Quality

Quality control


In order to ensure continuous quality, it is necessary to continuously monitor the tolerances and the surface smoothness of the profiles. This type of checks is one of the aspects that lead to a permanent high quality in our production of precision filter tubes.

In addition to our regular checks, our customers receive material certificates in accordance with the EN 10204 standard (DIN50049) if they wish.

Quality control


In order to ensure continuous quality, it is necessary to continuously monitor the tolerances and the surface smoothness of the profiles. This type of checks is one of the aspects that lead to a permanent high quality in our production of precision filter tubes.

In addition to our regular checks, our customers receive material certificates in accordance with the EN 10204 standard (DIN50049) if they wish.

Measuring instruments


The vast majority of the filter tubes are checked with a slide gauge, micrometre, three-point meter, height gauge and/or thickness gauge (for the gap opening).

Measuring instruments


The vast majority of the filter tubes are checked with a slide gauge, micrometre, three-point meter, height gauge and/or thickness gauge (for the gap opening).

Scanner

The scanners, used to check the gap widths of the filter tubes, measure with an accuracy of up to 1/10000 mm.

With one scanner we can check filters with a diameter of up to 70 mm. With another scanner up to a diameter of 215 mm.

The scanners are usually used when it is impossible to correctly check the gap opening with thickness gauge or at the customer’s request. This is usually the case with gap widths smaller than 25 microns.

The measurement report shows the following information:

- Nominal and actual gap opening

- Above and below tolerance

- Average gap opening

When the average is close to the nominal gap width, we speak of an accurate filter tube in terms of tolerance.

Scanner

The scanners, used to check the gap widths of the filter tubes, measure with an accuracy of up to 1/10000 mm.

With one scanner we can check filters with a diameter of up to 70 mm. With another scanner up to a diameter of 215 mm.

The scanners are usually used when it is impossible to correctly check the gap opening with thickness gauge or at the customer’s request. This is usually the case with gap widths smaller than 25 microns.

The measurement report shows the following information:

- Nominal and actual gap opening

- Above and below tolerance

- Average gap opening

When the average is close to the nominal gap width, we speak of an accurate filter tube in terms of tolerance.