DG - heat exchanger gaskets

DG - heat exchanger gaskets

DG solves problems due to insufficient seal elasticity and prevents leakage of pollutants into the environment. Suitable in conditions where cooling and reheating of the flange takes place. Economical solutions for low emission escape requirements.

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DG solves problems due to insufficient seal elasticity and prevents leakage of pollutants into the environment.
  • Also suitable for applications with low initial tightening torque.
  • Suitable in conditions where cooling and reheating of the flange takes place.
  • Economical solutions for low emission escape requirements.
Typically, graphite is applied to the metal core of the gasket only in a single density thus providing the single density benefits. DG application provide the benefits of both high and low density graphite.

Construction - characteristics:
  • The supporting part is formed by a corrugated metal core, which is covered with flexible graphite of different density and thickness.
  • The construction provides better sealing properties than standard gaskets.
The corrugated shape increases the ability to return to its original state and reduces the surface of the gasket at the beginning of the tightening. At the same time, it reduces the contact pressure value needed to achieve the sealing function.
  • This results in the stability of the bolts and the increased stability of the compressive force during the temperature cycles.
The production process of laying the graphite onto the surface of the metal core ensures its application without pores, which occur in gaskets of graphite plates.
  • Variable combinations with different bars and dimensions can be manufactured according to the customer's request.
Sealant - expanded graphite
  • Adaptive to a flange unevenness
  • Free of additives and adhesives (high purity)
  • Chemically resistant
  • Reduced porosity
  • Thermally conductive
  • Low thermal expansion
  • Not manufactured by rolling process - the properties are uniform in all directions
Metal core
  • 316/1.4401 
  • 304/1.4301
Quantity Value
Working temperatures - oxidizing atmosphere: -200 °C - +450 °C
Working temperatures - steam: -200 °C - +650 °C
Max. working pressure: vacuum to 306 bar (depending on temperature and size)
pH chemical resistance: 0 - 14
Graphite specific gravity: 0,64 and 1,83 g/cm3
Calculation parameters: Y = 35 MPa; m = 3
Circular rings widths:
9,5 mm 11,10 mm 12,70 mm 15,90 mm
19,10 mm 22,20 mm 25,40 mm  
Metal core thickness:
  • 1,6 mm
  • 3,2 mm

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