Abstract: Digital fluid flow control apparatus comprises a generally cylindrical valve body (10) having a cylindrical axis. An inlet (27) to the valve has an axis extending radially from the cylindrical axis. An outlet (29) from the valve has an axis extending radially from the cylindrical axis in alignment with the inlet axis. A cylindrical manifold (20) is coaxially disposed in the valve body in a laterally displaced relationship with the inlet and outlet. An annular manifold (24) is coaxially disposed in the valve body in laterally spaced relationship with the inlet and outlet. The annular manifold lies between the cylindricalmanifold and the inlet and outlet and surrounds a portion of the valve body. A passage (21, 25) extends through the valve body from the inlet to one of the manifolds. Another passage (30) extends through the valve body from the outlet to the other manifold. The passage to the cylindrical manifold passes through the portion of the valve body (31) surrounded by the annular manifold.