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Structures Of Non-Positive Displacement Pumps
(AREA)
Abstract
Improved sealing device, of the type consisting of a rotating ring mounted on the neck of the impeller and which receives the recuperating action of an internal spring, and houses at one end the sealing seal by friction against a fixed plate affects the housing of the pump, essentially characterized in that said ring has three consecutive parts, one provided with the closing seal, another intermediate, in bellows, to absorb vibrations and act elastically against the other two extreme parts, achieving a higher closing pressure, and a third that adjusts on the impeller by threaded butt up to a step of it, thus achieving an additional tightness by said area. (Machine-translation by Google Translate, not legally binding)
Improvements in the joint hermetic bellows for joints with movement in all directions, in particular seals. (Machine-translation by Google Translate, not legally binding)
A double-intercept valve double device for a thermostatic set of derivation for cooling fluid circuit. (Machine-translation by Google Translate, not legally binding)