Dip tank pretreatment

Pretreatment system for large items or products, and also for productions with small quantities or limited space.

If the geometry of the product, e.g. in the automotive industry, is complex and a spray system cannot reach all corners of the surface, this kind of pretreatment is the best choice.

The dip tank pretreatment design as such is customized according to the product, dictating the numbers and length of the steps needed. Also temperatures and materials are taken into careful consideration.

Dip tank construction

The tanks are normally made of 2 mm stainless steel. A very strong steel construction with a cradle like function supports the sides of the tanks.


The heated tanks are insulated with 75 mm mineral wool and covered with powder coated cassettes on the outside; alternatively unpainted or galvanized.

For easy cleaning and emptying the tanks, place a ball valve at the lowest point.

Process steps, pumps and circulation

Pumps and injectors in the tank circulate the liquid in every process step. This gives high circulation with low kW consumption.

Reverse cascade system saves water

The rinse water is lead through the line in a reverse cascade rinse to minimize consumption of rinse water. We always design our systems with a minimum of two rinse steps, often even three.

The design includes pre and after rinse systems, electronically controlled and ensuring minimal consumption of water, energy and chemicals.


Heating by oil, gas, water, steam or electricity, all on request. Often the type of heating is decided according to availability, market price and chemicals in use.