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Curved Blade Disc Closure Turbine
The Curved Blade Disc Closure Turbine is a radial-flow gas-dispersing impeller for pressure reactors. It starts from the curved blade disc turbine and adds two ring plates that enclose the blades, forming a gas-holding chamber inside the impeller. The enclosure raises the gas handling capacity well above that of the open disc turbine. Typical duties are hydrogenation and other gas-liquid reactions in chemical processing.
How it works
Gas reaching the impeller is held in the enclosed chamber and thrown outward by the blades. The radial force breaks the bubbles into a fine dispersion and distributes them through the liquid, which favors the gas-liquid reaction. The same radial flow suspends solids at low liquid level. In the quick-selection table, disc turbines run at 100 to 350 r/min in low to medium viscosity liquids and are the strong-shear, gas-dispersing type, with medium speed and high energy consumption.
Impeller diameter runs from 30 to 2,000 mm on shafts of 10 to 300 mm, with 4, 6, 8 or 10 blades. Materials are carbon steel, SS304, SS316, titanium, nickel, Hastelloy B or C, Monel, zirconium, Inconel and tantalum. Standard impeller and shaft pairings are tabulated below.
Impeller Dj (mm) 250 320 400 500 630 800 900 Shaft d (mm) 30 35 45 55 65 75 80 What is included
- Enclosed curved blade disc turbine in the selected diameter, blade count and material
- Shaft and hub interface: per project datasheet
Specify for your project
- Impeller diameter within 30 to 2,000 mm and shaft diameter within 10 to 300 mm
- Blade count: 4, 6, 8 or 10
- Material: carbon steel, SS304, SS316, titanium, nickel, Hastelloy B or C, Monel, zirconium, Inconel or tantalum
- Duty: gas type and rate, liquid viscosity, solids to be suspended, mixing speed
- Reactor vessel and drive the impeller mounts on
This description defines the product family. Guaranteed performance, included hardware, exclusions, interfaces and acceptance criteria are stated only in the project-specific technical proposal and approved datasheet.
Technical Requirements
- Diameter of impeller: 30~2000 mm
- Diameter of shaft: 10~300 mm
- QTY of impeller: 4, 6, 8, 10
- Available material：CS, SS304, SS316, Titanium, Nickel, Hastelloy B/C, Monel, Zirconium, Inconel, Tantalum
Impeller Dj(mm) Shaft d(mm)
250 30 320 35 400 45 500 55 630 65 800 75 900 80 Quick Selection
Type Mixing speed Application Feature Marine propeller
Broad blade Propeller
100-500r/min Low viscosity Low shear, low energy consumption
Strong circulation
High-speed operation
Paddle type
- Straight blade
- Pitched blade
- Curved blade
50-200r/min Medium viscosity Close to the tank wall
Heavy duty, slow operation
High energy consumption
Inefficient mixing
Turbine type
- Straight blade
- Pitched blade
- Curved blade
50-350 r/min Low viscosity
Medium viscosity
Medium shear and cyclic
Medium speed operation
Suitable for medium equipment
Disk turbine (Flat blade, pinched blade,
curved blade, )
100-350 r/min Low viscosity
Medium viscosity
Strong shear, gas dispersion
Medium speed operation
High energy consumption
Frame type
Anchor type
Helical Blade
20-150 r/min High viscosity Low shear and speed
Strong cycle ability
High energy consumption
Self inducing type
200-500 r/min Liquid-gas mixing
Strong self-inducing capacity
High gas consumption
High speed operation
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