Start with what the hydraulic circuit needs: ZU4708PB is an Enerpac ZU4 Electric Hydraulic Pump arranged for single-acting advance / retract operation. The valve behavior is intentionally simple: advance the single-acting tool, then release pressure for return. Applications that need a hydraulic hold step should use a hold-capable configuration instead.
What the ZU4708PB Model Number Means in Practice
ZU4 pumps share Enerpac’s Z-Class architecture, but valve type, reservoir size and control package vary substantially from model to model. This pump carries a 1.8 gal reservoir. That capacity is a practical selection factor when comparing otherwise similar valve and voltage configurations. A 1.7 hp motor drives the pump, with rated-pressure output specified at 60 in³/min @ 10,000 psi.
Confirm that the connected equipment uses the single-acting circuit this model is configured to control.
The adjacent model ZU4204JB helps clarify the choice. reservoir capacity is 1.8 gal on ZU4708PB versus 1.2 gal on ZU4204JB; that is the key separation between these two otherwise related pumps.
Pendant control lets the operator command the pump without standing at the valve body.
Specifications
| Pump Series | ZU4 Series |
|---|---|
| Power Source | Electric |
| Maximum Operating Pressure | 10,000 psi |
| Rated Oil Flow | 60 in³/min @ 10,000 psi |
| Reservoir Capacity | 1.8 gal |
| Valve Model | VM22 |
| Valve Configuration | 3-way, 2-position manual valve |
| Valve Operation | Manual |
| Cylinder Compatibility | Single-Acting |
| Voltage | 115V |
| Phase | Single Phase |
| Frequency | 50/60 Hz |