What is a Rotary Valve?
It is a compact mechanical device for continuously discharging bulk powders or granules under gravity flow. By definition it is the simplest of machines having only one moving part (ignoring the drive); a multi-vane rotor revolving in close contact in the housing and where the housing has an inlet at the top, and an outlet at the bottom.
Solution of the problem
The solids blow
through rotary valve type RV is a
space-saving and cost-effective feeding
instrument for pneumatic conveying. Similar to normal rotary valves,
bulk solids fall into the inlet of the rotor chambers, and are
then transported downwards when the rotor revolves. The
product however does not fall freely through an outlet
opening, but is blown out horizontally
through the integrated conveying pipe connection using conveying air
in the vacuum or pressure operation. Since
the conveying pipeline almost passes through the rotary valve, the
installation height is saved and the chambers are emptied
effectively. Blow through rotary valves are
manufactured with small tolerances between the rotor and the housing
to avoid the adverse effects of conveying air
flowing in the opposite direction to that of the mass flow.
Leakage air is dissipated through a lateral opening in the
housing, and fed back to, e.g. a storage
silo. Special leakage air collectors, if required with a granulate
inlet, are also used for the same purpose.
The solids blow through rotary valve is a simple and
cost-effective solution for many conveying
tasks:
- Only one
moving part (rotor), and therefore reduced maintenance costs
-
Installation height has been saved considerably due to the small
distance between the
integrated conveying pipeline connection and
the rotor axis
- Can be used for pressure and vacuum conveying
systems.
Bulk Solids
Grains
Powder
Fine
powder
Grease (only with special model)
Granules
Application procedures
Discharging
Metering
Feeding
Protective System
Advantages:
• Space-saving, less installation height due to
built-in conveying air
connections in the housing
• Large
capacity range
• High operational safety due to sturdy design and
cleaning effect by
blowing out the rotor chambers
•
Cost-effective owing to low installation investment
• Low
maintenance due to simple assembly
• Less leakage air
ROTARY VALVE ROTOR TYPES
-
- Rotary Valve - Ailocks-Star Feeder internal
Rotors have options such as blade, rounded type, adjusted blade
type, stripper and polyamide. Discharging
valve for fine and coarse-grained products
Max. capacity through ideal ratio of rotor volume and inlet cross section
Special inlet geometry purpose-built for gentle product handling
With feeding show also suitable for feeding bulk materials into pneumatic conveying systems at up to 1.5 barg (21 psi) -
PDF
brochure
ROTARY VALVe characterıstıcs
• Sizes (entry): Æ 175, 200, 250, 300 mm
• Delivery rate: 0.3 - 50 m³/h
• Pressure shock resistant and
flame penetration resistant up to 10 bar (overpressure) with a
DMT certificate
• 1) The housing contains: horizontal conveying
pipe with a connecting flange for a
pneumatic conveying
pipeline
• 2) Emptying by blowing out the rotor chambers
horizontally using conveying air
• 3) Robust cast housing made
of GG, GS, 1.4308, 1.4408
• 4) Pressure-tight shaft seal with
radial shaft sealing rings and sealing air connection
• 5)
Integrated leakage air dissipation
• 6) External bearing
•
7) Chain drive with a geared motor attached laterally
Drop Thru Rotary Valve Models
- 120mm DRAW- cad
- 180mm DRAW-cad
- 200mm DRAW valve -cad
- 220mm DRAW-Cad -cad
- 320mm Draw-cad
- 320mm Long Type Draw -cad
- 350mm Draw-cad
- 450mm Draw-cad
Blow Thru Rotary Valve Models
While pneumatic transport processes differ according to the phases, it may also diffrent in the same phase. Low pressure, that is dilute phase transfer, can be categorized under 2 classes, namely vacuum and pressure. This classification shows, even slightly, differences in the rotary valve - airlocks. Consequently, we perform manufactures according to the air locks to be used on the vacuum and pressure line.
ROTARY VALVE capacıty
Rotary airlock feeders have wide application in industry wherever dry
free-flowing
powders, granules, crystals, or pellets are used.
Typical materials include: cement,
ore, sugar, minerals, grains,
plastics, dust, fly ash, flour, gypsum, lime, coffee,
cereals,
pharmaceuticals, etc...
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