DÜCHTING PUMPEN

MC-Mineral Cast    

Horizontal single-stage centrifugal pump in back pullout design.

• Pumping of abrasive and corrosive liquids 
• All components which are in contact with the liquid are made of SICcast®
• Suction flange: Axial 
• Discharge flange: Top (Vertical) 
• Closed impeller with three-dimensionally curved vanes 
• Impeller is key driven; reverse rotation (e.g. backflushing) is possible 
• Re-adjustable inclined gap between impeller and volute casing to optimize the efficiency and differential pressure after longer operation 
• Single acting, metal free mechanical seal DÜTEC® with springs located outside of the liquid (other seal types available)  
• Oil-lubricated antifriction bearings  
• Back pullout design (the complete rotating assembly can be removed while the casing remains on its position) 
• In many applications the wear life of SICcast® greatly exceeds convential materials 
• Available with heavy-duty bearing units for extreme applications 
• Optimized design ensures easy maintenance and long service life even under difficult conditions

Fields of Applications

Pumping of Corrosive and Abrasive Fluids

• Flue Gas Desulfurization                                                                        
• Incinerators
• Titanium Dioxide Production
• Desalination
• Wastewater
• Potash Production 
• Salt Solution Mining                   
• Cement Manufacturing
• Ammonia Phosphate Industry 

Materials

• Volute casing: SICcast®
• Impeller: SICcast®
• Shaft: 1.4462
• Mechanical seal: Silicon carbide (SIC)

Technical Data

• Pump Size: DN 32 to DN 300 (1 1/4" to 12")
• Max Pressure: 10 bar (150 PSI)
• Max Flow: 1500 m³/h (6600 gpm)
• Total Head: up to 90 m (300ft)
• Rotating Speed: up to 3600 rpm 

MCC-Mineral Cast    

Horizontal single-stage centrifugal pump in back pullout design.

• Pumping of abrasive and corrosive liquids 
• All components which are in contact with the liquid are made of SICcast®
• Suction flange: Axial 
• Discharge flange: Top (Tangential) 
• Closed impeller with three-dimensionally curved vanes 
• Impeller is key driven; reverse rotation (e.g. backflushing) is possible 
• Re-adjustable inclined gap between impeller and wear plate to optimize the efficiency and differential pressure after longer operation 
• Single acting, metal free mechanical seal DÜTEC® with springs located outside of the liquid (other seal types available)  
• Durable, oil-lubricated antifriction bearings  
• Back pullout design (the complete rotating assembly can be removed while the casing remains on its position) 
• In many applications the wear life of SICcast® greatly exceeds convential materials 
• The patented design allows the production of extremely large pumps at low costs
• Currently, the most advanced and durable technology for FGD absorber recirculation pumps 
• Available in retrofit design to allow for easy replacement of existing absorber recycle pumps with minimum modifications required. 

Fields of Applications

Pumping of Corrosive and Abrasive Fluids

• Flue Gas Desulfurization                                                                        
• Incinerators
• Water Treatment 
• Seawater Desalination         

Materials

• Volute casing: SICcast®
• Impeller: SICcast®
• Wear Plate: SICcast®
• Shaft: 1.503 (C45)
• Shaft sleeve: 1.4301 (1.4462)
• Mechanical seal: Silicon carbide (SIC)

Technical Data

• Pump Size: DN 400 to DN 1000
• Max Pressure: 6 bar (90 PSI)
• Max Flow: 20000 m³/h (88000 gpm)
• Total Head: up to 40 m (130 ft)
• Rotating Speed: up to 1200 rpm 

High Pressure Multistage Pumps

Multistage centrifugal pump in ring-section design.

• Center-line or foot-mounted casings available
• Wear rings in composite material (carbon fiber filled Peek) for smaller clearances while maintaining the same reliability and best efficiency
• Intermediate discharge flange available 
• Available with anti-friction or sleeve bearings, forced lubrication possible
• Jacket or shaft seal cooling possible
• Tailormade solutions available:
  • Pump dimensions can be adapted to customer requirements
• Shaft sealing by stuffing box or mechanical seal
• Axial thrust handled by balance disk or balancing drum
• Impellers and diffusers are cast by using ceramic moulds to get smooth surfaces for outstanding hydraulic performance
• Easy replacement of all wear parts 

Fields of Application

Handling of clean or slighly polluted, chemically neutral or aggressive liquids.

• Pressure boosting systems in industrial process
• Water supply and treatment
• Condensate production
• Boiler feed systems
• Hot water applications
• Descaling in steel plants
• Water Injection
• Oil & Gas - Applications (handling formation water)

Materials

Carefully selected depending on the application and adapted to the respective conditions. Available in almost any metal from cast iron to SUPER DUPLEX stainless steel. 

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Technical Data 

• Pump Size: DN 50 to DN 300 (2" to 12")
• Max Pressure: 250 bar (3600 PSI)
• Max Flow: 3500 m³/h (15400 GPM)
• Total Head: up to 2200 m (7218 ft)
• Rotating Speed: up to 3600 RPM

SICcast®- Mineral Cast 
 
Hard as a Diamond.

SICcast® is comprised of Silicon carbide (SiC) in a patented mixture with Epoxy resin that is cast into precision moulds under vacuum. The final material is completely corrossion resistant and exhibits a hardness close to daimonds, requiring the fittings to be machined with diamond tools. Thanks to the temperature-controlled casting process, parts of up to 8 tons can be cast. This material is extremely wear resistant, temperature insensitive and shockproof. It is mainly used in heavy conditions such as in flue gas desulfurization of coal-fired power plants, incineration plants, fertilizer production, titanium dioxide and iron oxide production.

Advantages

• Complete resistance to corrosion
• Extreme resistance to abrasion: 9.7 on Mohs' Hardness Scale
• Quality Control with high precision casting process
• Lower noise and vibrations when compared to metallic materials
• Significant cost advantage over Super Duplex and High Chrome materials

SIConit® - For aftermarket repair and material protection

A reparing kit with similar characteristics as SICcast®

SIConit® is a silicon carbide coating compound for the repair and protection of metallic surfaces exposed to abrasion, corrosion and acids with a pH-value of 0 - 12.  SIConit has a very high silicon carbide content for use in extremely abrasive operational conditions where complex and costly repairs are the norm. The compound can either be used to completely rebuild worn metal surfaces or be used as a preventative coating, often outperforming the original metal in terms of abrasive stability. SIConit® can be used in place of metal applications, tiling, rubber backing and other coatings.

The entire SIConit® product spectrum

SIConit coatings are available with various silicon carbide grain sizes, offering unique application and performance characteristics. 

• SIConit®
  •  trowelable wear protection
• SIConit® K
  • castable wear protection
• SIConit® M
  • trowelable wear protection for areas such as pores and joints
• SIConit® X
  • brushable wear protection for smooth surfaces and for optimizing efficiency 
• SIOSIC®
  • an inorganic high-temperature wear and corrosion resistant material based on silicate technology
• SICcast® Plus
  • silicon carbide ceramic