Patent ID: 6827330
Filing Date: 2004-12-07
Classification: F25B,Y02B

Abstract:
A pressure regulating valve for a refrigerating plant comprising:a guide; a slider member movable relative to the guide between a closed position and a fully open position during which the guide and slider member operate according to different valve principles depending on the position of one relative to the other; drive means for moving the slider member relative to the guide with variable throttle resistance being created between the guide and the slider member; and wherein during one portion of the movement of the slider member relative to the guide, an edge portion defined by the guide cooperates with a wall portion defined by the slider member to define a gap that progressively increase the closed position to a partially open position and during another portion of the movement that begins after the edge portion clears the wall portion, one of the slider member and the guide defines an opening for allowing flow therethrough, and the other of the slider member and the guide defines a portion that progressively covers or uncovers the opening.