Abstract: Various implementations include a valve having a body, a diffuser, and a ball. The body defines a cavity and inlet and outlet ports extending to the cavity. A first diffuser end defines a diffuser central channel extending to a second diffuser end. The diffuser insert is disposed within the cavity such that the second diffuser end is adjacent the outlet port. The ball outer surface defines a groove extending circumferentially along a center line at least partially around a circumference of the ball. The groove has a V-shaped profile in a plane perpendicular to the center line. A depth of the groove tapers along the centerline from a shallowest groove portion to a deepest groove portion. The ball is rotatably disposed within the cavity such that the ball is adjacent the first diffuser end and the inlet port.