Siirtoruuvi • Screw conveyors

The screw conveyor is particularly suitable for industrial processes where the material has to be moved and processed at the same time.


Screw conveyors

Screw conveyor is cost effective and durable device in transferring different materials in various applications. It is ideal for transferring and handling of dry and semi -dry mediums. Compared to belt and and pneumatic conveyors screw conveyor needs less maintenance and is more cost effective investment. Screw conveyor is compact, versatile and flexible construction with different in- and outlets.

Screw conveyors are used typically in mixing, de-clumping, cooling, heating, diluting, shredding or drying.

We design and manufacture standard conveyors and tailor made applications for customer purposes. Conveyors are also available for ATEX-zone 21 and 22 (95/9/EY Category 2 and 3).

The Pipe screw conveyors are dust proof so they are suitable clean and safe production environments. We manufacture this of conveyors typically in sizes 100-2000 mm (flight diameter). Assembly inclination can vary from 0 to 90 decrees.

The Trough screw conveyor are available from 100 to 1500 mm (flight diameter).  Assembly inclination can vary from 0 to 45 decrees.

» Download brochure | Screw conveyors (Pipe)

» Download brochure | Screw conveyors (Through)



Screw pumps

The Archimedian screw pump are used to pump waste water and sludge at wastewater plants and other water treating facilities. Alternative assembly positions and locations, low maintenance and durability are typical advantages for screw pumps.

Screw pump material options are carbon steel and stainless steel.

» Download brochure | Screw pumps


Conveyor screws

Conveying screws are manufactured based on customers drawings or according Siirtoruuvi`s design.

Screw flights

Siirtoruuvi Oy manufactures also helicoid screw flights. They are formed in our special rolling machine by forming a steel strip into a continuous, smooth one-piece helix of the required diameter, pitch and thickness to fit conveyor screw pipes.

We stock standard sizes that enables fast deliveries. Upon request we manufacture helicot screw flights in other sizes and pitches.

By using cold forming method screw flights are stronger and more durable that the late flights.


» Download brochure | Screw flights



Dilution screws

Diluting screw conveyors are used in processes where controlled dilution of medium is a necessity.

Typically conveyor is designed with customer case by case to optimal usage.


Screw bottoms

Screw bottoms are for dismantling poorly running materials from bins, silos and tanks. Applications are such as biological waste, paper mass, wood chips, wood cutter and food flours and cement products. One conveyor has several screws.

Wide bottom area and several screws enables ability to handle difficult materials with continuous material flow.

Shredder screws

Shredding screw conveyors are typically used for mechanical shaping of medium.

The design and placing of the shredders are case sensitive and often decided with the customer based on experience and best practices.

Screw lifts

Screw lifts are maybe the most demanding screw conveyor type in process industry applications. High rpm, length of the lift screw and powerful gear motor set high demands for tolerances and balancing of the screws.

Siirtoruuvi Oy has delivered several screw lifts around the globe.

LEKO Conveyors

Our LEKO Engineering solutions include belt conveyors, scraper conveyors, elevators, receiving hoppers, funnels, screens, silos, ship loaders, ramps, support structures, and heavy or lightweight gangways.

We design, manufacture and install industrial material handling devices and systems according to the customer’s requirements. The choice between different conveyor types and models is influenced by the properties of the material to be transferred and suitability of the installation site.

We mainly supply all-in-1 conveyor process solutions but single conveyors are also included in our services as part of factory modernizations. LEKO Conveyors are used as material handling solutions in different industries alongside screw conveyors as well.

Typical sites using our products include sawmills, fertilizer plants, ports, mines, paper and pulp mills, and bio energy plants.