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920.337.0234

BOSCH REXROTH
0531603500
Diaphragm Accumulators

Diaphragm accum.: 1,4 Litre-high press

$571.00

BOSCH REXROTH

MATERIAL:  0531603500

SUMMARY:  Diaphragm accum.: 1,4 Litre-high press

Due to extremely high demand, please call 920-337-0234 for availability

Function, section, symbol

General information

One of the main tasks of hydraulic accumulators is e.g. to accept certain volumes of pressurized liquids of a hydraulic system and to return them to the system if required.

As the liquid is pressurized, the hydraulic accumulators are treated like pressure vessel and must be designed for the max. operating overpressure considering the acceptance standards of the country of installation.

In most hydraulic systems, hydro-pneumatic (gas-charged) accumulators with separator element are used.

The difference between bladder, piston and diaphragm type accumulators lies in the type of separator element.

Hydraulic accumulators essentially consist of a fluid section and a gas section with a gas-tight separator element. The fluid section has a connection to the hydraulic circuit. During the pressure increase, the gas is compressed and liquid accepted in the hydraulic accumulator. When the pressure decreases, the compressed gas expands and displaces the accumulated fluid into the circuit.

Diaphragm type accumulator

Diaphragm type accumulators consist of a pressure-resistant steel vessel (1) which most commonly has a spherical to cylindrical form. Inside the accumulator, there is the separator element, namely a diaphragm (2) made of an elastic, flexible material (elastomer) with the closing button (3) and the plug screw (4). They correspond to directive 97/23/EC.

Symbol

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

1

Containers

2

Diaphragm

3

Closing button

4

Plug screw (gas filling screw)

5

Fluid connection

Ordering code

01

02

03

04

05

06

07

08

09

10

11

12

13

14

HAD

-

-

/

-

1

-

-

Device designation

01

Diaphragm type accumulators

HAD

Nominal capacity

02

See selection table

Maximum operating pressure

03

See selection table

Component series

04

Component series 10...19 (10...19: unchanged installation and connection dimensions)

1X

Component series 20...29 (20...29: unchanged installation and connection dimensions)

2X​

Preload pressure

05

0 to 250bar; e.g. 10bar

10

Port size for hydraulic fluid 1)

06

M14x1,5

Z04

M18x1,5

Z06

M22x1.5

Z08

G1/4

G02

G3/8

G03

G1/2

G04

G3/4

G05

G06

3/4-16UNF

U04

11/16-12UNF

U06

3/8NPTF

F02

1/2-14NPTF

F08

Type of mounting (oil port form)

07

Mounting cavity

A

Mounting cavity with external hexagon

C

Screw-in stud with internal thread

E

Screw-in stud

F

Screw-in stud M45x1.5 with internal thread

E5

Special versions on request

Gas port form

08

Standard version for 0538103012

1

Gas valve for 0538103011

2

cannot be refilled, welded on the gas side

4

Bladder material

09

NBR

N

ECO

E

IIR

I

FKM

F

Tank material

10

Steel

1

Surface of the tank inside

11

Steel

1

Galvanized steel

2

Surface of the connection side

12

Steel

1

Galvanized steel

2

Certification acceptance

13

Acceptance according to 97/23/EC

CE

Instructions for use

BA

14

Further details in the plain text e.g. SO variant

*​

1) Other versions available upon request.

Selection table

Nominal capacity

Maximum operating pressure

Component series

Certification acceptance

l

bar

0,075

250

1X

BA

0,16

250

1X

BA

0,35

210

1X

BA

0,5

160

1X

BA

250

2X

0,7

100

1X

BA

180

1X

250

1X

350

2X

1

200

1X

BA

1,4

140

1X

CE

250

1X

350

2X

2

100

1X

CE

250

1X

350

2X

2,8

70

1X

CE

250

1X

350

1X

3,5

250

1X

CE

350

1X

general

Nominal capacity

l

0.075 0.16 0.35 0.5 0.7 1 1.4 2 2.8 3.5

Weight

kg

0.65 1 1.3 1.6 2.6 3.5 4.9 4 5.5 14

kg

- - - 2 3.2 - 6.2 9.5 10 -

Design

Diaphragm type accumulator, welded

Installation position

Any, preferably with the fluid connection socket at the bottom

Mounting type

with clamps or via stud end connectors

Ambient temperature range1)

°C

-15…+65

Line connection

Screw-in thread
1) The admissible temperature range specified in the tank test is also decisive

hydraulic

Nominal capacity

VNenn

l

0.075 0.16 0.35 0.5 0.7 1 1.4 2 2.8 3.5

Effective gas volume

Veff

l

0.075 0.16 0.32 0.48 0.75 1 1.4 1.95 2.7 3.5

Maximum flow

qmax

l/min

10 10 40 40 40 40 40 60 60 60

Maximum operating pressure

pmax

bar

- - - - 100 - - - 70 -

bar

- - 210 160 180 - 140 100 - -

bar

250 250 207 207 250 200 250 250 250 250

bar

- - - 250 350 - 350 350 350 350

Maximum admissible pressure fluctuation range

Δpdyn

bar

- - - - 93 - - - - -

bar

- - 90 90 93 - 80 65 - -

bar

150 120 120 120 140 115 140 140 130 130

bar

- - - 100 130 - 130 130 130 130

Hydraulic fluid1)

Hydraulic oil according to DIN51524

Hydraulic fluid temperature range

NBR

°C

-10…+801)2)

ECO

°C

-35…+80
1) Other hydraulic fluids upon request.
2) The admissible temperature range specified in the tank test is also decisive

pneumatic

Charging gas

use only nitrogen!

Usable hydraulic fluids

When selecting the accumulator design, you have to observe the following, unbinding information with regard to hydraulic fluid, bladder and/or diaphragm material and admissible temperature range.

Warranty claims cannot be derived from these recommendations. For other hydraulic fluids and temperatures, please contact us.

Hydraulic fluids

Temperature range

Material

Mineral oils

-10…+80°C

NBR

-35…+80°C

ECO

HFA, HFB 1)

+5…+50°C

NBR

HFC

-10…+60°C

NBR, IIR

HFD 2)

-10…+60°C

IIR

-10…+80°C

FKM

Water 1)

+5…+50°C

NBR

Diesel, heating fuel

-10…+50°C

NBR

Heavy heating fuel

-10…+100°C

FKM

Regular gasoline

-10…+40°C

NBR

Premium gasoline

-10…+40°C

FKM

Kerosene

-10…+40°C

NBR

1) Possible special version for vessel and connection parts
2) Consultation with exact specification of the hydraulic fluid
NBR ‒ Acrylonitrile-butadiene rubber (Perbunan)
FKM ‒ Fluorocarbon rubber
IIR ‒ Butyl rubber
ECO ‒ Epichlorhydrin rubber

For applications outside these parameters, please consult us!

Calculation

Pressures

For the calculation of an accumulator, the following pressures are of significance:

p0 = gas precharge pressure (at room temperature and drained fluid chamber)

p0(t) = gas precharge pressure (at operating temperature)

p1 = minimum operating pressure

p2 = maximum operating pressure

(pm = average operating pressure)

To achieve the best possible utilization of the accumulator capacity and a long service life, it is recommended that the following values be adhered to:

p0, tmax≈0,9p1(1)

The highest hydraulic pressure should not exceed the quadruple of the precharge pressure; otherwise, the elasticity of the diaphragm is overstressed and excessive variations in the compression result in strong heating up of the gas.

The smaller the difference between p1 and p2 the longer is the service life of the diaphragm. However, this also reduces the degree of utilization of the corresponding maximum accumulator capacity.

Diaphragm-type accumulators

p2≤4•p0(2)

On request

p2≤8•p0

Note!

Filling piece in diaphragm-type accumulators

To achieve an increased pressure ratio (p0:p2>1:4) in the accumulator, a filling piece can be installed on the gas side of the accumulator.

This reduces the usable gas volume V1, but the diaphragm is protected against impermissible deformation.

Oil volume

Pressures p0…p2 determine gas volumes V0…V2.

Here, V0 is also the nominal capacity of the accumulator.

The available oil volume V corresponds to the difference beween gas volumes V1 and V2:

ΔV≤V1-V2(3)

The gas volume, which is variable within a pressure differential, is determined by the following equations:

a) In the case of isothermal changes of state of gases, that is, when the gas buffer changes so slowly that enough time is available for a complete heat exchange between the nitrogen and its surroundings and the temperature therefore remains constant, the following is valid:

p0•V0=p1•V1=p2•V2(4.1)

b) In the case of an adiabatic change of state, that is, with a rapid change of the gas buffer, in which the temperature of the nitrogen changes as well, the following is valid

p0•Vχ0=p1•Vχ1=p2•Vχ2(4.2)

χ=ratio of the specific heat of gases (adiabatic exponent), for nitrogen=1.4

In practice, changes in state rather follow adiabatic laws. Charging is often isothermal, discharging adiabatic.

Taking account of equations (1) and (2), ΔV is 50% to 70% of the nominal accumulator capacity. The following can be applied as a rule of thumb:

V0=1.5…3xΔV

Calculation diagram

To allow a determination on the basis of a graphic representation, the formulas (4.1) and (4.2) were translated into diagrams. Depending on the task at hand, the available oil volume, the accumulator size or the pressures can be established.

Correction factors Ki and Ka

Equations (4.1) and (4.2) are only valid for ideal gases. In the characteristics of real gases, significant deviations can be observed at operating pressures above 200bar, which must be taken into account by applying correction factors. These are shown on the following diagrams. The correction factors which are to be multiplied by the ideal withdrawal volume ΔV are within the range of 0.6…1.

Application of the calculation diagrams

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Adiabatic ΔVreal=ΔVidealxKa

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Isothermal state changes p0=1…90bar

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Isothermal state changes p0=100…300bar

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Adiabatic state changes p0=1…90bar

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Adiabatic state changes p0=100…300bar

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Application, mode of operation

Applications

Various applications exist for hydro-pneumatic accumulators:

Energy storage in order to save pump drive power in intermittent operation systems. Energy reserve for emergencies, e.g. upon failure of the hydraulic pump. Compensation of leakage losses. Impact and vibration absorption in case of periodic vibrations. Volume compensation in case of pressure and temperature changes. Suspension element for vehicles. Shock absorption with mechanical shocks.

Mode of operation

Fluids are almost incompressible and therefore cannot store pressure energy. Hydro-pneumatic Rexroth accumulators use the compressibility of a gas for fluid storage. Only neutral gases may be used. Usually “nitrogen” class 4.0.

N2 99.99 vol. %

O2 50 vpm

H2O approx. 30 vpm.

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Dimensions: 70…250bar

Dimensions in mm

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

1

Gas port form „1“

2

Lettering

Type

Volume

Ød

h

L

M

N

Mass

l

mm

mm

mm

mm

mm

kg

HAD0,075 0.075 64 91 20 21.5 12 0.65
HAD0,16 0.16 75 99.5 20 24 12 1
HAD0,35 0.35 92 114 22 33 18 1.3
HAD0,5 0.5 103 127 22 - - 1.6
HAD0,5 0.5 106 130 20 27 12 2
HAD0,7 0.7 121 144 22 33 18 2.6
HAD0,7 0.7 123.6 144 22 33 18 3.2
HAD1,0 1 136 158 22 33 18 3.5
HAD1,4 1.4 147 169 22 33 18 4.9
HAD1,4 1.4 152 173 22 33 18 6.2
HAD2,0 2 144 218 22 33 18 4
HAD2,0 2 155 229 22 33 18 9.5
HAD2,8 2.8 160 247 21 33 18 5.5
HAD2,8 2.8 174 247 21 33 18 10
HAD3,5 3.5 174 285 21 33 18 14

Dimensions of standard types: 160…250bar; 0,075…0,5l

Dimensions in mm

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Ordering code/type

Volume

Part number

Ød

h

k

l

mm

mm

HAD0,075-250-1X/2Z04F-1N111-BA 0.075 R901183242 65.5 112.5 M14x1,5
HAD0,16-250-1X/2Z06F-1N111-BA 0.16 R901183248 76.5 123.5 M18x1,5

Dimensions in mm

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Ordering code/type

Volume

Part number

Ød

h

k

l

mm

mm

HAD0,35-210-1X/2Z06C-1N111-BA 0.35 R901183250 94.3 136 M18x1,5
HAD0,5-160-1X/2Z06C-1N111-BA 0.5 R901183251 104.8 149 M18x1,5
HAD0,5-250-2X/2Z06C-1N111-BA 0.5 R901183253 108.5 152 M18x1,5

Dimensions of standard types: 100…250bar; 0,7…1,4l

Dimensions in mm

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Ordering code/type

Volume

Part number

Ød

h

k

l

mm

mm

HAD0,7-100-1X/2G04E-1N111-BA 0.7 R901164364 118.8 172 G1/2
HAD0,7-210-1X/2G04E-1N111-BA 0.7 R901164365 123.5 177 G1/2
HAD1,0-200-1X/2G04E-1N111-BA 1 R901164367 138.5 191 G1/2
HAD1,4-140-1X/2G04E-1N111-CE 1.4 R901164368 149.6 202 G1/2
HAD1,4-250-1X/2G04E-1N111-CE 1.4 R901164369 152 206 G1/2

Dimensions of standard types: 100…250bar; 2…3,5l

Dimensions in mm

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Ordering code/type

Volume

Part number

Ød

h

k

l

mm

mm

HAD2,0-100-1X/2G05E5-1N111-CE 2 R901164371 147.2 258 G3/4
HAD2,0-250-1X/2G05E5-1N111-CE 2 R901164372 158.6 269 G3/4
HAD2,8-250-1X/2G05E5-1N111-CE 2.8 R901164374 177.5 286 G3/4
HAD3,5-250-1X/2G05E5-1N111-CE 3.5 R901164376 177.5 325 G3/4

Dimensions of US standard types: 207…250bar; 0,075…0,35l

Dimensions in mm

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Ordering code/type

Volume

Part number

Ød

h

k

l

mm

mm

HAD0,075-250-1X/0U12C-2N111-USA 0.075 0531610632 65.5 125.8 9/16-18UNF-2B
HAD0,16-250-1X/0U12C1-2N111-USA 0.16 0531600611 76.5 132.3 9/16-18UNF-2B

Dimensions in mm

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Ordering code/type

Volume

Part number

Ød

h

k

l

mm

mm

HAD0,35-207-1X/0U04A-2N111-USA 0.35 0531601572 96.5 150.5 3/4-16UNF-2B

Dimensions in mm

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Ordering code/type

Volume

Part number

Ød

h

k

l

mm

mm

HAD0,7-207-1X/0U04C-2N111-USA 0.7 0531602588 128.5 186 3/4-16UNF-2B
HAD1,4-207-1X/0U04C-2N111-USA 1.4 0531603501 156.5 212.8 3/4-16UNF-2B
HAD2,0-207-1X/0U04C-2N111-USA 2 0531623500 156.5 265.8 3/4-16UNF-2B
HAD2,8-207-1X/0U04C-2N111-USA 2.8 0531613503 175.5 282.5 3/4-16UNF-2B

Dimensions of standard types: 350bar; 0,7…2l

Dimensions in mm

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Ordering code/type

Volume

Part number

Ød

h

k

Mass

l

mm

mm

kg

HAD0,7-350-2X/2G04E-1N111-BA 0.7 R901164366 128.5 184 E 4
HAD1,4-350-2X/2G04E-1N111-CE 1.4 R901164370 156 209 E 7
HAD2,0-350-2X/2G05E5-1N111-CE 2 R901164373 156 269 E5 9.5

Dimensions of standard types: 350bar; 2,8 and 3,5l

Dimensions in mm

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Ordering code/type

Volume

Part number

Ød

h

Mass

l

mm

mm

kg

HAD2,8-350-1X/2G05E5-1N111-CE 2.8 R901164375 180 285 13
HAD3,5-350-1X/2G05E5-1N111-CE 3.5 R901164377 180 325 16

Commissioning, maintenance

Notice for commissioning

Charging pressure

Diaphragm accumulators are usually delivered in condition ready for operation. The charging pressure (p0) is engraved on the accumulator housing.

Charging gas

Hydraulic accumulators must only be filled with nitrogen of class 4.0, pure N2 content of 99.99 vol. %.

Admissible operating temperature

In “standard version”, Bosch Rexroth hydraulic accumulators are suitable for operating temperatures of –10…+80°C. Please contact us for deviating temperatures.

Installation position

Diaphragm accumulators may be installed in any installation position. Above the gas valve, an installation space of 200mm must be provided for testing and charging devices.

Fastening

When mounting the accumulator, make sure that possible forces, such as the ones created by vibrations or acceleration specific for that application, are absorbed safely. When using several mounting points, avoid stress caused by operational, elastic deformations or temperature expansions.

Bosch Rexroth offers corresponding holding clamps (see “Accessories”).

Charging the accumulator

Use the Bosch Rexroth charging and test device to charge the accumulator (see “Accessories”). Refer to the information given in operating instructions 1 539 929 010 for details.

Notice

The pre-filling pressure will change with the gas temperature. After charging or draining nitrogen, wait with the check of the gas pressure until the temperature balance has been completed.

Maintenance

General information

After having been charged with gas, Bosch Rexroth accumulators are almost maintenance-free.

To guarantee a fault-free operation and a long life cycle, however, the following maintenance work must be carried out:

Inspection of the preset gas pressure Inspection of the safety equipment, fittings Inspection of the line connections Inspection of accumulator fixation.

Inspection of the gas filling pressure

Test intervals

After commissioning the accumulator, the charging pressure must be checked at least once in the first week. If no gas losses are detected, inspect for the second time after 3 months. If no pressure change could be determined again, annual inspections are sufficient.

Measurements on the fluid side

Connect pressure gauge via the line with the accumulator. Alternatively, connect the pressure gauge directly to the bleed port.

Procedure:

Fill the accumulator with hydraulic fluid. Close the shut-off device (5). Drain the hydraulic fluid slowly (temperature balance) by opening the safety valve (2). Observe the pressure gauge (3) during the draining process. As soon as the charging pressure has been reached in the accumulator, the pointer drops to zero abruptly.

If variations are measured, check whether:

pipelines, fittings are not leaking. Whether they can be attributed to different ambient or gas temperatures.

Only when no error can be determined at this point, the accumulator needs to be checked.

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Adapter for size 20 blocks

Connection A (accumulator)

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Accumulators

Block

D1

D2

ØD3

Part number

mm

M22x1.5 M33x2 12 1 533 359 012
M18x1,5 8 1 533 359 013
G1/2ISO228 1 533 359 034

Holding clamps, selection table

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Type

Clamp type

Part number

HAD0,075

HY/VGBKS 62– 65

1551316024

HAD0,35

HY/VGBKS 92–97

1531316017

HAD0,50

HY/VGBKS 101–111

1531316018

HAD0,75

HY/VGBKS 119–128

1531316015

HAD0,7

HY/VGBKS 128–136

R901073992

HAD1,0

HY/VGBKS 135–145

1531316019

HAD1,4

HY/VGBKS 145–155

1531316016

HAD2,0/100

HY/VGBKS 135–145

1531316019

HAD2,0/250

HY/VGBKS 145–155

1531316016

HAD2,8/70

HY/VGBKS 160–170

1531316022

HAD2,8–3,5

HY/VGBKS 170–180

1531316020

Charging and test device

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Test case, complete

Part number

Bladder

0538103011

Diaphragm

0538103012

Bladder and diaphragm consisting of:

0538103014

Case

R901070141

Charging and test valve

Bladder

0538103005

Diaphragm

0538103006

Pressure gauge 0…250bar

1537231001

Hose l = 2,5m with adapter piece form "D"

1530712005

Accessory parts to be ordered separately

Part number

Pressure gauge 0…25bar

R900033955

Pressure gauge 0…60bar

1537231002

Pressure gauge 0…400bar

1537231005

Adapter piece

Form "F"

1533391010

Form "GB"

1533391011

Form "USA"

1533391012

Form "KR"

1533391013

Form "J"

1533391014

Form "RUS"

1533391015

Hose l = 5m with transition socket form “D”

1530712006

Dimensions of charging and test valve

1 valve body with check valve, discharge valve, pressure gauge connection, and gas hose connection.

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

1

Spare part, Material no. 1537410065

2

Adapter see "Adapter from nitrogen bottle..."

Adapter for nitrogen bottle to cap nut
Dimensions in mm

Material no. 1533391010

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Material no. R900216133

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Material no. 1533391013

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Material no. 1533391011

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Material no. 1533391012

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Material no. 1533391015

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Adapter for nitrogen bottle to cap nut
Dimensions in inches

Material no. 1533391010

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Material no. R900216133

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Material no. 1533391013

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Material no. 1533391011

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Material no. 1533391012

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Material no. 1533391015

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Country

Part number

1​533391010

1533391011

1533391012

R900216133

1533391013

1​533391015

Brazil

x

Bulgaria

x

France

x

Greece

x

Great Britain

x

India

x

Japan

x

Canada

x

Korea North

x

Korea South

x

Malaysia

x

Romania

x

Russia

x

Spain

x

Saudi Arabia

x

Singapore

x

Turkey

x

USA

x

Other countries on request.

Safety instructions for hydraulic accumulators

For hydraulic accumulators, the regulations applicable at the place of installation prior to commissioning and during operation have to be observed.

The machine end-user will have sole responsibility for complying with existing provisions.

General information for hydraulic accumulators in hydraulic systems can be found in EN982.

Keep all documents included in the delivery in a safe place; they will be required by the expert in recurring tests.

Warning!

Do not perform welding and soldering or any other mechanical works at the accumulator tank!

Explosion hazard due to welding and soldering works! Danger of bursting and loss of the operating permit in case of mechanical processing!

Do not charge hydraulic accumulators with oxygen or air. Explosion hazard!

Before working at hydraulic systems, depressurize the system and secure it against restarting!

Improper assembly may result in serious accidents!

The accumulator may only be commissioned by qualified personnel.

Safety equipment

In the Federal Republic of Germany, equipment, place of installation and operation of hydraulic accumulators are regulated by the “Technical rules Pressure vessels” (TRB). They require the following safety equipment:

1 Equipment against excessive pressure (type-examination tested)

2 Discharge device

3 Pressure measurement device

4 Test pressure gauge connection

5 Shut-off device

Option:

6 Electro-magnetically operated discharge device

7 Safety equipment against excessive temperature

This safety equipment is combined in a compact Bosch Rexroth safety and shut-off block.

technical illustration-0531603500-Diaphragm accum.: 1,4   Litre-high press

Legal provisions

Hydraulic accumulators are pressure vessels and subject to the application national provisions and/or regulations valid at the place of installation. In Germany, the Ordinance on Industrial Safety and Health (BetrSichV) applies.

Special regulations are to be observed in shipbuilding, aircraft construction, mining, etc.

Design, production and testing are effected according to the data sheets according to AD 2000. Installation, equipment and operation are regulated by the "Technical rules Pressure vessels" (TRB).

Tank classes and tests in Germany

According to this German ordinance, pressure vessels are classified into categories according to their content in l , the admissible operating overpressure in bar and the pressure content product p x l . Depending on the category, tests are prescribed.

The following table provides an overview:

Vessel class

Initial test at the manufacturer‘s end

Acceptance test at the operator‘s end

Recurring inspections

Internal

Pressure

External

II​

p>25bar; p•L≤200

III​

p>1bar; p•L>200≤1.000

X

X

IV​

p>1bar; p•L>1.000

X

X

X

51) / 102)

X

101)

X

21)
1) Years
2) Years with non-corroding fluids
X by expert
◯ by specialist
Notice!
All tank classes are to be secured by means of a pressure relief valve according to directive 97/23/EC.