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IL-BTO – Stainless Steel In-Line Mechanical Seal Chemical
Process Pump

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  • Ideal for pumping fluids with solids concentrations up to 40%
  • In-line process pump with a removable lower casing cover
  • Extremely robust construction
  • Time-saving assembly and disassembly concept
  • Vertical in-line configuration taking up little space

IL-BTO BrochureOrder »
IL-BTO Fact Sheet


Operation Range
Capacities 1 to 550 m3/h
Heads 5 to 125 m
Pressure rating PN 16
Temperatures -30°C to +200°C
Kinematic viscosities 0.5 to 350 mm2/s
Solids handling Highly suitable
Casing Materials
Stainless steel 1.4581 (316Ti)
Other materials

Stainless steel (e.g. 1.4306, Uranus® B6), duplex alloys (e.g. 1.4517),
nickel-base alloys (e.g. Hastelloy® C-4, C-22), nickel (e.g. 2.4170),
titanium (e.g. Grades 2, 5 and 7)

Working Principle
Radial flow pump
Stages Single stage
Priming Method
Flooded suction
Sealing System
Double mechanical seal
Single mechanical seal
EN standard configuration Frame-mounted (-30°C to +200°C)
Additional options Vertical, in-line
EC Directives
2006/42/EC (Machinery), 2014/34/EC (ATEX)
Standards DIN EN ISO 5199

Materials of construction

Stainless steel (e.g. 1.4306, Uranus® B6)
Duplex alloys (e.g. 1.4517)
Nickel (e.g. 2.4170) and nickel-base alloys (e.g. Hastelloy® C-4, C-22)
Titanium (Grades 2, 5 and 7)

Connection flanges To EN 1092-1
Drilled to ANSI/ASME B16.5
Additional connection Manometer connection on the casing
Gasket materials PTFE-enveloped
Gylon® blue
Plug seal material PTFE

Mechanical Seal
Double mechanical seal Standard commercially available
Single mechanical seal Standard commercially available

Double Mechanical Seal Barrier/Buffer Fluid Vessel
Vessel Cooling coil, manometer, thermometer and sight glass
Total volume from 3 to 12 l (depending on vessel type)
Hand refill pump (depending on vessel type)
Vessel connections Stainless steel braided PTFE hose
Stainless steel piping
Bracket Steel
Stainless steel

Pump Protection
Barrier/buffer fluid monitoring Level switch
Pressure switch
Temperature probe
Motor load sensor

Type Stand
Material Cast iron
Drip pan

Bearing Frame
Lubrication Grease lubrication
Coupling guard Steel

Range Curves

Range Curves

IL-BTO Range Curves 50 Hz
IL-BTO Range Curves 60 Hz
Dimension Drawings

Dimension Drawings



  • Chemical processing:
    basic and fine chemicals
    (agrochemicals, speciality chemicals)
  • Pharmaceuticals
  • Biotechnology processing
  • Food and beverages
  • Pulp and paper


A wide variety, including:

  • Processes with suspensions


Aggressive, toxic and low-boiling fluids. For example:

  • Dichlorobenzene
  • Toluene 2,4-diisocyanate (TDI)
  • Toluenediamine (TDA)

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