Enerpac ACL Series, Instruction Sheet

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2
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 cylinder becomes extremely overloaded, components
can fail catastrophically causing severe personal injury.
IMPORTANT: Hydraulic equipment must only be
serviced by a qualifi ed 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 fi t properly and withstand high
loads.
WARNING: Do not overcharge the accumulator.
Accumulator pre-charge pressure should not exceed
80% of the hydraulic system working pressure.
Maximum hydraulic system pressure must not exceed 5000 psi
[350 bar].
WARNING: Use only approved recharging equipment.
Recharge using inert gas, such as nitrogen. Follow all
charging instructions.
WARNING: Prior to performing maintenance on the
accumulator or associated hydraulic lines, always
discharge hydraulic oil and nitrogen gas.
WARNING: To avoid internal seal damage, use only
Enerpac hydraulic oil in the accumulator oil chamber.
Seals are not designed for water or other liquids.
3.0 SPECIFICATIONS
Model
Number
Max.
Rated
Oil Volume
in
3
[cm
3
]
Gas
Volume
in
3
[cm
3
]
Hydraulic
Operating
Pressure
psi [bar]
Pre-charge
Nitrogen
Pressure
psi [bar]
Usable Oil Capacity at:
5000 psi [350 bar]
in 3 [cm 3 ]
3500 psi [250 bar]
in 3 [cm 3 ]
2000 psi [140 bar]
in 3 [cm 3 ]
ACL21
ACL21A
ACL22
ACL22A
0.90
[14,7]
1.22
[20,0]
1500-5000
[100-350]
1450
[100] 0.53
[8,7] 0.43
[7,0] 0.12
[2,0]
ACL201
ACL201A
ACL202
ACL202A
7.70
[127,5]
10.37
[170,0]
1500-5000
[100-350]
1450
[100] 4.51
[73,9]
3.54
[58,0]
1.22
[20,0]
ACL502
ACL502A 20.6
[337,8]
27.46
[450,0]
1500-5000
[100-350]
1450
[100] 12.0
[196,6]
9.33
[152,9]
3.29
[53,9]
4.0 DESCRIPTION
The ACL series of accumulators use a nitrogen pre-charge
to maintain system pressure and dampen shock loads. The
diaphragm design allows fast response and total discharge even
in low pressure applications.
Current models (ending in “A”) use a P1620 charging valve.
Previous models (not ending in “A”) use a V10N charging valve.
Other features and specifi cations are the same for both versions.
5.0 INSTALLATION
5.1 Mounting
1. Mount accumulators between the system hydraulic pump
and the working components (i.e. cylinders, clamps,
etc.). Standard “U” bolts can be used for mounting. The
accumulators are self-supporting using connector fi ttings
that are no smaller than the hydraulic port size. If reducer
fi ttings are used, an external bracket around the accumulator
body is recommended.
CAUTION: Use care when tightening the mounting
brackets so that the outer shell of the accumulator is
not damaged or distorted.
CAUTION: Mounting devices must not cover the entire
shell or diaphragm, thereby restricting normal thermal
expansion due to temperature variations.
Note: Fitting FZ2028 is a low profi le #6 SAE union designed for
mounting the ACL201 or ACL201A accumulator directly onto bar
manifolds. Fitting FZ2029 adapts up to a #8 SAE size to allow
mounting of the ACL201 or ACL201A accumulator directly onto
the AP500 Coupler Package or AW67 hex manifold.
2. The accumulator may be mounted in any position, provided
that the oil line and the charging valve are accessible.
3. Install a shut-off valve in the oil line between the accumulator
and the system components to close the oil line from the
accumulator, preventing uncontrolled fl uid fl ow.