compatibility

The DIN 11864 standard comprises three parts for aseptic applications. Part 1 covers threaded connections (din 11864 1), Part 2 covers flange connections (din 11864 2), and Part 3 covers clamp connections (din 11864 3). The clamp ferrules are available with groove or collar configurations and are designed for butt welding to tubes according to DIN 11866 series A, B, or C. Blind ferrules enable temporary or permanent sealing of pipe ends while maintaining sterile conditions.

Technical Specifications

Pharmaceutical and Biotech Applications

• Bioreactor connections: the din 11864 1a and din 11864 3 variants secure sterile transfer lines for cell culture media and harvest streams.

• Chromatography systems: column packing and buffer preparation lines utilize aseptic clamp connections for rapid assembly and breakdown.

• Filtration and fill/finish: the din 11864 3 connection ensures sterile integrity in final product filtration and filling operations.

• Single-use system integration: aseptic clamp connections enable clean, rapid changeovers for multi-product facilities.

Installation Workflow

1. Position the O-ring in the groove of the grooved ferrule or between the two ferrules.

2. Align the ferrules with metallic centering for precise mating.

3. Place the liner clamp around the ferrules and secure with the tightening mechanism.

4. Apply the specified torque to achieve correct O-ring compression.

5. Verify seal integrity through pressure testing or leak detection.

Maintenance and Validation

• The din 11864 2 flange and din 11864 3 clamp connections require regular inspection of the O-ring for compression set, wear, or chemical attack.

• The clamp mechanism should be checked for proper function and even compression.

• For applications with high sterility requirements, torque specification must be validated.

• Surface finish (Ra < 0.8 µm) should be verified periodically to ensure cleanability.

Engineering Value for Aseptic Processing

The DIN 11864-3 clamp connection reduces contamination risks through its dead-space-free sealing design. The standardized system ensures interchangeability across equipment from different manufacturers. Compliance with EHEDG and 3-A standards ensures the clamp meets regulatory requirements for pharmaceutical and biotech facilities. The quick-connect design enables rapid changeovers and cleaning validation, reducing downtime between batches.

Proper clamp selection ensures reliable aseptic connections. Choose SS316L stainless steel for corrosion resistance, verify surface finish meets Ra < 0.8 µm, and select O-ring material compatible with process fluids and sterilization methods.

1. Select connection type (din 11864 1 for threaded, din 11864 2 for flanged, or din 11864 3 for clamped) based on application requirements.

2. Verify size (DN10 to DN100) matches tube dimensions according to DIN 11866 series.

3. Choose O-ring material (EPDM for general use, Viton for high temperature, FEP-encapsulated for chemical resistance).

4. Confirm pressure rating (up to 40 bar) and temperature range (-10°C to +140°C) meet process conditions.

These measures ensure sterile, leak-proof connections. Properly specified DIN 11864-3 aseptic liner clamps deliver reliable, zero-dead-leg performance in pharmaceutical and biotech production environments.

DIN 11864-3 Aseptic Liner Clamp

• This Tri clamp connection couplings set fully follows the regulation in DIN 11864-3 standard. Material needs to be 316L to meet aseptic requirement of food, chemical and pharmaceutical industries. 
• It is available in virtually all sizes, standards and configurations and it means you can optimize conditions inside your process whilst you are maintaining security on the outside according to different requirements. In addition to the quick connect we offer sterile unions threaded connections  and sterile flanged connections for maximum security. The design incorporates use of a standard dimension o-ring which gives flexibility of material choice.

Product Description

Product Parameter