If single-acting advance / hold / retract operation is the defining requirement, ZU4308MB is the Enerpac ZU4 Electric Hydraulic Pump version to evaluate. For a single-acting circuit, the hold function separates this model from simple dump-style pumps by allowing hydraulic pressure to be maintained between advance and return.
Understanding the ZU4308MB Arrangement
ZU4 pumps share Enerpac’s Z-Class architecture, but valve type, reservoir size and control package vary substantially from model to model. For single-acting equipment, ZU4308MB uses a 3-way, 3-position manual valve with advance / hold / retract functionality. Power input is 115V, single phase, 50/60 Hz. That requirement should be matched to the facility, generator or jobsite supply.
Confirm that the connected equipment uses the single-acting circuit this model is configured to control.
If the shortlist includes ZU4308JB, focus on the configuration change: pendant control is No on ZU4308MB versus Yes on ZU4308JB. The remaining shared family characteristics should not obscure that difference.
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 | VM33 |
| Valve Configuration | 3-way, 3-position manual valve |
| Valve Operation | Manual |
| Cylinder Compatibility | Single-Acting |
| Voltage | 115V |
| Phase | Single Phase |
| Frequency | 50/60 Hz |