[104] 4/2-way valve, two pistons (1)
The 4/2-way valve has two
working ports A and B, a supply port P and a tank port T. The
supply port is always connected to one of the working ports,
while the second working port is routed to the tank. In the
normal position, there is flow from P to B and from A to
T.
In contrast to valves with three pistons, 4/2-way valves with two pistons do not require a leakage-oil port (see topic 106).