Vertical placement of Gimat rotary valve with centrifugal sieves
Customer: food industry company
Customers requirement: Big Bag discharging, final granulometry check and removal of any foreign bodies, pneumatic transport without demixing of product feeding the customer's existing automatic bagging machine (for 25 kg bags with an output of 3000 kg/h).
The customer's main needs included:
- Big Bag emptying by limiting dust dispersion.
- Dosed flow of product to ensure correct dosing inside the centrifugal sieve and the pneumatic transfer system located downstream.
- Pneumatic transport of powders by minimising demixing and ensuring a constant flow to the bagging machine.
Implemented solutions
To effectively respond to these needs, GIMAT designed and built an integrated system that included several key machines of its own production:
- Big Bag unloading station: adjustable in height and equipped with a vibrating hopper with dust seal on the bottom of the Big Bag. This allows continuous and complete emptying of the Big Bag contents, guaranteeing operator safety by protecting them from the risk of dust dispersion.
- Our patented rotary valve: its compact design allows for easy insertion between the Big Bag emptying station and the underlying sieve. By limiting the overall height as much as possible, the GIMAT rotary valve allowed the customer to continue using their forklifts to handle the Big Bags, which otherwise would have had to be replaced with unnecessary additional costs. The perfect seal of the rotary valve allowed for a constant and measured flow by gravity towards the sieve. The sieving was optimal, as was the air/product mix in the pneumatic transfer airstream.
- Rotary separator: the end-of-line control sieving system to intercept any foreign bodies or lumps of dust was chosen by the customer based on their experience.
- GIMAT dense phase pneumatic transfer: the transfer of the sifted powders to the bagging machine was carried out through a 3000 kg/h dense phase pneumatic transport, with a “claw” vacuum pump. The dense phase allowing higher concentrations of powder and a lower transport speed inside the pipeline, significantly reduces the demixing typical of pneumatic transport in the dilute phase.
