A fluid valve including a valve body, a flow control member and a cavitation prevention assembly. The valve body has an inlet, an outlet, a fluid passage communicating fluid therebetween, and means for selectively opening and closing fluid communication between the inlet and the outlet. The flow control member is positioned within the fluid passage and has a central passage through which the fluid advances. The cavitation prevention assembly is positioned within the flow passage and is in flow communication with the inlet and the flow control member. The cavitation prevention assembly controls the pressure of the fluid entering the central passage to a level which is sufficiently low to prevent cavitation of the fluid.