Double Balanced Mechanical Seal DBS 920 Series & DBS 925 Series are factory assembled cartridge units used on mixers, agitators & reactors. This seals are designed for handling severe services including products emitting toxic vapours during reaction process. The designs incorporates bearing located very close to the seal. This standard feature effectively arrests the shaft whip for smooth and trouble free operation enabling enhanced seal life. The cooling jacket, also a standard feature, helps to maintain cool environment around the seal. Large clearance between the rotating shaft/sleeve and mating ring permits higher deflection of the shaft, invariably associated with top entry agitators.

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Applications:

Petrochemicals, General Chemicals & Light Hydrocarbons Emitting Vapour & Pharmaceutical Industries

Seal Components/Face:
  • Carbon/ Ceramic
  • Carbon / Silicon Carbide
  • Carbon / Tungsten Carbide
  • Secondary Seal : DBS 920 Series: PTFE, GFT
  • Secondary Seal : DBS 925 Series: Inboard -PTFE, GFT / Outboard-Elastomers
  • Metal Parts: SS304, SS316, Hastelloy-C, Hastelloy-B, Monel, Alloy-20, Carbon Steel
Seal Characteristics:
  • Double Acting Back to Back
  • Balanced
  • Cartridge Unit
  • Independent of Direction of Rotation
  • Operated with Pressurised Barrier Fluid
Operating Parameters
Shaft Dia 25 to 150 mm
Pressure Vacuum to 35 Bars (max)
Temperature Ambient to +200°C
Speed Up to 600 rpm
Barrier Fluid Pressure Vessel Pressure +1.5 Bar
Diagram