Differential pressure and breathing resistance
17Pages

Dichtheitsprufung ■ Durchflusspriifung • Funktionspriifung Differential pressure and breathing resistance of Mouth-nose masks (DIY masks, temporary masks, community face coverings) according to CWA 17553 Filtering masks (FFP masks) according to DIN EN 149 Medical masks (MNS, OP mask) according to DIN EN 14683

self protection with limitations with limitations external protection * NEW according to CWA 17553:2020-06; ** Bacterial filter performance (aerosol MPS 3 qm); *** Separation efficiency (liquid and solid aerosols <2.5 qm); **** Separation efficiency (liquid and solid aerosols 3.0 ± 0.5 qm) Mouth-nose-mask DIY-mask Community face coverings, Scarf Medical mask OP-mask mouth-nose-protection Filtering mask (FFP-mask) without valve Filtering mask (FFP-mask) with valve breathing resistance (according to DIN14683) Filtration rate of the used material

General obligation to wear a mask!? Essential for the wearing comfort and thus the acceptance of a mouth-nose-cover as it is specified today, is certainly the "ease of breathing” under the mask, which can be quantified with the measurement of the breathing resistance or pressure difference. Patients with breathing problems, who have to wear mouth-nose-masks for external protection, will have experiences of feeling of suffocated when the breathing resistance is high. Mouth-nose-covers, without references to a standard have, according to our measurements • often a much higher breathing...

Dicht heitspr ufung • Durchflusspr ufung • Funktionsprufung Test bench for pressure difference on Medical-face-masks according to DIN EN 14683 and community face coverings according to CWA 17553 automated version

Features: With the test station for pressure difference on medical-face-masks, the test is performed according to the specifications of DIN EN 14683 or CWA 17553. The material to be tested (mask, filter material) is manually inserted between the top and bottom part of the sample-holder without wrinkles and closed manually. Using the automatic testing device INTEGRA DFM 14683, the device provides edited settings and monitors all specifications and test parameters automatically. Channel 1 is used for adjustment and counter measurement of the flow rate, according to internal test guidelines....

Dichtheitsprufung ■ Durchflussprufung - Funktionsprufung Automated mass-flow- and pressure measuring device INTEGRA DFM 14683 (art. no. 1635) • automatic test run incl. presetting of values and limits • limit value monitoring of measured values • 256 test parameter sets for various product variants • mass-flow-controller 0...16 l/min with counter measurement of the vacuum mass-flow • measuring range of pressure difference 0...1400 Pa / cm2 (basing on a cross-section of 4.9 cm2) • internal data storage and RS232 printer interface for measured value documentation • power supply 110-230V /...

Test bench for pressure difference on medical face masks according to DIN EN 14683 and community face coverings according to CWA 17553

With the test bench for pressure difference on medical face masks, the test is performed according to the specifications of DIN EN 14683 and CWA 17553. The material to be tested (mask, filter material) is manually inserted between the top and bottom part of the sample holder without wrinkles and closed manually. After having opened the air supply and vacuum, a quantity of air flows, when the vacuum supply is switched on. This quantity of air is shown on the display of the mass-flow-controller and can easily be adjusted with the adjusting knob next to it. The specification of the standard is...

manual mass-flow- and pressure measuring device (art. no. 1633) • manual valve- and flow-rate adjustment • Mass-flow-controller 0...16 l/min with counter measurement of the vacuum mass-flow • measuring range of pressure difference 0...1400 Pa / cm² (with a flow area of 4.9 cm²). • power supply 230V / 50 Hz; app. 600 W • vacuum supply min. 12 Nl/min at 90 % final vacuum • size 450mm x 185mm x 380mm (w x h x d) Option: Mass-flow-sensor 0… 16 l/min for measuring the supplied air as a leak test of the sample-holder

Other components of the test bench: To set up a complete test station, the following components are required. Sample-holder to test breathability / pressure difference (art. no. 1632) The sample-holder is equipped with the opening width of 25 mm according to DIN 14683. The material specimen / mask is placed on the underside of the holder, the upper part is closed manually from above. The sample-holder is equipped with a height fine adjustment for different material thicknesses. The vacuum connection is located at the bottom, left side of the sample-holder. The supply air connection is...

Dichtheitsprufung • Durchf lusspr ufung • Funktionsprufung Test bench for breathing resistance on filtering masks according to DIN EN 149 and DIN EN 13274-3 as well as community face coverings according to CWA 17553

Features: With the test bench for breathing resistance on filtering masks according to DIN EN 149 and DIN EN 13274-3 as well as community face coverings according to CWA 17553, exhalation and inhalation processes with a static flow of up to 300 l/min (exhalation) and up to 120 l/min (inhalation) can be simulated. At the same time the resulting pressure in the "mouth area" of the Sheffield-testing-head for breathing resistance can be measured. This enables all breathing resistance measurements to be realized according to DIN EN 149, CWA 17553 and DIN EN 13274-3. The INTEGRA DFM 149 test...

automated mass-flow and pressure measuring device INTEGRA DFM 149 (art. no. 1639) • for measuring the inhalation and exhalation resistance • exhalation up to 300 l/min (static) • inhalation up to 120 l/min (static) • full automatic test process with digital specification of all settings • limit monitoring of all measured values • 256 test parameter sets for various product variants • internal data storage and RS232 printer interface for measured value documentation • mass-flow-control-unit 0.. .300 l/min with mass-flow precheck, reversible flow direction (Conditions: 23° C / 1000 mbar abs.)...