The ERIKS Bonded Seal is a robust solution used for static sealing of bolt heads, nuts, screw connections and flange connections. The product consists of a metal ring bonded to a trapezoidal elastomeric sealing element. As standard ERIKS offer two types of design. One without or one with self-centering (type ZC) feature. The ZC type offers ease of installation ensuring the sealing element is centralized. The chemical resistance of the Bonded Seal depends upon the combination of the metal and the elastomer type. The temperature resistance mainly depends on the rubber material.
Other metallic materials (Aluminum, Brass, etc.) upon request.
Standard surface treatment on the Carbon Steel ring, for anti-oxidation ZnFe Zinc-iron with Cr+3 passivation
Layer thickness 8 tot 11 μm
Corrosion resistance to salt spray test of approx 100 hours or more according to ASTM B117 or ISO 9227
Other surface treatments (chrome, Nickel, etc.) upon request.
Construction
Trapezoidal rubber inner ring
Metal outer ring
Execution
Standard
ZC (Self Centralizing)
operation principle
Temperature range -30 °C up to +200 °C (depending on the rubber material)
The minimum bursting pressure depends on the tensile strength of the metal, therefore the diameters of the metal ring have an influence. When designing an application, a safety factor of 3x the maximum working pressure must be taken into account.
Selection Guideline
Very wide application in general industry. Particularly in fuel, HVA, hydraulic, food and beverage, heating and oil and gas applications.
For use in high pressure environments where copper rings cannot be used
Reliable static sealing due to configuration with metal ring as compression stop, therefore always the correct pre-tension of the rubber element.
Sealing both liquids and gases.
Added self-centering lip (ZC) on the inner diameter ensures correct centering on the position.
Medium to be sealed, temperature and environment determine which elastomer/metal combination should be used. Most commonly used combination is carbon steel with ZnFe Cr+3 coating with NBR rubber.
