Solberg Manufacturing | Filters, Silencers, Vacuum Filters, Oil Mist Eliminators, Separators

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Product Spotlights, Demonstrations

WL Series

Medium to High Vacuum Filtration

Compact Vacuum Filters

Minimize pressure drop and maximize footprint savings

SME Series

Oil Mist Eliminators

DSV Series

Two Stage Discharge Filter

ACV Series

Advanced Crankcase Ventilation

VTL Series, VTS Series

Vacuum Trap

Landfill Gas Recovery - Caterpillar G3520

Converting Waste to Energy. Eliminating Crankcase Emissions.

The Challenge

The Operator of a closed landfill in Manchester, Connecticut wanted to recycle the methane gas he was paying thousands of dollars to flare off each year. His idea was to produce power on site and sell it to the grid during peak times. This can be a lucrative enterprise given the growing demand for electricity and U.S. Government Energy Tax Credits.

To accomplish this, he spent roughly $4,000,000.00 to build a facility and install two Caterpillar G3520 gen-sets. After installation and start-up, the Operator experienced significant visible crankcase emissions, and these were exhausted outside the building to the atmosphere. This environmental issue was troublesome since he was trying to protect the environment by installing the waste to energy gen-sets.

The Operator hired an engineering firm to design the plant, and after the emissions were deemed excessive, he asked them to find a solution. Not only did he want to eliminate the emissions, but he also wanted to maintain a constant pressure in the crankcase all while being maintenance free. Solberg was up to the challenge.

The Equipment

Engine Gen-Set: Caterpillar G3520
Crankcase Blow-By: 35 CFM
Required Crankcase Vacuum: -.5” to –1” H20

The Solution

Solberg designed a Vacuum Assisted Oil Mist Eliminator (VAE) to capture the blow-by emissions and regulate crankcase pressure. Additionally, a Variable Speed Drive was included to automatically control crankcase pressure in the absence of maintenance personnel. This was a collaborative process in which Solberg Engineers worked directly with the engineering firm and Operator to design the ideal system.



After the two VAE assemblies were delivered, installation was handled by the Operator. During the process, Solberg advised and provided information regarding mounting and start-up.


System Components

Internal Air/Oil Separator Element: 99.97% efficient for 0.3 micron oil mist. Designed to eliminate visible blow-by emissions

Regenerative Blower: Creates vacuum to overcome differential pressure created by the separator element and to maintain negative pressure in the crankcase

Variable Speed Drive Control Box: Automatically maintains a constant vacuum level in the crankcase as differential pressure and blow-by parameters change

Vacuum Relief Valve: Opens to allow air into the blower if vacuum exceeds a set value

Pressure Relief Valve: Opens at 1” of H20 positive pressure in the crankcase. Protects engine seals and prevents leakage



During two subsequent visits by Solberg Engineers, the mist eliminators functioned well. Crankcase vacuum was properly maintained by the variable speed drive. Additionally, the previously visible blow-by emissions were eliminated.

Solberg staff will stay in contact with the Operator to ensure the VAE installation continues to satisfy his needs.

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