Our Products #5216729

The reservoir of a hydraulic system can be a significant source of contamination. At the same time, the reservoir is an ideal location for correcting adverse fluid conditions. The application of proper HYDAC reservoir accessories will allow for the monitoring and control of oil cleanliness, temperature, and level.


Breathers are commonly overlooked, or regarded as a commodity, and selected based solely upon price. This mistake can cause system inefficiency and component failure, resulting in lost production and costly repairs, especially when harsh environmental conditions exist. Using high quality HYDAC breathers and filler breathers will effectively combat the ingression of airborne contamination and moisture, therefore increasing the efficiency and reliability of the system.


The addition of new oil to a reservoir is yet another opportunity for contaminant to enter the system. Sometimes large contaminant, which will undoubtabley cause catastrophic damage to the pump. HYDAC filler breathers will ensure that large contaminant do not enter the tank during filling, and suction strainers will keep any large contaminant that do exist in the reservoir from entering the supply line. New oil also contains more fine particle contaminant than recommended for most systems. Thats right. most new oil is "dirty." Removal of these fine particles is easily accomplished by using HYDAC portable filter carts, or hand held filtration units.


Fluid level must also be monitored to avoid starving the pump.


HYDAC offers fluid level indicators (sometimes called sight gauges) which allow for the oil level to be viewed outside of the tank. These indicators are also available with electric switches which can be used to trigger alarms. Thermometers and thermal probes are additional options in HYDACs line of fluid level indicators.

The advantages of an off line cooling system are a stable cooling and filtration performance irrespective of variations in flow and dutycycle of the main hydraulic circuit. This allows the cooler to be sized to fit the heat load and not the maximum return flow of the main circuit.


Additionally, cooling systems are quoted and manufactured on a custom orders. Please contact HYDAC for further information.


Off-line cooler is completely isolated from surge pressures in the return line that can potentially damage the cooler. And lastly, Maintenance can be performed on the filters without having to shut down the main system.

The HYDAC family of dependable high pressure ball valves provides full, unrestricted flow and positive shut-off of fluids and gases under extreme service conditions. Models are available to accommodate system pressures up to 7, 250 PSI. Since a variety of materials are available, HYDAC valves can be used with various fluids and gases including petroleum based oils and some water glycols.

Ten years ago a diesel engine did not require anything close to the level of filtration provided by HYDAC. With poor quality filters the engine would still run, maybe not efficiently, but it would run. But with today's, engines both the particulate and the coalescing filters must be of only the highest quality. Be assured the results of poor filtration are no longer just black smoke and a lack of horsepower. No, with Tier 4 engines' poor filtration will likely mean lost revenue due to downtime as the operator pays to replace a failed injector. These problems are both manageable and should not add cost. With good filtration installed at the fill point, the engine will run more efficiently and continuously, but the filters used and the higher level of filtration required can no longer be an afterthought. It must become the focal point of any feel and or any operator. Filtration quality and the profitable operation of any Tier 4 engine will become one in the same.

The Tier 4 engine is a technology shift and when compared to Tier 1-3 engines, Tier 4 engines require a completely superior level of filtration to run, much less to run reliably and efficiently. Tier 4 diesel engines will now react more violently if the injectors are constantly bombarded by contamination. To put this into perspective newly delivered bulk diesel fuel typically has an ISO cleanliness level of ISO 222018 to ISO 211917 but today's injectors need to see fluid with a cleanliness level of below ISO 1186 (aerospace cleanliness).

HYDAC has been a name synonymous with advanced technology, design, manufacturing and application engineering for more than 50 years. HYDAC is the only manufacturer of all three types of accumulators - Bladder, Piston & Diaphragm.

Based on research and development in our laboratories for testing of physical, chemical and mechanical properties, HYDAC achieves the highest quality of accumulators and related parts.

Finite Element Analysis is implemented in the Computer Aided Design package supporting development and engineering to optimize the performance and safety of the components.

Application assistance is available utilizing HYDAC computer software to simulate your system and optimize the sizing for energy savings, shock absorption or pulsation dampening.

As applications become more sophisticated and widespread, the need for highly sensitive diagnostic equipment to measure and analyze the performance of hydraulic filter systems is increasing.


HYDAC provides:
Diagnostic Products - known for their diversity, capability and precision.
Fluid Conditioning Products - hydraulic oil filter systems for removing contaminants and water from various types of hydraulic fluids.
Todays hydraulic filter systems have seen a shift from reactionary to preventative maintenance. At the forefront of this switch is total system contamination management. In the past fluid power systems were equipped with hydraulic filter system filtration, which cleaned the system during commissioning and then had the task of maintaining system fluid cleanliness at a constant level. This approach frequently no longer suffices due to the growing demands made of todays hydraulic systems (extended maintenance intervals and mounting cost pressure). By introducing contamination management to minimize particulate concentration in all areas, beginning with manufacturing and extending to the operation of the entire system, system malfunction and failure caused by particulate contamination can be prevented. As a result, costs savings are achieved.

As important as the performance of the valve itself is the proper installation of the cartridge into a correctly made manifold or body. HYDAC's full range of cartridge valves can be used in custom manifold applications, or for in-line installation via our selection of cartridge line bodies. Whether using form tools to make a custom manifold, or quickly plumbing a valve and line body assembly, the HYDAC cartridge cavity system enables versatile and reliable valve applications. Performance and dimensional information for a specific valve can be found on individual cartridge data sheets.

HYDAC utilizes the latest technology available for 3D modeling and functional analysis todeliver the optimal design for each application. We offer customized reports and design validation throught finite Element Analysis (FEA).

Each unit must pass a series of stringent inspections and functional tests to ensure we deliver the highest quality product. All cylinders are tested at 150% of the maximum allowable working pressure utilized high intensity ultraviolet technology.

HYDAC stands for hydraulics, systems and fluid engineering.


Over 30 years ago, inspired by its industry and application experience, HYDAC expanded its portfolio to include sensors, measuring instruments and electronic controls. Almost all these products are developed, manufactured and marketed by HYDAC.


Within the framework of continuous technical change towards mechatronic systems, particularly on mobile machines, HYDAC has expanded its product range accordingly. In the area of control technology and visualization, it established a joint venture with the company TTTech Computertechnik AG. The collaboration is the perfect fusion of expertise in the both companies in different industries and applications with the aim of providing application-specific system solutions of maximum benefit to the customer.