Samson 43-2 Service manual

Translation of original instructions
EB 2171 EN
Types43-1, 43-2, 43-5 and 43-7 Temperature Regulators
Self-operated Regulators
Edition April 2022
Type43-2·Spheroidal graphite
iron body with anges
Type43-1·Stainless steel
body with female thread
Type43-2·Red brass body
with welding ends
Type43-5·Red brass body
with female thread Type43-7·Red brass body
with welding ends
Type43-7·Spheroidal
graphite iron body with
anges

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]).
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
EB 2171 EN

Contents
EB 2171 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
2 Markings on the device ..............................................................................2-1
2.1 Valve nameplate .........................................................................................2-1
2.2 Nameplate of control thermostat ..................................................................2-2
2.3 Location of the nameplate on valve and control thermostat .............................2-2
2.4 Material identication number .....................................................................2-3
3 Design and principle of operation ...............................................................3-1
3.1 Additional ttings........................................................................................3-3
3.2 Technical data ............................................................................................3-4
4 Shipment and on-site transport ...................................................................4-1
4.1 Accepting the delivered goods .....................................................................4-1
4.2 Removing the packaging from the regulator ..................................................4-1
4.3 Transporting and lifting the regulator............................................................4-1
4.4 Storing the regulator ...................................................................................4-2
5 Installation.................................................................................................5-1
5.1 Installation conditions..................................................................................5-1
5.2 Preparation for installation...........................................................................5-3
5.3 Mounting ...................................................................................................5-5
5.3.1 Installing the regulator.................................................................................5-6
5.3.2 Cleaning the pipeline ..................................................................................5-6
5.4 Testing the regulator ....................................................................................5-6
5.4.1 Leak test.....................................................................................................5-7
5.4.2 Pressure test................................................................................................5-7
5.5 Insulation ...................................................................................................5-8
6 Start-up .....................................................................................................6-1
6.1 Start-up and putting the device back into operation .......................................6-2
6.1.1 Starting up the plant when gases and liquids are controlled............................6-2
6.1.2 Starting up the plant when vapors are controlled...........................................6-2
7 Operation..................................................................................................7-1
7.1 Adjusting the temperature set point...............................................................7-1
8 Malfunctions ..............................................................................................8-1
8.1 Troubleshooting ..........................................................................................8-1
8.2 Emergency action .......................................................................................8-3

Contents
EB 2171 EN
9 Servicing....................................................................................................9-1
9.1 Preparing the valve for service work.............................................................9-4
9.2 Installing the regulator after service work ......................................................9-4
9.3 Service work...............................................................................................9-4
9.4 Cleaning and exchanging the seat and plug .................................................9-4
9.4.1 Types43-1 and 43-2 ..................................................................................9-5
9.4.2 Types43-5 and 43-7 ..................................................................................9-6
9.5 Ordering spare parts and operating supplies ................................................9-6
10 Decommissioning .....................................................................................10-1
11 Removal ..................................................................................................11-1
11.1 Removing the control thermostat.................................................................11-1
11.2 Removing the regulator from the pipeline....................................................11-1
12 Repairs ....................................................................................................12-1
12.1 Returning devices to SAMSON ..................................................................12-1
13 Disposal...................................................................................................13-1
14 Certicates...............................................................................................14-1
15 Annex......................................................................................................15-1
15.1 Tightening torques.....................................................................................15-1
15.2 Tools ........................................................................................................15-1
15.3 Lubricant..................................................................................................15-1
15.4 Spare parts ..............................................................................................15-2
15.4.1 Type2431 and Type2432 ........................................................................15-2
15.4.2 Type2435 and Type2437 ........................................................................15-3
15.5 After-sales service.....................................................................................15-4

EB 2171 EN 1-1
Safety instructions and measures
1 Safety instructions and measures
Intended use
The SAMSON Types43-1, 43-2, 43-5 and Type43-7 Regulators are temperature regulators.
They consist of a Type2431, 2432, 2435 or 2437 Valve and a Type2430 Control Thermo-
stat. The valve and control thermostat are delivered separately and must be assembled ac-
cording to the instructions in this document.
The self-operated regulators are used to control the temperature in the plant to the adjusted
set point. Liquids and gases in district heating systems can be controlled by the Type43-1
and Type43-2 Regulators. The Types43-5 and 43-7 Regulators are used to control steam.
The regulators are designed to operate under exactly dened 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 specications used for sizing the devices at
the ordering stage. In case operators intend to use the regulators 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 regulators are not suitable for the following applications:
−Use outside the limits dened during sizing and by the technical data
−Use outside the limits dened by the additional ttings 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
Safety features
The Types43-1, 43-2, 43-5 and 43-7 Temperature Regulators do not have any special safe-
ty features. When relieved of pressure, the regulators are opened by the force of the internal
valve springs.

1-2 EB 2171 EN
Safety instructions and measures
Qualications of operating personnel
The regulator 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.
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:
ÎProtective clothing, safety gloves and eye protection in applications with hot, cold and/or
corrosive media
ÎWear hearing protection when working near the valve
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.
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 regulator by the process medium, the operating
pressure or by moving parts by taking appropriate precautions. Plant operators and operat-
ing 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 regulator
must be identied in a risk assessment and prevented through the corresponding safety in-
structions drawn up by the operator.
We also recommend checking the hazards posed by the process medium being used (e.g.
uGESTIS (CLP) hazardous substances database).
ÎObserve safety measures for handling the device as well as re prevention and explosion
protection measures.

EB 2171 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 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 'Certicates' section.
According to the ignition risk assessment performed in accordance with Clause5.2 of
ISO80079-36, 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
Directive 2014/34/EU.
ÎFor connection to the equipotential bonding system, observe the requirements specied in
Clause6.4 of EN60079-14 (VDE0165-1).

1-4 EB 2171 EN
Safety instructions and measures
1.1 Notes on possible severe personal injury
DANGER
!
Risk of bursting in the regulator.
Regulators and pipelines are pressure equipment. Impermissible pressure or improper
opening of the regulator can lead to regulator components bursting.
ÎObserve the maximum permissible pressure for regulator and plant.
ÎBefore starting any work on the regulator, depressurize all plant sections affected
as well as the regulator.
ÎDrain the process medium from all the plant sections affected as well as the regula-
tor.
Referenced documentation
The following documents apply in addition to these mounting and operating instructions:
−Mounting and operating instructions for
e.g. Type2430 Control Thermostat uEB2430
e.g. Type 2403 Safety Temperature Monitor (STM) uEB2183
e.g. Type 2439 Safety Temperature Limiter (STL) uEB2185
e.g. Type1NI Strainer uEB1010
e.g. Type2NI Strainer uEB1015
−Data sheets for
e.g. Accessories: Double adapter·Manual adjuster·Intermediate
insulating piece uT2176
e.g. Typetested safety devices uT2181
e.g. Type 2403 Safety Temperature Monitor (STM) uT2183
e.g. Type 2439 Safety Temperature Limiter (STL) uT2185
e.g. Type1NI Strainer uT1010
e.g. Type2NI Strainer uT1015
−Mounting and operating instructions as well as data sheets for additional ttings
(e.g. shut-off valves, pressure gauges etc.).

EB 2171 EN 1-5
Safety instructions and measures
1.2 Notes on possible personal injury
WARNING
!
Damage to health relating to the REACH regulation.
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.
ÎInformation on safe use of the part affected. uwww.samsongroup.com/en/
about-samson/material-compliance/reach-regulation/
Risk of personal injury through incorrect operation, use or installation as a result of
information on the regulator being illegible.
Over time, markings, labels and nameplates on the regulator may become covered
with dirt or become illegible in some other way. As a result, hazards may go unno-
ticed and the necessary instructions not followed. There is a risk of personal injury.
ÎKeep all relevant markings and inscriptions on the device in a constantly legible
state.
ÎImmediately renew damaged, missing or incorrect nameplates or labels.
Risk of burn injuries due to hot or cold components and pipelines.
Depending on the process medium, regulator 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 hearing loss or deafness due to loud noise.
The noise emissions depend on the valve version, plant facilities and process medium.
ÎWear hearing protection when working near the valve.

1-6 EB 2171 EN
Safety instructions and measures
1.2 Notes on possible personal injury
WARNING
!
Risk of personal injury due to residual process 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.
ÎIf possible, drain the process medium from all the plant sections affected and the
regulator.
ÎWear protective clothing, safety gloves and eye protection.
1.3 Notes on possible property damage
NOTICE
!
Risk of regulator damage due to incorrectly attached slings.
ÎDo not attach load-bearing slings to the regulator.
Risk of regulator damage due to unsuitable medium properties.
The regulator is designed for a process medium with dened properties.
ÎOnly use the process medium specied for sizing.
Risk of regulator damage due to contamination (e.g. solid particles) in the pipeline.
The plant operator is responsible for cleaning the pipelines in the plant.
ÎFlush the pipelines before start-up.
Risk of regulator damage due to the use of unsuitable lubricants.
The lubricants to be used depend on the regulator material. Unsuitable lubricants may
corrode and damage surfaces.
ÎOnly use lubricants approved by SAMSON.
When in doubt, consult SAMSON.

EB 2171 EN 1-7
Safety instructions and measures
1.3 Notes on possible property damage
NOTICE
!
Risk of leakage and regulator damage due to excessively high or low tightening
torques.
Observe the specied torques when tightening regulator components. Excessive tight-
ening torques lead to parts wearing out more quickly. Parts that are too loose may
cause leakage.
ÎObserve the specied tightening torques (see 'Tightening torques' in Annex).
Risk of excess pressure damaging plant sections due to construction-related seat
leakage through the regulator.
ÎAlways t a safety device (e.g. safety excess pressure valve or safety relief valve) in
the plant.
Risk of regulator damage due to the use of unsuitable tools.
Certain tools are required to work on the regulator.
ÎOnly use tools approved by SAMSON.
When in doubt, consult SAMSON.
Risk of the process medium being contaminated through the use of unsuitable lubri-
cants and/or contaminated tools and components.
ÎKeep the regulator and the tools used free from solvents and grease.
ÎMake sure that only suitable lubricants are used.
Incorrect control due to the formation of ice on the regulator.
Medium temperatures below 0°C may cause ice to form on the regulator, depending
on the air humidity. This may affect, in particular, the functioning of the plug or control
thermostat stem guide.
ÎPrevent the formation of ice by taking appropriate precautions (e.g. enclosure,
trace heater etc.). The plant operator is responsible for selecting and implementing
appropriate precautions. See the 'Installation' section.

1-8 EB 2171 EN
Safety instructions and measures
1.3 Notes on possible property damage
NOTICE
!
Risk of irreparable regulator damage caused by the regulator components being
taken apart.
The control thermostat is an inseparable hydraulic unit consisting of a control thermo-
stat, capillary tube and temperature sensor. If these components are dismantled (e.g.
removal of the capillary tube), the regulator will be irreparably damaged and will no
longer be able to fulll its control task.
ÎDo not dismantle the regulator.
ÎOnly perform allowed activities on the regulator.
ÎContact SAMSON's After-sales Service before replacing spare parts.
SAMSON's After-sales Service can support you concerning lubricant, tightening torques
and tools approved by SAMSON.
Note

EB 2171 EN 2-1
Markings on the device
2 Markings on the device
2.1 Valve nameplate
Nameplate on bodies made of red brass or spheroidal graphite iron
1Type designation
2Model number
3 Material number and device index
4 Order number or year of manufacture
5KVS/CV
6 Perm. temperature in °C/°F
7 Perm. temperature in °C/°F
SAMSON 1
23 4
5 6
7
Valve size, pressure rating and the arrow indicating the direction of ow are cast into the valve body.
Nameplate on stainless steel body
1Type designation
2Model number
3 Material number and device index
4 Order number or year of manufacture
5Flow coefcient:
DIN: KVS · ANSI: CV · JIS: CV
6Perm. temperature:
DIN: °C·ANSI: °F·JIS: °C/°F
7Max. perm. differential pressure Δp:
DIN: bar·ANSI: psi·JIS: bar/psi
8Thread size/valve size:
DIN: DN · ANSI: NPS· JIS: DN…A/B
9Pressure rating:
DIN: PN·ANSI: CL·JIS: K
10 Arrow indicating the direction of ow
10
SAMSON 1
23 4
586
97
Fig.2-1: Valve nameplates

2-2 EB 2171 EN
Markings on the device
2.2 Nameplate of control thermostat
2004
0062
23
5
6
4
1
1 Model number
2 Type designation
3 Material number
4 CE marking
5 Temperature range in °C and °F
6Register number (type test according to
DINEN14597)
Fig.2-2: Nameplate of the control thermostat
2.3 Location of the nameplate on valve and control thermostat
Type2431/2432/2435/3437
(red brass) Type2432 (stainless steel) Type2432/2437 (spheroidal graphite iron)
Location of the
nameplate
Location of the
nameplate
Top view
Type2430
Fig.2-3: Locations of the nameplates on the body

EB 2171 EN 2-3
Markings on the device
2.4 Material identication
number
The material of the Types2431, 2432, 2435
and 2437 Valves is indicated on the body.
Specifying the material number, you can
contact us to nd out more details. The mate-
rial number is specied on the nameplate
(‘Material number and device index’/3).
For more details on the nameplate, see sec-
tion2.2 and section2.1.

2-4 EB 2171 EN
Markings on the device

EB 2171 EN 3-1
Design and principle of operation
3 Design and principle of oper-
ation
ÎSee Fig.3-1
The regulators consists of a Type2431
(Type43-1), Type2432 (Type43-2),
Type2435 (Type43-5) or Type2437
(Type43-7) Globe Valve and a Type2430
Control Thermostat with set point adjuster, a
capillary tube and temperature sensor.
A temperature sensor operating according to
the adsorption principle is used as standard.
Details on the Type2430 Control Thermostat
with a temperature sensor operating accord-
ing to the vapor pressure principle can be
found in the mounting and operating instruc-
tions uEB2430-3.
The valve bodies are made of red brass,
spheroidal graphite iron or stainless steel.
The Type2430 Control Thermostat is at-
tached to the valve body (3) using the cou-
pling nut (40).
The temperature regulators work according
to the adsorption principle. The temperature
of the medium creates a pressure in the sen-
sor (48) which is proportional to the mea-
sured temperature. This pressure is trans-
ferred through the capillary tube (47) to the
operating element (46) and converted into a
positioning force. This force causes the pin of
the operating element (45) to move the plug
stem (1.3) with the plug (1). The plug is pres-
sure-balanced (1.1 or 1.2).
Note
By turning the set point adjuster (43), the
point of response is changed over the plug
spring. As a result, the temperature set point
is changed.
The Types43-1, 43-2, 43-5 and 43-7 Regu-
lators are suitable for plants to be heated.
The valves close when the temperature rises.
Version with safety thermostat
When a Type2439 or Type2403 Safety
Thermostat is attached to the valve or the
regulator, this combination functions as a
safety temperature limiter (TR/STL) or a safe-
ty temperature monitor (TR/STM).
Details in mounting and operating instruc-
tions uEB2185 (STL); uEB2083 (STM).
Version with double adapter
The temperature regulator can be equipped
with a double adapter to connect an addi-
tional control thermostat to control a further
control variable. See Data Sheet uT2176.
Version with handwheel
For the manual operation of the valve. The
manual adjuster can either be attached di-
rectly to the valve or at the double adapter
instead of a control thermostat.
See Data Sheet uT2176.
The Types43-1, 43-2, 43-5 and 43-7 Regu-
lators are not safety valves. If necessary, a
suitable overpressure protection must be in-
stalled on site in the plant section.
Note

3-2 EB 2171 EN
Design and principle of operation
Type43-2 Type43-1 Type43-7 Type43-5
Type2432 Valve (male thread) Type2431 Valve (female
thread)
Type2437 Valve (male
thread)
Type2435 Valve
(female thread)
Z
40
41
3
5
1.1
1.3
1
7
47
42
43
44
45
46
53
52
51
50
48
Type2430 Control Thermostat
Z
3
5
1
1.
3
1.
2
15
13
11
40
7
45
18
44 Operating bellows
45 Pin of operating element
46 Operating element
47 Capillary tube
48 Temperature sensor
50 Thermowell (optional)
51 Packing
52 Seal
53 Screw
ZConnection nut with seal and
welding end (optional)
1 Plug assembly
1.1 Balancing piston
1.2 Balancing bellows
1.3 Plug stem
3 Valve body
5Seat
7Seal
11 Guide nipple
13 Pin
15 Insulating pipe
18 Seal
40 Coupling nut
41 Lead-seal hole
42 Set point spring
43 Set point adjuster
Fig.3-1: Functional diagram of regulator, DN15 to 25·G½ to 1

EB 2171 EN 3-3
Design and principle of operation
3.1 Additional ttings
ÎSee Fig.3-2
Strainers
We recommend installing a SAMSON
strainer (2) upstream of the valve. It prevents
solid particles in the process medium from
damaging the regulator.
ÎDo not use the strainer to permanently
lter the process medium.
ÎSelect a strainer (mesh size) suitable for
the process medium.
Any impurities carried along by the process
medium may impair the proper functioning
of the regulator. We recommend installing a
strainer (e.g. SAMSON Type1NI) upstream
of the temperature regulator (uEB1010).
Note
Thermometer
Install a thermometer (4) downstream of the
regulator to monitor the temperature prevail-
ing in the plant.
Bypass and shut-off valves
We recommend installing a shut-off valve (1
and 6) both upstream of the strainer and
downstream of the regulator and installing a
bypass line. The bypass ensures that the
plant does not need to be shut down for ser-
vice and repair work on the regulator.
Insulation
Regulators can be insulated to reduce heat
energy transfer.
Refer to the instructions in the 'Installation'
section.
1623 54
1Shut-off valve
2Strainer
3Temperature regulator
4Thermometer
5Temperature sensor
6Shut-off valve
Fig.3-2: Installation example on a water-heated/steam-heated boiler

3-4 EB 2171 EN
Design and principle of operation
3.2 Technical data
The regulator nameplate provides informa-
tion on the regulator version (see the 'Mark-
ings on the device' section).
More information is available in Data Sheets
uT2171 and uT2172.
Process medium and scope of application
Temperature regulators for district heating
systems, heat generators, heat exchangers
and other HVAC and industrial applications.
The Types43-1, 43-2, 43-5 and 43-7 Tem-
perature Regulators are designed to main-
tain the temperature at the control thermostat
sensor to the adjusted set point.
−Types43-1 and 43-2 for gases and
liquids
−Types43-5 and 43-7 for steam
−Types43-1 and 43-2: max. temperature
up to 150°C/300°F
−Types43-5 and 43-7: max. temperature
up to 200°C/390°F
−Temperature set points from 0 to
150°C/32 to 300°F
−Valve sizes G½ to 1/½NPT to 1NPT
and DN15 to 50
−Pressure ratings PN25/Class150
and300/JIS20K
The regulators close when the temperature
rises.
Note
Conformity
The Types43-1, 43-2, 43-5 and 43-7 Regu-
lators bear both the CE and EAC marks of
conformity.
Testing according to DINEN
The Types43-1, 43-2, 43-5 and
Type43-7 Temperature Regulators
are tested by the German Technical
Inspectorate (TÜV) according to
DINEN14597 under the type
designation 2750-0. The registration
number is available on request.
Noise emissions
SAMSON is unable to make general state-
ments about noise emissions. The noise emis-
sions depend on the regulator version, plant
facilities, process medium and operating
conditions.
Leakage class
The metal-seated regulator has the leakage
class I according to IEC60534-4.
The soft-seated regulator has the leakage
class IV according to IEC60534-4.