17:19 Jan 29, 2011 |
English to Greek translations [PRO] Tech/Engineering - Construction / Civil Engineering / flanged control valves | |||||||
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4 | φορτισμένο παρέμβυσμα, παρέμβυσμα με ελατήριο |
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φορτισμένο παρέμβυσμα, παρέμβυσμα με ελατήριο Explanation: Η ακριβής απόδοση εξαρτάται από τον τύπο της βαλβίδας, και συγκεκριμένα από τον τρόπο υλοποίησης της συμπίεσης του στεγανωτικού υλικού (σαλαμάστρας/τσιμούχας κλπ) Αυτά θα σε βοηθήσουν να ξεκαθαρίσεις την εικόνα... http://www.valvemagazine.com/index.php/magazine/past-article... «Live Loading In its simplest form, live loading is the application of a spring load to the gland follower of a packed valve. A Belleville spring between the gland follower and its fastening studs and nuts provides an effective way to establish and maintain a controlled amount of stress in the packing set. The amount of the packing stress in a live-loaded system can be controlled by the size of the Belleville spring used and how far it is compressed or deflected. In a live-loaded packing system, the follower will continue to push against the packing even when packing volume is lost (by friction, extrusion, consolidation, etc.) The spring load will be slightly reduced as the springs expand, but this reduction in load will be much less than the load that is lost if the packing set was not live loaded. This remaining load allows the packing stress to remain at a level above the minimum sealing stress and enables the packing to remain leak free. There are many reasons why packed valves leak.» http://www.google.com/url?sa=t&source=web&cd=1&ved=0CBUQFjAA... |
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