Start with what the hydraulic circuit needs: ZU4420JB is an Enerpac ZU4 Electric Hydraulic Pump arranged for double-acting advance / hold / retract operation. The 5.2 gal reservoir is at the larger end of this series, providing more available oil volume than the smaller-reservoir variants.
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 5.2 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.
Model-Level Guidance for ZU4420JB
A practical comparison is ZU4408JB. Between the two, reservoir capacity is 5.2 gal on ZU4420JB versus 1.8 gal on ZU4408JB. That gives the buyer a concrete reason to choose one model over the other.
Confirm that the connected equipment uses the double-acting circuit this model is configured to control.
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 | 5.2 gal |
| Valve Model | VM43 |
| Valve Configuration | 4-way, 3-position manual valve |
| Valve Operation | Manual |
| Cylinder Compatibility | Double-Acting |
| Voltage | 115V |
| Phase | Single Phase |
| Frequency | 50/60 Hz |