Bosch Rexroth | Z4WP6E68-2X5
Z4WP6E68-2X//5
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The Z4WP6E68-2X//5 spool valve is part of the Z4WE Solenoid Actuation Spool Valves series manufactured by Bosch Rexroth for directional control in hydraulic automation. It uses pneumatic actuation so an air pilot shifts the spool instead of an electric coil, which fits cabinets where compressed air is already available. The valve is built to nominal size 6, giving a compact interface that matches common subplates. Its mounting interface follows the porting pattern ISO 4401-03-02-0-05, and the symbol corresponds to NFPA D03, allowing designers to apply standard manifold layouts. A minimum pilot pressure of 4 bar is needed to move the spool, while 10 bar is the permitted maximum to avoid seal damage. The pilot chamber holds 4.24 cm³, defining the air volume that must be exhausted during each shift and directly influencing response time. Fast applications are supported because the mechanism can switch up to 7 200 times per hour.
The valve can be installed in any orientation, which simplifies piping on crowded machines. Ports P, A, and B withstand 315 bar, whereas the tank port T is limited to 160 bar, setting the safe operating envelope for cylinders and return lines. A maximum flow rate of 60 L/min is permitted, so the sizing suits medium-capacity actuators. Standard mineral oils such as HL and HLP according to DIN 51524 are approved, and the design also accepts biodegradable fluids HEES, HEPG, and HETG for environmentally sensitive sites. Fluid cleanliness must meet ISO 4406 class 20/18/15 to protect the spool fit from wear and sticking. With these limits observed, the valve provides reliable directional control in repetitive hydraulic sequences.
Technical Specifications
Actuation Type
Pneumatic
Bio Fluids
HEES, HEPG, HETG
Cleanliness Class
ISO 4406 20/18/15
Connection Diagram (nfpa)
D03
Hydraulic Fluid
HL, HLP (DIN 51524)
Installation Position
Any
Max Pressure (p/a/b)
315 bar
Max Pressure (t)
160 bar
Max Switching Frequency
7200 1/h
Maximum Flow
60 l/min
Maximum Pilot Pressure
10 bar
Minimum Pilot Pressure
4 bar
Nominal Size
6
Pilot Volume
4.24 cm³
Porting Pattern (iso)
ISO 4401-03-02-0-05
1620 Old Apex Road
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