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Mechanical Seals Group HD

Dynamic high pressure seals for installation spaces in accordance with DIN norm. Equipped for up to 25 bar. Variety of materials makes them suitable for many different applications.

As the spring assembly doesn´t come into contact with the product, these mechanical seals, even in contaminated media, are longer-lasting and more durable.

HD 21
Dynamic, single-acting mechanical seals, multiple spring-loaded
HD 21
HD 21


  • pressure balanced, dynamic construction type
  • externally-flushed and self-flushed depending on requirements
  • multiple spring-loaded
  • Spring outside of pumped medium
  • independant of rotational direction
  • temperature dependent on the auxiliary seals
  • applicable up to 25 bar
  • V umax. = 15 m/s

Different Versions for Individualisation
Construction Materials:
1.4571, 1.4462, HC4

Materials Rotary and Stationary Ring:
Silicon Carbide, Tungsten Carbide, A/B Carbon

Materials Auxiliary seals:
NBR, Viton (FDA), EPDM (FDA), Kalrez, PTFE

Other Materials:
subject to enquiry

Dimensions / Sizes:
in accordance with DIN norm up to 100 mm, above that subject to enquiry

+49 (0) 5223 - 18 96 4 - 0
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