Heatable modular test system for oil mist separators better as ISO 17536
Measurement and evaluation of fraction separation efficiency and burden
Isothermal and isobaric measurement
All components can be heated to 120°C
High reproducibility of the testing method
Internationally comparable measurement results thanks to the widespread use of the measurement system
Cleaning and calibration can be performed autonomously by the customer
Easy to operate, even untrained personnel can be instructed quickly in the use of the equipment
Modular layout offers increased flexibility
Validation of the clear function of individual components and the overall system during pre-delivery acceptance testing and upon delivery
Short set-up times, extremely low-maintenance
The unit will reduce your operating costs
Quality assurance and the development of filters/separators/traps should preferably be performed under test conditions that are relevant to the actual conditions encountered in practice. For this reason, oil separators must be tested at high temperatures of up to 120°C and, depending on the type of application, at high pressures.
With the modular test system HMT 1000, oil separators (e.g. for the separation of blow-by aerosols in internal combustion engines or for the separation of oil mist downstream of compressors) are quickly and accurately characterized and, in particular, successfully tested under practically relevant conditions through isothermal particle measurements up to 120°C:
Fraction separation efficiency
Burden / hold time
Total separation efficiency / gravimetric analysis
Thanks to the modular layout, the individual components of the test rig, such as the high-resolution heatable light scattering spectrometer Promo® 1000 H, the heatable dilution systems KHG 10 D and the heatable aerosol generator PLG 2100, can be simply removed from the HMT 1000 and used for other applications, e.g. measurements directly on the engine.
For many years, numerous companies all around the world have profited from the advantages of the heatable and pressure-resistant Palas® test components for isothermal and isobaric particle size and particle quantity measurements on oil mists.
Palas® HMT 1000 filter test rigs have been used internationally with great success in industry since 2001.
The heart of the HMT 1000 is the light scattering spectrometer Promo® 1000 H, which measures the particle size and the number of particles (and therefore the concentration) independently of each other but at the same time. With the aid of the Promo® 1000 H it is possible to perform very quick, clear, reproducible and isothermal measurements.
Fig 1: Promo® 1000 H
Advantages of optical particle measurements over purely gravimetric measurements:
Conventional quantitative gravimetric determinations are often not quick or sensitive enough and provide no information about the particle size distribution. Thanks to the excellent correlation between the quantitative distribution measurement and the gravimetric analysis, very fast and volume-relevant testing of the oil separators is assured. The determination of the clean gas concentration can be performed within 1 minute using the Promo®1000 H system.
Why use isothermal measurements?
The viscosity of the oil – and therefore the particle sizes and particle concentrations in the oil mist – varies as a function of the engine temperature. For this reason, oil separators must be tested at different temperatures, i.e. with different particle sizes (up to approx. 5-8 µm) and particle concentrations (approx. 105to 107particles/cm3) as well as different volume flows, in order to clearly characterize them in terms of their capacity to separate. Changes to the separation properties of the separator, e.g. due to the change in volume flow, temperature, filter burden etc. must be clearly determined through a reliableonline measurementorin-situ measurement. In order to avoid not only condensation effects, but also evaporative effects, on theHMT 1000the entire aerosol guide, including the preparation, sampling and measurement volume, can be heated to 120°C. As a result, measurements of theisothermal fraction separation efficiencycan be performed. Isothermal in-situ measurement, e.g. on the engine
The HMT 1000 test system is mobile and has a modular layout. As a result, the individual components can also be used for other tests and particle measurements, e.g. in-situ measurements on the engine.
Fig. 2: Isothermal particle sampling and in-situ measurement Automatic measurement data acquisition with the Palas® FTControl software
The software has been tried and tested in practice and enables almost fully-automated characterization of oil mist separators. This means that the results are independent of the person operating the test rig (see "Software" product group: FTControl). Test rig control:
Automated control of the volume flow
Automated activation process for the aerosol generator
Automatic switching between raw gas / clean gas measurement point
Automatic temperature regulation
Evaluation and recording of measurement signals, e.g. Dp, rel. humidity, temperature, volume flow, absolute pressure etc.
Automatic measurement process:
Automatic evaluation of the pressure loss curve
Automatic measurement of the fraction separation efficiency
Automatic evaluation of the pressure loss curve under varying burden states, incl. measurement of the fraction separation efficiency
Fig 3: Comparison of different oil separators
Quality assurance for oil separators
New and further development of oil separators, e.g. coalescence separators, cyclonic separators and other inertia separators, electrofilters and filter combinations, e.g. for
Oil mist downstream of compressors
Cooling lubricants on machine tools
Aerosols for minimal quantity lubrication
To enquire about the HMT 1000 HMT system and the options available contact us now.