Bulk liquid carrier closures
![Press-fit valve collars [PDV14192]](/sites/default/files/styles/case_study_gallery_540w/public/case-study/2020-12/1650-PDV14192-1-web.jpg.webp?itok=5HrBrRab)
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Customised engineering example
Our client manufactures liquid bulk carriers fitted with two-part plastic valve closures. The collar is welded to a plastic bag, and the valve closure is fixed onto it by a compression joint.
These joints are tested to establish the breaking force required to pull them apart. The tensile force can be as much as 25 kN.
Mecmesin designed a robust collar-retaining plate and a valve holder attached to the loadcell on a flexible link. This allowed a degree of self-alignment so that both parts are secured without damage or distortion. The collar and valve are then pulled apart axially and uniformly on a twin-column test stand, with the peak tension force being recorded by the tester.
![Press-fit valve collars [PDV14192]](/sites/default/files/styles/case_study_gallery_540w/public/case-study/2020-12/1650-PDV14192-1-web.jpg.webp?itok=5HrBrRab)
