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.
Table of Contents
Liquid Lubricated Mechanical Seal for low Pressure Range ESD34N
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
Double-Acting and Liquid Lubricated ESD34G
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
High Pressure Seal ESD64H
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
Liquid Lubricated ESD64G
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
Product Lubricated Mechanical Seal ESD44
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
Sterile Seal ESD34/44S
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
High Speed Mechanical Seal ESD114
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
