Abstract: A labyrinth seal, has: rotating and static components rotatable relative to one another relative to a central axis, the rotating component securable to a shaft via a tight fit engagement at an engagement location on the rotating component, the static component securable to a housing; teeth protruding from one of the rotating and static components towards a seal land defined by the other one of the rotating and static components; and clearances between the teeth and the seal land, a first clearance of the clearances greater than a second clearance of the clearances, the first clearance located closer to the engagement location of the rotating component than the second clearance.

Abstract: A labyrinth seal, has: rotating and static components rotatable relative to one another relative to a central axis, the rotating component securable to a shaft via a tight fit engagement at an engagement location on the rotating component, the static component securable to a housing; teeth protruding from one of the rotating and static components towards a seal land defined by the other one of the rotating and static components; and clearances between the teeth and the seal land, a first clearance of the clearances greater than a second clearance of the clearances, the first clearance located closer to the engagement location of the rotating component than the second clearance.

Abstract: A device for deflecting a fluid flow comprises a casing having a circumferential wall defining a fluid passage, a rotating member disposed in the fluid passage for rotation about an axis substantially parallel to a flow of fluid within the fluid passage, a deflector extending radially from the rotating member for rotation therewith, and an outlet opening defined in the circumferential wall. The revolution of the deflector within the fluid passage forces the fluid to pass through the outlet opening where it can be collected by a strainer.

Abstract: A valve comprising a valve body defining a flow path, a seat upon which a closure member may rest for blocking an outlet port of the valve body, and a spacer removably mounted in the valve body to provide at least one arresting surface against which the closure member may abut when displaced in an open position by fluid pressure. The spacer prevent the closure member from frictionally contacting the inner surfaces of the valve body.