In the rotating sieve, the sifted product falls centrally onto the sieve and is forced out. Thus, the finest component of the product is separated from the coarser component, which falls on the sieve. The La Meccanica rotary sieve is characterized by high performance, low energy consumption and no vibration. Very compact machine, but at the same time very efficient, great for cleaning pellets or sorting flour.

  • Function and characteristics of rotary screen:

    The rotary screen consists of a screening grate rotating in a cylindrical chamber.
    In a rotary screen, the sieved product falls centrally onto a sieve and is centrifuged towards the outside. In this way, the finer part is separated from the larger part of the product flowing onto the screen. The efficiency of the screen is ensured by the shape of the steps of the sorting sieve.

    Areas of use:

    • After granulation and cooling line
    • After pressing and drying line
    • In front of the hammer mill
    • Before the filling line
    • In bulk cargo line


    • High performance
    • Low power consumption
    • No vibrations
    • Small footprint
    • Low maintenance cost
    • No damage to the pellet


Rotary screen SRT-2000
Bulk granules Tone/h (diameter 3.5mm) up to 50
Capacity chopper Tone/h up to 30
screening surface 2.9 m² 31.21 ft²
Engine power kW 2,2
Revolution per minute RPM (50Hz) 200
Mass of rotating auger
(including engines)
993 kg 2189.2 pounds


The rollers are adjusted by a hydraulic piston driven by a hydraulic device located outside the machine and controlled from the control panel.

The position of the rollers is calculated by means of an angular potentiometer mounted behind the rollers (inside the main shaft). The potentiometer signals the angular position of the roller pins. By operating the entire system from the control panel, the distance between the rollers and the die can be calculated using the signal transmitted by the potentiometer.

At the electronic panel, the operator chooses the roller position. The panel pressurizes the hydraulic circuit and moves the piston until the rollers reach the desired position.

From the electrical panel, the operator determines the position of the rollers by applying pressure to the hydraulic system and moving the piston until the rollers reach the desired position. Once the desired position has been reached, the system is locked and held in position by two valves.

The maximum pressure reached by the hydraulic system is 250 bar, and the required pressure for moving the piston and adjusting the rollers is 150 bar.

The adjustment is done quite quickly: you can move the rollers closer or further away from the matrix by 7-8 mm, in each direction in about 15 seconds.

For more information, watch the following video: Automatic Rollers Adjustment (WAP System)

rapid bloc quick device for change dies.jpgrapid bloc quick device for change dies-2.jpg

The device allows replacing the matrix in 10-20 minutes, depending on its size. The system includes a tapered stainless steel ring that is closed and held in place by Belleville disc springs.

This ring locks the die in place. The matrix is released by pressure on the hydraulic system, which pushes the springs to release the elastic ring.

For more information, watch the following video: Rapid Block System

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The system consists of a hand pump and a piston, which are needed to dismantle the die.

The piston is installed between the rotor and the reinforcement flange so as to push the die out of its seat.


automatic lubrication system.jpg automatic lubrication system2.jpg

This system includes a high viscosity grease pump.

It is equipped with blades to break up possible air bubbles. The system is connected to the press via a rotary distributor connected directly to the main shaft.

Lubrication is controlled by an electrical panel that is included in the delivery. The panel allows you to measure the required amount of grease using two timers to regulate the time for applying grease and pause.


The pump has the following characteristics:

● the flow is adjustable from 2.9 to 17 cc / min.

● motor 0.185 kW, 400V, 50Hz

● steel tank for 10 kg

● filter

● pressure relief valve

● pressure gauge

● indicator of minimum lubricant level

● progressive dispenser for distributing grease at two points

● inductive PNP sensor for cycle monitoring

● control valves for 1/8 outlet