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Drop-through rotary airlock valve

  • Essai
  • Plan d'accès
drop through rotary valve under dust collector
ATEX certification Palamatic Process

Drop-through rotary airlock valve - Extraction and feeding of bulk materials 

4 models: rate from 2.2 to 19.5 liters/rev.
Cast iron or stainless steel manufacturing

Rotary airlock valves are designed for bulk material extraction and dosing operations.

Logo test center Palamatic Process

Rotary airlock valves are used for the dosing, feeding or discharging of fine-grained and powdered materials or granulates contained in silos, hoppers, pneumatic conveying installations, filters or even cyclones.


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Equipment advantages

- Compact and robust design

- Easy access to internal mechanical parts for a quick and simple cleaning

- ATEX version 

- High feeding accuracy


View our equipment in photos

rotary valve bulk materials handling

Dosing rotary airlock

Cast iron or stainless steel body.

screw feeder rotary valve dextrose alumina

Rotary valve under hopper

The drop-through rotary airlock valve feeds and discharges your bulk materials and raw ingredients in a controlled way.

screw feeder rotary valve coloring agent pigment

Drop through rotary valve on industrial production line

The primary function of a rotary valve is to regulate the flow of the bulk material between two vessels while maintaining a good airtightness.

screw feeder rotary valve starch maltodextrine

Hopper fitted with a rotary valve

Storage and conveying for dissolution of sugar in a weighed cast iron tank.

The processed bulk materials, here beet sugar and cane sugar, are vacuumed into a continuous discharge cyclone via a rotary lock to the dissolution tank.

screw feeder rotary valve dextrose sugar

Easy access to the mechanical parts

Easy access to internal mechanical parts for easy cleaning.

screw feeder rotary valve animal wheat

Rotary airlock on pneumatic conveying

For extraction and dosing the bulk material at the outlet of the cyclone.

screw feeder rotary valve flour salt

Pneumatic conveying feeding

The rotary valve is used for the continuous depacking of bulk solids and raw ingredients from silos, hoppers, pneumatic conveying systems, filters and cyclones.

screw feeder rotary valve carbon black

Drop through airlock rotary valve

Gearmotor on a drop through airlock rotary valve.

screw feeder rotary valve milk powder

Palamatic Process rotary valve

Effective for the treatment of all types of powders: cocoa, sugar, flour, granules...

screw feeder rotary valve sulfate soya

Rotary valve for dust collection

The rotary dust collector is suitable for simple and not very demanding industrial applications, where its main function is that of an airlock.

drop through rotary valve pneumatic conveying

Rotary valve for pneumatic conveying applications

The ERI 200² rotary airlock valve for continuous discharge into the mixing tank.

bulk bag filler

Dosing rotary valve

ATEX version for explosion and flame resistance.

food industry rotary valve

Rotary valve for food powders

Airlock valve for maltodextrin dosing.

palamatic process drop through rotary valve

Dosing and conveying rotary valve

Rotary airlock valve on maltodextrin discharge and conveying line.

rotary valve food industry

Rotary lock under cyclone separator

Discharge of maltodextrin bags and their transfer to a mixing tank.

drop through rotary valve under hopper

Rotary valve under hopper

Food additive dosing line with cleaning in place of all equipment.

rotary valve big bag discharging station

Rotary valve under big bag discharging station

Feeding of a dissolution tank for atomization on a drying tower.

Rotary valve sugar industry

Sugar industry application

Production line for confectionery products.

mechanical conveying mixing line

ATEX rotary valve for milk powder handling

The rotary valve allows the extraction at the outlet of the vibrating conveyor and the dosing of the milk powder into the hopper

rotary valve

Drop through rotary airlock

The airlock is positioned under a big bag emptying station for silica handling.

dosing pneumatic line

Pneumatic line with integrated dosing

Mixing and feeding line for raw materials for cementing.

drop through rotary valve powder

Rotary valve for bulk materials handling

The rotary valves are designed for continuous feeding and pressure tightness between the upstream and the downstream process.

bulk handling drop through rotary valve

Powder handling - Rotary valve

From 2.2 litres/rev. to 19.5 litres/rev.


Technical specification

4 models: 150², 200², 250², 300²

The drop through rotary airlock valves are designed to feed and discharge in a controlled way powders and bulk materials coming from silos, hoppers, pneumatic conveying installations, bag filters houses, cyclones. This rotary airlock valve is suitable when a high throughput is required. The effective flow rates are very variable depending on the materials flowing.

Technical specifications:

Modèles 150² 200² 250² 300²
Volume per revolution (liters) 2.2 5.4 10.9 19.5
Flange section in mm 150*150 200*200 250*250 250*250


Variable filling coefficient depending on the material being conveyed and the speed of rotation:


Manufacturing materials Cast iron or stainless steel
Rotor surface treatment Nickel plating, tefloning, hardened paddles
Motorization Direct or chain sprocket
Rotor Steel or stainless steel
Rotor set speed 10, 20, 30 rev./min.
Variable speed of the rotor 4-35 rev./min.
Capacity 2.2 to 19.5 liters/rev.


Example of implementation:

drop trough rotary airlock valve implantation
Drop through rotary airlock



Available options

  • Rotary valve - Bulk materials and powder handling
    Rotary valve - Bulk materials and powder handling

    Manufacturing material

    Manufacturing material adapted to your needs and expectations. 
    Three different configurations are available:  steel design, stainless steel body and cast iron flange or even the full cast iron design. The aluminium configuration is anodized.

  • Rotary valve ATEX - Bulk materials and powder handling
    Rotary valve ATEX - Bulk materials and powder handling

    ATEX rotary valve

    For zones 20 / 21 /22. ATEX version for explosion and flame resistance.

  • Rotary valve for granulates - Bulk materials and powder handling
    Rotary valve for granulates - Bulk materials and powder handling

    Deflector for granules

    The design highly respects the granular and bulk materials.

    • High degree of filling
    • Large degassing nozzle
    • Strong design
    • Available with direct motorisation or by chain
    • Drilled flanges according to PN10, ANSI 150 lbs and JIS
    • Versions compliant with ATEX 94/9/CE are available
  • Rotary valve - Bulk materials and powder handling
    Rotary valve - Bulk materials and powder handling

    Easyclean rotary valve

    For a sanitary using in the food and pharmaceutical industries. 
    The rotary valve gets a rotor which can be easily dismantled in few minutes for controlling and cleaning the inside parts. The extraction mecanism of the moving parts is more secured for the operator and offers a better flexibility for the cleaning and maintenance of the installation between various productions. These stainless steel rotary valves can be dismantled easily as well as keeping the highest standards of hygiene.

Case studies
  • Preparation of milky drink

    Processed powders: milk powder and sugar - Preparation of milk drinks - Agribusiness group in the Island of Reunion, this company is a leader in most markets in which it operates: fresh dairy products...
  • Icing sugar line

    Processed powder: starch and granulated sugar - Icing sugar line - French sugar cooperative company - Supply and commissioning of a set of machines for the production of icing sugar and starch to feed...
  • Paint formulation

    Processed powder: paint powder (polyester resin + fillers + additives + pigments) - Paint formulation - A manual container emptying station feeds a big bag filling system. The container unloading...
  • Cake mix

    Processed powders: modified starch, sodium bicarbonate, fat powder, whipping base, gelatin, milled sugar - Cake mix - Company based in Saudi Arabia that manufactures and distributes dry food materials...
  • Animal nutrition food supplements

    Processed powders: silica, clay, calcium carbonate, lithothamnium - Animal nutrition food supplements - This customer is a producer of specific mixtures of botanical extracts. In order to ensure its...
  • Premix manufacturing

    Processed powders: silica, wheat, carbonate - Premix manufacturing - The installation consists of a new mixing line for the production of natural additives for animal nutrition.
  • Blower for feeding containers

    Processed materials: crushed egg shells - Blower for feeding containers - The purpose of the equipment is to collect crushed egg shells from a centrifuge / crusher placed downstream of automatic...
  • Refined sugar conveying

    Processed material: refined sugar - Refined sugar conveying - On-site installation of repackaging equipment for the transfer of sugar stored in shipping containers with an inner liner to a bulk bag...
  • Refiom processing line

    Processed products: fly ashes and ash embers - Refiom processing line - Big bag filling in thermal power plant in a household waste incineration plant.
  • Premix compound packing

    Treated powder: premix compound - Premix compound packing - Our customer, a specialist in PVC compounds and polymer composite materials, required the packing of its finished product - polymer...
  • Milk powder mixing line

    Processed powder: infant milk powder - Milk powder mixing line - The mixing line is totally cleanable with the complete dismantling of the equipment with our Palamatic-EasyClean range of equipment.
  • Sugar grinding unit

    Processed powders: icing sugar from white granulated sugar and starch - Sugar milling unit - The installation consists of feeding the mill with granulated sugar and then packaging the resulting icing...
  • Unloading big bags containing grains and cereals

    Process products: wheat bran, wheat flour, disinsected wheat bran - Unloading big bags containing grains and cereals - This big bag emptying station aims to feed insects (larvae and adults) with dry...
  • Insect breeding unit

    Processed products: bran, meal, droppings, live insects, dead insects - Insect breeding unit - This workshop is the heart of the insect breeding process.
  • Grinding and packaging of finished products

    Processed products: dried insects - Grinding and packaging of finished products - Workshop for processing and packaging products for the animal nutrition sector.
  • Manufacturing line for petfood industry

    Processed Powders: Soy Flour, Brewer Yeast, Corn Starch, Dried Whey... - Manufacturing line for petfood industry - Manufacturering of dry and liquid flavor enhancers for the pet food industry
  • Unloading and conveying of cement

    Processed powder: cement - Unloading and conveying of cement - Unloading of cement from 1 ton big bags with pneumatic transfer of material to silo storage
  • Confined deconditioning, dosing and transfer of powders

    Processed powders: Minerals and additives (such as titanium dioxide) for the manufacture of paints - Emptying of big bags into mobile IBCs with dosing and transfer of the product to a mixer downstream...
  • Process for mixing dry ingredients

    Processed Materials: Granulated Sugar, Rebaudioside M, Cocoa Powder and various minor ingredients - Process for mixing dry ingredients - The new facility expansion project required the capabilities of...
  • Bucket filling line

    Material: Graphite - Bucket filling line - Turnkey solution for big bag emptying, total containment and rapid filling of buckets with graphite powder.
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