[128] Graetz block (1)
In the Graetz rectifier
circuit (Graetz block), four non- return valves are combined to
form a function unit. The circuit diagram shows how this operates
in conjunction with a flow control valve; flow passes through
this valve from left to right during both the advance and return
strokes of the cylinder. The situation during the advance stroke
is shown.
During the advance stroke shown here, flow control is carried out on the inlet side.