Crankcase Ventilation for Infirmary CHP Engine: CAT G3520H

The Equipment

Caterpillar G3520H


The Challenge

A power systems dealer in the UK partnered with an infirmary to supply three gas engines for a CHP project. The existing crankcase breather systems were allowing bypass to contaminate the engine intake air filters and subsequently the internal engine components, the turbo charger and inter coolers. The construction manager stated, “This became quite serious when we found crystallized oil on the turbo blades which led to a costly overhaul.”

The Solution

Solberg UK visited the site to complete a survey. Solberg’s recommendations for a successful installation included the ACVB Series, high efficiency, advanced crankcase ventilation system. This unit was developed for the G3500H series. Solberg delivered three ACVB systems which included a pre-separator, thermal insulation jackets and waste oil consoles.


Feedback from the construction manager: “Your attendance at site during the installation was extremely helpful and assured the equipment was both suitable and working correctly. In service, the equipment has run perfectly and we have had no issues. The filter swaps are very simple and the gauge gives a clear indication of functionality and filter status. This is a good product that functions well and has ease of maintenance. In the future I will be recommending that we install your product as part of our package.”

The Product

The ACVB 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 and 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.

Solberg Products Provided


  • ACVB-80136-PS-J Advanced Crankcase Ventilation System
  • Optional Pre-Separator (ACVB-PS)
  • Optional Insulation Jackets (ACVB-J-BKT & ACVB-J-PS)


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Looking for other references or past examples of our service? Contact a Solberg representative today. We’re always happy to discuss our experience and your project requirements.

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