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HM11D- Double Dry Gas Seals for Media Containing Particles
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HM11D- Double Dry Gas Seals for Media Containing Particles


HM11D- Double Dry Gas Seals for Media Containing Particles

  • Two seal modules are oriented in the same direction behind each other. The mating ring on the process side is grooved at inner diameter side and the mating ring on the atmosphere side is grooved at outer diameter side. A barrier gas e.g. nitrogen or instrument air is injected between two seals. The pressure of barrier gas is 0.2MPa above the seal chamber pressure. The cleanliness of the barrier gas is 1μm;
  • With high reliability for the media containing particles (up to 15% particles content);
  • Without contaminating the product to assure the high purity of process media;
  • Pump cavitation and evacuation cannot deteriorate the seal performance;
  • The seals are non-contacting, the power consumption is only 10% of traditional double mechanical seals, and the life is above 3 years;
  • Because of non-contacting, there is very little heat generated by the friction, so forced circulation and quenching are not needed.


  • Zero-Fugitive Emissions;
  • Cartridge structure,easy to install and positioning accurately;
  • Simplified gas barrier system.   

Performance Capability:

  • Temperature:-60~200℃;
  • Pressure:≤2.5MPa;
  • Speed:500~3000rpm;
  • Application:for use in media containing particles (up to 15%).

HM11D Double Dry Gas Seals P&ID




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