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Enerpac ZU-Series, Electric Pumps

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Enerpac ZU-Series electric pumps are workhorse electric-driven hydraulic power units rated to 10,000 PSI (700 bar), built to move high oil flow for fast cylinder cycle times on bolting, lifting, and press work. A ZU unit is defined by its motor voltage and horsepower, usable oil capacity, valve configuration, and flow rate at pressure — match those to your tool draw and duty cycle before you order. Running an older or discontinued Z-class unit and need the current equivalent? send your specs for a cross-reference.

Enerpac ZU4220JB Portable Electric Pump, VM32, 115V, STD, 20L

Item SKU: ZU4220JB

How to Choose an Enerpac ZU-Series Electric Pump

Oil flow (CID / GPM) — The volume the pump delivers per cycle and per minute drops as pressure climbs; size it to the cylinder volume and the cycle time the job demands. Higher flow means faster advance and retract.
Max pressure (PSI) — Enerpac high-pressure tools and this pump line are rated to 10,000 PSI (700 bar). Confirm every cylinder, hose, and coupler in the circuit carries the same rating.
Motor & voltage — ZU units run on single- or three-phase electric power; match the voltage and horsepower to the receptacle and breaker at the work site so the motor pulls full speed under load.
Valve configuration — Manual, solenoid, or remote valving sets how you control advance, hold, and retract; pick by whether the operator works at the pump or at a distance.
Usable oil capacity — The reservoir must hold enough usable oil to fully stroke every cylinder on the circuit at once, plus a reserve. Undersized tanks starve the pump at full extension.
Port & coupler thread — Verify the outlet port and coupler style match your hose ends so the unit drops into your existing hose set without adapters.

Which Enerpac Electric Pump Is Right for the Job?

The ZU-Series is the high-flow electric workhorse for production bolting and repetitive cycling. If you want a quieter, more configurable controller with onboard diagnostics, compare the Enerpac ZE-Series electric hydraulic pumps, or step up to the higher-capacity Enerpac ZE6-Series electric hydraulic pumps for larger reservoirs and heavier duty cycles. When two or more cylinders must move in true synchronization, choose the Enerpac SFP-Series electric split flow hydraulic pumps; where no electric outlet is available on site, the Enerpac XC-Series cordless hydraulic pumps run off a battery instead.

Complete the System

A ZU pump is the power source for a full high-pressure circuit. Add or upsize hydraulic reservoir tanks when your usable oil demand grows, and protect the pump with inline hydraulic filters to keep contamination off the valving. Tie the unit to your tools with 10,000 PSI-rated hydraulic quick couplers for fast tool changes, and if your application calls for continuous rotary output rather than cylinder actuation, pair it with the right hydraulic motors.

Cross-Referencing an Obsolete Enerpac ZU-Series Electric Pump

Older Z-class and discontinued Enerpac electric pump models almost always have a current ZU or ZE equivalent that fits the same circuit and pressure class. Northern Hydraulics has cross-referenced obsolete hydraulic power units to in-stock replacements since 1963, so a model number you can no longer source from the factory is usually one lookup away from a working unit. Give us the legacy part number, your oil flow and voltage needs, and your valve configuration, and we will match it to a ZU-Series equivalent. request a cross-reference.

Enerpac ZU-Series, Electric Pumps – Frequently Asked Questions

How do I size an Enerpac ZU-Series electric pump for my job?

Start with the total oil volume needed to fully stroke every cylinder on the circuit, then pick a flow rate that delivers that volume in your target cycle time. Confirm the unit's usable oil capacity exceeds your total cylinder demand, and match the motor voltage to the power available at the work site.

What pressure are Enerpac ZU-Series pumps rated to?

The ZU-Series is part of Enerpac's high-pressure line, typically rated to 10,000 PSI (700 bar). Every cylinder, hose, coupler, and gauge in the circuit must carry the same 10,000 PSI rating for the system to operate safely at full pressure.

What electrical supply does a ZU pump need?

ZU units are offered in single- and three-phase electric configurations across a range of voltages. Check the motor horsepower and voltage on the model you choose against the receptacle and breaker capacity on site so the motor reaches full speed under load.

What is the difference between the Enerpac ZU-Series and ZE-Series electric pumps?

The ZU-Series is the high-flow electric workhorse aimed at fast cycle times and production bolting. The Enerpac ZE-Series electric hydraulic pumps typically add a quieter motor, more valve and control options, and onboard diagnostics for applications that need finer control.

Which Enerpac pump do I need to run two cylinders in sync?

For lifts or presses where two or more cylinders must advance together, use a split-flow unit that meters equal oil to each outlet. The Enerpac SFP-Series electric split flow hydraulic pumps are built for synchronized multi-cylinder work, where a single-outlet ZU is not.

What accessories do I need to run a ZU-Series pump?

At minimum you need 10,000 PSI-rated hose and hydraulic quick couplers to connect your tools, plus a cylinder or torque tool rated to match. Inline hydraulic filters keep contamination off the valving and extend pump life.

Can I use a ZU pump if no AC power is available at the job site?

No — ZU-Series pumps require an electric outlet. For remote or off-grid work, use the battery-powered Enerpac XC-Series cordless hydraulic pumps instead.

My Enerpac electric pump is discontinued. Can you cross-reference it?

Yes. Most older Z-class and discontinued Enerpac electric pumps have a current ZU or ZE equivalent in the same pressure class. Send us the legacy model number, oil flow, voltage, and valve configuration and we will match it to a stocked replacement — request a quote.

Enerpac ZU-Series, Electric Pumps

Enerpac ZU4220JB Portable Electric Pump, VM32, 115V, STD, 20L

Enerpac ZU4308PB Portable Electric Pump, VM33M, 115V, STD, 8L

Enerpac ZU4704MB Portable Electric Pump, VM22, 115V, STD, 4L

Enerpac ZU4408MB Portable Electric Pump, VM43, 115V, Standard, 8L

Enerpac ZU4408PB Portable Electric Pump, VM43M, 115V, STD, 8L

Enerpac ZU4320MB Portable Electric Pump, VM33, 115V, Standard, 20L

Enerpac ZU4420MB Portable Electric Pump, VM33, 115V, Standard, 20L

Enerpac ZU4104DB Portable Electric Pump, VE32D, LCD, 115V 4L

Enerpac ZU4420PB Portable Electric Pump, VM43M, 1STD115, 20L

Enerpac ZU4420JB Portable Electric Pump, VM43, 115V, STD, 20L

Enerpac ZU4320LB Portable Electric Pump, VM33, 115V, LCD, 20L

Enerpac ZU4108DB Portable Electric Pump, VE32D, LCD, 115V 8L

Enerpac ZU4120DB Portable Electric Pump, VE32D, LCD, 115V 20L

Enerpac ZU4308JB Portable Electric Pump, VM33, 115V, STD, 8L

Enerpac ZU4308LB Portable Electric Pump, VM33, 115V, Standard, 8L

Enerpac ZU4308MB Portable Electric Pump, VM33, 115V, Standard, 8L

Enerpac ZU4408JB Portable Electric Pump, VM43, 115V, STD, 8L

Enerpac ZU4408LB Portable Electric Pump, VM43, 115V, LCD, 8L

Enerpac ZU4420LB Portable Electric Pump, VM43, 115V, LCD, 20L

Enerpac ZU4704PB Portable Electric Pump, VM22, 115V, STD, 4L

Enerpac ZU4708PB Portable Electric Pump, VM22, 115V, STD, 8L

Enerpac ZU4720PB Portable Electric Pump, VM22, 115V, STD, 20L

How to Choose an Enerpac ZU-Series Electric Pump

Which Enerpac Electric Pump Is Right for the Job?

Complete the System

Cross-Referencing an Obsolete Enerpac ZU-Series Electric Pump

Enerpac ZU-Series, Electric Pumps – Frequently Asked Questions

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