Photo by Maersk Shipping Lines Evaqvent Removal of harmful vapors from shipping containers
Pre-ventilation made easy
Fast efficient safeguarding of the work environment

Harmful chemical vapors in arriving containers.

An estimated 250 million shipping containers are unstuffed in the world every year, requiring approximate 260,000 man-years. Unstuffing or inspecting shipping containers may cause involuntary exposure to many types of harmful chemical vapors, emitted from the goods or added for fumigation purposes. Due to the limited natural ventilation in closed containers, accumulation in the air will occur during transport and may have reached harmful levels upon arrival.

Our solution — Pre-ventilation

Evaqvent AB has developed a method and tools to facilitate pre-ventilation of shipping containers before opening and unstuffing or inspecting their contents. Our specially developed Evaqplate (patent pending) is connected to a dedicated extraction turbine. With the turbine running, the Evaqplate is placed over one of the corner vents of the container, held in place by the vacuum created. The arrival concentrations of harmful levels of chemical vapors can normally be reduced by at least 80% within 1 hour. This substantial reduction in combination with the natural ventilation introduced when the doors are opened, reduces workers´ average exposure by 70-500 times of arrival concentrations. Initial peak exposure when doors are opened is also eliminated. N.B., in the video shown here, the turbine is placed outside for clarity purposes, however, it must be kept dry and is normally positioned inside the warehouse or in a weather protected cabinet outside.


 

Our solution — Pre-ventilation

Evaqvent AB has developed a method and tools to facilitate pre-ventilation of shipping containers before opening and unstuffing or inspecting their contents. Our specially developed Evaqplate (patent pending) is connected to a dedicated extraction turbine. With the turbine running, the Evaqplate is placed over one of the corner vents of the container, held in place by the vacuum created. The arrival concentrations of harmful levels of chemical vapors can normally be reduced by at least 80% within 1 hour. This substantial reduction in combination with the natural ventilation introduced when the doors are opened, reduces workers´ average exposure by 70-500 times of arrival concentrations. Initial peak exposure when doors are opened is also eliminated. Click on the video to the left to view a short demo. N.B., in the video the turbine is placed outside for clarity purposes, however, it must be kept dry and is normally positioned inside the warehouse or in a weather protected cabinet outside.


 

Our mobile ventilation package

All you need to get going. A high quality extraction turbine from Corroventa. Our Evaqplate suction plate with catch strap. Our gas sampler probe to facilitate vacuum and gas measurements. It is inserted between the rubber seals between the doors as shown in a picture below.  A differential vacuum meter to check the fit and achieved vacuum under the suction plate and for monitoring vacuum inside the container.  Suction and exhaust hoses are supplied in 15 m sections and cut and joined to the required lengths by the customer. A kit with hose connectors and clamps is provided. The turbine must be operated in a dry position.

 

The system can also be run by a petrol operated generator designed for electronic devices. All components fit in the back of a station wagon.

 

Our stationary solution

Although our mobile package can be used stationary, we have developed a system for fixed installations. It can be designed to customer specifications. The installation in the photo has two separate extraction fans and placed in an outside weather protected cabinet. A stationary solution may be an option when you can direct containers targeted for ventilation to a specific unloading dock or location.

 

Our research

We have investigated several hundred randomly selected containers arriving in Swedish ports and distribution centers. We identified close to 50 different chemicals. About 12% of all containers had levels in the air of harmful chemicals above the occupational exposure limits and 4% had carcinogens over the limits. The figures are likely higher in warmer climates.

 

Evaqvent AB, Sweden

Pre-ventilation of shipping containers made easy
info@evaqvent.com

Evaqvent AB, Sweden

Pre-ventilation of shipping containers made easy
info@evaqvent.com