Measurement technology & test benches Complete standards compliance for maximum system stability
Real-world test facility simulations, automated data collection, and certified validation for challenging mobile and industrial hydraulics systems. Find out how our advanced measurement technology ensures maximum legal certainty and reliable component design via precise Δp-Q characteristic curve determination, state-of-the-art multipass processes, and rigorous quality control.
In the challenging field of mobile hydraulics and in complex machinery and plant engineering, system efficiency and reliability depend heavily on the precise validation of every component. For development engineers, designers, and quality management officers (QMB), imprecise filter media designs pose a significant risk: Unexpected downtimes at the end customer's site and significant liability risks necessitate comprehensive documentation and strict adherence to standards.
To substantiate the technological quality promise of our suction filters, return line filters and inline filters, RT Filtertechnik GmbH has invested in a highly advanced measurement technology infrastructure. Our in-house test facility is a reliable partner during your final evaluation phase, providing the rigorous physical performance data you need to shortlist challenging development projects.
Complex validation problems solved: standards compliance through high-end measurement technology
When a company lacks the capacity to realistically simulate highly viscous cold starts or high-frequency pressure pulsations, RT Filtertechnik provides tailored support. We solve your key challenges right here in the lab:
- Minimise pressure losses: Using precise measurement technology, we can help you determine the Δp-Q characteristic curve and pressure loss of filter media according to ISO 3968, allowing you to effectively and proactively optimise the flow resistance in your systems.
- Ensure separation rates: Ensure accurate filter performance data by conducting multipass tests according to ISO 16889 and guarantee the precise cleanliness class of your fluids under controlled conditions.
- Define mechanical limits: Use our systems as a test bench to determine collapse and burst pressure behaviour in accordance with ISO 2941 to completely rule out structural component failure under extreme conditions.
Through mathematical and statistical analysis of test results, as well as dedicated root cause analysis of individual component failures, we proactively support you in optimising your filtration systems.
A technical breakdown of our test benchesVerified maximum load capacity
The test facility at RT Filtertechnik accurately replicates real-world operating conditions. Highly specialised test benches ensure that your components can withstand extreme mechanical and thermal stress:
Dynamic multi-pass test bench
For cutting-edge media development, we don't just conduct standardised tests. We also conduct advanced multipass tests with pulsating flow rates, following the withdrawn ISO 23369 standard, as well as freely programmable, realistic pulse cycles.
- System design: 2-circuit system (circuit 1 with Qmax = 160 l/min, circuit 2 with Qmax = 800 l/min) at a Pmax of 25 bar.
- Fluid & viscosity: Aeroshell 41 is applied within a controlled viscosity range of 14 cSt at 40 °C.
- Particle analysis: Continuous online measurement of particle count before and after the filter element is performed using the PAMAS particle measurement system via 8 automated data channels.
High flow rate test bench up to 1500 l/min
This facility is specifically designed to simulate extreme flow rates and to precisely analyse large-volume components.
- Key data: Qmax = 1500 l/min, Pmax = 15 bar, tank volume 1000 litres.
- Cold start verification: High-viscosity oil (ESSO NUTO 460) is used within a viscosity range of 3000 cSt to 40 cSt to accurately simulate critical cold start phases.
- Dynamic testing: Thanks to an integrated, pneumatically controlled pulsation system (max. 0.5 Hz at 500 l/min), the flow fatigue characteristics of hydraulic filter elements can be tested in accordance with ISO 3724. Additional attachments also enable measurements to be taken on a third test circuit at flow rates of up to 1,000 litres per minute.
Multifunctional high pressure multipass test bench
While standardised test benches typically only allow element development up to a differential pressure of 15 bar, this system reaches critical high-pressure ranges.
- Performance data: 1-circuit system with Qmax = 160 l/min at a maximum system pressure of Pmax = 130 bar.
- Main application: Parallel determination of filter performance data according to ISO 16889 and flow fatigue resistance testing according to ISO 3724 under extreme differential pressures of up to 130 bar. This system is the ideal choice if you need a highly durable test bench to determine collapse and burst pressure behavior in accordance with ISO 2941.
Bubble point test benches according to ISO 2942 for both development and production purposes
Comprehensive quality control of manufacturing processes is conducted through random sampling and continuous monitoring, utilising systems that are both spatially and functionally independent:
- Development test bench: This ensures precise quality control in accordance with ISO 2942 before proceeding with additional standardised load tests, such as ISO 16889 or ISO 3724.
- Series test bench: Conceptually optimised for pre-production testing. Made from stainless steel, this modular system is fully explosion-proof and TÜV-certified, meeting all German UVV accident prevention regulations.
Water absorption fluid analysis according to DIN EN ISO 12937
Dissolved and free water in a hydraulic system accelerates oil degradation and damages sensitive components. RT Filtertechnik combines standardised analytics with practical simulations:
- Laboratory analysis: Precise determination of fluid water content using coulometric testing equipment based on the Karl Fischer method for water content determination in liquids, as outlined in ISO 12937.
- Stress simulation: A specialised, internally developed test bench determines the actual water absorption capacity of elements. At a Qmax of 7.5 l/min and a Pmax of 20 bar, a water ingress of 33.33 ml is simulated every 20 minutes in a hermetically sealed pressure vessel in a temperature range of 20 °C to 120 °C. All subsequent sample analyses are conducted in strict accordance with the standards outlined in DIN EN ISO 12937.
Custom bubble separator test bench
The precise design of bubble separators is based solely on individual customer parameters and expected system air content, without relying on rigid testing instructions.
- Technical data: Design for Qmax = 400 l/min, utilising Coriolis flow meters for manual or automated control of air supply.
- Viscosity stability: Integrated cooling and heating systems ensure that the medium-viscosity oil (ISO VG46) consistently operates at a viscosity of 30 mm²/s or 32 mm²/s, enabling the generation of reproducible characteristic curves for your datasheet collections.
Precision measurement technology for B2B quality without compromises
The consistent use of highly advanced measurement technology ensures the long-term success of your components in the field. When testing the flow fatigue properties of hydraulic filter elements according to ISO 3724, we simulate the harsh mechanical alternating pressures that occur during actual operation.
Test facility expertise: When combined with the determination of structural material data – such as the creation of stress-strain curves for individual components, assemblies, or welded joints – our test benches transform raw measured values into legally compliant quality evidence.
By combining precise testing facilities that comply with DIN EN ISO 12937, advanced mathematical methods for experiment analysis, and cutting-edge software for data acquisition, we ensure that your development projects meet the highest quality and reliability standards.
