How to Fight Hidden Air in Hydraulic Tanks
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Your reservoir is more than just a holding space for hydraulic fluid.
“If the reservoir isn’t leaking, all is well, right?”
Actually, the hydraulic tank assembly plays a critical role in removing damaging air contamination from your fluid!
Despite being the central pillar of controlling air contamination, many reservoirs aren’t well-optimized for the job. Even reservoirs that perform adequate deaeration might be secretly weighing down the system and the oil budget.
How can air contamination affect my hydraulic system?
Discussions around contamination usually focus on solid particulates and water. But what happens to a hydraulic system when it becomes contaminated by air?
If not controlled, air contamination targets system components, overall oil condition, and machine efficiency:

Cavitation Damage
How does a hydraulic reservoir influence deaeration?
Unfortunately, it’s impossible to completely eliminate air in a hydraulic system, so best way to handle air in your oil is to influence how the air behaves.
Enabling deaeration involves encouraging any bubbles to coalesce and escape the oil. In a hydraulic system, the hydraulic reservoir is where this deaeration happens.
Ideally, any air bubbles that form in the hydraulic fluid will exit the fluid and disperse into the open headspace of the reservoir.
The key to air removal in the reservoir is reducing fluid turbulence in the reservoir.
Fast, turbulent flow in the reservoir keeps air bubbles circulating and suspended in the fluid for longer. In extreme cases, flow may be high enough that it causes surface disruptions that draw more air into the fluid.
A tank assembly that can reduce the turbulence of flow allows air bubbles to coalesce, rise, and escape from the oil more easily. This can be accomplished with thoughtful tank geometry and carefully selected in-tank filtration.
Eliminating turbulence is also critical for keeping air out of suction lines. The longer air bubbles remain in the reservoir before being drawn into the suction lines, the better their chance of coalescing and escaping the oil. Reducing turbulence is a good way to boost air residence time.

One of the ways that conventional reservoir designs have tried to increase air residence time and combat flow turbulence is by simply making the reservoir bigger.
Increased volume can dampen turbulent flow and increase air residence time…but oversized reservoirs come with some major downsides:

How can Tank Optimization and Air Fusion Technology filtration improve my reservoir?
Schroeder Industries’ Tank Optimization uses specialized digital simulations to analyze the existing properties of a tank, identifying inefficiencies in the design. From there, our tank assembly and hydraulic system experts develop a solution that optimizes deaeration and improves overall tank performance.
When paired with purpose-built deaerating filtration, this optimization and redesign process often enables significant reservoir downsizing.

See how these real Schroeder Industries clients achieved significant tank assembly downsizing by combining deaerating filters with Tank Optimization:
Ask the experts if your reservoir could use Tank Optimization!
Find out what’s happening inside your tank:
Request for Quote
Compact Diesel Filtration Powerhouse: HDP120
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Introducing high-performance diesel filtration for engines up to 31 gph.
Meet the smallest—but certainly not the least—addition to Schroeder’s high-performance onboard diesel fuel filtration lineup.
The HDP120 brings Schroeder’s signature filtration performance to compact, off-highway diesel systems.

Part of a comprehensive line of onboard diesel fuel filtration solutions.
Schroeder Industries has an HDP diesel filter for virtually every engine.
Our exceptional onboard diesel filtration meets stringent modern cleanliness standards and keeps operations moving forward across the globe. Discover solutions serving everything from compact mobile equipment to massive ship engines and power generators:

Why is effective diesel filtration so important?
Modern Tier IV diesel engines have exceptionally low tolerance for solid contamination.
The components in a high pressure common rail (HPCR) engines experience incredibly high pressure. Because of this, the cleanliness standard for injected fuel is significantly stricter than hydraulic cleanliness standards.
For injectors and other fuel system components to meet their standard operating lifespan, fuel must meet an ISO Target of <12/9/6 as it enters the injector.
This target represents 16x greater sensitivity than a typical modern hydraulic system!
Replacing a single fuel injector can cost thousands of dollars. Multiply that by a 6 or 8 cylinder engine, and the cost of contamination skyrockets.

Onboard diesel fuel filters are the last line of defense.
Diesel fuel must be filtered at all stages, from the storage and filling phase to final injection. Onboard diesel filtration is the final line of defense for the hyper-sensitive, expensive components that comprise a modern diesel engine.
When selecting a diesel fuel filter, choose wisely!
Talk to the contamination control experts:
Our team of fuel filtration experts can help you determine the right diesel filter for your application.





