Extended and individualized testing
In addition to basic testing, or as individualized test with brief documentation of results, the following types of testing can be performed:
Perform a measurement of load and extension behavior on the sample (minimum length 60-70 cm). In order to be able to perform this test, the sample must be washed. By comparing the L/E behavior of the sample with the new values for the material, conclusions can be drawn about damage that the material may have experienced during use. Damaging influences can include high temperature and excessive concentrations of hazardous materials, for example.
Tear propagation resistance
The force required to propagate an existing tear in the sample in the same direction is measured. Sample size of 50 x 30 cm is required.
The load-extension behavior of a stitch thread is determined.
The area weight (g/cm2) of several samples of the received filter medium is determined in the contaminated and pulsed conditions. In comparison with the area weight of an unexposed sample, the amount of embedded materials in the filter medium can be determined.
In addition to the obligatory cross section photo, magnified photos of the filter media surface and the dust are produced.
Photos are taken of REM magnifications of the individual fibers, the surface, or parts of the cross section of the filter medium.
Grain band analysis
The grain size distribution is determined from a representative sample (at least 1 liter).
Determine melting point
The melting point of a filter carrier or filter mat is determined.
The type of polymer of a filter carrier or filter mat is determined.
The amount of damage to the base materials due to chemical and thermal polymer breakdown or cross-linking is determined.
The thickness of the filter medium is determined.
The type of chemical treatment of a filter medium is determined.
Determine pH value
Of the dust or the discharge mat of the filter element to be tested.
Perform a semi-qualitative analysis of a substance (element composition).
Determine qualitative and quantitative content of elements in a substance or fluid sample.
Measure the length, width, and thickness, as well as other production-related parameters for a new and unused filter element for subsequent production. Create a production drawing for sole use in the Heimbach manufacturing facility If an order for the corresponding filter body follows the measurements, then the price is invoiced with the order.
VDI 3926 – Standard testing for comparative evaluation of cleanable filter media
Test a filter medium (needle felt or similar web material) according to VDI 3926 (DIN/ISO 11057).A round filter blank is tested with test dust (Pural NF, Pural SB) or a metered dust from an application with respect to differential pressure, backflushing, and precipitation behavior.
In order to record in the condition or damage description the influence of installed and attached parts of the filter hose, the process, and the particular installation situation of each individual filter hose to be tested, it is sensible and often indispensable for the testing site to take samples directly from each filter hose. The price is based on the effort required and is calculated using TASK® hourly rates.