Cleaner Engines Start with Controlling Blow-By
The hidden threat inside every engine
Engine blow-by is an unavoidable byproduct of combustion—where gases and particulate matter slip past the piston rings into the engine sump.
As components heat up and cycle at high speeds, these gases mix with fine oil mist, creating a harmful vapor cloud rich in unburned fuel, particulate matter, and emissions. Left unfiltered, blow-by doesn’t just damage engines—it threatens everything from fuel efficiency to regulatory compliance.
The Cost of Poor Crankcase Ventilation?
What you don't capture can cost you
1. Lost Performance
Turbochargers and intercoolers become contaminated, reducing boost pressure, increasing fuel consumption, and degrading combustion efficiency.
2. Compliance Risk
Unmanaged emissions can push engines beyond the limits of Euro VI, EPA, and CARB standards—jeopardizing certifications and reputations.
3. Increased Maintenance Costs
Oil loss shorten service intervals, increasing downtime.
Parker’s CCV systems are engineered to capture and neutralize these risks—protecting your engines, extending their lifespan, and ensuring you’re always a step ahead of emissions regulations.
Choosing the Right Crankcase Ventilation Solution
Closed Crankcase Ventilation (CCV) vs. Open Crankcase Ventilation (OCV)
In an Open Crankcase Ventilation (OCV) system, blow-by gases are vented directly from the crankcase to the atmosphere. While ensuring Turbo and Intercooler cleanliness, this comes at the expense of overall emissions from the engine. Parker's OCV filters and Super impactors can be operated in an OCV system to remove oil mist emissions, but gaseous content such as NOx and unburnt Hydrocarbons will be measured as part of the engines overall emissions.
A Closed Crankcase Ventilation (CCV) system takes a smarter approach. It routes those same gases back into the engine’s air intake, where they are re-burned during combustion. This closed-loop process significantly reduces emissions.
For OEMs designing for tomorrow’s standards, closed crankcase ventilation isn’t just a better option—it’s the smarter one.
Why Choose Parker?
Invented by Parker. Perfected for your Platform.
Parker revolutionized the diesel industry in the 1990s with the launch of the first fully integrated crankcase ventilation (CCV) system. Since then, we’ve been setting the standard—continually pushing the boundaries of performance, efficiency, and application-specific design.
Our advanced filtration technologies, including proprietary media, gated impactors, and hybrid systems, consistently deliver industry-leading efficiencies—exceeding 99% separation performance. And we don’t just test in theory—we test in reality.
With a state-of-the-art engine dynamometer lab, we simulate real-world engine conditions to precisely calibrate our systems for your applications. Whether it’s heavy-duty on-road, off-road, or industrial equipment, Racor CCV systems are engineered to perform under extreme conditions—and protect where it matters most.
Comprehensive Crankcase Ventilation Solutions
Explore Parker's crankcase ventilation portfolio to future proof your next engine platform.
Media Solutions
Proven Simplicity. Trusted Performance.
For over three decades, Parker's original heavy-duty crankcase ventilation solution has delivered reliable protection in critical environments—from superyachts to data centres, hospitals, and banks. With filtration efficiencies exceeding 95%, this cost-effective solution is built on a foundation of simplicity, robustness, and versatility.
Easily retrofitted across a wide range of applications, this time-tested design has evolved with coalescing technologies, now featuring ultra-high-efficiency media for even greater performance. As Parker's first-to-market CCV innovation, it continues to lead the way with dependable, upgraded filtration—proving that great design stands the test of time.
Mechanical Super Impactor Solutions
Maximum Efficiency. Zero Compromise.
Now in its sixth generation, Parker’s Super Impactor is our flagship CCV solution—engineered to meet the highest demands of modern engines. Delivering over 99% efficiency across its full service life, this compact, lightweight system combines performance with practicality.
Designed as a true “Fit-for-Life” solution, the Super Impactor features modular construction, flexible mounting, and continuous draining for a seamless drop-in experience across multiple platforms. It’s a “fit-and-forget” solution that reduces maintenance, improves fuel economy, and supports your sustainability goals—delivering long-term protection with zero hassle.
Integrated Rocker Cover Solutions
Smart Packaging. Seamless Integration.
For over thirty years, Parker has partnered with OEMs to engineer crankcase ventilation systems directly into rocker covers—leveraging both our trusted media and advanced Super Impactor technologies.
This integrated approach delivers all the benefits of high-efficiency CCV performance—without adding bulk. By housing the system within the rocker cover, you free up valuable engine bay space, simplify assembly, and streamline the overall design. Compact, powerful, and built for precision integration, our rocker cover solutions are ideal for applications where space is at a premium and performance is non-negotiable. If you’re designing for tight tolerances and high expectations, this is your solution.
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