What kind of performance requirements should the rubber seals meet?
physical propertyThe seal is generally divided into static sealing and dynamic sealing in two forms, one of the typical example is the static sealing pipe sealing, after installed in the pipeline, the pipeline movements will cause the rubber seal (circle) and slow motion interface, while the rubber is in the static state of compression. Because most of the pipeline buried underground, so some outside factors such as temperature, ultraviolet radiation and other basic oxidation on aging seal has no effect, at this time of the rubber material can require a higher compression performance, others can reduce the requirements; a movable seal used in the process of rubber seal should have different physical properties. The representative of the dynamic seal valve seal, the sealing process, the addition of rubber stress, the surrounding environment is complicated, so the rubber seal in the process due to excessive squeeze decreased elasticity, or because of wear caused by leakage. Therefore, in this process, we must according to the seal between the valve sealing parts in the process of the use of different materials used require different physical properties, and effectively solve the rubber seal and deformation, because of the long-term use of sealing effect reducing problems.
The rubber seal is made of all kinds of rubber materials play an important role in the basic elements of the sealing process, sealing is an important performance of some machinery must have, so the requirements of the material made of seal is very high, the following will take you to see the specific performance requirements of rubber seal materials used:
Hygienic propertyRubber products is the basic appearance of bread wrapped in a layer of rubber material, the appearance is basically the same, but the internal quality will have great differences, in the process of sealing performance using rubber seal strengthening of certain products, we must avoid pollution problems, so in the use of rubber sealing, material requirements, must be used non-toxic materials and prohibited the use of recycled rubber seals, and suitable for drinking machine and other products on the GB/T17219-1998 must pass "drinking water distribution equipment and protective materials safety evaluation standards" or BS6920:2000 "through the test of non - metallic products non-toxic effects on water quality for inspection of the body contact".Above is the performance requirements for rubber experts to introduce you to the Luo Geng mechanical seals are used to seal materials, there are various types, in use to different products, we need to use the seal will be different, but most of the time to see in addition to seal the dimensions, we see the seal of the materials used, whether has the properties we need, so as to determine whether the rubber seal products.
