EPE AS Series User manual

Specifications
Material of Construction
Body : Carbon Steel / Stainless Steel.
Bladder : Nitrile(NBR) / Butyl (IIR) /
Viton (FKM) / EPDM ....
others listed on ordering code.
Connections
Gas Side : 5/8” UNF / 1/4” BSP /
5/16” UNEF/Vg8 / 7/8” UNF.
Others on request.
Fluid Side : Female Threaded or
Flanged. Others on request.
Paint-CS Accumulators : Externally painted in RAL-5010.
Others on request.
Technical Data
Design : Seamless / Fabricated shell.
Max. Pressure (PS) : 16-360 Bar.
Test Pressure (PT) : 1.43 x PS
Temperature range : -20°C to +80°C (Standard)
Allowable pre.ratio (P /P ) : 4:1
2 0
Nominal capacity : 0.2 to 575 Ltrs.
Max. Flow rates : Refer page 6.
Fluid
Fluid Viscosity range : 10 to 400 cSt
Recommended viscosity : 32 cSt
Fluid contamination degree: Class 21/19/16
according to ISO 4406:1999
or better on request.
Description
A hydro-pneumatic accumulator is a device used
specifically for storage of liquid under pressure. As liquids,
for all practical purposes, are incompressible, this objective
is achieved by utilizing the compressibility of gases.
A flexible rubber separator i.e., bladder is fitted into the
accumulator shell.
An inert gas - nitrogen - is filled into the bladder through a
pressure valve to a pressure P . The bladder expands, filling
0
the entire volume V of the accumulator shell.
0
When the system pressure P is higher than the gas
1
precharge pressure P , the liquid enters the accumulator
0
and the bladder is compressed reducing the gas volume to
V .
1
Should the liquid pressure rise to P , the volume of gas
2
reduces to V with an attendant rise in pressure, thus
2
balancing the Liquid pressure.
A potential energy is now stored in the accumulator to be
utilised whenever needed.
Certification
The EPE bladder accumulators are generally designed &
manufactured according to European directive. They can
also be supplied as per ASME or others on request.
Materials
In standard version, the shell is made of carbon steel and
painted on the outside with a coat of rust inhibitor; the
valves are made from carbon steel - phosphated. This
configuration is suitable for oils and non-corrosive liquids.
Options for shell in stainless steel / aluminium / titanium
alloy are available on request.
Shells Nickle plated / Rilsan coated or others are also
available on request.
Hydraulic Symbol
1
Bladder Accumulator
Type : AS
Technical specifications subject to change.

Operation
Sequence of operations in the accumulator working cycle
A) General appearance in assembled condition.
B) Bladder occupying the entire space inside the shell
after precharge.
C&D) The accumulator in working condition between
minimum pressure (C) & maximum pressure (D)
delivers fluid and calculated between V & V i.e.,
1 2
∆V = V - V
1 2.
Accumulator now has a potential energy to be utilised as
desired.
Construction
The EPE bladder accumulator, generally designed &
manufactured according to European directive, comprises
a steel shell in which is fitted a bladder complete with a gas
valve and a fluid port with the poppet valve (Fig.2)
The accumulator shell is a pressure vessel forged or
fabricated from high grade steel designed and
manufactured to meet relevant international standards.
For special applications various surface coatings are
available as well as stainless steel construction.
The bladder construction which is unique to EPE is
moulded in a single piece thus obviating problems
associated with seamed construction. The gas valve is
fitted in such a manner which allows it to be connected
easily and safely. In addition the valve, not an integral part
of the bladder, can be re-used, thus reducing maintenance
costs.
Bladders are normally manufactured from nitrile, but for
special applications butyl, neoprene, ethylene-propylene
etc, are available.
The gas valve is connected to the bladder by a rubber
coated washer to ensure a gas tight joint and a non return
valve is incorporated for bladder inflation. The bladder,
complete with the gas valve is attached to the accumulator
shell by a lock nut, and the assembly is protected by a
cover.
Standard accumulators (types - AS / ASHF / ASWP) are installed with a poppet valve to prevent bladder from extruding out
of the fluid port while allowing fluid to flow. In low-pressure range (type-ASWD/ASLV/ASLVHF) the anti-extrusion valve is
installed.
Fig.2
Gas Valve
Accumulator
Shell
Bladder
Poppet Valve
Bleed
Fluid Port
P . V P . V P . V
0 0 1 1 2 2
Fig.1
A B C D
General
2

The choice of the elastomer used for the bladder depends on the liquid to be used and on the operating temperatures
(and at times, storage). In the chart below, each polymer has a designated letter to be used in the ordering code.
Code
letter
E
Polymer ISO
EPDM
Temperature
range (°C)
-20 +90to
Some of the liquids compatible with the polymer
N CR -20 +85to
V FKM -20 +121to
Break fluids, hot water, leaching fluids, detergents, water-glycol
(HFC), many acids and bases, saline solutions, skydrol 500, etc.
Freon (12-21-22-113-114-115), water and aqueous solutions,
ammonia, carbon dioxide, mineral, paraffin and silicon oils.
The same as with standard nitrile but with excellent performance at
both high and low temperatures.
P NBR -20 +85to
F NBR -40 +70to
H NBR -10 +90to
Mineral, vegetable, silicon and lubricating oils, industrial water,
glycols, non-flammable liquids (HFA-HFB-HFC), aliphatic
hydrocarbons, butane, diesel oil, kerosene, fuel oils etc.
The same as with standard nitrile + a number of different types
of Freon. (This contains less acrylonitrile than the standard and is
therefore more suitable for low temperatures, but is chemical
resistance is slightly lower.
The same as with standard nitrile + regular and premium grade
slightly aromatic gasoline.
K HNBR -50 +130to
A NBR -20 +85to
B IIR -20 +90to
The same as with standard nitrile but with excellent performance
at both high and low temperatures.
Foods (specify which type when ordering).
Phosphoric esters (HFD-R), phosphate esters, fyrquel, hot water,
ammonia, caustic soda, some kinds of Freon (22-31-502), glycol-
based brake fluids, some acids, alcohols, ketones, esters, skydrol
7000, etc.
Y ECO -30 +1 0to 0
Lead-free gasoline, mineral oils.
Nitrile (Buna-N
/ Perbunan)
Ethylene-
Propylene
Low Temperature
Nitrile
For food-stuffs
Butyl
Nittrile for
Hydrocarbons
Chloroprene
(Neoprene)
Epichloridrin
Viton
(Flouroelastomer)
Hydrogenated
Nitrile
The precharge pressure P - In most cases the values
0
recomended in Gas Precharge Pressure - page-3 are valid
although, as the pressure and, above all, the velocity of the
yield required increase, there is the danger that in each
cycle the bladder will knock against the poppet valve. In
these cases it is possible to use P = 0.8 to 0.7 P .
0 1
The P /P ratio - Any increase in this, will increase the
2 0
stress the bladder is subjected to in each cycle.
The maximum operating pressure P - Any increase in
2
this will subject the bladder to greater stress.
Flow rate - Flow rate does not affect bladder working life if
values given in Table.2 are not exceeded. When
approaching the maximum values, make sure there
remains a residual volume of liquid > 10% of the volume V
0
in the accumulator, in both loading & unloading conditions.
The frequency or number of cycles per day.
Installation - The vertical position with gas valve on top is
the recommended arrangement. When the position is
horizontal the bladder tends to rest and rub against the
accumulator body. This could result in quicker wear.
The operating temperature - This is one of the factors
which most affects the life of the bladder: at very low
temperatures the bladder tends to become brittle; as the
temperature rises, reaching, or going beyond the limits for
the elastomer, the stress the bladder is subjected to
increases exponentially, which can lead to fracturing within
a short time.
It should be remembered that the temperature in the
accumulator is in many cases higher than the one of the
system, and that it rises with each increase of P , of P /P ,
2 2 1
and with the volume of the accumulator (in other words,
larger the accumulator, lesser is the capacity to dissipate
heat).
Durability of the Bladders
It is essential, in order to make the correct choice, to take into consideration the working conditions that the bladder will be
operating in, because these can considerably affect the durability of the bladder. Assuming that the liquid used is clean
and compatible with the bladder material, there are a number of factors which can affect the life of the bladder:
Material
Bladder - Material | Durability
* Check availability before ordering.
3

4
Ordering Code - Accumulators
1Series
= AS
= ASHF
= ASWP
= ASWD (P0 ≤ 15 bar)
= ASLV
= ASLVHF
= ASL
= AST
Standard Accumulator - Seamless Shell
High-Flow Accumulator - Seamless Shell
Welded Accumulator - Poppet Design
Welded Accumulator - Disc Design
Large Volume Accumulator
High Flow Large Volume Accumulator
Liquid Separator Accumulator
Transfert Accumulator
3Bladder & Seal
material
Nitrile (NBR)
Butyl (IIR)
Viton (FKM)
Ethylene-Propylene (EPDM)
Hydrogeneted Nitrile (HNBR)
Neoprene (CR)
Nitrile for Hydrocarbons
Low Temp. Nitrile
Epichlorohydrin (ECO)
For Food
= P (standard)
= B
= V
= E
= K
= N
= H
= F
= Y
= A
5Shell material
Carbon Steel
Nickel Coated Carbon Steel
Stainless Steel
Rilsan Coated Carbon Steel
= C (standard)
= N
= X
= V
4
Max working
pressure
(Bar)
For 0.2 (AS)
For 0.7 (AS)
For 1-55 (AS)
For 60-130 (AS)
For 10-55 (ASHF)
For 3-55 (ASWP)
For 1.5-6 (ASWD)
For 10-55 (ASWD)
For 150-575 (ASLV / ASLVHF)
= 330
= 350
= 360
= 330
= 330
= 30 / 50 / 70
120 / 165
= 70
= 30
= 16 / 35
2Nominal
Capacity (Ltrs)
= 0.2
= 0.7
= 1-55
= 60-130
= 10-55
= 3-55
= 1.5-55
= 150-575
MWP - 330 Bar (AS)
MWP - 350 Bar (AS)
MWP - 360 Bar (AS)
MWP - 330 Bar (AS)
MWP - 330 Bar (ASHF)
MWP - 30~165 Bar (ASWP)
MWP - 30~70 Bar (ASWD)
MWP - 16/35 Bar (ASLV / ASLVHF)
* Before ordering, check for availability
1 2 34510 12 13 14
11
–
AS P 360 C0C C V35
9
To indicate only if applicable
/ PO:10 / - -
678
G09 F

5
Ordering Code - Accumulators
1 2 34510 12 13 14
11
–
AS P 360 C0C C V35
9
To indicate only if applicable
/ PO:10 / - -
678
G09 F
6
BSPP (Parallel Thread)
BSPT (Taper Thread)
NPT (Taper Thread)
To suit SAE 3000 PSI flange
To suit SAE 6000 PSI flange
Square Flange
SAE Internal Thread
Metric
UNI-DIN Flange
ANSI Flange
Adaptor (for use with type G connection)
Fluid Port
Connection
type
= G (standard)
= T
= N
= 3
= 6
= Q
= S
= M
= D
= A
= R# {# = G/T/N/S/M}
8
Female Thread
Male Thread
For SAE Flange
Flange
Socket Weld Nipple
= F
= M
= S
= L
= SW
7
for G
T
N
3
6
Q
R
1/8”
1/4”
3/8”
1/2”
3/4”
1”
1-1/4”
1-1/2”
2”
2-1/2”
3”
3-1/2”
4”
Multi Ports (R)
(Ref. other variants)
= 01
= 02
= 03
= 04
= 05
= 06
= 07
= 08
= 09
= 10
= 11
= 12
= 13
= zz
for S1-1/16”-12
1-5/8”-12
1-7/8”-12
= 21
= 22
= 23
for MM14x1.5
M16x1.5
M18x1.5
M22x1.5
M27x2.0
M32x1.5
M33x1.5
M40x1.5
M42x1.5
M45x1.5
M50x1.5
= 31
= 32
= 33
= 34
= 35
= 36
= 37
= 38
= 39
= 40
= 41
for DDN20/40
DN20/250
DN25/16
DN25/40
DN25/250
DN32/40
DN32/250
DN40/40
DN40/250
DN50/16
DN50/40
DN50/64
DN50/250
DN65/16
DN65/40
DN80/16
DN100/16
DN100/40
= 51
= 52
= 53
= 54
= 55
= 56
= 57
= 58
= 59
= 60
= 61
= 62
= 63
= 64
= 65
= 66
= 67
= 68
for A3/4” /300
3/4” /1500
1” /300
1” /1500
1-1/4” /300
1-1/4” /1500
1-1/2” /300
1-1/2” /1500
2” /150
2” /300
2” /400
2” /1500
2-1/2” /150
2-1/2” /300
2-1/2” /400
2-1/2” /1500
4” /150
4” /300
= 81
= 82
= 83
= 84
= 85
= 86
= 87
= 88
= 89
= 90
= 91
= 92
= 93
= 94
= 95
= 96
= 97
= 98
* Before ordering, check for availability
Fluid Port
Connection
design
Fluid Port
Connection
size
for AWN-RF
WN-RTJ
SO-RF
SW-RF
SW-RTJ
= WN
= WJ
= SO
= SW
= SJ

6
Ordering Code - Accumulators
10 Fluid Valve
material
Carbon steel
Nickel Coated carbon steel
Stainless Steel
Zn-Ni Coated Carbon Steel
= C (standard)
= N
= X
= Z
11 Gas Valve
material
Carbon steel
Nickel Coated carbon steel
Stainless Steel
Zn-Ni Coated Carbon Steel
= C (standard)
= N
= X
= Z
12 Gas Fill Valve
connection
Standard - 5/8” UNF
5/8” UNF in Stainless Steel
Without Gas Fill Valve
5/16” UNEF/Vg8
1/4” BSP
M16x2.0
5/16” UNEF (7/8 UNF Gas Fill Valve Body)
Double Lock Military Valve
7/8” UNF (Integral in 7/8 UNF Gas Valve)
M28x1.5
= V (standard)
= X
= 0
= 1
= 2
= 3
= 4
= 8
= 9
= M
9Test
Certification
Factory Testing
CE/PED
SELO / ML (China)
ASME Sec.VIII Divn.1 App.22 (w/o stamp)
ASME Sec.VIII Divn.1 App.22 - U stamp
Others / Dual Certification - on request
= 0
= 8
= 3
= 7W
= 7U
= -
= XX
13 Precharge
Pressure
Uncharged Condition
Precharge Pressure in bar
14 Other
Variants
Refer
page 7
= -
* Before ordering, check for availability
1 2 34510 12 13 14
11
–
AS P 360 C0C C V35
9
To indicate only if applicable
/ PO:10 / - -
678
G09 F

Ordering Code - Accumulators
Max. Flow Rates (l/min)
0.2
Typeò \ Size ð
AS / ASWP
ASHF
ASWD
ASLV
ASLVHF
0.7 to 1.5 3 to 6 10 to 55 60 to 130
160
-
-
-
-
300
-
100
-
-
600
-
150
-
-
150 to 575
1800
-
-
-
-
-
-
-
900
1200
1000
1800
300
-
-
7
1 2 34510 12 13 14
11
–
AS P 360 C0C C V35
9
To indicate only if applicable
/ PO:10 / - -
678
G09 F
* Before ordering, check for availability
14 Other
variants
Gas Side Variants
Protection cap in SS (if different from GVA)
Protection cap with Plastic Insert
Name plate in Brass
Name Plate in SS
7/8” UNF Gas Valve Body
M50x1.5 with 7/8” UNF Gas Valve Body
Lifting Hook
Adapter for connecting ¼” Gauge (without gauge)
Adapter with xxx bar 63mm Pressure Gauge
Adapter with xxx bar rupture disc
Adapter with xxx bar rupture disc + 1/4” BSPF Port
Adapter with xxx bar rupture disc + yyy bar 63mm Gauge
Adapter with xxx bar rupture disc + 1/4” NPTF Port
Adapter with xxx bar rupture disc + 3/8” NPTF Port
Adapter with xxx bar rupture disc + 1/2” NPTF Port
Adapter with VS214 Gas Safety Valve set at xxx bar
Adapter with VS224X Gas Safety Valve set at xxx bar
Adapter with 1/4” BSP Needle Valve
Adapter with 1/4” BSP Needle Valve in SS
Adapter with PGSV (Pressure Gauge Shut-off Valve)
Adapter with PGSV + xxx bar 63mm pressure gauge
External Variants
Finish Paint - RAL-5003
Liquid Side Variants
Liquid Adapter in SS (if different from FPA)
Poppet & spring in SS (if different from FPA)
Fluid Port Assembly without Bleed Port
3-Way adaptor - 1/2” BSPF x 1/4” BSPF
3-Way adaptor - 1/2” BSPF x 3/8” BSPF
3-Way adaptor - 1/2” BSPF x 1/2” BSPF
3-Way adaptor - 3/4” BSPF x 1/4” BSPF
3-Way adaptor - 3/4” BSPF x 3/8” BSPF
3-Way adaptor - 1” BSPF x 1/4” BSPF
3-Way adaptor - 3/4” NPTF x 1/4” NPTF
Internal Variants
Flushing to NAS-10
Flushing to NAS-9
Flushing to NAS-8
Flushing to NAS-7
Flushing to NAS-6
Flushing to NAS-5
= G01
= G02
= G03
= G04
= G05
= G06
= G07
= G11
= G12(xxx)
= G13(xxx)
= G14(xxx)
= G15(xxx/yyy)
= G16(xxx)
= G17(xxx)
= G18(xxx)
= G19(xxx)
= G20(xxx)
= G21
= G22
= G23
= G24(xxx)
= E01
= F10
= F09
= F08
= F07
= F06
= F05
= L01
= L02
= L03
= L11
= L12
= L13
= L14
= L15
= L16
= L17
Other special requirements = SPL
Standard Accumulator - Without any variants = --

Dimensions - AS/ASHF/ASWP (Poppet design)
* Depends on the pressure and design standards
0.2
0.7
1
1.5
3
4
5
6
10
12
15
20
24
28
32
50
60
80
100
130
10
15
20
24
32
50
3
4
5
6
10
15
20
25
28
35
37
55
1.6
2.2
4
5.3
9
12
14
16.5
26.5
30.5
36.5
44
51.5
58.5
73.5
102
135
169
203
233
33
37
56
66
94
132
*
*
*
*
*
*
*
*
*
*
*
AS 0.2
AS 0.7
AS 1
AS 1.5
AS 3
AS 4
AS 5
AS 6
AS 10
AS 12
AS 15
AS 20
AS 25
AS 28
AS 35
AS 55
AS 60
AS 80
AS 100
AS 130
ASHF 10
ASHF 15
ASHF 20
ASHF 25
ASHF 35
ASHF 55
ASWP 3
ASWP 4
ASWP 5
ASWP 6
ASWP 10
ASWP 15
ASWP 20
ASWP 25
ASWP 28
ASWP 35
ASWP 37
ASWP 55
330
360
330
330/
360
30/
48/
70/
120/
165
bar
Pre.
Max.
Model
A øD
CøF IB øE H A/F1 A/F2
kgs
ltrs R
G
Wt.
Vol.
Dry
Gas Fluid Port Connection (BSP)
250
280
300
355
540
405
465
530
570
600
670
880
1015
1140
1400
1915
1135
1395
1655
2045
620
800
930
1065
1450
1965
540
405
465
530
570
670
880
1015
1140
1400
1463
1915
22
47
60
60
60
47
47
60
40
52
65
101
137
137
52
65
101
51
90
114
168
223
356
226
*
*
*
20
25
55
55
55
25
25
55
26
36
53
77
97
97
36
53
97
---
11
11
11
*
*
*
140
140
140
140
140
140
140
24
32
70
90
90
32
32
70
23
32
50
70
90
90
50
50
70
1/2”
3/4”
1-1/4”
2”
2-1/2”
2-1/2”
1-1/4”
2”
—---
3/8”
3/8” - 1/2” - 3/4”
1/2” - 3/4” - 1”
1-1/4” - 1-1/2”
1” - 1-1/2” - 2”
1” - 1-1/2” - 2”
3/8” - 1/2” - 3/4”
1/2” - 3/4” - 1”
1-1/4” - 1-1/2”
AS/ASHF ASWP
8
Fig.3bFig.3a
Dimensions

Spare Parts List - AS/ASHF/ASWP (Poppet design)
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
1
Accumulator Shell
Bladder
Gas Valve Body
Rubber-coated Washer
Gas Valve Lock Nut
Protection Cap
Gas Fill Valve
Name Plate
Retaining Ring
“O” Ring
Supporting Ring
Spacer Ring
Fluid Port Ring Nut
Bleed Screw
Seal Ring
Fluid Port Body
Poppet
Spring
Brake Bushing
Self-Locking Nut
Adaptor O-Ring
Adaptor
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Item Description
#
Qty. AS 0.2 AS 0.7 AS 1~1.5 AS 3 AS 4~6 AS 10~55 AS 60~130
ASWP 3 ASWP 4~6 ASWP 10~55 ASHF 10~55
-
-
B10107
C10106
E10109
F10103
ASSY17
G10304
I10127
I56022
K10133
L10120
M10122
05XXXX
C13384
N10115
O10111
P10112
Q10113
803XXX
097009
-
A12022
H12024
R12030
-
-
B10107
C10106
E10109
F10103
ASSY17
G10304
I10146
211026
K10150
L10145
M10217
05XXXX
C13384
N10144
O10221
P10149
Q10226
S10228
161013
-
A12022
H12025
R12031
-
-
B10202
C10205
E10109
F10103
ASSY17
G10305
I10222
211030
K10227
L10223
M10217
05XXXX
C13384
N10144
O10221
P10149
Q10226
S10228
161013
-
A12042
H12044
R12050
-
-
B10333
C10334
E10302
F10301
ASSY17
G10306
I10317
237032
K10320
L10319
M10321
BBXXXX
C39XXX
N10311
O10310
P10322
Q10314
S10341
212013
-
A12062
H12064
R12080
-
-
B10333
C10334
E10302
F10301
ASSY17
G10306
I10406
252030
I10405
I10404
I10402
BBXXXX
C39XXX
I10401
I10408
I10409
I10410
807XXX
226035
-
A12062
I12401
I12405
-
-
B10024
C10024
E10023
PCAPFM
-
-
I10035
I15022
K10038
L10037
M10039
-
-
N10031
O10028
P10029
-
S10030
-
-
A12002
H12004
R12010
-
-
B10107
C10104
E10109
F10103
ASSY17
G10304
I10123
I56022
K10133
L10120
M10122
05XXXX
C13384
N10115
O10111
P10112
Q10113
S10114
097013
-
A12021
H12023
R12030
Gas Valve Assembly
- consists item # 3 to 7
Fluid Port Assembly
- consists item # 9 to 20
Gasket Set
- consists item # 9,10,11, 15
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
1
9
AS/ASHF ASWP
Fig.4bFig.4a
* For Carbon Steel & Nitrile components
Part Number *

Dimensions - ASWD/ASLV/ASLVHF (Disc design)
* Depends on the pressure and design standards
10
ASWD ASLV/ASLVHF
Fig.5bFig.5a
Dimensions
ASWD 1.5
ASWD 3
ASWD 4
ASWD 5
ASWD 6
ASWD 10
ASWD 15
ASWD 20
ASWD 25
ASWD 28
ASWD 35
ASWD 37
ASWD 55
ASLV 150
ASLV 200
ASLV 275
ASLV 300
ASLV 375
ASLV 475
ASLV 530
ASLV 575
ASLVHF 150
ASLVHF 200
ASLVHF 275
ASLVHF 300
ASLVHF 375
ASLVHF 475
ASLVHF 530
ASLVHF 575
Model
A/F1 A/F2
32
70
–-
–--
70
80
120
–-
–--
11
14
56
56
140
140
---
---
74
88
130
–-
–-
IH
290
460
355
412
472
470
610
750
895
1025
1325
1392
1791
1132
1347
1688
1787
2112
2552
2805
2987
1222
1437
1778
1877
2202
2642
2895
3077
47
60
180
180
114
168
219
559
559
1.5
3
4
5
6
10
15
20
25
28
35
37
55
150
200
275
300
375
475
530
575
150
200
275
300
375
475
530
575
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
70
30
16/
35
16/
35
48
50
441
639
845
868
1011
1245
1378
1473
531
729
935
958
1101
1335
1468
1563
25
55
–-
–
72
88
130
–-
–-
bar
Pre.
Max.
AøD
CøFB øE
BSPBSP
kgs
ltrs
R
G
Wt.
Vol.
Dry
Gas Fluid Port Conn.
–
øL

Spare Parts List - ASWP/ASLV/ASLVHF (Disc design)
2
3
4
5
67
8
9
10
11
12 13
1
18
17
16
2
1
19
7
5
20,21
22
23
23
Accumulator Shell
Bladder
Gas Valve Body
Rubber-coated Washer
Gas Valve Lock Nut
Protection Cap
Gas Fill Valve
Name Plate
Bleed Screw
Seal Ring
Anti-Extrusion Assy.
Adaptor O-Ring
Adaptor
Gas Valve Assy.
Gasket Set
Circlip
O-Ring
O-Ring
Lifting Hook
Air Bleed Screw
Seal Ring
O-Ring
Drain Plug
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
Item Description
#
Qty. ASWD 1.5 ASWD 3 ASWD 4~6 ASWD 10~55 ASLV 150~575 ASLVHF 150~575
-
-
B10202
C10205
E10109
F10103
ASSY17
G10305
06XXXX
C13384
I10446
212013
-
A12042
R12385
-
-
-
-
-
-
-
-
A12042
N/A
-
-
B10333
C10334
E10302
F10301
ASSY17
G10306
06XXXX
C39XXX
I10421
257018
-
A12062
R12386
-
-
-
-
-
-
-
-
A12062
N/A
-
-
-
-
GLN001
-
ASSY17
-
-
-
-
-
-
-
-
265915
273028
255019
LHOOK1
H0508X
B51003
218028
GJXXXX
N/A
GASK001
-
-
-
-
GLN001
-
ASSY17
-
-
-
-
-
-
-
-
265915
273028
255019
LHOOK1
H0508X
B51003
218028
GJXXXX
N/A
GASK001
-
-
B10107
C10106
E10109
F10103
ASSY17
G10304
05XXXX
C13384
I10445
211026
-
A12022
R12384
-
-
-
-
-
-
-
-
A12022
N/A
-
-
B10107
C10106
E10109
F10103
ASSY17
G10304
05XXXX
C13384
I10445
211026
-
A12022
R12384
-
-
-
-
-
-
-
-
A12022
N/A
Gas Valve Assembly
- consists item # 3 to 7
Gasket Set
- consists item # 17, 18, 22
11
ASWD ASLV/ASLVHF
Fig.6bFig.6a
* For Carbon Steel & Nitrile components
Part Number *

12
1Design
= S (standard)
= ST
= SL
Standard
Transfer Barrier
Liquid Separator
3Bladder & Seal
material
Nitrile (NBR)
Butyl (IIR)
Viton (FKM)
Ehtylene-Propylene (EPDM)
Hydrogenated Nitrile (HNBR)
Neoprene (CR)
Nitrile for Hydrocarbons
Low Temp. Nitrile
Epichlorohydrin (ECO)
For foods
= P (standard)
= B
= V
= E
= K
= N
= H
= F
= Y
= A
2Nominal
Capacity (Ltrs)
= 0.2-130
= 150-575
0.2 - 130 Ltrs (type : AS/ASHF/ASWD/ASWP)
150 - 575 Ltrs (type : ASLV/ASLVHF)
4Gas Valve type
= 0
= U5/8
= M22
= M22-B
= M22L
= M30
= M50
= M50L
= U7/8
= U7/8V
= U7/8V-B
= U7/8U
= MU7/8
= MU7/8U
= MU7/8V
= LV
5Gas Valve
material
Without Valve (only bladder)
Carbon steel
Nickel Coated carbon steel
Stainless Steel
Zn-Ni Coated Carbon Steel
= 0
= C (standard)
= N
= X
= Z
6Gas Fill Valve
connection
5/8” UNF
5/8” UNF in Stainless Steel
Without Gas Fill Valve/Transfert/Liquid Separator type
5/16” UNEF/Vg8
1/4” BSP
M16x2.0
5/16” UNEF (7/8 UNF Gas Fill Valve Body)
Double Lock Military Valve
7/8” UNF (Integral in 7/8 UNF Gas Valve)
M28x1.5
= V (standard)
= X
= 0
= 1
= 2
= 3
= 4
= 8
= 9
= M
Ordering Code - Bladder Assembly
1 2 345 6
S - 35 - P - M50 - C - V
* Before ordering, check for availability
(Refer page # 14 & 15)
Gas Valve |
Without |
5/8” UNF(M) |
M22x1.5(M) |
M22x1.5(M) - special profile |
M22x1.5(M) 50mm extra long |
M30x1.5(M) |
M50x1.5(M) |
M50x1.5(M) 50mm extra long |
7/8” UNF(M) |
7/8” UNF(M) |
7/8” UNF(M) - special profile |
7/8” UNF(M) |
M50x1.5 with 7/8” UNF(M) |
M50x1.5 with 7/8” UNF(M) |
M50x1.5 with 7/8” UNF(M) |
Integral valve |
Gas Fill Valve
Without (only bladder)
Integral - 5/8” UNF
Various - screw-in
Various - screw-in
Various - screw-in
Various - screw-in
Various - screw-in
Various - screw-in
Various - screw-in
Integral - Vg8
Integral - Vg8
Integral - 7/8” UNF
Various - screw-in
Integral - 7/8” UNF
Integral - Vg8
Integral ASLV/ASLVHF
Refer
Fig.8a & 8b

Design
The main feature of the bladder lies in an original and well
developed EPE process by which the standard bladder
being of a single piece construction without splices or
joints and with a unique method for connecting gas valves,
allows various valves to be fitted thus promoting
considerable economic savings, especially when several
accumulators of the same size, but with differing gas
valves, are to be used in the same plant.
In addition, valves do not have to be replaced at the same
time as the bladder.
The assembly of the valve to the bladder is a simple
operation by use of a special rubber coated washer
(Fig.19).
Technical/constructional features
THE BLADDER used on standard version of the
accumulator is in butadiene-acrilonitrile rubber, oil
resistant (nitrile) suitable for operating temperature - 20ºC
to +85ºC. Other materials as indicated in ordering code
also available.
THE GAS VALVE is of phosphated carbon steel in
the following three versions:
S = STANDARD - Fitted with gas fill valve suitable for
stand-alone accumulators.
ST = TRANSFERT - For accumulators where additional
gas bottles are used.
SL = LlQUID SEPARATOR - For applications where
the bladder separates two liquids.
Bladder Design | Dimensions
Bladder dimensions
S 0.2
S 0.7
S 1
S 1.5
S 2.5
S 3
S 4
S 5
S 6
S 10
S 12
S 15
S 20
S 25
S 28
S 35
S 37
S 55
Model
ØD
mm
Weight
Kgs
L
mm
38
74
95
145
198
148
120
131
193
318
362
198
273
343
305
360
440
580
750
910
1105
1160
1538
0.03
0.06
0.13
0.17
0.30
0.35
0.39
0.42
0.46
0.92
1.10
1.30
1.75
2.15
2.50
3.30
3.40
4.60
ØD
L
13
Fig.7
Note : EPE reserves the right to supply bladder assemblies in 2, 3 or multiple pieces joined together and/or gas stem moulded with bladder making it
inseparable. In such case no spare gas valve will be required.

Valve Designs | Availability
Gas Valve types (refer Bladder Ordering Code - Page # 12)
14
Type : U5/8
Type : M22 & M22-B
Type : M50
Type : M30
Type : M22L
Type : M50L
Type : MU7/8U
Type : MU7/8V
5/8” UNF M30x1.5
M22x1.5M22x1.5
M50x1.5
7/8” UNF
Fill Valve
Fill Valve
Fill Valve
Fill Valve
Fill Valve
M50x1.5 M50x1.5
M50x1.5
7/8” UNF
Vg8 (Fill Valve)
Fill Valve
Fill Valve
Fig.8a
Type : MU7/8
M50x1.5
7/8” UNF
Fill Valve

Valve Designs | Availability
Gas Valve types (refer Bladder Ordering Code - Page # 12)
15
Type : U7/8
Type : U7/8V & U7/8V-B
Type : U7/8U
Type : U5/8 (SL)
Type : M22 (SL)
Type : M50 (SL)
Type : M22 (ST)
Type : M50 (ST)
M50x1.5
M50x1.5
M22x1.5
M22x1.5
7/8” UNF
7/8” UNF
Fill Valve
7/8” UNF
Vg8 (Fill Valve)
Fill Valve
5/8” UNF
Fig.8b

Valve Designs | Availability
Gas Valve types availability (refer Bladder Ordering Code - Page # 12)
16
ü=Available. û=Not available.
Code Description | Capacity ò ð 0.2 0.7 1~3 4~6 10~55 60~130
Without Gas Valve (only bladder)
5/8” UNF(M) with Integral 5/8” fill valve
M22x1.5(M) Body for screw-in fill valve
M22x1.5(M) Body for screw-in fill valve - for Bosch
M22x1.5(M) Body for screw-in fill valve - long body
M30x1.5(M) Body for screw-in fill valve
M50x1.5(M) Body for screw-in fill valve
M50x1.5(M) Body for screw-in fill valve - long body
7/8” UNF(M) Body for screw-in fill valve
7/8” UNF(M) with Integral Vg8 fill valve
7/8” UNF(M) with Integral Vg8 fill valve - for Bosch
7/8” UNF(M) with Integral 7/8” fill valve
M50x1.5/7/8” UNF(M) with screw-in fill valve
M50x1.5/7/8” UNF(M) with Integral 7/8” fill valve
M50x1.5/7/8” UNF(M) with Integral Vg8 fill valve
5/8” UNF(M) - Liquid Separator design
M22x1.5(M) - Liquid Separator design
M50x1.5(M) - Liquid Separator design
M22x1.5(M) - Transfert design
M50x1.5(M) - Transfert design
0
U5/8
M22
M22-B
M22L
M30
M50
M50L
U7/8
U7/8V
U7/8V-B
U7/8U
MU7/8
MU7/8U
MU7/8V
U5/8
M22
M50
M22
M50
ü ü ü ü ü û
ü ü ü ü ûû
üü ü ü
ûü
üü ü
û û û
üü ü ü
ûü
ü ü
û û û û
ü ü
û û û û
üü ü ü
ûü
üü ü ü
ûü
üü ü ü
ûü
üü ü
û û û
ü ü
û û û û
üü ü
û û û
üûû û û û
ûû
û û û
ü ü ü
û
ü ü
û
ûû
û û û
ü ü ü
û
ü ü
û
ü ü
ûû û û û
ü ü
ûû û û û

A øD
CF1 F3
BøEF2 F4
525
370
435
495
505
685
815
950
1340
1855
970
1290
1765
745
905
1225
1700
2500
64
97
70
21
25
34
18
18
114
168
220
219
219
46
50
50
-
1-1/2”
2-1/2”
2-1/2”
1”
ø33
ø50
ø50
-
1/4”
1/2”
1”
3/4”
ø20
ø46
-
-
3
4
5
6
10
15
20
24
32
50
25
35
50
20
25
35
50
75
11
15
17
19
34
44
51
59
81
114
48
64
89
40
48
65
89
130
BA 3
BA 4
BA 5
BA 6
BA 10
BA 15
BA 20
BA 25
BA 35
BA 55
BB 25
BB 35
BB 50
BD 20
BD 25
BD 35
BD 50
BD 75
360
360
360
bar
Pre.
Max.
Model
kgs
ltrs
Fig
Wt.
Vol.
Dry
Gas
8
9
10
Gas Bottle design
Accumulator design
Neck design
Threaded design
Ordering Code | Dimensions - Gas Bottles
1 2 345 6
BB 0360 C 25 0
Dimensions
F1
F2
F3
F1
F2
F3
F1
F4
F3
1Design
Accumulator Design
Neck Design
Threaded Design
= BA
= BB
= BD
2Nominal Volume
(Ltrs)
3-55 Ltrs (type : BA)
25-50 Ltrs (type : BB)
20-75 Ltrs (type : BD)
= 3 - 55
= 25 - 50
= 20 - 75
4Material Carbon Steel = C
3Max. Pressure 360 Bar = 360
6Certification Factory tested
CE/PED
= 0
= 8
5Connections Standard
Special
= 0
= S
17
Fig.11Fig.9 Fig.10
BDBA BB
* Check availability before ordering.

General
When the flow rate or the demand from accumulator
exceeds a single accumulator, accumulator stations are
deployed which are pre-fitted with valves and piping as
desired by the user to reduce installation time.
Single row stands of 2 to 5 accumulators (Fig.13) or double
row stands of 4 to 10 accumulators (Fig.12) are normally
assembled.
Construction
The accumulators are mounted on a fabricated steel frame
painted with a coat of rust inhibitor.
Depending on the quantity and the overall size , the
accumulators can be positioned in one row (Fig.13) or in
two rows (Fig.12). Each accumulator rests on a rubber
support ring, fastened with clamps, fitted with safety valve,
piping and fitting.
A delivery manifold (dimensions determined by the flow
rate and operating pressure) connects the various blocks.
The two ends have a BSP female thread, or, on request, are
flanged. One of the ends is closed off with a plug or blind
flange. The manifold linking the discharge outlets of each
block follows the same pattern. If requested, a pressure
gauge or pressure switch to control the delivery pressure
and a oil drip tank can be included. The double stand may
also be used for installing transfer accumulators connected
up to additional, parallel mounted, nitrogen bottles. A
number of variants can be supplied. To make the best
choice contact our technical team.
Accumulator Stations
AS 55... Accumulator
AS 35... Accumulator
Discharge Manifold
Safety Block
Delivery Manifold
AS 55... Accumulator
AS 35... Accumulator
Safety Block
Manifold Connections
(BSPF threads)
Oil drip tank
Delivery Manifold
Flanges (on request)
Discharge Manifold
18
Fig.12
Fig.13

General
All EPE accumulators are carefully inspected and tested at
the factory and are exactly as designated by the code
printed on the name plate.
In addition the name plate carries the accumulators serial
number and if specified on order, the value on precharge.
On the accumulator shell are also marked :
Manufacturer's serial number & date shell manufactured;
identification mark; design standard applicable; maximum
recommended working pressure; temperature range;
capacity in liters.
Accumulators are normally supplied empty (uncharged).
Nitrogen precharged units can be supplied on request.
ATTENTION: The max working pressure marked on the
accumulator must be ≥ that the calibrated pressure of the
relief valve.
Before undertaking any work on the hydraulic circuit for
mounting an accumulator, it is required to release the
pressure completely.
Test certificates if required are supplied with the
accumulator, or forwarded by mail.
Installation
To achieve a high degree of efficiency, the accumulator
should be fitted as close as possible to the installation it
serves.
The space necessary for testing and filling equipment is at
least 150mm above the gas-fill valve.
POSITION is possible from vertical one (gas valve on top)
to the horizontal one.
The manufacturers name plate stating initial pressure must
remain visible.
Access to vent screw must be kept unobstructed.
MOUNTING by means of clamps, brackets and rubber
support rings.
The mounting must be such that should a rupture occur
on the pipe system at the liquid connection, or should the
gas-fill valve break, the accumulator cannot be pulled
from its mounting by the forces involved.
No welding or other mechanical process must be carried
out on the accumulator shell for the purpose of attaching
fastenings.
CONNECTION adopters and flanges are available on
request. When fitting screws, reducers or the safety and
shut-off block, care must be taken that the accumulator
is held firmly by means of a spanner at the liquid valve,
so that the liquid valve is not turned independently of the
accumulator body.
To guarantee trouble free operation, the following points
should be observed:
ŸA non-return valve to be fitted between pump and
accumulator to prevent reversal.
ŸA relief valve must be fitted close to the accumulator
and set at lower than the max. working pressure
marked on the accumulator shell.
ŸA shut-off valve and a dump valve are recommended
to enable periodic checks or removals during normal
operation. EPE safety blocks Type B incorporate all
the essential functions.
Preliminary Checking
Upon receipt check:
That there has been no damage in transit.
The identification code is as ordered.
Before installation it is most important to ensure that the
gas pressure corresponds to the desired value.
The initial gas pressure must be selected to meet the
service requirement.
In general the design values are as follows:
P0 = 0.9 P1, ( energy reserve, line shock absorber, etc.)
P0 = 0.6 - 0.7 P1 ( pulsation damper )
Gas precharge pressure is of crucial importance to the
correct functions of the accumulator and the durability of
the bladder.
The gas pressure, when the accumulator is supplied pre-
charged is related to the temperature of 20°C.
In the case of accumulators supplied without pre-loading
pressure, or after repair work it is necessary to perform
inflation with nitrogen; must also be performed also the
verification of the system by using the equipment type-
PC following procedure - Checking & Charging - page-20.
Operation & Maintenance
Clamp
Supporting
Ring
Bracket
19
Fig.14

Initial Operation
Before the system is pressurised it has to be bled. For this,
the vent screw in the fluid port assembly has to be eased
until fluid emerges.
Then retighten the gas valve locknut carefully.
The system is charged with maximum pressure and
sealings and connections should be checked.
Periodic Checking
After the installation of a new unit, or following repairs, the
initial pressure must be tested as follows:
Atleast once during the first week so that any gas losses
can be immediately observed and remedied.
If no gas losses are observed during the first check, a
second check should be carried out approximately 3
months later,
If during this check no gas losses are evident, a six-month
check should be sufficient.
It is however recommend that heavy duty applications be
checked every month.
Checking & Charging
Pre-Loading & Checking Set type-PC (refer Fig.15) is to be
used for checking / charging of Bladder Accumulators.
When charging, the nitrogen bottles must be capable of
delivering pressure higher than the desired accumulator
gas pressure.
Use dry industrial nitrogen. NEVER USE OXYGEN OR AIR.
Proceed as follows:
ŸFit the suitable pre-charging equipment to the gas
valve;
ŸConnect it to the nitrogen cylinder with the charging
hose;
ŸSlowly introduce nitrogen into the accumulator until
reaching a pressure slightly above the required level;
ŸClose the valve of nitrogen cylinder and disconnect the
charging hose from the equipment;
ŸWait for the gas temperature stabilization;
ŸSet the pressure by venting off the excess of gas.
It is important that the gas pressure be kept constant and
should therefore be checked periodically by means of the
filling and checking equipment PC/...
The same equipment is used for re-inflating the bladder
after repair work or change of use.
Connection is made by the special hose to the dry
nitrogen bottle.
ONLY NITROGEN MUST BE USED. AIR OR OXYGEN
COULD CAUSE AN EXPLOSION.
Pressure Checks
This is simple operation, the correct procedure is as
follows:
ŸIsolate the accumulator from the system and reduce
the liquid pressure to zero.
ŸRemove the protective and sealing caps from the gas
valve.
ŸPrior to the mounting PC/ - equipment ensure that the
valve A is unscrewed, that bleed valve B is closed and
that is non-return valve C is screwed tight. (refer
Fig.16)
ŸAttach the unit to the gas-fill valve by means of the
knurled nut D.
ŸScrew valve A to a point where pressure is registered.
If the pressure is OK remove the PC/unit as follows:
ŸUnscrew the valve A.
ŸOpen the bleed valve B and unscrew the nut D.
Pressure Reduction
If the pressure has to be reduced this is done by opening
the bleed valve B slowly until the correct pressure is
registered on the gauge.
Operation & Maintenance
Bleed
Ring Nut
Non-Return Valve
Connection for
Charging Hose
Pin
5/8” UNF
125
20
Fig.15 Fig.16