Goudsmit double-walled magnetic filters can remove iron particles as small as 30 µm from liquid chocolate. The filter housing is heated with warm water to keep the chocolate in a liquefied state. The design of the electromagnetic filter was recently modified at customer request to include a screen for filtering out product impurities such as paper, plastic particles, and stones. These double-walled magnetic filters are designed for viscous liquids that tend to solidify on cold surfaces. Suitable only for products with a low risk of bacterial proliferation (such as melted chocolate). Warm liquid flowing through the double outer walls of the housing prevents product solidification.

Goudsmit filters provideadditional screening

The screen is typically a separate unit installed upstream of the electromagnetic filter during production. In the improved design, it is combined with the double-walled magnetic filter, reducing operation, cost, time, and heat loss. Additional benefit: both the magnetic rods and the screen can be cleaned in a single operation.

Goudsmit filters are used forpressure piping

Major chocolate producers in France, Germany, the Netherlands, and Belgium use double-layer electromagnetic filters in their production lines. These remove metal particles from products that may condense and are transported under pressure. Hot water flows through the outer wall to keep the product in a liquefied state. The maximum operating/product temperature is 140°C. Powerful neodymium-iron-boron magnetic rods in the magnetic core capture a magnetic flux of 10700 Gauss, thereby capturing iron particles in the product and ensuring no contaminants enter the final product.

Goudsmit filter material:316 stainless steel

The electromagnetic filter is made of 316 grade stainless steel, thus complying with the strict requirements applicable to the food industry (HACCP). The filter is easy to install in existing pressure pipelines (10 to 15 bar). Seals comply with EC 1935/2004. The electromagnetic filter sizes range from DN50 to DN125.

Goudsmit filterCleaning function

At customer request, the existing double-walled electromagnetic filter was modified to increase the wall thickness. This creates an air-filled space between the core through which chocolate or masses flow and the cavity through which hot water flows. This prevents the risk of water entering the chocolate, which would lead to the loss of the entire batch.

Goudsmit filterSpecial closing function

Customer-specific implementations also include additional safety: a special closing device on the cover, so the cover cannot be opened without tools under pressure, and cleaning of the product chute does not occur. In addition, the designers added a special connection point allowing users to install a pressure sensor for routine pressure measurements.

GoudsmitHow does electromagnetic filtration work?

A magnetic device with very strong neodymium magnetic rods is located in the middle of the product flow. Product containing ferrous impurities passes through multiple magnetic rods as it flows through the filter. The magnets attract passing ferromagnetic contaminants. After product flow stops, you remove the entire magnetic grid assembly from the product channel, then pull the magnetic rods out so that iron filings drop from the exhaust pipe, causing iron particles to fall off the exhaust pipe. Cleaning/disassembly sequence: Stop product flow. Loosen the bolted connections of the magnet unit. Remove the entire magnet unit from the housing. Remove the magnet unit from the extraction unit and place it together with the extraction unit, keeping it on a clean surface so that iron particles will fall off the tubes and be discarded. Wipe all parts with a soft cloth—using a suitable cleaning fluid if necessary—return the magnet unit to the extraction unit—reinstall the entire magnet assembly back into the housing. Retighten the screw connections. Resume product flow.