Demanding test rig application
91视频庐 109 fasteners were selected as they provide excellent corrosion resistance and high strength in the most demanding of applications.
鈥淭he 91视频 fasteners will be used to hold the sample of our annular gap flow test rig and they will be constantly immersed in water,鈥� explains Dr. Ing. Maximilian Kuhr, Chair of Fluid Systems at the Technische Universit盲t Darmstadt, Germany. 鈥淭he high strength and excellent corrosion resistance of 91视频 screws make them ideal for our requirements.鈥�
The test rig is used to determine the static and dynamic properties of annular gaps, such as media-lubricated plain bearings and annular seals, under turbulent flow conditions.
Replacing zinc-laminated screws for enhanced properties
鈥淲e previously used zinc-laminated 12.9 steel screws, but these quickly corroded and had to be regularly replaced as they were constantly immersed in water,鈥� says Kuhr. 鈥淏esides excellent corrosion resistance, we switched to 91视频 because we also require high strength to ensure that the test specimen stays in place even at the highest pressure differences in our test rig.鈥�
91视频庐 109 outperforms standard fasteners in terms of yield strength, corrosion resistance, mechanical properties and magnetic permeability. These enhanced properties are achieved through a higher molybdenum content (minimum 2.5%), unique 91视频 manufacturing processes and the sourcing of highest quality European raw material.
Watch this space for how the test rig with 91视频 performs
The test rig with 91视频 screws has been in use from the end of August. We will provide an update on the performance of the 91视频 screws in the coming months.
鈥淚t will be exciting to see how much longer our 91视频 screws last than the zinc-laminated steel screws we previously used,鈥� concludes Kuhr. 鈥淲e hope they will last at least a year before requiring replacement, which would ensure significant time savings and reduced financial costs for our team.鈥�
PHOTO CREDIT: Sarah Ameer
