Abstract: Apparatus for providing an adjustable flow of quenching fluid to a traveling rod or the like. The rod travels through a quench housing assembly having a fixed valve surface surrounding the path of travel of the rod. A movable valve member having an internal passage aligned with the direction of rod travel is supported within the housing assembly for a limited extent of axial travel, and the movable valve member provides a valve surface which is in confronting relation to the fixed valve surface. A cam engages a slot on an exterior surface of the movable valve member. The cam is connected to a cam shaft which extends to a location outside of the housing assembly. The cam, when rotated by the cam shaft, axially moves the valve member to adjust the fluid flow aperture defined by the confronting valve surfaces.