Soft Seal Cutting Ring

Soft Sealing Rings for DIN Fittings

While DIN-standard cutting ring fittings (e.g., DIN 2353) traditionally rely on a metal-to-metal seal created by a sharp-edged cutting ring biting into the tubing, "soft sealing rings" can enhance performance in specific applications.

Below is a breakdown of how soft seals integrate with DIN fittings, their use cases, and key considerations.

1. What Are Soft Sealing Rings?

Soft sealing rings are elastomeric components (e.g., O-rings, flat seals) made from materials like NBR (nitrile), FKM (Viton), or EPDM. They provide a flexible, leak-resistant seal by compressing between two surfaces. In DIN fittings, they are not standard but may be used in hybrid designs or modified systems for added sealing redundancy.

2. Why Use Soft Seals with DIN Fittings?

• Compensate for Imperfections: Soft seals can fill minor gaps in scratched or imperfect tubing.

• Vibration Damping: Absorb shocks in high-vibration environments (e.g., mobile machinery).

• Low-Pressure Systems: Improve sealing in systems where cutting rings alone may underperform.

• Frequent Disassembly: Allow easier maintenance without damaging the tubing (unlike cutting rings).

  
  

3. Compatible DIN Fittings with Soft Seals

Most standard DIN 2353 fittings do not include soft seal cutting rings. However,  Fitsch can offer hybrid solutions or alternative DIN-standard fittings that incorporate soft sealing.

4. Material Compatibility

5. Applications

• Hydraulic Systems: Hybrid seals for mobile equipment exposed to vibration.

• Food/Beverage: EPDM seals in DIN-compliant fittings for sanitary fluid lines.

• Chemical Transfer: FKM seals in acid-resistant stainless steel fittings.

• Low-Pressure Pneumatics: DIN 3861 fittings with O-rings for compressed air systems.

6. Products Specification

Ho2 Soft Seal Cutting Ring For DIN 2353 Tube Nut Fittings

DOZ Soft Seal Cutting Ring For EO2-Form Tube