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mounted from the front so they are easy to remove (Figure M 29). The advantage with this approach is the "uncluttered" design with its easy access. The disadvantage is how the pressure and delivery flow pulsation

interests can be harmonised across Europe to approach the European Commission with one voice. CETOP provides its members with information that is often not available elsewhere. This information includes [...] published worldwide as ISO standards. The preparation of standards and recommendations in collaboration with the national standardisation organisations and the related ISO and CEM technical committees is a

set for certain functions and thus individual valve sections. This can be implemented as required with the help of electronic flow sharing. Example: A hydraulic pump can deliver 100 l/min. Two consumers [...] control valves together require more than 100 l/min. If both valves were to request 70 l/min, the valve with the lower pressure would normally be fully supplied. By means of "Electronic Flow Sharing" the supply [...] y, i.e. each valve receives 50 l/min. "Electronic Flow Sharing" can be implemented in valve banks with the CAN-BUS . The electronic control unit onboard knows and monitors each individual valve section:

characteristics of proportional technology are the continuous, proportional transfer function associated with the valves and the amenability to control via electrical signals of the functions for flow rate based [...] adjust the operating variables for a process - particularly forces, velocities and positions - in line with optimal operating conditions and also improve the of the system. In addition, the constant refinement [...] considerable advantages in "normal" hydraulics by making it possible to simplify circuits greatly, with fewer pressure and flow valves needed thanks to the control valves used ( Figure P 22 ).

of fluid on the wall associated with the escape lifts the sealing lip and therefore remains on the surface. When the movement is reversed, this film comes into contact with the harder rear side of the seal

The kind of piston ring associated with the combustion engine can also be found in mechanical engineering. As a piston seal installed in a hydraulic cylinder , it has the advantage of showing very little [...] has practically the same effect as a gap seal , i.e. it is never possible to achieve a complete seal with it — not least because of the inevitable impact involved. The seal effect can be improved, however

25 to 0.5 μm with a contact ratio t p >50 % or R p <0.5); The thickness of the lubrication film (if the seal scrapes off the lubrication film, boundary friction or dry friction occurs with correspondingly

separates contaminations primarily on the inside (bulk) of the filtering material. Filter elements with several layers are used for this and are made of metal powder (sintered filer or fibrous materials [...] the filter. It is therefore misleading if volume (bulk) filters made of non-woven fabrics are marked with a filtration grade (e.g. 10μm).

has been achieved ( Figure S 77 ). As with this process, the system pump is completely exposed to contamination, it is recommended to use a flushing power pack with its own pump (normally a gear pump) for

wear-resistant, elastic materials with very high hardness (80-90 Shore A) and given a sharp edge to ease the stripping action. There are scrapers made of pure elastomers or with a metal part vulcanised into