Cooling screw conveyor for food industry

Cooling screw conveyor for food ndustry Ø600×7000 mm manufactured in accordance with EC-1935/2004.

Cooling system

1. Jacket cooling of the through
2. Cooling of the inne pipe of the screw conveyor

See another example of a cooling screw conveyor here Cooling of the inner pipe is not as efficient cooling of the screw flights by the hollow flight principle. But if the filling degree is high and the  speed of the screw rotor is above 10 RPM it can be an efficient solution. Cooling of the inner pipe is a more economic solution compared to cooling of the screw flights by using the hollow flight principle. Besides requirement for cooling the cooling screw conveyor is manufactured in accordance with EC-1935/2004 – the food directive

1. All material in the machine in stainless steel 1.4404/AISI-316L
2. All plate material in 2B – cold rolled plates
3. All surfaces in contact with food grinded to Ra<0,8 mym
4. All outside surfaces designed for easy drain off after cleaning

See another application in accordance with EC-1935/2004 Through and centertube are cooled with brine. The brine is connected to the inner tube via a rotary valve coupling. The rotary valve is working in both directions which means that you only need a connection from one side of the machine. BEMA has made the design in close cooperation with customer.

When you design a cooling screw conveyor you must follow these basic steps

1. Start to determine the effect in which you need to cool the material
2. Find the area needed to give you necessary cooling
3. Determine which type of cooling you want to use in the application:
   1. Jacket cooling
   2. Cooling of the inner tube of the screw auger
   3. Cooling of the screw flight by using the hollow flight principle

BEMA has experienced engineers and technician who can assist and help in design specification process.

FAQ – Cooling Screw Conveyor for Food Industry

1. What is a cooling screw conveyor used for in food processing

A cooling screw conveyor is designed to reduce the temperature of food products during transport. It ensures controlled cooling while maintaining hygienic handling, making it ideal for applications where temperature reduction is required before further processing or packaging.

2. How does the cooling system in this screw conveyor work

The conveyor uses jacket cooling around the trough and brine cooling through the inner pipe. A rotary valve coupling allows brine to circulate efficiently, providing stable and uniform cooling even at higher filling degrees and rotor speeds above 10 RPM.

3. Why is this cooling screw conveyor suitable for the food industry

The machine is manufactured according to EC‑1935/2004 food‑contact requirements. All materials are stainless steel 1.4404/AISI‑316L, surfaces in contact with food are polished to Ra < 0.8 μm, and external surfaces are designed for easy drainage after cleaning, ensuring full compliance and hygiene.

4. What should be considered when designing a cooling screw conveyor

Key design steps include determining the required cooling effect, calculating the necessary heat‑transfer area, and selecting the appropriate cooling method—jacket cooling, inner‑tube cooling, or hollow‑flight cooling. BEMA’s engineers assist with specification and optimisation throughout the design process.