Samson 3381 Series Service manual

Translation of original instructions
EB 8084 EN
Edition April 2021
Series3381 · Type3381 Silencer
DIN and ANSI versions

Denition 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
EB 8084 EN
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. The images shown in
these instructions are for illustration purposes only. The actual product may vary.
ÎFor the safe and proper use of these instructions, read them carefully and keep them for
later reference.
ÎIf you have any questions about these instructions, contact SAMSON‘s After-sales Service
([e-mail]).
Documents relating to the device, such as the mounting and operating
instructions, are available on our website at www.samsongroup.com >
Service & Support > Downloads > Documentation.

Contents
EB 8084 EN
1 Safety instructions and measures ................................................................1-1
1.1 Notes on possible severe personal injury ......................................................1-4
1.2 Notes on possible personal injury ................................................................1-5
1.3 Notes on possible property damage.............................................................1-5
2 Markings on the device ..............................................................................2-1
2.1 Nameplate .................................................................................................2-1
2.2 Directionofow .........................................................................................2-1
3 Design and principle of operation ...............................................................3-1
3.1 Design .......................................................................................................3-1
3.2 Principle of operation ..................................................................................3-3
3.3 Technical data ............................................................................................3-3
4 Shipment and on-site transport ...................................................................4-1
4.1 Accepting the delivered goods .....................................................................4-1
4.2 Removing the packaging from the silencer ....................................................4-1
4.3 Transporting and lifting the silencer ..............................................................4-1
4.3.1 Transporting the silencer..............................................................................4-2
4.3.2 Lifting the silencer .......................................................................................4-3
4.4 Storing the silencer......................................................................................4-6
5 Installation.................................................................................................5-1
5.1 Installation conditions..................................................................................5-1
5.1.1 Depending on the version............................................................................5-1
5.1.2 Support and suspension ..............................................................................5-1
5.1.3 UseoftheType3381Silencertogetherwithself-operatedregulators ..............5-2
5.2 Preparation for installation...........................................................................5-4
5.3 Mounting the silencer ..................................................................................5-4
5.4 Testing the installed components...................................................................5-9
6 Start-up, operation, decommissioning, servicing..........................................6-1
7 Removal ....................................................................................................7-1
7.1 Removing the silencer from the pipeline ........................................................7-1
8 Repairs ......................................................................................................8-1
8.1 ReturningdevicestoSAMSON ....................................................................8-1
9 Disposal.....................................................................................................9-1
10 Certicates...............................................................................................10-1

Contents
EB 8084 EN
11 Annex......................................................................................................11-1
11.1 Tightening torques, lubricants and tools ......................................................11-1
11.2 After-sales service.....................................................................................11-1

EB 8084 EN 1-1
Safety instructions and measures
1 Safety instructions and measures
Intended use
TheType3381Silenceractsasaxedrestrictiontoreducethesoundpressurelevel.Itisde-
signedformountingonSAMSONSeries240andSeries250ControlValves.Thesilenceris
usedtoreducethenoiseofliquids,gasesandvaporsastheyowthroughthevalveandto
reduce the velocity of compressible media (e.g. gases and vapors) at the valve outlet.
Thesilencerisdesignedtooperateunderexactlydenedconditions(e.g.operatingpressure,
process medium, temperature). Therefore, operators must ensure that the silencer is only used
inoperatingconditionsthatmeetthespecicationsusedforsizingattheorderingstage.In
caseoperatorsintendtousethesilencerinotherapplicationsorconditionsthanspecied,
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.
ÎRefertothetechnicaldataandnameplateforlimitsandeldsofapplicationaswellas
possible uses.
Reasonably foreseeable misuse
The silencer is not suitable for the following applications:
− Velocityreductionofincompressiblemedia
− Useoutsidethelimitsdenedduringsizingandbythetechnicaldata
Furthermore, the following activities do not comply with the intended use:
− Use of non-original spare parts
− Performing service and repair work not described
Qualications of operating personnel
The silencer must be mounted, started up, serviced and repaired by fully trained and quali-
edpersonnelonly;theacceptedindustrycodesandpracticesmustbeobserved.According
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spe-
cializedtraining,theirknowledgeandexperienceaswellastheirknowledgeoftheapplica-
ble standards.
Weldingoperationsmustonlybeperformedbypersonnelwhohasthenecessaryqualica-
tion to perform the applied welding procedure and handle the materials used.

1-2 EB 8084 EN
Safety instructions and measures
Explosion-protectedversionsofthisdevicemustbeoperatedonlybypersonnelwhohasun-
dergonespecialtrainingorinstructionsorwhoisauthorizedtoworkonexplosion-protected
devicesinhazardousareas.
Theoperatingpersonnelmustbespeciallytrainedforthecorrectandsafehandlingofoxy-
genwhenvalvesareusedforoxygenservice.
Personal protective equipment
Werecommendcheckingthehazardsposedbytheprocessmediumbeingused(e.g.
uGESTIS(CLP)hazardoussubstancesdatabase).Dependingontheprocessmediumand/
or the activity, the protective equipment required includes:
− Protective clothing, gloves, eye protection and respiratory protection in applications with
hot,coldand/orcorrosivemedia
− Wear hearing protection when working near the valve
− Hard hat
− Safety harness when working at height
− Safety footwear, ESD (electrostatic discharge) footwear, if necessary
ÎCheckwiththeplantoperatorfordetailsonfurtherprotectiveequipment.
Revisions and other modications
Revisions,conversionsorothermodications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.
Safety features
TheType3381Silencerdoesnothaveanyspecialsafetyfeatures.
Warning against residual hazards
To avoid personal injury or property damage, plant operators and operating personnel must
preventhazardsthatcouldbecausedinthesilencerbytheprocessmedium,theoperating
pressure, the signal pressure or by moving parts by taking appropriate precautions. Plant op-
eratorsandoperatingpersonnelmustobserveallhazardstatements,warningandcaution
notes in these mounting and operating instructions.
Hazardsresultingfromthespecialworkingconditionsattheinstallationsiteofthesilencer
mustbeidentiedinariskassessmentandpreventedthroughthecorrespondingsafetyin-
structions drawn up by the operator.

EB 8084 EN 1-3
Safety instructions and measures
Responsibilities of the operator
Operators are responsible for proper use and compliance with the safety regulations. Opera-
tors are obliged to provide these mounting and operating instructions as well as the refer-
enced documents to the operating personnel and to instruct them in proper operation. Fur-
thermore,operatorsmustensurethatoperatingpersonnelorthirdpartiesarenotexposedto
any danger.
Responsibilities of operating personnel
Operating personnel must read and understand these mounting and operating instructions as
wellasthereferenceddocumentsandobservethespeciedhazardstatements,warnings
and caution notes. Furthermore, operating personnel must be familiar with the applicable
health, safety and accident prevention regulations and comply with them.
Referenced standards, directives and regulations
The silencers comply with the requirements of the European Pressure Equipment Directive
2014/68/EU.The'Certicates'sectioncontainsthisdeclarationofconformity,whichin-
cludes information about the applied conformity assessment procedure.
Referenced documentation
The following documents apply in addition to these mounting and operating instructions:
− Mounting and operating instructions for the valve on which it is mounted
− Foroxygenservice:ManualuH01
Thepackagingofsilencersconstructedandsizedforoxygenservicehasthefollowingla-
bel on it:
Sauerstoff!
Oxygen!
Oxygène!
− When a substance is used in the device, which is listed as being a substance of very high
concernonthecandidatelistoftheREACHregulation:
Information on safe use of the part affected
uwww.samsongroup.com>AboutSAMSON>MaterialCompliance>REACH

1-4 EB 8084 EN
Safety instructions and measures
If a 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indicatedonthe
SAMSON delivery note.
1.1 Notes on possible severe personal injury
DANGER
!
Risk of bursting in pressure equipment.
Valvesandpipelinesarepressureequipment.Impermissiblepressureorimproper
opening can lead to valve components bursting.
ÎObservethemaximumpermissiblepressureforvalveandplant.
ÎBeforestartinganyworkonthecontrolvalve,depressurizeallplantsectionsaffect-
ed as well as the valve.
ÎDrain the process medium from all the plant sections concerned as well as the
valve.
Risk of injury due to incorrect handling of oxygen or cryogenic gases in applica-
tions.
Specialversionsofthesilencercanbeusedforoxygenserviceorapplicationswith
cryogenicgases.Oxygenisahazardoussubstance,whichreactsquickly,leadingto
combustionandexplosions.Contactwithcryogenicgasescausesseverefrostbiteand
cold burns (cryogenic burns). Operating personnel must be trained for these applica-
tions.Unqualiedoperatingpersonnelexposethemselvesandotherstoanincreased
risk of injury.
ÎOperatingpersonnelmustbesufcientlytrainedandbemadeawareofthehaz-
ardsinapplicationsinvolvingoxygenorcryogenicgases.
ÎInstructionsandinformationonhowtosafelyhandledevicesforoxygenservice
can be found in the Manual uH01.

EB 8084 EN 1-5
Safety instructions and measures
1.2 Notes on possible personal injury
WARNING
!
Risk of burn injuries due to hot or cold components and pipelines.
Depending on the process medium, valve components and pipelines may get very hot
or cold and cause burn injuries.
ÎAllow components and pipelines to cool down or warm up to the ambient tempera-
ture.
ÎWear protective clothing and safety gloves.
Risk of personal injury due to residual process medium in the silencer.
Whileworkingonthesilencer,residualmediumcanowoutofthesilencerand,de-
pending on its properties, cause personal injury, e.g. (chemical) burns.
ÎIf possible, drain the process medium from all the plant sections affected and the si-
lencer.
ÎWear protective clothing, safety gloves, respiratory protection and eye protection.
Exposure to hazardous substances poses a serious risk to health.
Certainlubricantsandcleaningagentsareclassiedashazardoussubstances.These
substances have a special label and a material safety data sheet (MSDS) issued by the
manufacturer.
ÎMakesurethatanMSDSisavailableforanyhazardoussubstanceused.Ifneces-
sary, contact the manufacturer to obtain an MSDS.
ÎInformyourselfaboutthehazardoussubstancesandtheircorrecthandling.
1.3 Notes on possible property damage
NOTICE
!
Risk of leakage and damage due to excessively high or low tightening torques.
Observethespeciedtorqueswhentighteningboltedjoints.Excessivetightening
torques lead to parts wearing out more quickly. Parts that are too loose may cause leak-
age.
ÎObserve the usual tightening torques for the corresponding bolt diameters.

1-6 EB 8084 EN
Safety instructions and measures
NOTICE
!
Risk of silencer damage due to the use of unsuitable lubricants.
The lubricants to be used depend on the silencer material. Unsuitable lubricants may
corrode and damage surfaces.
ÎOnly use lubricants approved by SAMSON.
Risk of the process medium being contaminated through the use of unsuitable lubri-
cants and/or contaminated tools and components.
ÎIfnecessary(e.g.foroxygenservice),keepthesilencerandthetoolsusedfreefrom
solvents and grease.
ÎMake sure that only suitable lubricants are used.

EB 8084 EN 2-1
Markings on the device
2 Markings on the device
2.1 Nameplate
Dependingontheversion,theType3381Si-
lencer has a single or a two-piece name-
plate:
12
13
9
11
10
78
6
5
4
2
1
Fig.2-1: Single nameplate on the valve
13
10
5
1
12
9
11
86
42
Fig.2-2: Two-piece nameplate · Inscriptions
Item Inscription meaning
1DataMatrixcode
2 Type designation
4 Material
5 Month and year of manufacture
6Nominalsizeatinlet:
DIN: DN · ANSI: NPS · JIS: DN
7Nominalsizeatoutlet:
DIN: DN · ANSI: NPS · JIS: DN
8Pressure rating:
DIN: PN · ANSI: CL · JIS: K
9Ordernumber/item
10 Countryoforigin
11 CEmarking
Item Inscription meaning
12 IDofthenotiedbody
PED: Pressure Equipment Directive
G1/G2: gases and vapors
Fluidgroup1=hazardous
Fluidgroup2=other
L1: liquids
Fluidgroup1=hazardous
Fluidgroup2=other
I/II/III:Category1to3
13 Serial number
Fig.2-3: Nameplate and directional arrow on
the silencer
2.2 Direction of ow
ThedirectionalarrowontheType3381Si-
lencerindicatesthedirectionofow(2).

2-2 EB 8084 EN

EB 8084 EN 3-1
Design and principle of operation
3 Design and principle of oper-
ation
3.1 Design
Type 3381-1:
− Single attenuation plates mounted be-
tweenthevalveorapipeexpanderand
thepipeange(seeFig.3-1).
Type 3381-R:
− Reduced construction using less material:
single attenuation plates with reduced di-
ameter and possibly reduced thickness,
clampedbetweenthevalveorapipeex-
panderandthepipeange(see
Fig.3-2).
Type 3381-3-X:
− Silencerwithtwotoveattenuation
plates located in one housing. An addi-
tionalpipeexpanderisnotrequired(see
Fig.3-3).
Fig.3-1: Type3381‑1: Attenuation
plate downstream of pipe
expander
Fig.3-2: Type3381‑1R: Reduced construction with
attenuation plate downstream of the pipe
expander

3-2 EB 8084 EN
Design and principle of operation
− A graphite gasket with metal core
(1.4301) is used in the standard version
as a seal between the housing and
clampingange.
Type3381-4-X:
− Systemwithtwotoveattenuationplates
installed as a wafer-type version. Usually
downstreamofapipeexpander(see
Fig.3-4).
Additional installation examples of various
versions can be found in the Data Sheet
uT8084.
Note
12
3
14 32
Legend
1Valveoutlet
2 Silencer
3 Pipeline
4Pipeexpander
Fig.3-3: Type3381‑3‑5: Five
attenuation plates in
a housing (top)
Fig.3-4: Type3381‑4‑5: Five
attenuation plates
clamped between
the pipe expander
and pipeline (wafer‑
type version) (right)

EB 8084 EN 3-3
Design and principle of operation
3.2 Principle of operation
TheType3381Silencerprovidesnoiseatten-
uationbyactingasaxedrestriction.Thesi-
lencerraisesthepressureofthemediumow
at the valve outlet and reduces the pressure
downstream of the silencer to the required
downstream pressure p2. As a result, the
sound pressure level is reduced. In applica-
tions using compressible media, it addition-
allylowerstheowvelocityatthevalveout-
let.
The pressure reduction per attenuation plate
(Δp)dependsontheowrateandthepre-
vailingoperatingtemperature.Generally,
the pressure reduction is between 1 and
7bar.
Ave-stagesilencer(Type3381-3-5)nor-
mallyprovidesamaximumpressuredropof
35bar.
3.3 Technical data
Noise emissions
SAMSON is unable to make general state-
ments about noise emissions. The noise emis-
sions depend on the valve version, plant fa-
cilities and process medium.
Dimensions and weights
Details on dimensions and weights are avail-
able on request.
More information is available in Data Sheet
uT8084.
Note
Table 3-1: Technical data
Type3381-1, Type3381-1R, Type3381-3-X or Type3381-4-X Silencer
Version according to DIN ANSI
Material1) Forged steel
P250GH·
1.0460
Forged stainless
steel 1.4401
Forged steel
A105
Forged stainless
steelA182F316
Nominalsize DN40to800 NPS1½to32
Pressure rating2)3) PN 10 to 400 Class150to2500
Type of connection All DIN EN versions All ANSI versions
Temperature range4) –50to+400°C –58to+750°F
1) Other materials on request
2) Onlynominalsizespossibleaccordingtothestandard
3) Varyingpressureratingsfortheinletandoutletcannotbeimplemented
4) Other temperature ranges on request

3-4 EB 8084 EN
Design and principle of operation
Table 3-2: Possible wafer‑type versions for Type3381‑1R as well as for combinations of
Type3381‑1 and Type3381‑1R
Note:
− Wafer-type version only for standard materials according to Table 3-1
− Onlynominalsizespossibleaccordingtothestandardanddependingonthepressure
rating
DIN EN versions ANSI versions
Nominal size Pressure rating (min.) Nominal size Pressure rating (min.)
DN200 PN400andhigher NPS8 Class2500andhigher
DN250 PN250andhigher NPS10 Class1500andhigher
DN300 PN100andhigher NPS12 Class600andhigher
DN350 PN63andhigher – –
DN450 PN40andhigher NPS 16 and larger All pressure ratings
DN600andlarger All pressure ratings – –

EB 8084 EN 4-1
Shipment and on-site transport
4 Shipment and on-site trans-
port
The work described in this section is only to
be performed by personnel appropriately
qualiedtocarryoutsuchtasks.
4.1 Accepting the delivered
goods
After receiving the shipment, proceed as fol-
lows:
1. Checkthescopeofdelivery.Checkthat
thespecicationsonthesilencermatch
thespecicationsinthedeliverynote.
See the 'Markings on the device' section
for the inscriptions on the device.
2. Checktheshipmentfortransportation
damage. Report any damage to
SAMSON and the forwarding agent
(refer to delivery note).
3. Determine the weight and dimensions of
the units to be lifted and transported in
order to select the appropriate lifting
equipment and lifting accessories, if re-
quired (see transport documents).
4.2 Removing the packaging
from the silencer
Observe the following sequence:
ÎDo not open or remove the packaging
until immediately before lifting to install
the silencer into the pipeline.
ÎLeave the silencer in its transport contain-
er or on the pallet to transport it on site.
ÎDispose and recycle the packaging in ac-
cordance with the local regulations.
4.3 Transporting and lifting the
silencer
Danger due to suspended loads falling.
ÎStay clear of suspended or moving
loads.
ÎClose off and secure the transport paths.
Risk of lifting equipment tipping over and
risk of damage to lifting accessories due to
exceeding the rated lifting capacity.
ÎOnly use approved lifting equipment and
accessories whose minimum lifting ca-
pacity is higher than the weight of the si-
lencer (including the packaging, if appli-
cable).
Risk of personal injury due to incorrect
attachment of slings and their slipping as a
result.
ÎUse the lifting eyelet/eyebolt to attach
the sling to the silencer.
ÎUse a hook with safety latch (see
Fig.4‑1) to secure the slings from slip-
ping off the hook during lifting and
transporting.
DANGER
!
WARNING
!
WARNING
!

4-2 EB 8084 EN
Shipment and on-site transport
Risk of injury due to incorrect lifting without
the use of lifting equipment.
Lifting the silencer without the use of lifting
equipment may lead to injuries (back injury
in particular) depending on the weight of the
silencer.
ÎObserve the occupational health and
safety regulations valid in the country of
use.
Our after‑sales service can provide more de-
tailed transport and lifting instructions on re-
quest.
4.3.1 Transporting the silencer
The silencer can be transported using lifting
equipment (e.g. crane or forklift).
ÎLeave the silencer in its transport contain-
er or on the pallet to transport it.
ÎObserve the transport instructions.
Transport instructions
− Protectthesilenceragainstexternalinu-
ences (e.g. impact).
− Do not damage the corrosion protection
(paint, surface coatings). Repair any
damage immediately.
− Protect the silencer against moisture and
dirt.
− The permissible transportation tempera-
ture of standard silencers is –20 to
+65°C.
Contact our after‑sales service for the trans-
portation temperatures of other valve ver-
sions.
WARNING
!
Tip
Note

EB 8084 EN 4-3
Shipment and on-site transport
4.3.2 Lifting the silencer
To install a large silencer into the pipeline,
use lifting equipment (e.g. crane or forklift)
to lift it.
Lifting instructions
− Use a hook with safety latch (see
Fig.4-1)tosecuretheslingsfromslip-
ping off the hook during lifting and
transporting.
− Secure slings against slipping.
− Make sure the slings can be removed af-
ter installation.
− Prevent the load from tilting or tipping.
− Do not leave loads suspended when in-
terrupting work for longer periods of
time.
a) Type3381, Type3381-1R,
Type3381-4-X and
Type3381-3-X without valve
1. Attachaslingtotheliftingeyelet/eyebolt
on the silencer and to the rigging equip-
ment (e.g. hook) of the crane or forklift
(seeFig.4-1).
2. Carefullyliftthesilencer.Checkwhether
the lifting equipment and accessories can
bear the weight.
3. Move the silencer at an even pace to the
site of installation.
4. Install the silencer into the pipeline be-
tweentheoutletangeofthevalvebody
ortheangeofthepipeexpanderand
thepipelineange(seethe'Installation'
section).
5. After installation in the pipeline, check
whethertheangesareboltedtightor
the welding joints hold and the valve in-
cluding the silencer in the pipeline holds.
6. Remove slings.
Fig.4-1: Type3381‑3‑X without valve

4-4 EB 8084 EN
Shipment and on-site transport
b) Type3381-3-X with valve
SeeFig.4-2
Incorrect lifting will damage the valve.
The valve bonnet (yoke) may become dam-
aged through the introduction of a bending
moment.
ÎAttach the slings in such a way that the
mid‑axis of the valve and the mounted
silencer is always in the horizontal
position and that the axis of the plug/
actuator stem remains in the vertical
position during lifting.
Incorrect mounting before lifting will dam-
age the valve.
ÎThe valve and silencer must be bolted to-
gether with the full tightening torque as
specied before lifting (see the 'Installa-
tion' section).
TheType3381-3-XSilencerisboltedtothe
control valve before they are both installed
into the pipeline (see the 'Installation' sec-
tion).
1. Attachoneslingtotheangeonthe
valve body and to the rigging equipment
(e.g. hook) of the crane or forklift.
2. Attachaslingtotheliftingeyelet/eyebolt
on the silencer and to the rigging equip-
ment (e.g. hook) of the crane or forklift.
3. For actuator versions with lifting eyelet,
attach an additional sling to the lifting
eyelet of the actuator and to the rigging
equipment of the crane or forklift.
NOTICE! This sling must not bear any
load. It only protects it from tilting while
being lifted. Before lifting the control
valve, tighten the sling.
4. Carefullyliftthecontrolvalvewith
mounted silencer. Make sure that the
mid-axisofthevalveandthemountedsi-
lencerisalwaysinthehorizontalposi-
tionandthattheaxisoftheplug/actua-
tor stem is in the vertical position during
lifting.
NOTICE! The valve bonnet (yoke) may
become damaged through the introduc-
tion of a bending moment.
Checkwhethertheliftingequipmentand
accessories can bear the weight.
5. Move the control valve including the si-
lencer at an even pace to the site of in-
stallation.
6. Install the valve and silencer into the
pipeline (see the 'Installation' section).
7. After installation in the pipeline, check
whethertheangesareboltedtightand
the valve including the silencer in the
pipeline holds.
8. Remove slings.
NOTICE
!
NOTICE
!