Tunnel Pretreatment

In spray pretreatments or tunnel pretreatments the product passes through a tunnel with a number of process stages preparing the product for the application process. These process stages are designed to the specific type of product. 

The tunnel pretreatment design is customized on the basis of the product. We design the numbers and length of the process stages. Also temperatures and materials are taken into careful consideration. ideal-line pretreatment systems are insulated to prevent condensation and to decrease heat loss.  

Contact us for more info on this type of system or just see who your contact person is in your country.


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Process stages

Every process stage consists of a tank with one or more strong vertical pumps distributing the liquid to a number of rinse ramps fitted with nozzles.


The pumps are all high efficient and made of acid proof steel. All motors are 100% IEC standard with no modification and very easy to exchange, if needed. 

 All pumps are tested and certified according to the ideal-line quality control. They are mounted vertically in the tanks and immersed in the liquid.


The rinse ramps are of stainless steel and the quick clip-on nozzles are made of plastic. This is a very rigid construction. Also memory nozzles are a possibility and make the cleaning and the service very easy. Both types are easy exchangeable.  

Intermediate zones

The product is dripping of in the intermediate zones between every process stage. The length of the zones depends on the dimensions of the product, and the speed of the conveyor help minimizing the mixing of the tanks. 

We provide stairs, door and light for all intermediate zones, and also a nonslip gangway above all the tanks. It makes the system service friendly, safe and gives easy access to the system. 

Exhaust saves energy and protects the conveyor
Unique developed sealing by ventilation to protect the conveyor from the steam. This is a better solution than brushes which will wear out and be a source of contamination.

Reverse cascade system saves water

The rinse water is lead through the line in a reverse cascade rinse to minimize the consumption of rinse water. We never design a system with less than two rinse stages, often even three.

The design includes pre- and after rinse systems which are electronically controlled and ensure minimal consumption of water, energy and chemicals.


Oil, gas, water, steam and electricity heating on customer request. Often it is decided on the basis of the availability, market price and chemicals.


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