Translation of original instructions

EB 2559 EN

Type 2357-3 with non-return unit at port C · Ports A and B with soldering nipple with ball-type bushing

Type 2357-3 Pressure Build-up RegulatorSelf-operated Pressure Regulators

Edition March 2021

Note on these mounting and operating instructions

These mounting and operating instructions assist you in mounting and operating the device safely. The instructions are binding for handling SAMSON devices.

Î For the safe and proper use of these instructions, read them carefully and keep them for later reference.

Î If you have any questions about these instructions, contact SAMSON‘s After-sales Service (aftersalesservice@samsongroup.com).

The mounting and operating instructions for the devices are included in the scope of delivery. The latest documentation is available on our website at www.samsongroup.com > Service & Support > Downloads > Documentation.

Definition of signal words

Hazardous situations which, if not avoided, will result in death or serious injury

Hazardous situations which, if not avoided, could result in death or serious injury

Property damage message or malfunction

Additional information

Recommended action

DANGER!

WARNING!

NOTICE!

Note

Tip

2 EB 2559 EN

Contents

EB 2559 EN 3

1 Safety instructions and safety measures .........................................................51.1 Notes on possible severe personal injury .........................................................81.2 Notes on possible personal injury ...................................................................91.3 Notes on possible property damage ..............................................................102 Markings on the device ...............................................................................122.1 Nameplate ..................................................................................................122.2 Material number ..........................................................................................132.2.1 Type 2357-3 Regulator .................................................................................133 Designandprincipleofoperation ................................................................143.1 Technical data .............................................................................................164 Measuresforpreparationbeforeinstallation ................................................204.1 Unpacking ..................................................................................................204.2 Transport, lifting and storage ........................................................................204.2.1 Storage .......................................................................................................215 Mounting position .......................................................................................215.1 Preparation for installation ............................................................................215.2 Checking the installation conditions ...............................................................225.2.1 Mounting position ........................................................................................225.2.2 Shut-off valves .............................................................................................226 Start-upandoperation ................................................................................246.1 Start-up .......................................................................................................246.2 Installing the regulator ..................................................................................246.3 Operation ...................................................................................................256.4 Starting up the plant .....................................................................................256.5 Adjusting the set point ..................................................................................267 Servicing.....................................................................................................277.1 Replacing the set point springs ......................................................................297.2 Tightening torques ........................................................................................307.3 Lubricants and sealants ................................................................................307.4 Prepare the regulator for return shipment .......................................................317.5 Ordering spare parts and operating supplies .................................................318 Malfunctions ...............................................................................................329 Decommissioningandremoval ....................................................................339.1 Decommissioning .........................................................................................339.2 Disposal ......................................................................................................33

Contents

4 EB 2559 EN

10 Annex.........................................................................................................3410.1 After-sales service ........................................................................................3410.2 Spare parts and accessories .........................................................................3410.3 Certificates ..................................................................................................34

EB 2559 EN 5

Safety instructions and safety measures

1 Safety instructions and safety measuresIntended useThe SAMSON Type 2357-3 Pressure Regulator is designed to keep the pressure (either downstream pressure p2 or upstream pressure P1, depending on the version) constant to the adjusted set point, especially in cryogenic plants. Liquids, gases and vapors in processing and industrial plants can be controlled by the regulator.The regulators are designed to operate under exactly defined conditions (e.g. operating pres-sure, process medium, temperature). Therefore, operators must ensure that the regulators are only used in operating conditions that meet the specifications used for sizing the devices at the ordering stage. In case operators intend to use the regulators in other applications or conditions than specified, contact SAMSON.SAMSON does not assume any liability for damage resulting from the failure to use the de-vice for its intended purpose or for damage caused by external forces or any other external factors.

Î Refer to the technical data and nameplate for limits and fields of application as well as possible uses.

ReasonablyforeseeablemisuseThe regulators are not suitable for the following applications: − Use outside the limits defined during sizing and by the technical data − Use outside the limits defined by the accessories mounted on the regulator

Furthermore, the following activities do not comply with the intended use: − Use of non-original spare parts − Performing service and repair work not described in these instructions

QualificationsofoperatingpersonnelThe regulator must be mounted, started up, serviced and repaired by fully trained and quali-fied personnel only; the accepted industry codes and practices are to be observed. Accord-ing to these mounting and operating instructions, trained personnel refers to individuals who are able to judge the work they are assigned to and recognize possible hazards due to their specialized training, their knowledge and experience as well as their knowledge of the appli-cable standards.

6 EB 2559 EN

Safety instructions and safety measures

PersonalprotectiveequipmentWe recommend checking the hazards posed by the process medium being used (e.g. u GESTIS (CLP) hazardous substance database).

Î Provide protective equipment (e.g. safety gloves, eye protection) appropriate for the pro-cess medium used.

Î Wear hearing protection when working near the regulator. Î Check with the plant operator for details on further protective equipment.

RevisionsandothermodificationsRevisions, conversions or other modifications of the product are not authorized by SAMSON. They are performed at the user's own risk and may lead to safety hazards, for example. Fur-thermore, the product may no longer meet the requirements for its intended use.

WarningagainstresidualhazardsTo avoid personal injury or property damage, plant operators and operating personnel must prevent hazards that could be caused in the regulator by the process medium, the operating pressure or by moving parts by taking appropriate precautions. They must observe all hazard statements, warning and caution notes in these mounting and operating instructions, especially for installation, start-up and service work.We also recommend checking the hazards posed by the process medium being used (e.g. u GESTIS (CLP) hazardous substance database).

Î Observe safety measures for handling the device as well as fire prevention and explosion protection measures.

Safety featuresThe Type 2357-3 Regulator does not have any special safety features. When relieved of pressure, the regulator is opened by the force of the set point springs.

ResponsibilitiesoftheoperatorThe operator is responsible for proper operation and compliance with the safety regulations. Operators are obliged to provide these mounting and operating instructions as well as the referenced documents to the operating personnel and to instruct them in proper operation. Furthermore, the operator must ensure that operating personnel or third persons are not ex-posed to any danger.

EB 2559 EN 7

Safety instructions and safety measures

ResponsibilitiesofoperatingpersonnelOperating personnel must read and understand these mounting and operating instructions as well as the referenced documents and observe the specified hazard statements, warnings and caution notes. Furthermore, the operating personnel must be familiar with the applicable health, safety and accident prevention regulations and comply with them.

ReferencedstandardsandregulationsThe regulators comply with the requirements of the European Pressure Equipment Directive 2014/68/EU. Regulators with a CE marking have an EU declaration of conformity, which includes information about the applied conformity assessment procedure. This EU declaration of conformity is included in the Annex of these instructions (see section 10.3).According to the ignition risk assessment performed in accordance with EN 13463-1:2009, section 5.2, the non-electrical regulators do not have their own potential ignition source even in the rare incident of an operating fault. As a result, they do not fall within the scope of Di-rective 2014/34/EU.

Î For connection to the equipotential bonding system, observe the requirements specified in section 6.4 of EN 60079-14 (VDE 0165 Part 1).

Referenced documentationThe following documents apply in addition to these mounting and operating instructions:

− Manuals

Oxygenmanual u H 01

− Data sheets

For example: Sparepartsandaccessories·Self-operatedregulatorsforcryogenicmedia u T 2570

− Mounting and operating instructions as well as data sheets for additional components (e.g. shut-off valves, pressure gauges etc.).

8 EB 2559 EN

Safety instructions and safety measures

1.1 NotesonpossibleseverepersonalinjuryDANGER!

Riskofburstingintheregulator.Regulators and pipelines are pressure equipment. Impermissible pressure or improper opening can lead to regulator components bursting.

Î Observe the maximum permissible pressure for regulator and plant. Î Before starting any work on the regulator, depressurize all plant sections concerned as well as the regulator.

Î Drain the process medium from all the plant sections concerned as well as the reg-ulator.

Î Wear personal protective equipment.

EB 2559 EN 9

Safety instructions and safety measures

1.2 NotesonpossiblepersonalinjuryWARNING!

DamagetohealthrelatingtotheREACHregulation.If a SAMSON device contains a substance which is listed as being a substance of very high concern on the candidate list of the REACH regulation, this circumstance is indi-cated on the SAMSON delivery note.

Î Information on safe use of the part affected u http://www.samsongroup.com/reach-en.html.

Riskofpersonalinjuryduetoresidualprocessmediumintheregulator.While working on the regulator, residual process medium can escape and, depending on its properties, may lead to personal injury, e.g. (chemical) burns.

Î If possible, drain the process medium from all the plant sections concerned and the regulator.

Î Wear protective clothing, safety gloves and eyewear.

Riskofburninjuriesduetohotorcoldcomponentsandpipelines.Depending on the process medium, regulator components and pipelines may get very hot or cold and cause burn injuries.

Î Allow components and pipelines to cool down or heat up. Î Wear protective clothing and safety gloves.

10 EB 2559 EN

Safety instructions and safety measures

1.3 NotesonpossiblepropertydamageNOTICE!

Riskofregulatordamageduetoincorrectlyattachedslings. Î Do not attach load-bearing slings to the actuator housing.

Riskofregulatordamageduetounsuitablemediumproperties.The regulator is designed for a process medium with defined properties.

Î Only use the process medium specified for sizing.

Riskofregulatordamageduetocontamination(e.g.solidparticles)inthepipeline.The plant operator is responsible for cleaning the pipelines in the plant.

Î Flush the pipelines before start-up.

Riskofregulatordamageduetotheuseofunsuitablelubricants.The lubricants to be used depend on the regulator material. Unsuitable lubricants may corrode and damage the surface.

Î Only use lubricants approved by SAMSON.When in doubt, consult SAMSON.

Riskofleakageandregulatordamageduetoexcessivelyhighorlowtighteningtorques.Observe the specified torques on tightening regulator components. Excessively tight-ened torques lead to parts wearing out quicker. Parts that are too loose may cause leakage.

Î Observe the specified tightening torques (see section 7.2).

EB 2559 EN 11

Safety instructions and safety measures

1.3 NotesonpossiblepropertydamageNOTICE!

Riskofregulatordamageduetotheuseofunsuitabletools.Certain tools are required to work on the regulator.

Î Only use tools approved by SAMSON.When in doubt, consult SAMSON.

SAMSON's After-sales Service can support you concerning lubricant, tightening torques and tools approved by SAMSON.

Note

12 EB 2559 EN

Markings on the device

2 Markings on the device

2.1 Nameplate

1 Valve type/Date of manufacture

2 Set point range/Default setting of set point

3 Material number/Manufacturing index

4 Serial number5 Customer-specific details

6 CE marking/EAC marking

7

Marking for special version with reinforced closing spring for process medium in the liquid phase

7

12

34

56

AB

C

Fig. 1: Nameplate of Type 2357-3

EB 2559 EN 13

Markings on the device

2.2 Materialnumber

2.2.1 Type 2357-3RegulatorSpecifying the configuration ID, you can con-tact us to find out which material is used. The configuration ID is specified on the name-plate (3). For more details on the nameplate, see section 2.1.

14 EB 2559 EN

Designandprincipleofoperation

3 Designandprincipleofoper-ation

See Fig. 2.The regulator consists of a valve with three ports (A, B and C), a spring-loaded operat-ing bellows (3) with set point adjuster (10) and a tubular plug (2.2).The process medium flows from port A to port B in the Type 2357-3 Pressure Regulator used as a build-up pressure regulator with safety function.The regulator is open when relieved of pres-sure. The pressure downstream of the regula-tor is transmitted to the operating diaphragm (3). The positioning force produced by this pressure moves the pressure build-up plug (2.1), which is firmly attached to the plug sleeve, depending on the spring force adjust-able at the set point adjuster (10). The regu-lator closes as soon as the downstream pres-sure has assumed the adjusted set point.Functioning as a pressure build-up regulator, the regulator also operates as a safety valve for the pressure chamber upstream of port A. When the pressure rises above the set point by approx. 5 bar, the positioning force overcomes the force of the closing spring (16), causing the pressure build-up plug (2.1) to open and the pressure is relieved to ports B and C.Functioning as an excess pressure valve, the medium flows from port B to C. The tubular plug seals off the operating bellows when there is no pressure drop across port B and C. The pressure at port B acts on the operat-ing bellows (3). The positioning force pro-

duced by this pressure opposes the adjust-able spring force of the set point spring (8) and opens the tubular plug (2.2) when the pressure rises above the set point by approx. 0.5 bar. The pressures are equalized and the medium escapes through the inside of the tu-bular plug over port C.

As an excess pressure valve, the regulator can be optionally equipped with a non-re-turn unit (12). It prevents the medium from flowing back to port C and allows mainte-nance work to be performed on the regula-tor without having to empty the tank first.

EC type examinationAn EC type examination according to the Pressure Equipment Directive 97/23/EC, Module B has been performed on the regu-lators.

EB 2559 EN 15

Designandprincipleofoperation

10

9

7

8

3

17

13

2.2

2.1

4.2

12

16

13

17

1

1411

4.1

17

4

5

C

BA

Type 2357-3

1 Valve body2.1 Pressure build-up plug2.2 Tubular plug3 Operating bellows4 Coupling nut

4.1 Seal (body cover)4.2 Seal (top section of body)5 Screw plug7 Spring plate8 Set point spring9 Housing cover

10 Set point adjuster (hexagon socket, SW 5)

11 Lock nut (SW 17)12 Non-return unit (accessories)13 Filter14 Body screws16 Closing spring

17Coupling nut for soldering nipple with ball-type bushing (accessories)

Fig. 2: Design and principle of operation

16 EB 2559 EN

Designandprincipleofoperation

3.1 TechnicaldataThe regulator's nameplate contains informa-tion on the regulator version (see sec-tion 2.1).

ProcessmediumandscopeofapplicationThe regulator is designed to keep the pres-sure constant to the adjusted set point, espe-cially in cryogenic plants.

The regulator functions as a pressure build-up regulator with safety function (direction of flow from A to B, closing) or as an excess pressure valve (direction of flow from B to C, opening).

− Suitable for cryogenicgasesandliquidsaswellasotherliquids,gasesandva-pors

− Min. temperature –196 °C − Max. temperature 200 °C − Set points from 2to40 bar − Nominal size DN 25/20 − Pressure rating PN 40

Temperature rangeDepending on how the regulator is config-ured, it can be used up to temperatures of –196 to 200 ° (Table 1).

Noise emissionSAMSON is unable to make general state-ments about noise emission as it depends on the valve version, plant facilities and process medium.

Risk of hearing loss or deafness due to loud noise.Wear hearing protection when working near the regulator.

Risk of injury and property damage due to high pressure in the plant.A suitable overpressure protection must be installed on site in the plant section.

DimensionsandweightsTable 1 provides a summary of the weights. The lengths and heights are shown in the di-mensional drawings on page 19 and 18.

WARNING!

WARNING!

EB 2559 EN 17

Designandprincipleofoperation

Table 1: Technical data · All pressures in bar (gauge)

Type 2357-3 – Process medium in the gas phase –

2357-3 – Special version in the liquid phase –

Pressure rating PN 40

KVS coefficient 3.2

Set point range 2 to 10 bar · 8 to 26 bar · 25 to 40 bar

Safety function 5 bar above the set point 12 bar above the set point

Excess pressure function 0.5 bar above the set point

Temperature range –196 to +200 °C

Weight, approx. 3.5 kg

Compliance ·

Table 2:Materials · Material numbers according to DIN ENType 2357-3

Body CC754S-GM (brass) 1.4404

Tubular plug 1.4301 1.4301

Plug 1.4301 ∙ PTFE soft seal

Bellows 1.4571

Set point spring Stainless steel 1.4310

Body gasket PTFE

Connec-tions

A, B M40x2 Welding ends 26.9 x 2

C M26 x 1.5 male thread

Non-return unit M40x2 M26x1.5

18 EB 2559 EN

Designandprincipleofoperation

Dimensions(inmm)

126

63

220

313

Ø 80

174

180

Type 2357-3 · Standard version with soldering nipple (accessories) and non-return unit (accessories)

Fig. 3: Dimensions

EB 2559 EN 19

Designandprincipleofoperation

Dimensions(inmm)

Ø80

Ø28M40 x 2

126

155

111

174

131Weld seam performed on site

Type 2357-3 · CrNi steel version with welding ends (accessories) and non-return unit (accessories)

Fig. 3: Dimensions

20 EB 2559 EN

Measuresforpreparationbeforeinstallation

4 Measures for preparation beforeinstallation

After receiving the shipment, proceed as fol-lows:1. Check the scope of delivery. Compare

the shipment received with the delivery note.

2. Check the shipment for transportation damage. Report any damage to SAMSON and the forwarding agent (refer to delivery note).

In the delivered state, the regulators are packed to be free of oil and grease for oxy-gen service.Do not open or remove the packaging until immediately before installation.

4.1 Unpacking

In the delivered state, the regulators are packed to be free of oil and grease for oxy-gen service.Do not remove the packaging until immedi-ately before installation.

Note

NOTICE!

Before installing the regulator, proceed as follows:1. Remove the packaging from the control-

ler.2. Dispose of the packaging in accordance

with the valid regulations.

4.2 Transport,liftingandstorage

Due to the low service weight, lifting equip-ment is not required to lift and transport the regulator (e.g. to install it into the pipeline).

Transport instructions − Protect the device against external influ-

ences (e.g. impact). − Do not open or remove the packaging

until immediately before installation. − Protect the device against moisture and

dirt. − Observe the permissible ambient tem-

peratures (see section Table 1).

EB 2559 EN 21

Mounting position

4.2.1 Storage

Risk of regulator damage due to improper storage. − Observe storage instructions. − Avoid long storage times. − Contact SAMSON in case of different stor-age conditions or long storage periods.

We recommend regularly checking the regu-lator and the prevailing storage conditions during long storage periods.

Storage instructions − Protect the regulator against external in-

fluences (e.g. impact). − Do not open or remove the packaging

until immediately before installation. − Protect the regulator against moisture

and dirt. Store it at a relative humidity of less than 75 %. In damp spaces, prevent condensation. If necessary, use a drying agent or heating.

− Make sure that the ambient air is free of acids or other corrosive media.

− The permissible storage temperature is between –20 and +65 °C.

− Do not place any objects on the regula-tor.

NOTICE!

Note

5 Mounting position

Explosion hazard due to the use of oil and grease in oxygen atmospheres!Make sure that the regulator is absolutely clean and free of oil and grease on installing it.

In the delivered state, the regulators are packed to be free of oil and grease for oxy-gen service. Do not open the packaging until immediately before installation.

5.1 PreparationforinstallationProceed as follows:

The plant operator is responsible for clean-ing the pipelines in the plant.

Î Check the regulator to make sure it is clean and not damaged.

Î Make sure the regulator is installed free of stress.

Î Flush and clean the pipeline thoroughly before installing the regulator.

Any impurities carried along by the process medium may impair the proper functioning of the regulator.

Î Check to make sure that the type desig-nation, valve size, material and pressure rating of the regulator match the plant

WARNING!

Note

Note

22 EB 2559 EN

Mounting position

conditions (size and pressure rating of the pipeline, medium temperature etc.).

5.2 Checkingtheinstallationconditions

5.2.1 Mounting position Î Install the regulator with the actuator housing suspended downward (with port C facing upward) in horizontal pipelines (see Fig. 4).

Î Make sure the correct direction of flow is used for the body design and the intend-ed use.Pressurebuild-upregulator with safety functionDirection of flow from port A to port B

Excesspressurevalve:Direction of flow from port B to port C

The ports A and B are marked on the body.

Î Install the regulator free of stress. Î Make sure that the regulator remains freely accessible after the plant has been completed.

Do not attach supports directly to the regula-tor.

NOTICE! NOTICE!

A B

C Standard mounting posi-tionFor gases, liquids and steam

Notpermissible

Notpermissible

Fig. 4: Mounting position

5.2.2 Shut-offvalvesInstall a hand-operated shut-off valve (6.1 and 6.2) both upstream of the strainer and downstream of the regulator to be able to shut down the plant for cleaning and mainte-nance and when the plant is not used for longer periods of time.

EB 2559 EN 23

Mounting position

To consumer, filling station etc.

_

10

11

1

9

7

8

6.2

45

6.1 3

B

C

A_

2

1 Cryogenic tank

2 Type 2357-3 Pressure Build-up Regulator

3 Non-return unit

4 Types 2357-1/-11 Pressure Reducing Valve

5 Type 2040 Temperature Monitor

6.16.2 Shut-off valves

7 Pressure build-up vaporizer

8 Final vaporizer

9 Media 5/Media 7 Level Meter

10 Safety valve

11Pressure protection by Type 2357-2 with special accessories

Fig. 5: Series 2357 Pressure Build-up Regulator with safety function for cryogenic service, schematic drawing

24 EB 2559 EN

Start-upandoperation

6.2 Installingtheregulator Î Refer to Fig. 5

1. Close the shut-off valves (6.1 and 6.2) in the pipeline while the valve is being in-stalled.

2. Take the regulator out of the packaging.3. Lift the regulator to the site of installation.

Observe the flow direction through the regulator. Markings on the regulator in-dicate the direction of installation.

4. Bolt the regulator to the pipeline free of stress.

5. Slowly open the shut-off valves in the pipeline after the regulator has been in-stalled.

6 Start-upandoperation

6.1 Start-up

Re

Risk of personal injury due to process me-dium escaping under pressure. − First start up the regulator after mounting all parts.

Explosion hazard due to the use of oil and grease in oxygen atmospheres!Make sure that the regulator is absolutely clean and free of oil and grease on installing it.

Risk of burn injuries due to hot or very cold components and pipelines.Depending on the process medium, regula-tor components and pipelines may get very hot or cold and cause burn injuries.Wear protective clothing and safety gloves.

Once installed in the pipeline, the regulator can be put into operation.

DANGER!

WARNING!

WARNING!

EB 2559 EN 25

Start-upandoperation

6.4 Startinguptheplant Î Refer to Fig. 5 Î Start up the regulator after mounting all parts.

Î Open the shut-off valves slowly prefera-bly starting from the upstream pressure side.

Î Fill the plant slowly with the process me-dium. Avoid pressure surges.

6.3 OperationThe regulator is ready for use when mount-ing and start-up have been completed.

Risk of burn injuries due to hot or very cold components and pipelines.Depending on the process medium, regula-tor components and pipelines may get very hot or cold and cause burn injuries.Wear protective clothing and safety gloves.

WARNING!

26 EB 2559 EN

Start-upandoperation

6.5 Adjustingthesetpoint Î Refer to Fig. 2

Every regulator is delivered with the set point listed in Table 3 already adjusted.Turn the set point adjuster (10) using Allen key (width across flats 5) to change the de-fault set point.6. Undo the lock nut (11).7. Determine the difference between the

fixed set point (Table 3) and the required set point. Turn the set point adjuster (10) the required amount of turns as specified in Fig. 6.Based on the default setting, any subse-quent change to the set point can be also be made by determining the required number of turns using the specifications listed in Table 3.

Turnthesetpointadjuster(10)clock-wise()toincreasethepressuresetpoint.

Turnthesetpointadjuster(10)counter-clockwise()toreducethepressuresetpoint.

8. Tighten the lock nut (11).

Set point adjuster screwed too tight.The regulator is blocked and the medium flow through it is restricted. Pressure regula-tion is no longer possible.Only screw the set point adjuster up to the point where the spring tension can still be felt.

NOTICE!

40

35

30

25

20

15

10

5

00 1 2 3 4 5 6 7 8 9 10 11 12

Set point range 25 to 40 bar

Set point range 8 to 26 bar

Set point range 2 to 10 bar

Set point in bar

Turns of the set point adjuster

Fig. 6: Adjustment diagram

Table 3: Set point adjustmentSet point range 2to10 bar 8to26 bar 25 to40 bar

Adjusted to ... 10 bar 10 bar 25 bar

Set point change per turn

0.8 bar 1.5 bar 3.2 bar

EB 2559 EN 27

Servicing

7 ServicingThe regulator does not require any mainte-nance. Nevertheless, it is subject to natural wear, particularly at the seat, plug and oper-ating bellows. Depending on the operating conditions, check the regulator at regular in-tervals to avoid possible malfunctions.

Î Check the filters in ports A and B for dirt and, if necessary, clean them.

Details on faults and how to remedy them can be found in Table 4.We recommend removing the regulator from the pipeline before performing any mainte-nance or service work.

Î While working on the regulator, refer to SAMSON Manual for oxygen u H 01.

Risk of bursting in pressure equipment.Regulators and pipelines are pressure equip-ment. Improper opening can lead to bursting of the regulator. − Before starting any work on the regulator, depressurize all plant sections concerned as well as the regulator. − Disconnect the control line. − Drain the process medium from all the plant sections concerned as well as the regulator. − Wear personal protective equipment.

DANGER!

Risk of personal injury due to residual pro-cess medium in the regulator.While working on the regulator, residual process medium can escape and, depending on its properties, may lead to personal in-jury, e.g. (chemical) burns.Wear protective clothing, safety gloves and eyewear.

Risk of burn injuries due to hot or cold com-ponents and pipeline.Regulator components and the pipeline may become very hot or cold. Risk of burn inju-ries. − Allow components and pipelines to cool down or heat up. − Wear protective clothing and safety gloves.

Process medium can escape uncontrolled on dismantling the regulator.Risk of cold burns!Allow the regulator to defrost before depres-surizing and draining it and remove it from the pipeline.

WARNING!

WARNING!

WARNING!

28 EB 2559 EN

Servicing

Risk of regulator damage due to excessively high or low tightening torques.Observe the specified torques on tightening regulator components. Excessively tightened torques lead to parts wearing out quicker. Parts that are too loose may cause leakage.Observe the specified tightening torques.

Risk of regulator damage due to incorrect servicing or repair.Service and repair work must be performed by trained staff only.

Risk of regulator damage due to the use of unsuitable tools.Only use tools approved by SAMSON.

Risk of regulator damage due to the use of unsuitable lubricants.Only use lubricants approved by SAMSON.

NOTICE!

NOTICE!

NOTICE!

NOTICE!

SAMSON's After-sales Service department can support you concerning lubricant, tightening torques and tools approved by SAMSON.

The regulator was checked by SAMSON be-fore it left the factory. − Certain test results (seat leakage and leak test) certified by SAMSON lose their validity when the regulator is opened. − The product warranty becomes void if service or repair work not described in these instructions is performed without prior agreement by SAMSON's After-sales Service. − Only use original spare parts by SAMSON, which comply with the original specifications.

SAMSON's After-sales Service department can support you in drawing up an inspection and test plan for your plant.

Note

Note

Tip

EB 2559 EN 29

Servicing

7.1 Replacingthesetpointsprings

Î Refer to Fig. 2

Risk of regulator damage due to excessively high or low tightening torques.Observe the specified torques on tightening regulator components. Excessively tightened torques lead to parts wearing out quicker. Parts that are too loose may cause leakage.Observe the specified tightening torques.

SAMSON's After-sales Service department can support you concerning lubricant, tightening torques and tools approved by SAMSON.

The set point ranges adjusted in the factory can be changed by changing the set point spring (8) and operating bellows (3).Data Sheet u T 2570 ∙ Spare parts and ac-cessories

Î While working on the regulator, refer to SAMSON Manual for oxygen u H 01.

NOTICE!

Note

Removing the set point spring1. Put the regulator out of operation (see

section 9.1).2. Remove the device from the pipeline3. Undo the lock nut (11).4. Completely relieve the tension from the

set point spring (8) by turning the set point adjuster (10) counterclockwise ().

5. Undo the screws (14).6. Remove the body cover (9), seal (4.1)

and spring plate (7).7. Take out the set point spring (8) and op-

erating bellows (3).

Mounting the set point spring8. Insert new set point spring (8) for the re-

quired set point range together with the operating bellows (3) into the valve body (1).

9. Replace the seal (4.1), spring plate (7) and body cover (9).

10. Fasten the housing cover with the screws (14). Observe the tightening torques specified in section 7.2.

11. Turn the set point adjuster (10) clockwise () up to the point where the springs tension can be slightly felt. If necessary, pre-adjust the new set point (see Fig. 6).

12. Install the regulator into the pipeline.13. Put the regulator into operation (see sec-

tion 6.1).

Change the nameplate and configuration ID after changing the set point range.

Note

30 EB 2559 EN

Servicing

7.2 Tighteningtorques Î Refer to Fig. 2

Item Part Widthacrossflats Tighteningtorquein Nm

4 Coupling nut SW 32 60

5 Screw plug SW 26 70

14 Screws SW 10 7

17

Coupling nut for soldering nipple with

ball-type bushing (accessories)

SW 49 100

7.3 Lubricantsandsealants

SAMSON's After-sales Service can support you concerning lubricants and sealants ap-proved by SAMSON.

Note

EB 2559 EN 31

Servicing

7.4 Preparetheregulatorforreturn shipment

Defective regulators can be returned to SAMSON for repair. Proceed as follows to return devices to SAMSON:1. Put the regulator out of operation (see

section 9.1).2. Decontaminate the regulator. Remove

any residual process medium.3. Fill in the Declaration on Contamination.

The declaration form can be downloaded from our website at u www.samsongroup.com > SERVICE & SUPPORT > After-sales Service.

4. Continue as described on our website at u www.samsongroup.com > SERVICE & SUPPORT > After-sales Service > Returning goods.

7.5 Ordering spare parts and operatingsupplies

Contact your nearest SAMSON subsidiary or the SAMSON After-sales Service for in-formation on spare parts, lubricants and tools.

Spare partsSee section 10.2 for details on spare parts.LubricantsContact the SAMSON's After-sales Service for more information on suitable lubricants.

ToolsContact the SAMSON's After-sales Service for more information on suitable tools.

32 EB 2559 EN

Malfunctions

Table 4: TroubleshootingMalfunction Possiblereasons Recommended action

Tank pressure drops below the adjusted set point

Operating bellows blocked by the formation of ice

ÎUse a heat gun to melt ice.

DANGER!

Depending on the process medium: − Potentially explosive medium − Potentially explosive atmosphere

Pressure build-up vaporizer iced up ÎReduce consumption until most ice has melted.

Formation of ice on the pressure build-up vaporizer caused by peak consumption

ÎBrush accumulation of ice off the regulator.

DANGER!

Risk of burn injury from touching cold surfaces (see section 1.2)

Tank pressure exceeds the adjusted set point

Frozen process medium is blocking the plug.

Î Install a new regulator or isolate the regulator and leave it warm up. Afterwards check whether the frozen medium has sublimated (e.g. dry ice)

No medium consumption (oper-ational standstill). Incoming heat and medium vaporization.

ÎEnsure for continuous medium withdrawal

Safety function responds after the tank has been filled.

ÎClose the shut-off valves (6.1 and 6.2) to isolate the regulator and pressure build-up vaporizer. Reduce the tank pressure through medium withdrawal or blow-off. After the pressure set point in the tank is reached, reopen the shut-off valves.

8 MalfunctionsThe malfunctions listed in Table 4 are caused by mechanical faults and incorrect regulator sizing. In the simplest case, the functioning can be restored following the recommended action. Special tools may be required for re-pair work.Exceptional operating and installation condi-tions may lead to changed situations that may affect the control response and lead to malfunctions. For troubleshooting, the condi-tions, such as installation, process medium, temperature and pressure conditions, must be taken into account.

SAMSON's After-sales Service can help during troubleshooting. Further information is available in section 10.1. We recommend removing the regulator from the pipeline be-fore repairing it.

SAMSON's After-sales Service can support you in drawing up an inspection and test plan for your plant.

Contact SAMSON's After-sales Service for malfunctions not listed in the table.

Tip

Note

EB 2559 EN 33

Decommissioningandremoval

Risk of personal injury due to residual pro-cess medium in the regulator.While working on the regulator, residual process medium can escape and, depending on its properties, may lead to personal injury, e.g. (chemical) burns.Wear protective clothing, safety gloves and eyewear.

9.1 DecommissioningTo decommission the regulator for service and repair work or disassembly, proceed as follows:

Î Refer to Fig. 5.1. Close the shut-off valve (6.1) on the up-

stream side of the regulator.2. Close the shut-off valve (6.2) on the

downstream side of the regulator.3. Completely drain the pipelines and regu-

lator.4. Depressurize the plant.5. Allow the pipeline and device to heat up.6. Detach the pipe fittings.7. Remove the regulator from the pipeline.

9.2 Disposal Î Observe local, national and internation-al refuse regulations.

Î Do not dispose of components, lubricants and hazardous substances together with your household waste.

WARNING!9 Decommissioningandremoval

Risk of bursting in pressure equipment.Regulators and pipelines are pressure equip-ment. Improper opening can lead to bursting of the regulator. − Before starting any work on the regulator, depressurize all plant sections concerned as well as the regulator. − Drain the process medium from all the plant sections concerned as well as the regulator. − Wear personal protective equipment.

Risk of burn injuries due to hot or cold com-ponents and pipeline.Regulator components and the pipeline may become very hot or cold. Risk of burn inju-ries. − Allow components and pipelines to cool down or heat up. − Wear protective clothing and safety gloves.

Process medium can escape uncontrolled on dismantling the regulator.Risk of cold burns.Allow the regulator to defrost before depressurizing and draining it and remove it from the pipeline.

DANGER!

WARNING!

WARNING!

34 EB 2559 EN

Annex

10 Annex

10.1 After-salesserviceContact SAMSON's After-sales Service for support concerning service or repair work or when malfunctions or defects arise.E-mailaddressYou can reach our After-sales Service at aftersalesservice@samsongroup.com.

AddressesofSAMSON AGanditssubsid-iariesThe addresses of SAMSON, its subsidiaries, representatives and service facilities worldwide can be found on our website (u www.samsongroup.com) or in all SAMSON product catalogs.To assist diagnosis and in case of an unclear mounting situation, specify the following de-tails (so far as possible). See section 2.1: − Device type and nominal size − KVS coefficient − Model number and configuration ID − Customer-specific details − Upstream and downstream pressure − Temperature and process medium − Min. and max. flow rate − Installation drawing showing the exact

location of the regulator and all the ad-ditionally installed components (shut-off valves etc.)

10.2 Spare parts and accesso-ries

All spare parts and accessories are listed in the Data Sheet u T 2570.

SAMSON's After-sales Service can support you concerning lubricant, tightening torques and tools approved by SAMSON.

10.3CertificatesThe EU declarations of conformity are in-cluded on the next pages.

Note

EB 2559 EN 35

SAMSON AKTIENGESELLSCHAFT Weismüllerstraße 3 60314 Frankfurt am Main

Telefon: 069 4009-0 · Telefax: 069 4009-1507 E-Mail: samson@samson.de

Revision 03

Modul D/Module D, Nr./No. / N° CE-0062-PED-D-SAM 001-16-DEU-rev-A SAMSON erklärt in alleiniger Verantwortung für folgende Produkte:/For the following products, SAMSON hereby declares

under its sole responsibility:

Druckregler DR 2357-1, -11, -2-, -21, -3, -31/Pressure Regulator PR 2357-1, -11, -2-, -21, -3, -31

die Konformität mit nachfolgender Anforderung/the conformity with the following requirement.

Richtlinie des Europäischen Parlaments und des Rates zur Harmonisierung der Rechtsvorschriften der Mitgliedstaaten über die Bereitstellung von Druckgeräten auf dem Markt.

2014/68/EU vom 15.05.2014

Directive of the European Parliament and of the Council on the harmonization of the laws of the Member States relating of the making available on the market of pressure equipment.

2014/68/EU of 15 May 2014

EG-Baumusterprüfbescheinigung EC Type Examination Certificate

Modul B Module B

Zertifikat-Nr./Certificate no. 01 202 931-B-10-16

Angewandtes Konformitätsbewertungsverfahren Conformity assessment procedure applied

Modul D Module D

Zertifikat-Nr./Certificate no. CE-0062-PED-D-SAM-001-16-DEU-rev-A

Dem Entwurf zu Grunde gelegt sind Verfahren aus:/The design is based on the procedures specified in the following standards: DIN EN 12516-3 bzw./or ASME B16.24

Das Qualitätssicherungssystem des Herstellers wird von folgender benannter Stelle überwacht: The manufacturer’s quality management system is monitored by the following notified body:

Bureau Veritas S.A. Nr./No. 0062, Newtime, 52 Boulevard du Parc, IIle de la Jatte, 92200 Neuilly sur Seine, France Hersteller:/Manufacturer: SAMSON AG, Weismüllerstraße 3, 60314 Frankfurt am Main, Germany

Frankfurt am Main, 08. Februar 2017/08 February 2017

Klaus Hörschken Dr. Michael Heß Zentralabteilungsleiter/Head of Central Department Zentralabteilungsleiter/Head of Central Department Entwicklung Ventile und Antriebe/R&D, Valves and Actuators Product Management & Technical Sales

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36 EB 2559 EN

EB 2559 EN 37

SAMSON AGMESS- UND REGELTECHNIK

SAMSON AG Weismüllerstraße 3 Phone: +49 69 4009-0 Chairman of the Executive Board: Gernot Frank (CEO), Registered in

Postfach 10 19 01 60314 Frankfurt/M., Germany Fax: +49 69 4009-1507 Supervisory Board: Hans-Erich Grimm, Prof. Dr. Heinfried Hoffmann, Frankfurt/Main

60019 Frankfurt/M., Germanyhttp://www.samson.de E-mail: samson@samson.de Dr. Nikolaus Hensel Josef Tonus, Ludwig Wiesner under No. HRB 7131

Manufacturer´s Declaration

For the following products:

Type 2357-3Pressure Build-up Regulator with safety function

and integrated pressure relief valve

The combined Type 2357-3 Pressure Build-up Regulator is suitablefor the use with liquefied cryogenic gases as well as flammable gases.

The medium is sealed from the atmosphere by a metal bellows.

This declaration is issued by

SAMSON AGWeismüllerstraße 3

60314 Frankfurt am MainGermany

Frankfurt, 28 August 2007

Uwe Vogel Rudolf LässlerHead of Central Department Head of Central DepartmentTechnical Sales Self-operated Regulator Development

Manufacturer´s DeclarationV4/HE-1087-0

Changed on: 2007-08-28

By: V41/Kls/V44/Rch

38 EB 2559 EN

EB 2559 EN 39

2021

-07-

14 ·

Engl

ish

SAMSON AKTIENGESELLSCHAFTWeismüllerstraße 3 · 60314 Frankfurt am Main, GermanyPhone: +49 69 4009-0 · Fax: +49 69 4009-1507samson@samson.de · www.samson.de

EB 2559 EN