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DANGER: Do not handle pressurized hoses. Escaping
oil under pressure can penetrate the skin, causing
serious injury. If oil is injected under the skin, see a
doctor immediately.
WARNING: Only use hydraulic cylinders in a coupled
system. Never use a cylinder with unconnected
couplers.
If
the
overloaded, components can fail catastrophically causing
severe personal injury.
IMPORTANT: Hydraulic equipment must only be
serviced by a qualified hydraulic technician. For repair
service, contact the Authorized ENERPAC Service
Center in your area. To protect your warranty, use only
ENERPAC oil.
WARNING: Immediately replace worn or damaged
parts by genuine ENERPAC parts. Standard grade parts
will break causing personal injury and property
damage. ENERPAC parts are designed to fit properly and
withstand high loads.
WARNING:
Do not use electric pumps in an
explosive atmosphere. Adhere to all local and
national electrical codes. A qualified electrician must
do installation and modification.
Specifications for Two-stage Pump
Model Number
Voltage
Amp Draw
Temperature Range
Viscosity Range
Hydraulic Oil
Seal Material
Max. Operating
Pressure
Horse Power
Reservoir Capacity
High Flow Rate
Low Flow Rate
Weight
cylinder
becomes
Single Stage
Single Stage
Pressure - psi (bar)
WEN4020B
115V / 230V - 1PH-60 Hz
22/11
41-140°F [5-60°C]
150-165 S. U.S.
[15-250c. St]
HLP 23 ISO 3448-1975
BUNA-N
5000 psi
350 bar
1.5 HP [1,1 kW]
5.0 gal [20 lit]
640 cu. in / min @ 100 psi
[10.5 lt/min@6.9 bar]
120 cu. in /min@5000 psi
[1.97 lt/min@350 bar]
199 lbs. [90 kg]
WARNING:
neutral position to prevent accidental cylinder
operation. Keep hands clear of moving parts and
pressurized hoses.
WARNING: These pumps have factory adjusted relief
valves, which must not be repaired or adjusted
except by an Authorized Enerpac Service Center.
extremely
CAUTION:
motor, check specifications. Use of incorrect power
source will damage the motor.
3.0 SPECIFICATIONS
3.1 Flow Charts – at 60 HZ
Oil flow and motor speed at 50 Hz will be 5/6 of this value.
4.0 INSTALLATION
Install the pump to ensure that air flow around the motor and
pump is unobstructed. Keep the motor clean to ensure
maximum cooling during operation.
4.1 Valve Mounting (Figure 1)
1.
Remove the plate.
2.
Put O-rings and back-ups on the connector.
3.
Attach the gasket, connector assembly, and valve assembly to
the pump. Do not damage the O-rings while installing the
connector.
2
Start the pump with the valve in the
To prevent damage to pump electric
Two Stage
Pressure - psi (bar)
WEN4020G
230V/460V - 3PH-50/60 Hz
7.0/3.5
41-140°F [5-60°C]
150-165 S. U.S.
[15-250c. St]
HLP 23 ISO 3448-1975
BUNA-N
5000 psi
350 bar
1.5 HP [1,1 kW]
5.0 gal [20 lit]
640 cu. in / min @ 100 psi
[10.5 lt/min@6.9 bar]
120 cu. in /min@5000 psi
[1.97 lt/min@350 bar]
194 lbs. [88 kg]
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