01.12.2004Paul Bungartz GmbH&Co.KG, Germany 1 Special Centrifugal Pumps Proved for over 60 years in Fertilizer Industry Chemical / Pharmaceutical.

01.12.2004 Paul Bungartz GmbH&Co.KG, Germany www.bungartz.com

1

Special Centrifugal Pumps

Proved for over 60 years in

•Fertilizer Industry

•Chemical / Pharmaceutical Industry

•Power Plants


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Special Centrifugal Pumps

Bungartz system

• since 1930

• Contactless hydrodynamic shaft seal

• by back vanes or additonal seal expeller


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Advantages of System Bungartz

• Sealing of shaft clearance (rotating shaft – standstill casing) hydrodynamic by additional vanes

• During operation no extra seal required (for example stuffing box or mechanical seal)

Saving of a maintenance part


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Hydrodynamic sealing

HS

H2

H2

vanes

Back vanes


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Comparison

Bungartz-Pump

• No friction between packing and shaft

• No lubrication required

• No wear• No leaking during

operation

Pump with packing

• Friction between packing and shaft

• Lubrication required• wear• Leaking not avoidable


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Comparison

Bungartz-Pump

• Maintenance-freeSafety operation

during long operation

Pump with packing

• Regular check


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Type: MOR

• for small suction head

• < 3-4 mCl• with one impeller• vanes < back vanes


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Type: UMOR

• For high suction head

• Up to 30 mCl• With additional seal

expeller


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Heavy duty bearing bracket

• Big shaft

• Bearing design for worste case

There are pumps in operation, we have delivered 40 years ago


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Model M-UMOR

vanes

Back vanes

Seal expeller

Stuffing box

Circula-tion port

Centrifugal governor


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Design: M-MOR• wearing plates with

simple geometry

• wearing plates are cheap spare parts

• wearing plates are also available in materials with high hardness


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MOS (without flight governor)


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Design: SK-MOR• Welded construction

• Materials available, which are not castable

• for example Zirconium, Titanium, Tantal

• Using of homogeneous milled materials


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Design: E -MOR• Cast iron coated with

rubber


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Design: P-Si-MOR• Pump of Silicon Iron

• For very corrosive fluids (80%H2SO4, t = 160°C)

• additional amoured with grey cast iron


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Example for Applications

Fertilizer Industrie•Ammoniumnitrat

•Phosphoric Acid

•Sulphuric Acid

•Urea Melt


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Ammoniumnitrat (96-98%)

• With heating

• With heat detector connections

• With drain device• With Connections for

flushing


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Ammoniumnitrat (96-98%)


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98% AN - Melt

• Liquid near the boiling point

• Special pump with low NPSH


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• 99,6% AN-Melt

• T = 175°C


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Ammoniumnitrat (max 70%)

• With mechanical seal

• Throttle bushing


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Sulphuric Acid

• Horizontal Pump– Type MOR (98% Sulphuric Acid, tmax 90°C)– Type P-Si-UMOR ( Sulphuric Acid, t > 100°C,

with solids)

• Vertical Pumps– With bearing in the liquid– Without bearings in the liquid


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Sulfuric Acid

• Duplexmaterials• Nickel based alloys• Silicon Iron


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Sulphuric Acid

• Hydrodynamic shaft seal

• T > 100 °C

• No problems with solids


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Sulphuric Acid


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Phosphoric Acid

• Horizontal Pumps Type M-UMOR

• Vertical Pumps Type T (without bearings in the liquid

• Material depending on the concentration and the solids (for example Gypsum)


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Phosphoric Acid

• M-MOR or

M-UMOR• With wear plates• similar Sanicro28• also for gascontaining

liquids


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Phosphoric Acid

• Without bearings in the liquid

• lenght up to 1,2m


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Nitric Acid

• For high suction heads

• 1.4301 (middle concentration)

• 1.4361 (high concentration)


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Nitric acid


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Urea Solution and Urea Melt

• T = 140 °C

Vacuum 0,3 bar abs


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Urea Melt• with stuffing box

• with heating


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01.12.2004Paul Bungartz GmbH&Co.KG, Germany 1 Special Centrifugal Pumps Proved for over 60 years in Fertilizer Industry Chemical / Pharmaceutical.

Documents

paul bungartz

avoidable slide

rubber slide

additional seal expeller

additonal seal expeller

flight governor slide

high hardness slide

packing regular check