EHV/EHVF
Bladder Accumulators
OLAER EHV/EHVF | High pressure bladder type conforming to EC regulations
The Professional Choice
Increasing the safety of your systems !
The accumulators installed in energy storage make your systems safe in case of failure to one of the components.
Examples :
• Emergency braking of special vehicles
• Pitching the blades on wind turbines
Preserving the environment !
• By using renewable energy : The transformation of wave energy into electricity is done via storing hydraulic
energy in high and low pressure accumulators.
• By recovering the energy from the braking vehicle : The energy stored allows restarting the vehicle, thus
lowering its fuel consumption.
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Increasing the production capacity !
The installation of accumulators on the hydro-electric power station allows reduced pump power, thus lowering the
electric consumption.
Lowering production costs !
Without changing the installed power, the installation of accumulators on a production machine can allow an increased
frequency, for example, by accelerating the movement of displacement without hydraulic press stress.
OLAER | EHV/EHVF 3
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P
2
2
V
C
P
1
1
V
B
P
0
0
V
A
V
V0 = Nitrogen capacity of the
accumulator
V1 = Gas volume at the minimum
hydraulic pressure
V2 = Gas volume at the maximum
hydraulic pressure
V = Returned and/or stored
volume between P1 and P2
P0 = Initial preload of the
accumulator
P1 = Gas pressure at the minimum
hydraulic pressure
P2 = Gas pressure at the maximum
hydraulic pressure
A - Bladder in the precharge position,
which means that it is only filled
with nitrogen. The anti-extrusion
system closes the hydraulic orifice
and prevents the destruction of
the bladder.
Maximum pressure differential : 4:1
B - Position at the minimum
operating pressure ; there must be a
certain amount of fluid between the
bladder and the hydraulic orifice,
such that the anti-extrusion system
does not close the hydraulic orifice.
Thus, P0 must always be < P1.
C - Position at the maximum
operating pressure. The volume dif-
ference
V between the minimum
and maximum positions of the
operating pressures represents the
working fluid quantity.
Operating principle
Operation of the OLAER gas loaded bladder accumulator is based on the considerable difference in compressibility
between a gas and a liquid, enabling a large quantity of energy to be stored in an extremely compact form. This
enables a liquid under pressure to be accumulated, stored and recovered at any time.
Its special design allows the bladder (the strategic component) to compress the gas and usually form into three lobes
in order for the accumulator to store, then to deliver the fluid under pressure, as required.
Your Benefits
• To increase your production rates thanks to large
instantaneous flow rates that only accumulators
can provide.
• Some spare power available at any time.
Example : EHV 50-330/90
Average flow : 650 L/min
Maximum pressure available: 320 Bar
Minimum pressure available: 250 Bar
Average power = Average flow x
Average pressure/600 = 308 kW
• The accumulator’s ability to run independently
reduces the installation cost while reducing your
equipment running cost.
• With an accumulator in compliance with
the European standard, your OLAER accumulator is
suitable for use in more than 35 countries making it
boundary friendly.
Technical Characteristics
The accumulator comprises a forged steel shell, a
rubber bladder and a fluid port assembly.
• Shell material options include alloyed steel,
stainless steel, aluminium, titanium and
composites.
• Various bladder materials available which are
compatible with a range of fluids and temperatures.
• Anti-extrusion system; fluidport assembly for
high pressure.
Taking into account the different needs of various
applications, Olaer offers different protections external
and/or internal: Bare metal, nickel plating, epoxy paint,
PTFE, Rilsan® and phenolic coating.
This extensive range enables us to offer accumulators
operating from – 50 to +150°C with pressures of up to
690 Bar and capacities of up to 57 litres.
As the market leader in bladder type accumulators,
Olaer has participated in the development of the
EN 14359:2006 standard, which specifies the material,
design, manufacturing, tests, safety devices and
documentation (including the instruction manual),
for pressure accumulators and gas bottles for
hydraulic applications.
Main Features
OLAER | EHV/EHVF 5
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Accumulator size in litre
AL
C
stored volume
How to size?
Basic sizing chart for acccumulator used in energy storage.
Olaer has developed very sophisticated simulation
software to optimize accumulator sizing recom-
mendations. The behaviour of accumulators used
in applications such as pulsation dampening, surge
alleviation, thermal expansion and energy storage
can be simulated. Our software is
available on CD-Rom and can be
downloaded from our website. You
may also contact your local Olaer
office for sizing assistance.
The above graph is useful to estimate the size of an
accumulator used to store or deliver a specific volume
of liquid within a given pressure range. These curves
are the graphic representation of an adiabatic
*
cycle
(fast cycling rate - N = 1.4 perfect gas assumption) or
isothermal
*
cycle for an accumulator working at 20°C
with a precharge P0 = 0,9 P1.
They do not take into consideration the real gas
compression correction factor, the real adiabatic
coefficient and the polytropic rate of the application.
Depending on the application data, the influence of
these factors may be significant, and require that some
calculations adjustments be made. The Olaer simulation
software takes all these factors into account.
Sizing of an accumulator to be installed in the
following example conditions:
P2 : Maximum available pressure : 210 Bar
P1 : Minimum working pressure : 100 Bar
P0 : Nitrogen precharge : 90 Bar
V : Volume to be stored : 14L
Condition : Isothermal (No temperature variation)
A/Compression ration = P2/P1 = 210/100 = 2,1
B/From the value 2,1 on the axis, draw a vertical
line that intersects the isothermal reference curve in A.
C/From the value 14 on the V axis, draw a vertical
line. The intersection point of this line with the
horizontal line meeting A indicates a required
accumulator size of 32 L.
Calculation of the volume drawn off from
an accumulator.
Accumulator size = 12 L
P2 = 185 Bar; P1 = 100 Bar;
P0 = 90 Bar; Adiabatic condition
= P2/P1 = 185/100 = 1,85
V : 3,5 litres
*Reminder
Isothermal: The transformation is said to be
isothermal when the compression or expansion of
the gas occurs at a rate slow enough to allow a
good thermal exchange, allowing the gas to remain
at constant temperature.
Adiabatic: The transformation is said to be
adiabatic when the cycle is quick and does
not allow a temperature exchange with the
ambient media.
Technical Characteristics
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EHV RANGE FROM 0.2 TO 10 LITRES
Range 350 bar
Type
Effective Gas
vol. Litres
Work pressure
bar
Max Flow
Rate lt/min
Max Weight
in Kg
Clamps x
(quantity)
O-ring
+ anti-extrusion ring
Support
bracket
Fixation
assenbly
Dimensions in mm
A
max
height
B C øD
max
ød øE F
connection
SW
1
on
flats
EHV 0,2 - 350/90 0.17 350 120 2.1
A 56x1
consult
page
11
- - 266 38 29 58 16 38 G ½“ 24
EHV 0,5 - 350/90 0.60 350 240 2.5
E 95x1
- - 258 54 28 91 16 50 G ¾” 32
EHV 1 - 350/90 1 350 240 6
E 114x1
CE 89 EF4 328 54 66 115 22.5 50 G ¾” 32
EHV 1,6 - 350/90 1.6 350 240 8
E 114x1
CE 89 EF4 396 54 27 115 16 50 G ¾” 32
EHV 2,5 - 350/90 2.4 350 450 11
E 114x2
CE 89 EF4 548 66 66 115 22.5 68 G 1 ¼” 50
EHV 4 - 350/90 3.7 350 450 15
E 168x1
CE 108 EF1 433 65 66 170 22.5 68 G 1 ¼” 50
EHV 5 - 350/90 5 350 450 19
E 114x2
CE 89 EF4 897 66 66 115 22.5 68 G 1 ¼” 50
EHV 6 - 350/90 6 350 450 20
E 168x1
CE 108 EF1 559 65 66 170 22.5 68 G 1 ¼” 50
EHV 10 - 350/90 10 350 450 31
E 168x2
CE 108 EF1 824 65 66 170 22.5 68 G 1 ¼” 50
Type
Effective Gas
vol. Litres
Work pressure
bar
Max Flow
Rate lt/min
Max Weight
in Kg
Clamps x
(quantity)
O-ring
+ anti-extrusion ring
Support
bracket
Fixation
assenbly
Dimensions in mm
A
max
height
B C øD
max
ød øE F
connection*
SW
1
on
flats
EHV 1 - 690/90 1.1 690 360 8,6
E 114x1
consult
page
11
CE 89 EF4 376 68 69 122 22.5 68 G 1“ 45
EHV 2,5 - 690/90 2.4 690 360 15
E 114x2
CE 89 EF4 551 68 69 122 22.5 68 G 1” 45
EHV 5 - 690/90 5 690 360 29
E 114x2
CE 89 EF4 900 68 69 122 22.5 68 G 1” 45
Range 690 bar
Fittings & rings page 11
Above dimensions are in mm and are subject to manufacturing tolerances.
* Requires a special adapter
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Type
Effective Gas
vol. Litres
Work pressure
bar
Max Flow
Rate lt/min
Max Weight
in Kg
Clamps x
(quantity)
O-ring
+ anti-extrusion ring
Support
bracket
Fixation
assenbly
Dimensions in mm
A
max
height
B C
øD
max
ød
øE F
connection
SW
1
on
flats
EHV 10 - 330/90 9.2 330 900 39
D 226x2
consult
page
11
CE 159A
EF2 585 103 66 226 22.5 101 G 2“ 70
EHV 12 - 330/90 11 330 900 48
D 226x2
CE 159A
EF2 685 103 66 226 22.5 101 G 2” 70
EHV 20 - 330/90 17.8 330 900 63
D 226x2
CE 159A
EF2 895 103 66 226 22.5 101 G 2” 70
EHV 24.5 - 330/90 22.5 330 900 74
D 226x2
CE 159A
EF2 1030 103 66 226 22.5 101 G 2” 70
EHV 32 - 330/90 32 330 900 103
D 226x2
CE 159A
EF3 1420 103 66 226 22.5 101 G 2” 70
EHV 50 - 330/90 48.5 330 900 142
D 226x2
CE 159A
EF3 1934 103 66 226 22.5 101 G 2” 70
EHV RANGE FROM 10 TO 50 LITRES
Range 330 bar
Type
Effective Gas
vol. Litres
Work pressure
bar
Max Flow
Rate lt/min
Max Weight
in Kg
Clamps x
(quantity)
O-ring
+ anti-extrusion ring
Support
bracket
Fixation
assenbly
Dimensions in mm
A
max
height
B C
øD
max
ød
øE F
connection
SW
1
on
flats
EHV 10 - 480/90 9.2 480 900 40
D 226x2
consult
page
11
CE 159A
EF2 592 103 74 228 22.5 101 G 2“ 70
EHV 12 - 480/90 11 480 900 48
D 226x2
CE 159A
EF2 692 103 74 228 22.5 101 G 2” 70
EHV 20 - 480/90 17.8 480 900 66
D 226x2
CE 159A
EF2 902 103 74 228 22.5 101 G 2” 70
EHV 32 - 480/90 32 480 900 109
D 226x2
CE 159A
EF3 1427 103 74 228 22.5 101 G 2” 70
EHV 50 - 480/90 48.5 480 900 150
D 226x2
CE 159A
EF3 1965 103 97 228 50.8 101 G 2” 70
Range 480 bar
Type
Effective Gas
vol. Litres
Work pressure
bar
Max Flow
Rate lt/min
Clamps x
(quantity)
O-ring
+ anti-extrusion ring
Support
bracket
Dimensions in mm
A
max
height
B C
included
ring
øD
max
ød øE F
connection *
SW
1
on
flats
EHV 12 - 690/90
11 690 900
11060x2
consult
page
11
11061 755 100 169 262 50 110 2“ 77
EHV 20 - 690/90
16.5 690 900
11060x2
11061 965 100 169 262 50 110 2” 77
EHV 37 - 690/90
33.4 690 900
11060x2
11061 1490 100 169 262 50 110 2” 77
EHV 54 - 690/90
48 690 900 11060x2 11061 2004 100 169 262 50 110 2” 77
Range 690 bar
C
Above dimensions are in mm and are subject to manufacturing tolerances.
* Requires a special adapter
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Technical Characteristics
Type
Effective Gas
vol. Litres
Work pressure
bar
Max Flow
Rate lt/min
Max Weight
in Kg
Clamps x
(quantity)
Connection
(norme NFE 48055)
Support
bracket
Fixation
assenbly
Kit of flange
(page 11)
Dimensions in mm
A
max
height
B C øD
max
ød øE øF SW
1
on
flats
øL M
EHVF 2,5 - 350/90 2.4 350 450 11
E 114x2
PN
400DN
25 or
1” SAE
6000
PSI
CE 89 EF4
BR 400-25
593 111 66 115 22.5 68 22 50 47.9 9.5
EHVF 4 - 350/90 3.7 350 450 15
E 168x2
CE 108 EF1
BR 400-25
478 110 66 170 22.5 68 22 50 47.9 9.5
EHVF 5 - 350/90 5 350 450 19
E 114x2
CE 89 EF4
BR 400-25
942 111 66 115 22.5 68 22 50 47.9 9.5
EHVF 6 - 350/90 6 350 450 20
E 168x2
CE 108 EF1
BR 400-25
604 110 66 170 22.5 68 22 50 47.9 9.5
EHVF 10 - 350/90 10 350 450 31
E 168x2
CE 108 EF1
BR 400-25
869 110 66 170 22.5 68 22 50 47.9 9.5
EHVF RANGE FROM 2.5 TO 10 LITRES FLANGED
Range 350 bar
Above dimensions are in mm and are subject to manufacturing tolerances.
Flanges page 11
OLAER | EHV/EHVF 9
Type
Effective Gas
vol. Litres
Work pressure
bar
Max Flow
Rate lt/min
Max Weight
in Kg
Clamps x
(quantity)
Connection
(norme NFE 48055)
Support
bracket
Fixation
assenbly
Kit of flange
(page 11)
Dimensions in mm
A
max
height
B C øD
max
ød øE øF SW
1
on
flats
øL M
EHVF 10 - 250/90 9.2 250 900 39
D 226x2
PN 250DN
51 or 2”
SAE
3000
PSI
CE 159A
EF2
BR 250-51
600 118 66 226 22.5 101 47 70 71.4 9.5
EHVF 12 - 250/90 11 250 900 48
D 226x2
CE 159A
EF2
BR 250-51
700 118 66 226 22.5 101 47 70 71.4 9.5
EHVF 20 - 250/90 17.8 250 900 63
D 226x2
CE 159A
EF2
BR 250-51
910 118 66 226 22.5 101 47 70 71.4 9.5
EHVF 24.5 - 250/90 22.5 250 900 74
D 226x2
CE 159A
EF2
BR 250-51
1045 118 66 226 22.5 101 47 70 71.4 9.5
EHVF 32 - 250/90 32 250 900 103
D 226x2
CE 159A
EF3
BR 250-51
1435 118 66 226 22.5 101 47 70 71.4 9.5
EHVF 50 - 250/90 48.5 250 900 142
D 226x2
CE 159A
EF3
BR 250-51
1949 118 66 226 22.5 101 47 70 71.4 9.5
EHVF RANGE FROM 10 TO 50 LITRES FLANGED
Range 250 bar
Type
Effective Gas
vol. Litres
Work pressure
bar
Max Flow
Rate lt/min
Max Weight
in Kg
Clamps x
(quantity)
Connection
(norme NFE 48055)
Support
bracket
Fixation
assenbly
Kit of flange
(page 11)
Dimensions in mm
A
max
height
B C øD
max
ød øE øF SW
1
on
flats
øL M
EHVF 10 - 330/90 9.2 330 900 39
D 226x2
PN 400DN 38
or 1 ½” SAE
6000
PSI
CE 159A
EF2
BR 400-38
625 143 66 226 22.5 101 34 70 63.8 12.5
EHVF 12 - 330/90 11 330 900 48
D 226x2
CE 159A
EF2
BR 400-38
725 143 66 226 22.5 101 34 70 63.8 12.5
EHVF 20 - 330/90 17.8 330 900 63
D 226x2
CE 159A
EF2
BR 400-38
935 143 66 226 22.5 101 34 70 63.8 12.5
EHVF 24.5 - 330/90 22.5 330 900 74
D 226x2
CE 159A
EF2
BR 400-38
1070 143 66 226 22.5 101 34 70 63.8 12.5
EHVF 32 - 330/90 32 330 900 103
D 226x2
CE 159A
EF3
BR 400-38
1460 143 66 226 22.5 101 34 70 63.8 12.5
EHVF 50 - 330/90 48.5 330 900 142
D 226x2
CE 159A
EF3
BR 400-38
1974 143 66 226 22.5 101 34 70 63.8 12.5
Range 330 bar
Above dimensions are in mm and are subject to manufacturing tolerances.
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Accessories
CLAMPS
SUPPORT BRACKETS
F
View following F
Shape A
F
View following F
Shape B
Type Shape A B C H I J K L M N R S Weight
CE 89 A 89 101 125 73 140 75 13 25 60 75 130 - 0.8
CE 108 A 108 120 150 92 175 95 17 25 80 160 210 - 1.5
CE 159A B 159 170 200 123 235 115 17 25 100 200 260 40 2.5
CE 11061 B - - - 137 250 206 17 45 191 108 216 111 6
Above dimensions are in mm and are subject to manufacturing tolerances.
Shape F
Shape EShape D
E
I
A
C
D
B
Tightening Tightening
Type Form
Recom-
mended
min/max
diameter
Dimensions in mm Recom-
mended
tightening
torque N.m.
A B
C
D E F G H I J K
Min Max
A 56 E 54/56 92 102 36 36 3 37 M10x80 3 31 14 9 134 7
E 95 E 87/97 88 140 61.5 66.5 1.5 28 M8x75 3 40 35 9 155 7
E 114 E 112/124 88 140 73 78 1.5 28 M8x75 3 40 35 9 155 7
E 168 E 166/176 137 189 92 96 1.7 30 M10x80 3 45 35 9 210 10.5
D226 D 219/226 210 222 119 122.5 3 35 M12x80 3 40 21 15 270 11
F260 F 260 260 195 263 - 260 295 - - - - - 295 -
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FITTINGS EHV
Above dimensions are in mm and are subject to manufacturing tolerances.
Accumulator model Connection of
accumulator
ø F gas cyl.
Connection
of fitting
ø I gas cyl.
Shape J/Flats K O-Ring & Back-up ring
EHV 0.5 & 1 & 1.6 Liters 350 Bar 3/4” 3/8”
Blind
A
A
-
32
8 O-Ring 21.3 x 2.4
EHV 2.5 to 10 Liters 350 Bar 1 1/4“ 3/4”
Blind
A
A 50
10 O-Ring 36.2 x 3
EHV 0.2 Liter 350 Bar 1/2” 1/4”
Blind
A
A 27
8 O-Ring 18 x 2
EHV 1 to 5 Liters 690 Bar 1” 1/2”
Blind
B
B 41
10 O-Ring 21.3 x 3.6
BU R 22 x 28 x 2.69*2
EHV 10 to 50 Liters 330/480 Bar 2” 1”
Blind
A
A 65
13 O-Ring 54 x 3
EHV 10 to 50 Liters 690 Bar 2” 1”
Blind
B
B 65
15 O-Ring 43.82 X 5.33
BU R 45 x 54 x 0.85
These accessories are designed to perfectly fit OLAER accumulators. They meet the latest regulations and are compliant with the CETOP standard.
Type A B C D F ø G ø H L M
BR 250-51 102 97 16 42.9 77.75 56.74 3.53 35 M14
BR 400-25 81 70 24 27.75 57.15 32.92 3.53 40 M12
BR 400-38 113 95 30 36.5 79.4 47.22 3.53 50 M16
FLANGES KITS EHVF
Shape A - Seal in angle
Threaded Blind
Shape B - Seal in piston
Threaded Blind
FIXATION MOUNTING FRAMES
Type A B C D E F G H J
EF1 670 570 225 92 96 340 370 270 50
EF2 670 570 285 123 115 340 370 270 50
EF3 1405 1300 285 123 115 340 370 270 55
EF4 750 600 190 73 85 208 238 138 50
Installed accumulator rack
Olaer design and manufactures modulable compact assemblies. For any request,
please refer to Olaer technical services.
L 40x50x5
12 OLAER | EHV/EHVF
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Accessories
The standard set is delivered in a storage case containing the following:
• VG3 tester and pressurizer
• Pressure gauge kit from 0 to 250 bar
• 3 connection adapters for inflation valves (7/8”-14 UNF/5/8”-18 UNF/8 V1)
• High pressure hose, 2 m long, for connecting to a nitrogen source. The flexible tube is fitted with a female
connector at both ends (60° BSP 1/4’’ connector for connection to the pressurizing port and connector dia 21,7
x 1,814 SI) with gasket for connection to a pressure source (commercial nitrogen cylinder, portable nitrogen
station, superpressurizer, etc.).
Note:
The following options are available on request: Pressure gauge kits with different scale divisions. Scale divisions 0-6,
0-10, 0-60, 0-100, 0-160, 0-250, 0-400.
High pressure hose TS2 for maximum pressure 400 Bar.
Ordering code - Example: VG3 250 1 TS2 1
250 = Gauges, possible choice between pressure ranges
6/10/25/60/100/160/250/400
TS2 = Flexible hose for maximum working pressure 400 Bar
Charging sets are used to inflate, check, top-up or vent the nitrogen gas precharge in all accumulators. They are to
be screwed to the gas valve or bladder stem and connected to the gas regulator that fits the Nitrogen bottles. They
are supplied in a plastic case.
The standard set is delivered in a storage case containing the following:
VGU universal tester and pressurizer (end M28x1.50)
• Pressure gauge kit from 0 to 25 bar
• Pressure gauge kit from 0 to 250 bar
• Connection adapters for inflation valves (7/8’’ – 5/8’’ – 8V1 - M28x1.50)
• High pressure hose, 2.5 m long, for connecting to a nitrogen source
• Hexagon socket screw key 6mm
• Seal Kit
• Operating instruction in French, English, German
Note:
The following options are available on request: Pressure gauge kits with different scale divisions: 63mm with glycerol
filled back end G1/4’’ cyl. equiped with coupling for Minimess connection. Scale divisions 0-10, 0-60, 0-100, 0-400,
with accuracy class 1.6%.
High pressure hose of different length with adapters for nitrogen bottles from various countries (specify country), at
each end with a female swivel coupling G1/4’’ for connecting to the inflation port
Ordering code - Example: VGU/F 25/250 7 TS2 3
25/250 = Gauges, possible choice between pressure ranges 6/10/25/60/100/160/250/400
MODEL VG3
For OLAER accumulators.
MODEL VGU
Universal charging set fits most of the hydraulic accumulators available on the market.
Maximum working pressure: limited by the maximum operating pressure of the installed
pressure limited to 400 bar in any case.
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Are designed to incorporate in a single compact block a
variety of functions necessary for the correct operation of a
hydraulic system fitted with accumulators. This includes manual
and/or electrical drain, isolation, flow control and pressure relief.
Channel cross section : 10 mm (DI 10 block), 16 mm (DI 16 block),
20 mm (DI 20 block), 24 mm (DI 24 block), 32 mm (DI 32 block).
Maximum working pressure : 330 to 690 Bar depending on models.
According with the fluids of group 2 (PED). Options for ATEX
compliant blocks construction carbon steel or stainless steel.
A specific data sheet is available on request, please contact OLAER.
SAFETY BLOCKS
How to order?
Fluid Working Temperature °C* Construction
Mineral oils -15 + 80 01125*
Water 0 + 50 01025
Water 0 + 80 01225
Ester phosphate - 15 + 80 01140
Other fluids Other temperatures Please contact Olaer
Accumulator Range
in liters
in Bar
Volume
Maximum working pressure
EHV 50 - 330/90 01125 Po=90b G1” cyl.
EHV : European High pressure bladder
EHVF : European High pressure bladder Flanged
90 : regulation EC
Regulation code
to be specified as per following recommendations table
Construction
ORDERING AN ACCUMULATOR
Nitrogen gas precharge
in Bar at 20 °C (please refer to the predetermination curves table on
page 5 or consult OLAER technical departments)
Adaptor to be specified
blind: with blank adaptor or without adaptor (refer to dimension I in
table on page 11 and specify reduction size).
ORDERING AN ACCUMULATOR
Please indicate type for accessories as per tables on page 6 to 9, and for peripheral materials as per table on
pages 10 and 11.
* standard construction
IT IS STRICTLY FORBIDDEN TO
• Weld, screw or rivet anything onto the
accumulator body.
• Operate in any way that may alter the mechanical
properties of the accumulator.
• Use the accumulator for construction purposes.
(No stress or loading)
• To modify the accumulator without prior approval
from the manufacturer.
GAS FILLING
For safety reasons, use only pure nitrogen, minimum
99.8% volume. In most of the cases the pre-charge
pressure is between 0,9 P1 and 0,25 P2. Your local Olaer
office can calculate the correct pre-charge pressure for
your application. Olaer offers a range of devices for
checking nitrogen pressure as well as pre-charging
accumulators. Please note that various adaptors are
required to interface with different accumulator filling
valves and nitrogen (N2) cylinder connections throughout
the world.
The part number defines the accumulator and the material
construction. Information contained on the labeling/
manufacturer’s plate:
• Olaer logo
• Product description
• Date or year of manufacture
• Reference information of the accumulator
• Allowable temperature range of the accumulator
Additional information on certain models:
• Warning messages and safety instructions
(“Danger”, ”Use nitrogen only” or similar message)
• Maximum inflation pressure P0 max in bar
• Allowable pressure amplitude P max in bar
• Fluid group (1 or 2 according to the Directive
97/23/EC)
• Total dry mass in kilogram
Maximum allowable operating pressure
The maximum pressure (PS) is indicated on the
accumulator. Check that the maximum allowable
pressure is greater than that of the hydraulic system.
For any other pressure, you will have to contact Olaer.
Maximum allowable operating temperature
The temperature range (TS) is indicated on the
accumulator. Check that the allowable temperature
range covers the operating temperatures (environment
and hydraulic fluid temperatures). For any other
temperature, you will have to contact Olaer.
Maintenance
Any intervention, maintenance, repair must be carried
out by a qualified and trained personnel.
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14
OLAER | EHV/EHVF
Installation
(1)
For accumulators 10 to 50 liters before May 2009
* These parts are supplied as a kit with instructions.
Item Spare parts
1 Bladder kit
2* Bladder assembly
3* Gas valve assembly
4 Gas valve cap
5 Fluid port assembly
6* Anti extrusion ring
7* Drain plug with seal
(1)
8* Seal kit
HOW TO ORDER THE BLADDER KIT
Example: For an accumulator EHV 50-330/90 01125
KIT EHV 50-330/90 01125
Position: Preferably vertical (liquid connection downwards) to horizontal, depending upon application. If the
accumulator is installed in any position other that vertical with fluid port down, contact Olaer. The accumulator could
have reduced volumetric efficiency and Olaer can help you to take these factors into account.
Mounting: A 200mm clearance is required above the accumulator to allow for gas charging. Each accumulator is
delivered with a user instructions leaflet. Ensure that the pipes connected directly or indirectly to the accumulator are
not subjected to any abnormal force, Ensure that the accumulator cannot move, or minimize any movement that may
occur as a result of broken connections. Olaer clamps and brackets are designed for this purpose (and can be supplied
as optional extras). The accumulator must not subjected to any stress or load, in particular from the structure with
which it is associated. Contact Olaer in case of mounting on the movable structures.
The Professional Choice
OLAER | EHV/EHVF 15
EC Regulation
HOW TO ORDER THE BLADDER KIT
Example: For an accumulator EHV 50-330/90 01125
KIT EHV 50-330/90 01125
The Regulation 97/23/CE
has been applicable since 29/11/99 on
a volontary base, and has been mandatory
since 29/05/2002.
EC type accumulators are
delivered with instructions for
operation and a
declaration of conformity.
Olaer designs and
manufactures hydro-pneumatic
accumulators for use in all
countries and which comply with
national regulations in force as
ASME / selo...
WHAT YOU NEED TO KNOW
Directive 97/23/ EC is applicable from 29-11-
1999 and mandatory from 29-05-2002.
Decree 99-1046, which applies to new
machinery and the ministerial order of 15-03-
2000, which applies to the operation of all
machinery, transposed the directive into French
domestic legislation.
• Free movement of machinery within the
European Union.
• Group 2 fluid accumulators whose V ≤ 1 L
and PS ≤ 1000 bar are not entitled to stamp
EC marking.
• The EC marking should be accompanied
by the identification number of the
notified authority.
The Professional Choice
www.olaer.com
- in Fluid Energy Management
Global perspective
and local entrepreneurial flair
Olaer is a global player specialising in innovative,
efficient system solutions for temperature optimisation
and energy storage. Olaer develops, manufactures and
markets products and systems for a number of different
sectors, e.g. the aircraft, engineering, steel and
mining industries, as well as for sectors such as oil and
gas, contracting and transport, farming and forestry,
renewable energy, etc.
All over the world, our products operate in the most
diverse environments and applications. One constantly
repeated demand in the market is for optimal energy
storage and temperature optimisation. We work at a
local level with a whole world as our workplace – local
entrepreneurial flair and a global perspective go hand
in hand.
Our local presence, long experience and a wealth of
knowledge combine with our cutting-edge expertise
to give you the best possible conditions for making a
professional choice.
Copyright © December 2010 OLAER - The information in this brochure is subject to change without prior notice.
