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

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Compact Vacuum Filters

Minimize pressure drop and maximize footprint savings


Product Spotlights, Demonstrations

DSV Series

Two Stage Discharge Filter

ACV Series

Advanced Crankcase Ventilation

VTL Series, VTS Series

Vacuum Trap

WL Series

Medium to High Vacuum Filtration

Vapor Condensing Systems

Protect your vacuum pump from harmful vapors and liquids

Crankcase Ventilation Retrofit

The Challenge

A California based anaerobic digester developer needed a cost effective closed crankcase ventilation system that was tailored to fit CAT 3516 engines. The engines are used for Biogas energy applications for dairy farms and other commercial facilities. Their previous set up required two units per engine and expensive custom adapter plates for attaching their existing units. Finding an off the shelf solution with a proven track record and working with a hands-on partner to provide a more cost-effective solution were the key decision drivers for the developer.


The Solution

Solberg offered its ACV Series Advanced Crankcase Ventilation System as an economical solution with a one-piece bracket that bolts directly to the CAT 3516 engine. The standard Solberg ACV system and bracket were supplied requiring no additional adapter plates, simplifying the install. A customer specific kit was created allowing the developer to easily reorder components for future projects.



With the ACV retrofit, the developer was able to reduce their overall cost on the crankcase ventilation system while eliminating additional components. The developer was satisfied with the results and has partnered with Solberg for future Bioenergy projects. Based on the success with the ACV project, the developer asked Solberg to assist with cleaning up the raw biogas. Solberg provided multiple stainless-steel liquid knockout filters / gas scrubbers to clean the biogas prior to entering the engine.


Solberg Products Provided



Advanced Crankcase Ventilation system


ACV Accessory Components consisting of customer specific bracket and 90 degree elbows


LRSD-DM14/275-400FS1 Low Pressure Stainless Steel liquid knockouts vessels / particulate scrubbers


The Product

The ACV is designed to protect your engine’s turbo, coolers, and inlet air filters as well as help ensure environmental compliance while keeping engine rooms clean, safe & free of oil mist. The series comes standard with industry leading automated vacuum control technology to regulate crankcase pressure and prevent seal leakage. The replaceable filter element contains a proprietary media pack offering exceptional efficiency levels with an extremely long life, allowing operators up to one year before an element change is required.


ACV Design Features

- Eliminates visible emissions (99%+ efficient at 0.3 um)

- High performance coalescing elements offer long life

- Flow ranges from 2 - 40 CFM (3 - 68 m3/hr) for single units

- Integrated vacuum control valve controls precise range of vacuum

- Diaphragm vacuum regulation valve design, no springs; No manual vacuum adjustment required

- Drain port for oil recovery

- Universal mounting bracket

- Available with installation kits

- Optional atmospheric bypass


For more information click here 

Caterpillar 3516 Biogas Engine Applications-ACV Series

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