3.1.2 HYDRAULIC SYMBOL

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1

3

.1.1 TECHNICAL DATA

MAX OPERATING PRESSURE (PS): 360 bar

PRESSURE TEST (PT): 1.43 x PS

NOMINAL CAPACITIES:

0.2 - 0.7 - 1 - 1.5 - 3 - 5 - 10 - 15 - 20 - 25 - 35 - 55 litres

WORKING TEMPERATURE: -40 ÷ +150 °C

COMPRESSION RATIO (Po : P2): max. 1 : 4

FLUID VISCOSITY RANGE: 10 ÷ 400 cSt

RECOMMENDED VISCOSITY: 36 cSt

FLUID CONTAMINATION DEGREE:

class 21/19/16 according to ISO 4406/99

BODY MATERIAL:

- carbon steel shell painted with rust inhibitor RAL 8012

- nickel coating 25 - 40 µ

- stainless steel AISI 316L

- internal and external coating with RILSAN th. 0.6 mm

VALVES MATERIAL:

- phosphated or galvanized carbon steel in compliance with

Directive 2002/95/EC (RoHS) to resist to corrosion

- stainless steel AISI 316L

- nickel coating 25-40 µ

BLADDER MATERIAL:

- P = Nitrile rubber (NBR)

- F = Low temp. nitrile rubber

- H = Nitrile for hydrocarbons

- K = Hydrogenated nitrile (HNBR)

- B = Butyl (IIR)

- E = Ethylene-propylene (EPDM)

- N = Chloroprene (Neoprene)

- Y = Epichlorohydrin (ECO)

- V = Fluorocarbon (FPM)

See Table 3.1c and/or Chapter 1.5

FILLING VALVE CONNECTION:

- 5/8”-UNF std

- 7/8” UNF

- ¼” BSP

FLUID PORT CONNECTION: see 3.1d

FLOW RATE: see Table 3.1e

WEIGHT: see Table 3.1e

BLADDER ACCUMULATORS type AS and ASP

E 04-11

3.1

3.1a

3.1b

EPE ITALIANA s.r.l. - Viale Spagna,112 • 20093 Cologno Monzese (Mi) Italy

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BLADDER ACCUMULATORS type AS and ASP

E 04-11

3.

1

2

3

.1.3 “AS and ASP” BLADDER ADVANTAGES

- dirt tolerant

- light weight

- compact

- simple construction

-

quick response

- works well on water, low lubricity fluids

- quick, easy installation

- low cost

3.1.4 DESCRIPTION

Bladder-type accumulators consist of a seamless cylindrical pressure

vessel made of high-tensile steel.

The accumulator is subdivided into a gas and fluid side by an elastic

bladder mounted in the interior of the vessel.

The bladder is charged with nitrogen to the specified gas charge pressure

P0 by means of gas valve.

When the fluid is pressed into the accumulator, the gas in the bladder is

compressed and hence the pressure increased.

The gas volume reduces and on the fluid side, the fluid can flow into the

accumulator. As soon as the pressure on the fluid side falls below the

gas pressure, the accumulator is emptied.

Oil valve is provided in the oil port of the bladder-type accumulator and

closes when the pressure on the gas side is higher than the one on the

fluid side.

This prevents draining of the bladder into the oil channel and thus the

bladder from being destroyed.

When the minimum operating pressure is reached, a small oil volume is

to be maintained between the bladder and the fluid volume (approx. 10%

of the nominal capacity of the hydraulic accumulator), in order that the

bladder does not hit the valve during every expansion process.

Gas valve consists of external caps, sealing cap, filling valve, gas valve

body and rubber coated washer. These parts can be replaced separately.

The nameplate shows the technical data and features of the hydraulic

accumulator.

3

.1.5 EUROPE MARKET

All hydraulic accumulators are pressure vessels and are subject to the

national regulations and directives valid at the place of installation.

Bladder accumulator type AS, up to and including 1 litre, must not be CE

marked.

B

ladder accumulator type ASP, up to and including 1 litre and max. pres-

sure less than 200 bar, must not be CE marked.

For bladder accumulator type AS, greater than 1 litre and, in the case of

ASP, greater than 1 litre or 1 litre but with max. Pressure higher than 200

bar every shipping batch is complete of a conformity declaration and in-

struction of use and maintenance and/or all documents requested.

All vessel categories (see Table 3.1e) must be protected by means of a

pressure relief valve in accordance with Directive 97/23/EC.

3.1.6 ACCESSORIES

For support equipment, see Cap. 7

For gas side’s safety equipment, see Cap. 8

For fluid side’s safety equipment, see Cap. 9

For pre-loading and charging set, see Cap. 11

For other components, see Cap. 12

C

ode

l

etter

P

olymer

I

SO

T

emperature

r

ange (°C)

S

ome of the liquids compatible with the polymer

P Standard nitrile (Perburan) NBR -20 ÷ +80 Aliphatic hydrocarbons (propane, butane, gasoline, oils, mineral grea-

ses, diesel fuel, fuel oil, kerosene), mineral greases and oils, HFA -

HFB - HFC fluids, many dilute acids, alkalis, saline solutions, water,

water glycol.

F Low temperature nitrile NBR -40 ÷ +70 The same as with standard nitrile + a number of different types of

Freon. (This contains less acrylonitrile than the standard and is there-

fore more suitable for low temperatures, but its chemical resistance is

slightly lower).

H Nitrile for hydrocarbons NBR -10 ÷ +90

Regular and premium grade slightly aromatic gasoline (and all the li-

quids for standard nitrile).

K Hydrogenated nitrile HNBR -30 ÷ +130 The same as with standard nitrile but with excellent performance at

high and low temperatures.

B Butyl IIR -30 ÷ +100 Hot water up to 100°C, glycol-based brake fluids, many acids and

bases, salt solutions, polar solvents such as alcohols, ketones and

esters, polyglycol-based hydraulic fluids (HFC fluids) and bases of

esters of phosphoric acid (HFD-R fluids), silicone oils and greases,

Skydol 500 and 7000, resistance to ozone, aging and weathering.

E Ethylene-Propylene EPDM -30 ÷ +100 Hot water up to 100°C, glycol-based brake fluids, many organic and

inorganic acids, detergents, solutions of sodium and potassium, pho-

sphate ester-based hydraulic fluids, (HFD-R), silicone oils and greases,

many polar solvents (alcohol, ketones, esters), Skydrol 500 and 7000,

resistance to ozone, aging and weathering.

N Chloroprene (Neoprene) CR -30 ÷ +100 Mineral oils of paraffin, silicone oils and greases, water and aqueous

solutions, refrigerants (ammonia, carbon dioxide, Freon), naphthenic

mineral oils, low molecular aliphatic hydrocarbons (propane, butane,

fuel), brake fluids based on glycol, better resistance to ozone, weathe-

ring and aging compared to NBR rubber.

Y Epichloridrin ECO -30 ÷ +110 Mineral oils and greases, aliphatic hydrocarbons (propane, butane and

gasoline), silicone oils and greases, water at room temperature, resi-

stance to ozone, aging and weathering.

V Fluorocarbon FPM -10 ÷ +150 Mineral oils and greases, non-flammable fluids of HFD group, silicone oils

and greases, animal and vegetable oils and greases, aliphatic hydrocar-

bons (gasoline, butane, propane, natural gas), aromatics hydrocarbons

(benzene, toluene), chlorinated hydrocarbons (Tetrachloroethylene, car-

bon tetrachloride), fuel (regular, super and containing methanol), excellent

resistance to ozone, weathering and aging.

BLADDER ACCUMULATORS type AS and ASP

E 04-11

3.1

EPE ITALIANA s.r.l. - Viale Spagna,112 • 20093 Cologno Monzese (Mi) Italy

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3

For other hydraulic fluid and/or temperatures, please consult us.

3

.1.7 BLADDER-TEMPERATURE-LIQUID COMPATIBILITY

When selecting the accumulator variant, pay attention to the following non-binding notes with regard to hydraulic fluid, bladder material and the per-

missive temperature range. (see Section 1.5)

3.1c

EPE ITALIANA s.r.l. - Viale Spagna,112 • 20093 Cologno Monzese (Mi) Italy

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BLADDER ACCUMULATORS type AS and ASP

E 04-11

3.1

4

3.1.8 ORDER CODE

Special variants on request

9 • Type of filling valve

Standard filling valve 5/8” UNF thread= V

Standard filling valve with 5/8” UNF

thread in stainless steel = VX

Without filling valve (thread hole M12x1.5) = V0

Brass filling valve ¼” BSP = V2

Filling valve 7/8” UNF = V4

1 • Series

Bladder accumulator = AS

Bladder accumulator for fluid gr. 1

(

dangerous) = ASP

2 • Nominal capacity (litres)

Fig. 1 = 0.2

Fig. 2 = 0.7

Fig. 2 = 1

Fig. 2 = 1.5

Fig. 2 = 3

Fig. 2 = 5

Fig. 2 = 10

Fig. 2 = 15

Fig. 2 = 20

Fig. 2 = 25

Fig. 2 = 35

Fig. 2 = 55

3 • Bladder material

Nitrile rubber (NBR) = P

Nitrile for low temp. = F

Nitril for hydrocarbons = H

Hydrogenated nitrile (HNBR) = K

Butyl (IIR) = B

Ethylene-propylene (EPDM) = E

Chloroprene (Neoprene) = N

Epichlorohydrin (ECO) = Y

Fluorocarbon (FPM) = V

5 • Body material

Carbon steel = C

Nickel coated carbon steel 25 µ = N

Nickel coated carbon steel 40 µ = M

Stainless steel = X

Rilsan coating = V

AS 25 P 360 CR G4 V-8-C0C0R250 / 30

4 • Max working pressure (PS)

See the table on front page

6 • Fluid port connection

See the table on front page

7 • Dimension of the connection fluid

or 7+8 table

See the table on front page

15 • Other variants

See the table on front page

10 • Test and certification

Factory testing = 0

GOST-R (Russia) = 1

Australian Standard = 2

ML (China) = 3

RINA = 4

PED97/23/EC(for capacitiesgreater than 1 l)

= 8

ATEX 94/9EC = 9

DNV = 10

RTN Passport (Ukraine) = 11

Algeria passport = 12

11 • Fluid valve material

Carbon steel = C

Nickel coated carbon steel 25 µ = N

Nickel coated carbon steel 40 µ = M

Stainless steel = X

12 • Variants of fluid side

Standard = 0

Adapter in stainless steel (R) = 1

Button and spring in stainless steel=2

Other numbers/variants to be requested EPE

13 • Gas valve material

Carbon steel = C

Nickel coated carbon steel 25 µ = N

Nickel coated carbon steel 40 µ = M

Stainless steel = X

14 • Variants of gas side

Standard = 0

Only cap in stainless steel = 1

Brass nameplate = 2

Other numbers/variants to be requested EPE

1

6 • Precharge pressure (bar)

Standard 30 bar = 0 ÷ 300 (< PS)

BLADDER ACCUMULATORS type AS and ASP

E 04-11

3.1

EPE ITALIANA s.r.l. - Viale Spagna,112 • 20093 Cologno Monzese (Mi) Italy

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6 • Fluid port connection

For AS0.7÷55 BSP ISO 228

with chamfer for OR (std) = A

For AS0.2 BSP ISO 228 (std) = G

For AS3÷55 Metric = M

For AS0.7÷55 NPT-F = P

For AS3÷55 internal thread SAE = S

For AS3÷55 adapter for flange SAE 3000 Psi = L

For AS3÷55 adapter for flange SAE 6000 Psi = H

For AS0.7÷55 flange ANSI = B

F

or AS0.7÷55 flange UNI = U

For AS0.7÷55 square flange = Q

For AS0.7÷55 adapter * = R

*

assembled on the fluid valve connection type A

4 • Max working pressure (PS)

Capacity litres Carbon steel Stainless steel

0,2 ÷ 3

5 ÷ 55

360

(100 only for ASP type)

360

(100 only for ASP type:

210 only for the version with

connection L or other pressure

related to connections B or U)

150 - 210 - 360

80 - 150 - 210 -360

7 • Dimension of the connection fluid

For the type of connection:

A (0.7÷1.5 l) ¾” = 5

(3÷5 l) 1” ¼ = 7

(10÷55 l) 2” = 9

G (0.2 l) ½” = 4

M (3÷5 l) 40x1.5 = 40/1.5

(10÷55 l) 50x1.5 = 50/1.5

P (0.7÷1.5 l) ¾” = 5

(3÷5 l) 1” ¼ = 7

(10÷55 l) 2” = 9

S (0.7÷1.5 l) 1” 1/16 12UN = 1 1/16-12

(3÷5 l) 1” 5/8 12UN = 1 5/8-12

(10÷55 l) 1” 7/8 12UN = 1 7/8-12

L (3÷5 l) 1” ¼ SAE3000 = 7

(10÷55 l)1” ½ SAE 3000 = 8

2” SAE 3000 = 9

H (3÷5 l) 1” ¼ SAE6000 = 7

(10÷55 l)1” ½ SAE 6000 = 8

2” SAE 6000 = 9

B (0.7÷55 l) DIMENSION/RATING

Former. 1” ANSI 1500 = 1/1500 (Pmax = 250 bar)

U (0.7÷55 l) DN/PN

Former. DN50 PN100 = 50/100 (Pmax = 100 bar)

Q (3÷5 l) 1” ¼ = 7

(10÷55 l) 2” = 9

R (0.7÷55 l) Blind

= 0

R (0.7÷55 l) internal thread

BSP ISO 228 = G*

NPT-F = P*

BSPT = N*

SAE = S*

Metric = M*

*Variant in table 8

15 • Other variants

Adapter + rupture disc set at xxx bar = Rxxx

(see Section 8.2)

Adapter + Safety valve, type VS224/TX set at xxx bar = Sxxx

Adapter + Needle Valve of ¼” BSP = EG2

Adapter + Stainless steel needle Valve of ¼ BSP = EG2X

Adapter + excluding device with with full scale

pressure gauge of xxx bar = EMxxx

Adapter + excluding device of 90° with full scale

pressure gauge of xxx bar = ELMxxx

Flushing with degree of contamination ≤ x = Fx

75-80 μ thick polyurethane paint with colour

to be specified = W

Off-shore paint with colour to be specified = Z

NORSOK System 1 paint with colour to be specified = K1

NORSOK System 7 paint with colour to be specified = K7

other variants upon request

Special variants upon request

8 • Dimension

1/8“ = 1

¼“ = 2

3/8“ = 3

½“ = 4

¾“ = 5

1“ = 6

1“ ¼ = 7

1“ ½“ = 8

Dimension in inch - No.of pitch for inch

Diameter/pitch

EPE ITALIANA s.r.l. - Viale Spagna,112 • 20093 Cologno Monzese (Mi) Italy

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BLADDER ACCUMULATORS type AS and ASP

E 04-11

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6

* The maximum differential pressure is the maximum allowable difference between the maximum pressure and the minimum working pressure (P2-P1) to have an infinite life cycle of the

accumulator (greater than 2,000,000 cycles).

** Flow rate measured using mineral oil with viscosity of 36 cSt at 50°C and ∆P = 5 bar

3.1e

3.1d

3

.1.9 DIMENSIONS

AS0,2

ASP0,2

AS0,7

ASP0,7

AS1

ASP1

AS1,5

ASP1,5

AS3

ASP3

AS5

ASP5

AS10

ASP10

AS15

ASP15

AS20

ASP20

AS25

ASP25

AS35

ASP35

AS55

ASP55

Accumulator

type

AS-ASP

in carbon

steel

0,2

0,7

1

1,5

3

5

10

15

20

25

35

55

Nominal

gas

volume

litres

0,2

0,65

1

1,5

2,95

5

9,1

14,5

18,2

23,5

33,5

50

Effective

gas

volume

litres

360

Working

pressure

bar

Ped

category

for the

liquids of

group 2

100

Maximum

differential

pressure

bar

160

300

600

1000

Flow

rate

l/min

1:4

Maximum

compression

ratio

P0/P2

250 ± 2

280 ± 1,5

295 ± 15

355 ±5

553 ± 8

458 ± 10

568 ± 10

715 ± 10

873 ± 10

1043 ± 15

1392 ± 15

1910 ± 15

A

mm

22

47

60

B

mm

40

52

65

101

C

mm

53 ± 0,1

90 ± 0,5

117 ± 1

114 ± 1

168 ± 1,5

220 ± 2

ØD

mm

20

25

60

ØE

mm

26

36

53

77

ØF

mm

140

I

mm

24

32

70

SW

1

mm

23

32

50

70

SW

2

mm

1,7

4,2

5,2

6,3

11

15

33

43

48

59

78

108

Dry

weight

kg

Art.3 (3)

III

Art.3 (3)

III

Art.3 (3)

III

II

III

IV

III

IV

BLADDER ACCUMULATORS type AS and ASP

E 04-11

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7

3

.1.10 SPARE PARTS CODE

1 Accumulator shell 1 Not supplied as spare part

2 Bladder 1 10092 10191 10189-10192 10193 10289 10390

3 Gas valve body 1 2001 10107 10202 10333

4 Rubber-coated washer 1 10024 10104 10106 10205 10334

5 Gas valve locknut 1 10023 10109 10302

6 Protection cap 1 10337 10103 10301

7 Gas-fill valve 1 – 2072

8 Name plate 1 – 10300-A 10300-B 10300-C 10300-D

9 Retaining ring 1 10035 10123 10127 10146 10222 10317

10 “O” ring 1 OR4112 OR4150 OR159 OR6212 OR181

11 Supporting ring 1 10038 10133 10150 10227 10320

12 Space ring 1 10037 10120 10223 10319

13 Fluid port ring nut 1 10039 10122 10217 10321

14 Bleed screw 1 – 10128 10316-A

15 Seal ring 1 – 10129 10336-A

16 Fluid port body 1 10031 10115 10144 10311

17 Poppet 1 10028 10111 10221 10310

18 Spring 1 10029 10112 10149 10322

19 Brake bushing 1 – 10113 10226 10314

20 Selflocking nut 1 10033 10116 10211 10315

21 Adapter “O” ring 1 – OR2093 OR3150 OR3218

22 Adapter 1 – 10131/Ø thread code 10233/Ø thread code

10323/Ø thread code

Gas valve assembly

(parts 3-4-5-6-7) 1 2002-** 2021-** 2022-** 2042-** 2062-**

Fluid port assembly

(parts 9 ÷20) 1 2004-** 2023-** 2024-** 2025-** 2044-** 2064-**

Gasket sets 1 2010-* 2030-* 2031-* 2050-* 2080-*

Item Description Pcs.

ASP 0,2 ASP 0,7

Models

ASP 1 - 1,5

ASP 3 ASP 5

ASP 10-15-20-25-35-55

AS 0,2 AS 0,7

AS 1 - 1,5

AS 3 AS 5

AS 10-15-20-25-35-55

OR2050

10341

10342

OR4112

10038

OR2050

10341

10342

OR4150

10133

10129

OR2093

OR2050

10341

10342

OR159

10149

10129

OR3150

OR2050

10341

10342

OR6212

10227

10129

OR3150

OR2050

10341

10342

OR181

10320

10336

OR3218

{

{{

3.1g

3.1f

EPE ITALIANA s.r.l. - Viale Spagna,112 • 20093 Cologno Monzese (Mi) Italy

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BLADDER ACCUMULATORS type AS and ASP

E 04-11

3.1

8

3

.1.11 COMMISSIONING AND MAINTENANCE

Delivery conditions

Bladder accumulators are delivered pre-charged with nitrogen at a pres-

sure of 30 bar or at value of pressure required at time of order. The pre-

c

harge value is also on the nameplate of the accumulator.

Depending on the size and quantity ordered, the bladder accumulators

are shipped in boxes, in cartons, on pallets or wooden boxes on request.

Unless otherwise required, certificates and documentation are provided

together with the accumulators.

Handling

The original packaging is suitable for handling and storage. Where ne-

cessary, you should use suitable lifting equipment to support the weight

of the accumulators.

However protect from impact the packaging and handle it with care.

Storage

During storage in the warehouse, leave the product in its original packa-

ging, keeping it away from heat sources and naked flames. The storage

temperature should be between +10 and +40°C.

After six years of storage, it is essential to proceed with the replacement

of all elastomeric parts before the commissioning.

Marking on the nameplate of the accumulator

With reference to the PED 97/23/EC classification, Article 3, Paragraph

3 and / or risk categories I or II depending to the volume and maximum

working pressure, the accumulator indicates the following data:

- Logo, name and country of the manufacturer

- Mounth/year of production

- Product code

- Serial number

- Maximum PS pressure and PT test pressure in bar

- Min. and max. TS working temperature in Celsius

- Volume V in litres

- Group of fluids allowed (II)

- CE marking (for volumes exceding 1 litre) with the identification number

of the notified body

- Pre-charge pressure in bar

It is strictly forbidden to:

- weld, rivet or screw any item of the accumulator

- engrave or permanently stamp the surfaces of the accumulator shell

and / or carry out other operations that could affect or change the me-

chanical properties of the accumulator

- use the accumulator as a structural element: it should not be subjected

to stresses or loads

- change the data of the nameplate and / or accumulator without the

permission of the manufacturer

- use a (dangerous) fluid of Group 1 with equipment designed and ma-

nufactured for fluids of Group 2.

Installation

Before installation, you must perform a visual check to verify that the

accumulator has not suffered any damage during shipping / handling.

Verify that the requested type matches with what stamped on the na-

meplate.

We recommend using the accumulator with a suitable security valve (see

Chapter 8) or a security block type BS (see Chapter 9). This device pro-

v

ides user and equipment protection against possible damage caused

by pressure surges and also makes the maintenance of the accumulator

easier, facilitating the interception and the discharge.

Provide for a space of 200 mm above the gas pre-charge valve to allow

access to and control of the pre-charge equipment (see Chap.11.1).

T

he accumulators type AS may be installed in any position from horizon-

tal to vertical (preferably with the pre-charge valve at the top), and the

nameplate must be visible.

Proceed to the assembly so that no abnormal force affects the pipes con-

nected directly or indirectly to the accumulator, so we recommend the

use of supporting components and also fastening (please see Chapter

7) to avoid the transmission of vibrations.

If are not used EPE safety blocks, make sure that the accumulator is

connected to the hydraulic circuit by suitable connection devices.

Make sure the fluid is compatible with the elastomer of the bladder.

Check that the max. allowed accumulator pressure is equal to or greater

than that of the hydraulic circuit and that the temperature during operation

is maintained within the range expected.

Make sure the fluid does not contain contaminants and/or abrasive.

Pre-charge of nitrogen

Normally, the bladder accumulators are delivered pre-charged with pres-

surized gas. The pre-charge of gas can be controlled and / or adjusted be-

fore or after installation of the accumulator in the hydraulic circuit.

For the pre-charge, use only industrial dry nitrogen with a purity of min.

99%. It is important to use the nitrogen from a bottle equipped with a pres-

sure reducing valve (see Chap.11.3). Use the EPE pre-charge and char-

ging set type PC to check the charging pressure requires, and adjust if

necessary. If the pre-charge pressure is lower than required, connect the

charging hose on one side and the other side connect it to the nitrogen

bottle or to the pressure reducer. Slowly fill the nitrogen in the accumulator

until reaching a pressure slightly higher than that set value (+ 10 ÷ 15%).

Close the bottle and remove the charging hose pipe from the pre-loading

set; wait until the gas temperature has stabilized (2 hours) and calibrate

the pressure, discharging the excess gas.

Make sure that the gas valve is not subject to losses and, if necessary, use

soap and water.

Tighten the protective caps manually.

Hydraulic pressurization

- Check that the pre-charge pressure is adequate for the application.

- Ensure that the hydraulic pressure never exceeds the max allowed

pressure (PS) shown on the accumulator shell.

To avoid this risk, use a safety item (see Chap. 9).

Maintenance

- Periodically check the pre-charge pressure of the gas: after the com-

missioning, check after 2-3 weeks of operation and if there were no

leaks, repeat the operation after 3 months; if the pressure at the same

temperature was stable, repeat the test yearly. For heavy-duty applica-

tions, check the pre-charge every 6 months.

- Periodically (yearly) carry out a visual inspection of the accumulator in

order to detect any early signs of deterioration such as corrosion, defor-

mation, etc.

- Comply with the requirements of the regulations concerning the verifi-

cation of the functionality of the equipment according to the country of

installation of the accumulator.

BLADDER ACCUMULATORS type AS and ASP

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9

Repair

I

f for failure, scheduled check or retest it is necessary to remove the accu-

mulator from the system, prior to removal, isolate the accumulator from the

installation and discharge pressure of the liquid.

All bladder EPE accumulators of the AS and ASP series may be repaired.

It may consist in replacing the bladder, the seals, the pre-charge valve

a

nd/or the parts of the gas and fluid valve.

For reasons of functionality and security, it is recommended to use only

original spare parts.

Disassembly

- Fasten the accumulator firmly in a vice or on a bench in a horizontal

position, taking care not to damage the outer surface.

3.1h

- If you have not already carried out, unscrew the cap nut first and then

the valve cap of the gas valve.

3.1i

- Allow gas escapes from the bladder with the help of the check valve

until a pressure of 0 is displayed. Check if the bladder is now de-pres-

surizing an open valve.

3.1j

- Remove gas valve, unscrew the nut on the gas valve and remove the

nameplate.

3.1k

- Undo slotted round nut for hook wrench by using the hook wrench.

3.1l

- Remove the slotted nut and the retaining ring.

3.1m

- Push enough oil valve into the housing until the sealing ring and the

washer can be removed.

3.1n

- Remove the sealing ring and the washer.

EPE ITALIANA s.r.l. - Viale Spagna,112 • 20093 Cologno Monzese (Mi) Italy

Tel.: +39 02 25459028 • Fax: +39 02 25 25459773 • E-mail: epeitaliana@epeitaliana.it • Internet: www.epeitaliana.it

BLADDER ACCUMULATORS type AS and ASP

E

0

4

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1

3.1

10

Refitting

- Cleaning and testing: clean all metallic parts on accumulator using an or-

ganic degraser - visual inspection of oil valve parts (valve poppet, spring,

nut, breake bushing) - check valve for sluggishness - Clean bladder, i.e.

using isopropanol. Visual inspection of bladder for faults - inner inspection

of shell for signs of corrosion. In event of coated shell, check the condition

of the coating. Replace the parts deemed to be bad; the o-rings must al-

ways be replaced (see spare parts Section 3.1.10).

3.1s

- Drain air from bladder by pressing together.

3.1t

- Carefully moisten the inside of the bladder and the shell with the same

medium operation. That will be used during operation.

3.1u

- Reinstall according to this sequence: o-ring, support ring and space ring.

3.1o

- Remove the retaining ring, take it out, by carefully pushing the ring to-

gether.

3.1p

- Remove the oil valve from the shell.

3.1q

- Fold bladder somewhat and withdraw by turning it slightly.

If the pre-charge pressure is lower than required, connect the inflation tube

on one side and the other of the equipment. Connect it to the cylinder of

nitrogen or to the pressure reducer.

Slowly enter the nitrogen in the accumulator until reaching a pressure sli-

ghtly higher than that set (+ 10 ÷ 15%).

Close the cylinder and remove the connecting pipe from the equipment;

wait until the gas temperature has stabilized (2 hours) and calibrate the

pressure, discharging the excess gas.

Make sure that the gas pipe is not subject to losses and, if necessary,

use soap and water.

Tighten the protective cap manually.

Tightening torques in Nm

0.2 l 0.7-1.5 l 3 - 5 l 10-55 l

Fluid port ring nut 60 +10 100 +20 200 +50 450 +50

Bleed screw 3 +1 5 +1 5 +1 30 +10

Gas valve locknut 50 +10 80 +20 100 +20 150 +30

Filling valve V - VX - V2 - 30 +5 30 +5 30 +5

Valve insert V4 - 0.3 +0.,2 0.3 +0.2 0.3 +0.2

BLADDER ACCUMULATORS type AS and ASP

E 04-11

3.1

EPE ITALIANA s.r.l. - Viale Spagna,112 • 20093 Cologno Monzese (Mi) Italy

Tel.: +39 02 25459028 • Fax: +39 02 25 25459773 • E-mail: epeitaliana@epeitaliana.it • Internet: www.epeitaliana.it

11

3.1v

- Screw the slotted nut and centre the parts on the oil valve by using a

plastic hammer.

3.1w

- Bleed screw with sealing ring.

3.1x

- Mount the bleed screw with its sealing ring.

3.1y

- Tighten the hexagon nut SW1 on the gas valve.

3.1z

- Mount the filling valve.

Pre-charge

3.1zz

- Screw the pre-charge PC equipment on the gas valve.

- Connect the equipment to the cylinder of nitrogen or to the pressure

reducer with the inflation tube.

- Slowly enter the nitrogen in the accumulator until reaching a pressure

slightly higher than the set value (+ 10 ÷ 15%).

- Close the cylinder and remove the connecting pipe from the equipment.

- Wait until the gas temperature has stabilized (2 hours).

- Calibrate the pressure discharging the excess gas.

Make sure that the gas valve is not subject to losses and, if necessary,

use soap and water.

Tighten the protective caps manually.

Demolition and recycling of the accumulator

Before accumulator demolition or recycling, you should always discharge

completely the pre-charge pressure and remove the gas valve.

If needed, proceed decontaminating in relation to the fluid used prior to

demolition.

EPE ITALIANA s.r.l. - Viale Spagna,112 • 20093 Cologno Monzese (Mi) Italy

Tel.: +39 02 25459028 • Fax: +39 02 25 25459773 • E-mail: epeitaliana@epeitaliana.it • Internet: www.epeitaliana.it

BLADDER ACCUMULATORS type AS and ASP

E 04-11

3.1

12

3

.1.12 REPAIR TOOLS

3.1.12.1 BLADDER PULL ROD

The pull rod screwed to the gas valve of the bladder for easy assembly

i

nto shell during reassembly. Pull rod is complete with fitting for EPE gas

valve and 3 extension segments to accommodate all size of accumula-

tors.

Code for complete kit: B2505

Dimension

3.1aa

3.1.12.2 SPANNER WRENCH

Fits all standard size bladder accumulator. It is used to remove or install

lock nut on fluid port assembly.

0,7÷1,5 lt code 2506/58

3÷5 lt code 2506/68

10÷55 lt code 2506/105

Dimension

3.1ab

3

.1.12.3 LIFTING HOOK

To be used for the safe lifting of mounted accumulators:

For accumulators 0,7÷5 lt (M22x1,5) code B2507/2

For accumulators 10÷55 lt (M50x1,5) code B2507/5

F

or accumulators V4 (7/8” UNF) code B2507/7

Dimension

3.1ac

3.1.12.4 CORE TOOL

The core tool is used to remove and reinstall the valve core type V4.

Code B2508

Dimension

3.1ad

Reproduction is forbidden.

In the spirit of continuous improvement, our products may be changed.