Compressed air filter test bench

The newly developed DFP 3000 compressed air filter test bench provides fully automated measurement of the fractionation efficiency of compressed air filters at overpressures up to 7 bar, offering better results than the process described in ISO 12500. Additional filter funnels are also available upon request for plate media. Fractionation efficiency can be measured using the new Promo® 3000 P aerosol spectrometer, equipped with a pressure-resistant Welas® aerosol sensor for measuring both feed and clean gases. This system offers the following advantages (and others):

• Clear determination of particle size and concentration directly at overpressures up to 10 bar

• Automatic adjustment of sampling volumetric flow rate in response to pressure changes

• No disperser or dilution required

The DFP 3000 can be equipped with three different aerosol generators:

• For measuring oil fractionation efficiency: PLG 3000

• For feed testing with short oil feed times: AGF 3000

• For solid particle testing up to 3 bar: RBG 1000 D

Highly automated test sequence setup, along with clearly defined individual components and individually adjustable sequence programs in the FTControl filter testing software, provides highly reliable measurement results.

All air volumetric flow rates and overpressures in the system are automatically monitored and adjusted. Results are presented and analyzed in detailed tables and graphs. Palas®, with over 120 complete filter testing systems delivered in 16 different versions, is a world-leading manufacturer of filter testing systems.

Standards

Complies with the following standards: General ventilation air filter testing system EN779/ASHRAE52.2. vacuum cleaner testing system DIN33891. automotive air filter testing system DIN71460. oil mist separator testing system HMT-1000. and scanning HEPA filter leak detection and efficiency measurement system;

Quality Details

1. Mobile testing unit with portable clean gas and easy filter replacement: The mobile clean gas unit allows for easy use of filter housings of different sizes.

2. Variable aerosol generation: Different dispersers are used for DEHS, dust, etc., enabling shorter measurement times, for example, by increasing aerosol concentration.

3. Wall-flow separator: A drain valve prevents oil particles separated from the feed gas pipe wall from entering the filter housing.

4. Light scattering aerosol spectrometer: The Promo® 3000 P is used for clear particle measurements directly at overpressures up to 10 bar; the integrated automatic adjustment of sampling volume flow rate under pressure changes ensures accurate measurement conditions.

5. Welas® 2xxx P series flexible, pressure-resistant aerosol sensors can be used for direct particle measurement of feed gas and clean gas at overpressures up to 10 bar; thanks to the Welas® aerosol sensor (finely tuned for different aerosol concentrations in feed gas and clean gas, eliminating the need for a dilution system),

Aerosol generation

DFP The PLG 3000 can be equipped with three different aerosol generators:

• For measuring oil fractionation efficiency: PLG 3000

The PLG 3000 is used to measure fractionation efficiency and for feeding oily aerosols. The oil flow rate can be adjusted via a diffuser in the range of approximately 0.2 – 12 g/h.

• For feeding tests with short oil feeding times: AGF 3000

The AGF 3000 is used in oil-based aerosol feed filters. Thanks to its special nozzle, this unit can generate a mass flow rate of up to 29 g/h. This minimizes loading time. The generator is equipped with an automatic refill system for oil supply.

• Solid particle testing up to 3 bar: RBG 1000 D

The RBG 1000 is used to measure fractionation efficiency and for dust feeding. Due to the use of interchangeable solid containers, the RBG 1000 P offers a particularly wide concentration range during diffusion.

The automated DFP 3000 features an integrated mass flow controller for regulating the volumetric flow rate through the aerosol generator and the dispersion volumetric flow rate. A pressure control valve located at the system inlet allows for automatic setting of the system pressure for filter testing. The filter testing software FTControl can perform filter tests individually and automatically using pre-programmed sequence programs for measurement procedures. The sequence programs allow for predefinition of two test parameters (including the main volumetric flow rate, system pressure, and aerosol generator control) and specification of the filter test sequence:

• Measure fractionation efficiency during feeding; pressure loss or measurement time can be pre-selected as a stop criterion.

• Define and display pressure loss and retention curves graphically and tabularly.

• Display particle size at separation efficiencies of 80% and 95%.

• Compare fractionation efficiency at different feeding stages.

• Reduce measurement time, for example, by increasing aerosol concentration.

Integrated sensor data, such as filter volumetric flow rate, system pressure, and differential pressure, are also automatically recorded during filter testing.

Technical parameters

Advantage

Particle Measurement Overview

• Internationally comparable measurement results

• High reproducibility of test methods

• Easy-to-use testing for a wide range of aerosols, such as DEHS, SAE Fine, and Coarse

• Flexible filter testing software FTControl

• Flexible programmable sequence programs for pressure loss measurement, fractionation efficiency measurement, and feed measurement

• Fully automated and repeatable test sequences, including pressure and volumetric flow control

• Easy to operate; even untrained personnel can quickly use the equipment

• Short setup time

• Customer-initiated cleaning and calibration

• Easy use of measurement technology components – even in other applications

• Mobile unit, movable with casters

• Reliable operation

• Validation of individual components and the entire system during pre-delivery acceptance testing and upon delivery

• Low maintenance

• The equipment will reduce your operating cost

Application Areas

• Testing of complete filters superior to ISO 12500

• Testing filter media

• Determining emissions during loading