Double-Acting Mechanical Seals

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

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 ESD44 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 ESD114 is most suitable for

• Formulated consumer products
• Pharmaceutical products and cosmetics