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EKATO

Double-acting Mechanical Seals

Mechanical Seals for Zero Leakage and Challenging Requirements

Double-acting liquid-lubricated mechanical seals are the most common type for mixing applications. These seals can be used under nearly all operating conditions in a mixing vessel. They can also be designed as a gas-lubricated version in which a continuous supply of gas into the seal chamber maintains a marginal gap, thus preventing wear of the seal rings.

Function and application

  • Double-acting liquid lubricated mechanical seal for low pressure applications up to 7 bar (abs.)
  • Two identical pairs of seal rings in a back-to-back arrangement
  • Deliverable with short heat trap for cooling
  • Deliverable with water jacket on storage vessel for cooling

Advantages

  • Wear parts standardized by modular design
  • Double acting, even in low pressure range
  • Compact dimensions, suitable for small installation spaces
  • Ideal replacement for stuffing boxes
  • Designed for cost saving

Working limits

  • Operating pressure: vacuum...7 bar (abs.)
  • Vessel temperature: -50...+400°C
  • Shaft size: 40...220 mm
  • Sliding speed: 0...5 m/s

The EKATO ESD34N is most suitable for

  • Bulk chemicals
  • Polymers
  • Pharmaceutical products and cosmetics
  • Specialty chemicals
  • Formulated consumer products
  • Biofuels and bio refineries
  • Storage tanks

Function and application

  • Double-acting mechanical seal liquid lubricated
  • Two identical pairs of seal rings in a back-to-back arrangement
  • Ideal mechanical seal for applications in the medium pressure range up to 40 bar (abs.)
  • Use of the modular design opens up many different extension options
  • Mechanical seal most commonly used in agitators worldwide
  • Deliverable with short heat trap for cooling
  • Deliverable with water jacket for cooling

Advantages

  • Life cycle cost savings due to extremely solid construction
  • FEA ensures optimized stress distribution in every seal ring
  • Special spring designs ensure uniform pre-tensioned conditions even in cases of significant agitator shaft displacements
  • Almost zero-leakage under the roughest conditions

Working limits

  • Operating pressure: vacuum...40 bar (abs.)
  • Vessel temperature: -50...+400°C
  • Shaft size: 40...220 mm
  • Sliding speed: 0...5 m/s

The EKATO ESD34G is most suitable for

  • Bulk chemicals
  • Polymers
  • Specialty chemicals
  • Formulated consumer products
  • Pharmaceutical products and cosmetics
  • Biofuels and bio refineries
  • Hydrometallurgy

Function and application

  • Double-acting mechanical seal liquid lubricated for high pressure applications
  • Robust high pressure seal with four geometrically identical seal rings arranged back-to-back
  • Position of the seal rings remains unchanged, even when the pressure is reversed
  • Application in high pressure processes including supply systems - Maximum requirements for reliability
  • Suitable for frequent changes in pressure, extremely high temperatures and significant agitator shaft displacements

Advantages

  • Resistant to pressure changes
  • Resistant to agitator shaft displacements
  • No deformation of the mechanical seal under pressure
  • High temperatures possible / better heat dissipation
  • Minimal leakage
  • Extended life timeExtended life timeExtended life timeExtended life timeExtended life timeExtended life timeExtended life timeExtended life timeExtended life timeExtended life timeExtended life time

Working limits

  • Operating pressure: vacuum...100 bar (abs.)
  • Vessel temperature: -50...+400°C
  • Shaft size: 40...220 mm
  • Sliding speed: 0...3 m/s

The EKATO ESD64H is most suitable for

  • Bulk chemicals
  • Specialty chemicals
  • Hydrometallurgy

Function and application

  • Double-acting, liquid lubricated mechanical seal
  • Four geometrically identical, mounted mechanical seal rings
  • Ideal mechanical seal for large diameters in the medium pressure range up to 40 bar (abs.)
  • Available with short heat trap for cooling
  • Optionally with water jacket

Advantages

  • Robust against pressure change
  • Robust against shaft deflection
  • No mechanical seal deformation under pressure
  • Good heat dissipation
  • Minimal leakage

Working limits

  • Vessel pressure: vacuum...40 bar (abs.)
  • Vessel temperature: -50...400°C
  • Shaft diameter: 240...500 mm
  • Sliding speed: 0...5m/s

The EKATO ESD64G is most suitable for

  • Bulk chemicals
  • Polymers
  • Specialty chemicals
  • Sterile processes
  • Hydrometallurgy

Function and application

  • Double-acting mechanical seal liquid lubricated for slurry applications
  • Pair of product side seal rings extends into the vessel space
  • Surfaces are smooth and the design minimizes gaps to prevent dirty corners - thorough cleaning is possible
  • Sealing abrasive suspensions and sticky or crusty media (below liquid level, side entry installation)
  • Sterile seal construction (ESD44S) also available - any orientation possible

Advantages

  • No dirty corners, thorough cleaning possible
  • Can be sterilized
  • Solid design

Working limits

  • Operating pressure: vacuum...16 bar (abs.)
  • Vessel temperature: -50...+230 °C
  • Shaft size: 40...300 mm
  • Sliding speed: 0...5 m/s

The EKATO ESD 44 is most suitable for

  • Specialty chemicals
  • Formulated consumer products

Function and application

  • Ideal for sterile processes
  • Delivered in a complete sterile system including sterile installation
  • Seal liquid condensate cooled by a plate heat exchanger
  • Continuous sterilisation of the condensate by fresh steam

Advantages

  • Complete sterile system, mechanical seals and sterile installation from a single source
  • Ready-to-install cartridge unit
  • No gaps: ideal for sterile processes
  • ESD sterile installation operates virtually maintenance-free and consumes very little energy

Working limits

  • Operating pressure: vacuum...4.5 bar (abs.)
  • Steam temperature: 130°...150°C
  • Shaft size: 40...300 mm
  • Sliding speed: 0...5 m/s

The EKATO ESD ESD34/44S is most suitable for

  • Specialty chemicals
  • Pharmaceutical products and cosmetics
  • Biofuels and bio refineries

Function and application

  • Double acting mechanical seal liquid lubricated
  • Used for products with a high solids content and sterile processes
  • Perfect for high-speed shafts

Advantages

  • Easy to clean and sterilize
  • Extended life time, even on high-speed machines

Working limits

  • Operating pressure:vacuum...6 bar (abs.)
  • Vessel temperature: -20...+200°C
  • Shaft size: 40...220 mm
  • Sliding speed: 0...20 m/s

The EKATO ESD ESD114 is most suitable for

  • Formulated consumer products
  • Pharmaceutical products and cosmetics

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