HANNOVER MESSE 2018,
23 - 27 April
Designing pumps, compressors and other equipment, the aim is to prevent leakage into that can emerge at any point by liquids or gases.To solve this problem very often are used mechanical seals.To obtain the desired sealing function and an adequate lifetime of the mechanical seal,the preconditions must be fulfilled within the permitted tolerances at any time:- parallelism of the sealing surfaces- perpendicularity of the seal faces to the rotation axesspring- elastic contact of the sealing surfaces- existence of a lubricating film between the two sealing surfacesUsually the sealing capability of the mechanical seal against shaft or housing is obtained with the secondary seals, as O-rings, bellows or bootsIn conjunction with the International Organization for Standardization (ISO) and their standards (ISO 3069), the German Industrial Standard (DIN) published proposals for standard mechanical seals with DIN EN 12756 (24960).These proposals relate to the sealing rooms, main dimensions, designation and material codes.
Graphite seals consist of pure graphite.
Natural graphite is at first converted into intermediate graphite compounds, then pressed and rolled to form sheets, plates, ...
PTFE is the most reknown of the fluorinated polymers.
It is considered a thermoplastic though its viscosity at melting point (+327°C) is so high that it cannot ...
The function of gaskets is to prevent the leakage of medium outside the equipment.
Static seals are used in many applications such as plumbing and heating systems, ...
Mechanical gland packings provide a traditional, simple and cost effective way to seal pump shafts and valve stems.
Development in fibres, lubricants and braiding ...