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Royal De Boer Stalinrichtingen B.V. Akwatopsoft Waterbed

DLG-APPROVED “Deformability/Elasticity, Permanent Tread Load”

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The Approval

A test mark „DLG-APPROVED for individual criteria“ is awarded for agricultural products which have successfully fulfilled a scope-reduced usability testing conducted by DLG according to independent and recognised evaluation criteria. The test is intended to highlight particular innovations and key criteria of the test object. The test may contain criteria from the DLG test scope for overall tests, or focus on other value-determining characteristics and properties of the test subject. The minimum requirements, test conditions and procedures as well as the evaluation bases of the test results will be specified in consultation with an expert group of DLG. They correspond to the recognised rules of technology, as well as scientific and agricultural knowledge and requirements. The successful testing is concluded with the publication of a test report, as well as the awarding of the test mark which is valid for five years from the date of awarding.

The DLG Appoved Test “Deformability/Elasticity, Permanent Tread Load” includes technical measurements on test stands of the DLG Test Center. The deformability and elasticity were measured and a permanent tread load was applied. The test was based on the DLG Testing Framework for elastic stable flooring, as of December 2018 and DIN 3763:2020-04 (Elastic floorings for cattle and dairy cows walking and rest surfaces – Requirements and testing). 
Other criteria were not investigated.

Assessment – Brief Summary

The Akwatopsoft Waterbed tested here, an elastic floor covering for the resting area in cubicle houses, was investiga­ted with regard to durability and comfort properties on test stands in the DLG Test. The deformability and elasticity of the waterbed were measured and a permanent tread load was applied. 
Requirements of DIN 3763 are fulfilled. 

Deformation and Elasticity corres­ponds to class 4 DIN 3763.

Table 1: Assessment in brief

DLG Quality profileEvaluation*
Deformability and elasticity in new condition+++++
Deformability and elasticity following endurance test+++++
Lasting deformation following endurance test+++++
Wear following endurance test++++

DLG Evaluation range:
* +++ or better = meets, exceeds or significantly exceeds the established DLG standards,
++  = meets the legal requirements for marketability,
+=  = failed

The Product

Description and Technical Data

The black Akwatopsoft Waterbed made of rubber is an elastic floor covering in the lying area for high boxes in recumbent boxes.
Stable flooring as rolled goods with two synthetic fabrics reinforced

  • Top: screen-printed profiling
  • Underside: rough, finely structured surface
  • Underlay: 40 mm PU foam wraped with plastic film

During the production process arise between the two fabric layers, the individual berths, by surrounding each cavity around a rim of SBR rubber/Natural rubber and fabric inserts vulcanized.

Table 2: Main dimensions and weight

Lengthof railway goods
Width180 and 190 cm
Thickness with water fillingapprox. 70 mm
Thickness without water fillingapprox. 49 mm
Weight without water fillingapprox. 10.0 kg/m2

Table 3: Available box width and water filling

box widthwater filling
110,0 cmapprox. 45 litres
112,5 cmapprox. 46 litres
115,0 cmapprox. 48 litres
117,5 cmapprox. 49 litres
120,0 cmapprox. 50 litres
122,5 cmapprox. 51 litres
125,0 cmapprox. 53 litres


The Method

Deformability and elasticity

The deformability is measured in new condition and following permanent tread load using ball penetration tests with a calotte (r = 120 mm) and a penetration force of 2,000 N (corresponding to approx. 200 kg).

Permanent tread load

The permanent tread load is measured on a test stand with a round steel foot in the standard test programme with 100,000 alternating loads at 10,000 N (corresponding to approx. 1,000 kg). The steel foot is adapted to the natural conditions as an “artificial cow foot”. The foot has a diameter of 105 mm and therefore a contact area of 75 cm²; the carrying edge of the hoof is simulated by a 5 mm wide ring on the periphery of the sole that projects 1 mm above the rest of the surface.

The Test Results in Detail

Deformability and elasticity

In the ball penetration tests in new condition with a calotte (r = 120 mm), penetration depth was 36.0 mm. The resulting calculated bearing pressure of 7.4 N/cm² indicates a low load on the carpal joints when lying down and getting up. Elasticity was measured following a permanent tread load exerted by a steel foot (contact area: 75 cm²) with 100,000 alternating loads at 10,000 N. Following the endurance test, the penetration depth of the calotte decreased from 36.0 mm to 32.4 mm. The bearing pressure increased from 7.4 N/cm² to 7.6 N/cm² (see Fig. 2).  This means that deformability and elasticity slightly decrease.


Permanent tread load

No noticeable wear was observed following exposure to permanent tread load on a test stand with 100,000 alternating loads at 10,000 N. No lasting deformation was observed.


Based on test-stand investigations, the criteria tested in this DLG Approved Test evaluate the comfort and durability properties of the Akwatopsoft Waterbed for use in the resting area of high cubicles in cubicle houses. The tested Waterbed met the requirements of DIN 3763 and the DLG Testing Framework with respect to the investigated criteria.

Applicant and Test implementation

Manufacturer and Applicant

Manufacturer and Applicant
Royal De Boer Stalinrichtingen B.V.
Vestaweg 5, 8938 AV Leeuwarden

Telefon 0031 646831516 

Further information

Testing agency
DLG TestService GmbH, 
Gross-Umstadt location
The tests are conducted on behalf of DLG e.V.

DLG test framework
DLG Testing Framework for elastic stable flooring, 
as of April 2010 

DIN 3763:2020-04 (Elastic floorings for cattle and dairy cows walking and rest surfaces – Requirements and testing)


Division head
Dr. Ulrich Rubenschuh

Test engineer(s)
Dr. Harald Reubold *

*    Author


DLG TestService GmbH - Groß-Umstadt location • Max-Eyth-Weg 1 64823 Groß-Umstadt Germany • Tel.: +49(0)69 24 788-611 •