EB 2178 EN
Translation of original instructions

Type 43-8 and Type 43-8 N Temperature Regulators with HydraulicController

Edition July 2024

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 inthese instructions are for illustration purposes only. The actual product may vary.
Î For the safe and proper use of these instructions, read them carefully and keep them forlater reference.
Î If you have any questions about these instructions, contact SAMSON‘s After-sales Service(aftersalesservice@samsongroup.com).

Documents relating to the device, such as the mounting and operating
instructions, are available on our website at www.samsongroup.com >Downloads > Documentation.

Definition of signal words! DANGER
Hazardous situations which, if not avoided,
will result in death or serious injury! WARNING
Hazardous situations which, if not avoided,
could result in death or serious injury! NOTICE
Property damage message or malfunction
Note
Additional information
Tip
Recommended action

EB 2178 EN

Contents

1
1.1
1.2
1.3

Safety instructions and measures....................................................................4
Notes on possible severe personal injury..........................................................7
Notes on possible personal injury....................................................................7
Notes on possible property damage.................................................................8

2
2.1
2.2
2.3

Markings on the device................................................................................10
Inscription....................................................................................................10
Location of the inscription..............................................................................11
Material identification number.......................................................................11

3
3.1
3.1.1

Design and principle of operation.................................................................12
Technical data..............................................................................................13
Process medium and scope of application.......................................................13

4
4.1
4.2
4.3
4.4

Measures for preparation.............................................................................17
Unpacking...................................................................................................17
Transporting and lifting.................................................................................17
Storage........................................................................................................17
Preparation for installation.............................................................................18

5
5.1
5.2
5.2.1
5.2.2
5.3
5.4

Mounting and start-up..................................................................................18
Assembling the valve, hydraulic controller and control thermostat.....................18
Mounting positions........................................................................................19
Installing the valve and hydraulic controller.....................................................19
Installing the control thermostat......................................................................21
Additional fittings..........................................................................................22
Start-up........................................................................................................23

6
6.1

Operation....................................................................................................24
Adjusting the set point at the control thermostat...............................................24

7
7.1
7.2

Servicing.....................................................................................................25
Tightening torques and lubricant....................................................................25
Preparation for return shipment......................................................................25

8

Malfunctions................................................................................................25

9
9.1
9.2

Decommissioning and removal.....................................................................27
Decommissioning..........................................................................................28
Disposal.......................................................................................................28

10
10.1

Appendix.....................................................................................................29
After-sales service and spare parts.................................................................29

11

Certificates...................................................................................................29

EB 2178 EN

Safety instructions and measures

1 Safety instructions and measures
Intended use
The Type 43-8 and Type 43-8 N (version for local heat supply) Temperature Regulator consistof the Type 2432 or 2432 N Valve, the Type 2438 Hydraulic Controller and the Type 2430
Control Thermostat. The regulator is designed for temperature control of the energy supply toheat generators (e.g. heat exchangers) by closing the valve. The regulator is mainly used tocontrol the temperature in instantaneous water heaters in small district heating units.
The devices are designed to operate under exactly defined conditions (e.g. operatingpressure, process medium, temperature). Therefore, operators must ensure that the devices
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 devices in applications orconditions other than those specified, contact SAMSON.
SAMSON does not assume any liability for damage resulting from the failure to use the device for its intended purpose or for damage caused by external forces or any other external
factors.
Î Refer to the technical data and inscription on the device for limits and fields of application as well as possible uses.
Reasonably foreseeable misuse
The devices are not suitable for use outside the limits defined during configuration and by thetechnical 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
Qualifications of operating personnel
The devices must be mounted, started up, serviced and repaired by fully trained and qualified personnel only; the accepted industry codes and practices are to 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
specialized training, their knowledge and experience as well as their knowledge of the applicable standards.

4

EB 2178 EN

Safety instructions and measures

Personal protective equipment
SAMSON recommends checking the hazards posed by the process medium being used (e.g.
u GESTIS (CLP) hazardous substances database).
Î Provide protective equipment (e.g. safety gloves, eye protection) appropriate for the process medium used.
Î Wear hearing protection when working near the valve. Follow the instructions given by
the plant operator.
Î Check with the plant operator for details on further protective equipment.
Revisions and other modifications
Revisions, 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. Furthermore, 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 operatingpressure or by moving parts by taking appropriate precautions. Plant operators and operating personnel must observe all hazard statements, warnings and caution notes in thesemounting and operating instructions.
Hazards resulting from the special working conditions at the installation site of the regulator
must be identified in a risk assessment and prevented through the corresponding safety instructions drawn up by the operator.
SAMSON also recommends checking the hazards posed by the process medium being used
(e.g. u GESTIS (CLP) hazardous substances database).
Î Observe safety measures for handling the device as well as fire prevention and explosion
protection measures.
These mounting and operating instructions deal with the standard version of the device.
Components of the device that differ to those used for the standard version described in thisdocument can be exchanged with other certain SAMSON components. The residual hazardsof these components are described in the associated mounting and operating instructions(see 'Referenced documents' chapter).

EB 2178 EN

5

Safety instructions and measures

Responsibilities of the operator
Operators are responsible for proper use 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, operators must ensure that operating personnel or third parties are not exposed toany danger.
Operators are additionally responsible for ensuring that the limits for the product defined in
the technical data are observed. This also applies to the start-up and shutdown procedures.
Start-up and shutdown procedures fall within the scope of the operator's duties and, as such,are not part of these mounting and operating instructions. SAMSON is unable to make any
statements about these procedures since the operative details (e.g. differential pressures andtemperatures) vary in each individual case and are only known to the operator.
Responsibilities of operating personnel
Operating personnel must read and understand these mounting and operating instructions aswell as the referenced documents and observe the specified hazard statements, warnings
and caution notes. Furthermore, operating personnel must be familiar with the applicablehealth, safety and accident prevention regulations and comply with them.
Referenced standards, directives and regulations
The devices comply with the requirements of the European Pressure Equipment Directive
2014/68/EU. Devices with a CE marking have an EU declaration of conformity, which includes information about the applied conformity assessment procedure. This EU declarationof conformity is included in the Appendix of these instructions (see Chapter 11).
Non-electric valve versions whose bodies are not lined with an insulating material coating do
not have their own potential ignition source according to the hazard assessment stipulated in
Clause 5.2 of ISO 80079-36, even in the rare incident of an operating fault. Therefore, suchvalve versions do not fall within the scope of Directive 2014/34/EU.
Î For connection to the equipotential bonding system, observe the requirements specified in
Clause 6.4 of EN 60079-14 (VDE 0165-1).
Referenced documents
The following documents apply in addition to these mounting and operating instructions:− Mounting and operating instructions for the valve u EB 2171
− Mounting and operating instructions for the control thermostat u EB 2430-3

6EB 2178 EN

Safety instructions and measures

1.1 Notes on possible severe personal injury! DANGER
Risk of bursting in pressure equipment.
Valves and pipelines are pressure equipment. Improper opening can lead to valve
components bursting.
Î Before starting any work on the valve, depressurize all plant sections affected aswell as the valve.
Î Drain the process medium from the plant sections affected as well as from thevalve.
Î Wear personal protective equipment.

1.2 Notes on possible personal injury! WARNING
Risk of personal injury due to residual process medium in the valve.
While working on the valve, residual process medium can escape and, depending on
its properties, may lead to personal injury, e.g. burns.
Î If possible, drain the process medium from the plant sections affected and from thevalve.
Î Wear protective clothing, safety gloves and eye protection.
Risk of burn injuries due to hot or cold components and pipelines.
Depending on the process medium, valve components and pipelines may get very hotor cold and cause burn injuries.
Î Allow components and pipelines to cool down or warm up to the ambient temperature.
Î Wear protective clothing and safety gloves.

EB 2178 EN

7

Safety instructions and measures! WARNING
Damage to health relating to the REACH regulation.
If a SAMSON device contains a substance listed as a substance of very high concern
on the candidate list of the REACH regulation, this is indicated on the SAMSON delivery note.
Î Information on the safe use of the part affected
u www.samsongroup.com/en/about-samson/environment-social-governance/material-compliance/

1.3 Notes on possible property damage! NOTICE
Risk of irreparable regulator damage caused by the regulator components being
taken apart.
The thermostat, set point adjuster and capillary tube form an inseparable hydraulicunit. 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 fulfill its monitoring
and control task.
Î Do not dismantle the regulator.
Î Only perform allowed activities on the regulator.
Î Contact SAMSON's After-sales Service before replacing spare parts.
Risk of valve damage due to contamination (e.g. solid particles) in the pipeline.
The plant operator is responsible for cleaning the pipelines in the plant.
Î Flush the pipelines before start-up.
Î Observe the maximum permissible pressure for valve and plant.
Risk of valve damage due to unsuitable medium properties.
The valve is designed for a process medium with defined properties.
Î Only use the process medium specified for sizing the equipment.

8

EB 2178 EN

Safety instructions and measures! NOTICE
Risk of leakage and valve damage due to over- or under-torquing.
Observe the specified torques when tightening valve components.
Excessive tightening torques lead to parts wearing out more quickly. Parts that are tooloose may cause leakage.
Î Observe the specified tightening torques.

EB 2178 EN

9Markings on the device

2 Markings on the device
There are several inscriptions on the device. The inscriptions are used to identify the separate
regulator components (see Fig. 1 to Fig. 3).
The inscription shown was up to date at the time of publication of this document. The inscription on the device may differ from the one shown.

2.1 Inscription
Inscription on the hydraulic controller
3–2

1 Date of manufacture

2438
PN 16
Fig. 1:2 Device index

1

3

SAMSON

Material number/configuration ID

Inscription on the Type 2438 Hydraulic Controller

Inscription on the control thermostat
1 Model number
2 Type designation
1
2
3

3 Material number/configuration ID

7

4 Temperature range in °C and °F

98

5 Register number (device function)
6 DIN-tested marking

4

7 Year of manufacture
6

5

8 –
9 CE marking

Fig. 2:

10

Inscription on the Type 2430 Control Thermostat

EB 2178 EN

Markings on the device

Valve inscription
1 Type designation (valve)
SAMSON
2710 -

Fig. 3:3

1

2 Date of manufacture

2

4 KVS/CV

4

5

6

7

3 Material number/configuration ID
5 Max. permissible temperature
6 Pressure rating (valve)
7 Max. perm. differential pressure ∆p

Inscription on the Type 2432/2432 N Valve

2.2 Location of the inscription
Location of theinscription

Location of theinscription

Top view
Type 2430

Fig. 4:

Location of the inscriptions on the bodies

2.3 Material identification
number
The material is indicated on the body of thevalve. Specifying the material number, you
can contact us to find out more details. The
configuration ID (3) is specified on the inscription.

EB 2178 EN

For more details on the inscription, see
Chapter 2.1.

11

Design and principle of operation

3 Design and principle of operation
The Type 43-8/43-8 N Regulator is used tocontrol the temperature of instantaneous water heaters in small district heating units.
The devices consist of the Type 2430 Control
Thermostat (30) operating according to thevapor pressure principle, the Type 2438 Hydraulic Controller (20) theType 2432/2432 N Valve (1).
The temperature sensor is filled with a liquid
which evaporates depending on the temperature. As a result, a pressure in proportion to the temperature is created in the sensor. This pressure is transferred through thecapillary tube (8) to the operating element(13) and converted into a positioning force,
which is compared to the force of the set
point spring (10).
The force ratio causes the plug in the valve(1) to move. Depending on the valve travel,an annular gap forms between the seat (2)and the plug (3) that determines the flowrate of the heating water.

The force of the compression spring causes
the valve plug to move in the closing direction and the heat flow is interrupted. At thesame time, the temperature set point of thethermostat drops by approx. 8 K (optionally
15 K) to reach the reduced idle temperature.
This prevents reheating with temperaturepeaks as well as the supply lines from cooling down.
This ensures that hot water is immediately
available for the next tapping.
Table 1: Domestic water quality
DHW
pH

Min. 7/max. 10

Chloride concentration

Max. 150 mg/l

–

HCO 3
SO 24

>1.5

Carbonate hardness

Min. 5° dH (German
hardness)

Total hardness

Max. 12° dH

A temperature increase at the sensor causes
the valve plug to close, thus reducing theflow rate of the heating water.
Upon tapping hot water, a pressure difference of ∆p = p1– p2 is created above thebaffle plate (6). The resulting force opposes
the force of the compression spring (7) thatacts in closing direction and causes the valve
to open. Once hot water tapping has been
completed, the pressure balance is restored.

12

EB 2178 EN

Design and principle of operation

3.1 Technical data
3.1.1

Process medium andscope of application

13
12
11

18

The Type 43-8/43-8 N Temperature Regulator is suitable for the control of liquids in instantaneous water heaters in small district
heating units.

10
9
19

For a temperature range from 45 to 65 °C
Valve DN 15 · PN 25 1) · Suitable for hot
water up to 130 °C 1)

8
15
17

_

1)

Type 43-8 N for local heat supply: PN 16 and120 °C onlyp

The valve closes when the temperature rises
above the set point of the Type 2430 Control
Thermostat.

7
6

1

p

2

Application range
The quality of the domestic water to be controlled determines the field of application of
the regulator. The water quality must meetthe following requirements (see Table 1).
Dimensions in mm · Weights in kg
The lengths and heights in the dimensional
drawing are shown in Fig. 6.

16
5
4
3
2

1
1

Valve body2

Valve seat

3

Plug

4

Plug stem

5

Valve spring

6

Baffle plate

7

Compression
spring8

Capillary tube

9

Set point adjuster

12

Pin of operating
element

13 Operating element
14

Cold water connection (corrugatedpipe) drawn turnedby 90°

15 Screw fitting
16 Fastening screws
19 Lead-seal hole
Hydrauliccontroller

10 Set point spring

20

11 Operating bellows

30 Control thermostat

Fig. 5:

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14

Sectional drawing

13

Design and principle of operation

Table 2: Technical data
Type 43-8
Valve

Type 43-8 N

Type 2432

Type 2432 N

Nominal size

DN 15

KVS coefficient

2.5

Pressure rating

PN 25

PN 16

Max. perm. differential pressure Δp

20 bar6 bar

Max. permissible valve temperature

130 °C

120 °C

Control thermostat

Type 2430

Set point range

45 to 65 °C

Capillary tube

2 m (5 m as special version)Max. perm. temperature at the sensor

30 K above the adjusted set point

Max. perm. temperature at the set point adjuster

35 °C

Perm. pressure at sensor

PN 40

Hydraulic controller
Required differential pressure (pressure loss)
across the control unit on the cold water side

Type 2438
0.4 bar with a tapping rate up to 10 l/minute
0.5 bar with a tapping rate up to 20 l/minutePressure rating

PN 16

Idle temperature

Approx. 8 K (optional 15 K) below the adjusted set
point

Min. temperature difference between flow
temperature and temperature set point
Max. flow rate

14

10 K
20 l/minuteEB 2178 EN

Design and principle of operation

Table 3: Materials · Material numbers according to DIN EN
Body
Valve seat
Valve plug

Type 43-8

Type 43-8 N

CC499K (red brass, Rg 5)

CW602N (hot-pressed brass)

Stainless steel 1.4305

CW602N

1.4104 and brass, resistant to dezincification, with EPDM soft seal

Valve spring and spring inType 2438

Stainless steel 1.4310

Baffle plate
Temperature
sensorPOM
Capillary tube

CopperSensor

CrNiMo steel

Set point adjuster

PETP, glass fiber reinforced

Table 4: Dimensions in mm · Weights in kg
Type 43-8
LengthL

Type 43-8 N
65

AF

30

HeightH1

Type 2432/Type 2432 N/
Type 2438/Type 2430

H

241

221

kg (approx.)

3.7

3.4

EB 2178 EN

30

15

Design and principle of operation

Dimensional drawings
Ø 12

65

G¾

190

G¾ /G1

Ø 76

19

15

H

35

G¾

H1

Ø 18
43 1)

Fig. 6:

16

L

Dimensional drawings for Type 43-8 and Type 43-8 N

EB 2178 EN

Measures for preparation

4 Measures for preparation
After receiving the shipment, proceed as follows:
1. Check the scope of delivery. Compare
the shipment received with the deliverynote.
2. Check the shipment for transportation
damage. Report any damage to
SAMSON and the forwarding agent(refer to delivery note).

4.1 Unpacking
Note
Do not remove the packaging until immediately before installation.
Proceed as follows to lift and install the device:
1. Remove the packaging from the device.

− Observe the permissible ambient temperatures (see Chapter 3.1).

4.3 Storage! NOTICE
Risk of temperature regulator damage due
to improper storage.
− Observe the storage instructions.
− Avoid longer storage periods.
− Contact SAMSON in case of different
storage conditions or longer storage
times.
Note
SAMSON recommends to regularly checkthe device and the prevailing storage conditions during long storage periods.
Storage instructions

2. Dispose of the packaging in accordancewith the valid regulations.

− Protect the temperature regulator
against external influences (e.g. impact).

4.2 Transporting and lifting− Protect the device against moisture anddirt. Store it at a relative humidity ofless than 75 %. In damp spaces, prevent condensation. If necessary, use adrying agent or heating.

Due to the low service weight, lifting equipment is not required to transport and lift theType 43-8 and Type 43-8 N Temperature
Regulators.
Transport instructions− Make sure that the ambient air is freeof acids or other corrosive media.

− Protect the device against external influences (e.g. impact).

− Observe the permissible ambient temperatures (see Chapter 3.1).

− Protect the device against moisture anddirt.

− Do not place any objects on the device.

EB 2178 EN

17

Mounting and start-up

Tip
Our after-sales service can provide more detailed storage instructions on request.

4.4 Preparation for installation
Proceed as follows:Î Check all connections for the valve, hydraulic controller and control thermostat.
Î Check all parts for damage.
Î Check to make sure that the type designation, pressure rating and temperature
range of the valve, hydraulic controller
and control thermostat match the plantconditions (pressure rating of the pipeline, medium temperature etc.).
Î Check any mounted thermometers tomake sure they function.

5 Mounting and start-up! NOTICE
Risk of overheating due to excessive ambient temperatures or insufficient heat dissipation when components are insulated.
− Do not include the temperature regulator in
the insulation of the pipeline.

5.1 Assembling the valve, hydraulic controller and control thermostat
The Type 43-8/Type 43-8 N Temperature
Regulator consists of the Type 2432/2432 N
Valve (1), Type 2438 Hydraulic Controller(20) and Type 2430 Control Thermostat(30).
The hydraulic controller and the control thermostat can be attached to the valve body either before or after the valve is installed in
the pipeline.
On installation, make sure that the temperature does not exceed the max. permissible
ambient temperature of 35 °C.
Install the plate heat exchanger in such a
way that the heating water flows verticallybetween the plates.
Heat exchanger connections
For district heating supply (heating water)and hot water (top connection),for district heating return (heating water)
and cold water (bottom connection)

18

EB 2178 EN

Mounting and start-up

5.2 Mounting positions
Install the Type 43-8 and Type 43-8 N in ahorizontal position with control thermostat
facing upward onto the heat exchanger.
Installation conditions− Install the heat exchanger in the uprightposition only with the heating water supply at the top (see Fig. 7).
− Choose a place of installation that allows
you to freely access the regulator evenafter the entire plant has been completed.
− Make sure the direction of flow matches
the direction indicated by the arrow on
the body.
− Install the regulator free of stress andwith the least amount of vibrations as
possible.
− Observe the permissible ambient temperature of max. 50 °C.

5.2.1

3. Attach the corrugated pipe (W) between
the hydraulic controller and cold water
connection of the heat exchanger. Observe the tightening torques specified in
Chapter 7.1.
4. When integrating a circulation pipe, thenecessary connection piece is available(accessories). It is mounted between theconnection of the hydraulic controller
and the corrugated pipe (W). Observe
the tightening torques specified in Chapter 7.1.
Older regulator versions are equippedwith a capillary tube instead of the corrugated pipe. The capillary tube (Ø18)
must only be used as a spare part.
5. Tighten the three side mounting screws(16) at the hydraulic controller. Observe
the tightening torques specified in Chapter 7.1.

Installing the valve andhydraulic controller

See Fig. 5 and Fig. 7.
1. Place the body of the hydraulic controller
on the valve connection. Slightly
hand-tighten the three side mounting
screws (16) so that that the hydrauliccontroller can still be rotated on thevalve.
2. Mount and align the valve with doublenut (D) at the heat exchanger. Observe
the tightening torques specified in Chapter 7.1.

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19

Mounting and start-up

To hot watertapping point

Heat exchanger
connections

View AA

Welding end

DDouble nut

F

Sensor pocketF

M Grub screw

5 mm

W Corrugated pipe

Heating
water
supplyConnections
G ¾ or G 1

Heat exchanger

View A
Notch

Cold water
connection

M

Hot
water

HW

HeatingColdwater return wateraA

Fig. 7:

W

D

Arrangement of Type 43-8/43-8 N with accessories (without circulation)

Table 5: Installation dimensions · Dimensions in mm
Type
a
HW
M

20

43-8

43-8 NG¾

40 to 45 mm

G1

73 to 79 mm≥260 mm≥240 mm
M5 grub screw

EB 2178 EN

Mounting and start-up

5.2.2

Installing the control
thermostat

Note
The Type 2430 is installed without thermowell.
To fully use the fast response behavior of thesensor (vapor pressure), the sensor must also
be installed at the best possible location.
In plate heat exchangers, this location is directly upstream of the outlet where the heated water flows out of the heat exchanger.
Î The notch at the end of the sensor must
point upward (see Fig. 8).

Plate heat exchanger

Î Install the sensor pocket (F) in such a waythat the sensor reaches horizontally into
the hot water duct.
Î Observe a distance of approx. 5 mm between the tip of the sensor and the rearof the housing.
Î After aligning the sensor, clamp it withthe threaded pin (M). Observe the tightening torques specified in Chapter 7.1.
Note
In hot water generating systems with instantaneous water heater, thermostatic mixer
faucets must not be installed downstream of
the temperature regulator as this may lead toan instable temperature control.

Hot water outlet
View Amax. ±5°5 mm
Adapter withtemperature sensor

View A
Temperature sensor, notch facing upward
Fig. 8:

Arrangement of Type 2430 Control Thermostat for Type 43-8/43-8 N

EB 2178 EN

21

Mounting and start-up! NOTICE
Risk of capillary tube damage due to incorrect handling.
− Do not shorten the capillary tube.
− Roll up excess tube to form a ring. The
smallest bending radius is 50 mm.
Note
Observe the permissible ambient temperature of max. 50 °C over the entire length ofthe capillary tube.

5.3 Additional fittings
Strainer
A strainer installed upstream in the flow pipe
holds back any dirt or other foreign particles
carried along by the medium. For example,
the SAMSON Type 1 NI Strainer is suitable(u T 1010).

− Install strainers in vertical pipelines withthe medium flowing upward with thedrain plug facing upward.
Tip
Remember to leave enough space to remove
the filter element for cleaning.
Shut-off valve
Install a hand-operated shut-off valve on theinlet and outlet sides. This allows the plant tobe shut down for cleaning and maintenance,
and when the plant is not used for longer
periods of time (see Fig. 9).
Thermometer
Install a thermometer both upstream anddownstream of the heat exchanger to monitor the temperatures prevailing in the plant(see Fig. 9).

The following points must be observed when
installing the strainer:− Do not use the strainer to permanently
filter the process medium.
− Install the strainer upstream of the regulator.
− Allow sufficient space to remove the filter.
− Observe the flow direction through thestrainer.
− In horizontal pipelines with gases or liquids, the filter element faces downward.
The filter element faces sideways in applications with steam.

22

EB 2178 EN

Mounting and start-up

5.4 Start-up
Fill the plant very slowly with the process medium on start-up.
! 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 hotor cold and cause burn injuries.
− Allow components and pipelines to cool
down or warm up to the ambient temperature.
− Wear protective clothing and safety gloves.

After assembling the control thermostat, hydraulic controller and valve, the Type 438/43-8 N Temperature Regulator can bestarted up.
Î Fill the plant very slowly with the process
medium on start-up.
Î Open the shut-off valves slowly preferably starting from the upstream pressureside.
Î Avoid pressure surges.

Domestic hot water heated in an instantaneous heating system with Type 43-8/43-8 N

FWV

T

RT
ASV

SF

TKW

HS
T

FWR

V

ASV
TWW
FWV

District heating supply

TKW

Cold water

FWR

District heating return

DHW

Domestic hot water

Fig. 9:RT

Control thermostat

HS

Hydraulic controller

V

Valve

WT

Heat exchanger

ASV

Shut-off valve

SF

Strainer

T

Thermometer

Domestic hot water heated in an instantaneous heating system

EB 2178 EN

23

Operation

6 Operation

To adjust the set point, proceed as follows:
1. Set the target temperature set point by
turning the black adjustment knob (9)according to the scale (see Fig. 10).

See Fig. 5.

6.1 Adjusting the set point at
the control thermostat− Turn the adjustment knob clockwise() to reduce the temperature set
point.

The ambient temperature at the set point adjuster must not be higher than 35 °C.

− Turn the adjustment knob counterclockwise () to increase the temperature set point.

The temperature set point is continuously adjustable.

2. Pull the wire through the lead-seal hole(19) at the control thermostat (30) andlead-seal it to fix the adjusted temperature set point.

Scale marking on thecontrol thermostat

Scale marking

4

4

3

3
2,5

2

2

1

1

0

0

40

45

50

60

65

Temperature set
point in °C

Fig. 10: Set point adjustment24

EB 2178 EN

Servicing

7 Servicing
The Type 43-8 and Type 43-8 N Temperature Regulators do not require much maintenance. Nevertheless, they are subject to natural wear, particularly at the soldered joints
and seals.
Note
The device was checked by SAMSON before
it left the factory.
− The product warranty becomes void ifservice or repair work not described inthese 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.

7.1 Tightening torques andlubricantÎ See Fig. 5 and Fig. 7
Part

Tightening
torque in Nm

Screw fitting (15)20

Fastening screws (16)2Connection nut on the welding end (A)80

Double nut (D)20Connection nut for the sensor
pocket (F)20

Grub screw on the sensor (M)1Connection nut on thecorrugated pipe (W)70

EB 2178 EN

7.2 Preparation for return shipment
Defective devices can be returned to SAMSON for repair. Proceed as follows to returndevices to SAMSON:
1. Put the device out of operation (seeChapter 9.1).
2. Remove any residual process medium.
3. Send the device together with the filled-inform to your nearest SAMSON subsidiary. SAMSON subsidiaries are listed on
our website at u www.samsongroup.com> Contact.
4. Continue as described on our website atu www.samsongroup.com > Service >After-sales Service > Returning goods.

8 Malfunctions
The malfunctions listed in Table 6 are causedby 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 repair work.
Depending on the operating conditions,check the temperature regulator at certain intervals to prevent possible failure before it
can occur. Plant operators are responsiblefor drawing up an inspection and test plan.

25

Malfunctions

Table 6: Troubleshooting
Malfunction

The temperature exceeds thetemperature adjusted at the control
thermostat.

The temperature is below thetemperature adjusted at the control
thermostat.

The temperature (adjusted at thecontrol thermostat) varies.

Leakage at the connection between
the hydraulic controller and valve orcontrol thermostat.

26

Possible reasons

Recommended action

Control thermostat defectiveÎ Replace the control thermostat.

Foreign particles blocking the valve
plugÎ Remove foreign particles.

Valve trim is worn out.

Î Replace damaged parts.

Valve too large for control task

Î Check the sizing.

Sensor is installed incorrectly.

Î Check the installation of the control
thermostat (see Chapter 5.2.2).

Insufficient heating energy availableÎ Draw up an energy balance.

Strainer blockedÎ Drain and clean filter of thestrainer.

The valve is not installed in the
direction indicated by the arrow.

Î Remove the valve and install it
again in the direction indicated by
the arrow.

A safety device (e.g. STL etc.) has
been triggered.

Î Check plant. Unlock safety device
or replace it.

Valve too small for control task

Î Check the sizing.

The valve is jammed.

Î Replace both seat and plug if oneof them is damaged or order a
new valve.

Hydraulic controller jammed.

Î Replace the hydraulic controller.

Valve too large for control task

Î Check the sizing.

The valve is not installed in the
direction indicated by the arrow.

Î Remove the valve and install it
again in the direction indicated by
the arrow.

Sensor is installed incorrectly.

Î Check the installation of the control
thermostat (see Chapter 5.2.2).

Increased friction, e.g. due to foreign
particles between seat and plug or in
the stem guide on the bonnet.

Î Remove foreign particles.
Î Replace damaged parts.

Î Replace damaged parts.

Î Replace damaged parts.
Seal is defective

Î Contact SAMSON's After-sales
Service.

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Decommissioning and removal

Tip
Note
Contact SAMSON's After-sales Service for
malfunctions not listed in the table.
Tip
SAMSON's After-sales Service can support
you in drawing up an inspection and test
plan for your plant.

9 Decommissioning andremoval! DANGER
Risk of bursting in pressure equipment.
Valves and pipelines are pressure equipment. Improper opening can lead to valve
components bursting.
− Before starting any work on the valve, depressurize all plant sections affected aswell as the valve.
− Drain the process medium from the plant
sections affected as well as from the valve.
− Wear personal protective equipment.
! WARNING
Risk of personal injury due to residual process medium in the valve.
While working on the valve, residual process
medium can escape and, depending on its
properties, may lead to personal injury, e.g.
burns.
− If possible, drain the process medium fromthe plant sections affected and from thevalve.
− Wear protective clothing, safety gloves andeye protection.

EB 2178 EN

27

Decommissioning and removal! 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 hotor cold and cause burn injuries.
− Allow components and pipelines to cool
down or warm up to the ambient temperature.
− Wear protective clothing and safety gloves.

9.1 Decommissioning
To decommission the temperature regulator
before removing it, proceed as follows:
1. Close the shut-off valve on the inlet side.
2. Close the shut-off valve on the outlet side.
3. Completely drain the pipelines, valve
and heat exchanger.
4. Depressurize the plant. Shut off or disconnect the control line, if installed.
5. If necessary, allow the pipeline and device to cool down or warm up to the ambient temperature.
6. Remove the control thermostat's sensor
from the pipeline and, if necessary, seal
the opening.
7. Remove the control thermostat from thehydraulic controller.
8. Remove the hydraulic controller from thevalve.

28

9.2 Disposal
SAMSON is a producer
registered at the following
European institution u https://www.samsongroup.com/en/
about-samson/environmentsocial-governance/materialcompliance/waste-electricaland-electronic-equipment-weeeand-its-safe-disposal/.
WEEE reg. no.: DE 62194439

Information on substances listed as
substances of very high concern (SVHC) on
the candidate list of the REACH regulation
can be found in the document "Additional
Information on Your Inquiry/Order", whichis added to the order documents, if
applicable. This document includes theassigned SCIP number, which can be enteredinto the database on the European
Chemicals Agency (ECHA) website(uhttps://www.echa.europa.eu/scipdatabase) to find out more information on
the SVHC.
Î Observe local, national and international refuse regulations.
Î Do not dispose of components, lubricantsand hazardous substances together withyour other household waste.
Note
SAMSON can provide you witha recycling passport according to
PAS 1049 on request. Simply e-mail us ataftersalesservice@samsongroup.com giving
details of your company address.

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Appendix

Tip
On request, SAMSON can appoint a service
provider to dismantle and recycle the product as part of a distributor take-backscheme.

− Configuration ID (Type 2438 HydraulicController)− Configuration ID (Type 2432/2432 N
Valve)− Upstream and downstream pressure− Min. and max. flow rate
− Set point range− Temperature

10 Appendix
10.1 After-sales service andspare parts
After-sales service
Contact SAMSON's After-sales Service forsupport concerning service or repair work or
when malfunctions or defects arise.
E-mail
You can reach our after-sales service ataftersalesservice@samsongroup.com.
Addresses of SAMSON AG and its subsidiaries
The 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.

− Is a strainer installed?
− Installation drawing showing the exact
location of the regulator and all the additionally installed components (control
thermostat, valve, shut-off valves, pressure gauge etc.)− Cold water connection with corrugatedpipe or capillary tube
− With or without circulation pipe
Spare parts
No spare parts are available for theType 43-8 and Type 43-8 N Temperature
Regulators.

11 Certificates
The EU declarations of conformity are included on the next pages.

Required specifications
Please submit the following details:− Order number and position number inthe order− Configuration ID (Type 2430 Control
Thermostat)

EB 2178 EN

29

Appendix

Modul H/Module H, Nr./No. / N° CE-0062-PED-H-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:
Ventile für Temperaturregler/Valves for temperature regulators
Typ/Type 2111, 2121, 2431, 2432, 2435, 2436, 2437 (Erz.-Nr./Model No. 2710), 2433, 2118 (2713), 2119 (2803), 2111, 2121 (2811), 2114
(2814)
die Konformität mit nachfolgender Anforderung/the conformity with the following requirement.
Richtlinie des Europäischen Parlaments und des Rates zur Harmonisierung der Rechtsvorschriftender 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 theMember States relating of the making available on the market of pressure equipment.

2014/68/EU

of 15 May 2014

Angewandtes Konformitätsbewertungsverfahren für Fluide nach Art. 4(1)(c.ii) und (c.i) zweiter
Gedankenstrich.

Modul siehe
TabelleConformity assessment procedure applied for fluids according to Article 4(1)(c.ii) and (c.i), second
indentSee table formoduledurch
certified by
Bureau Veritas
S. A. (0062)

NenndruckPressure rating
PN 16
PN 25
PN 40
Class 150
Class 300

DN
NPS

15
½

20
¾

25
32
40
50
65
1
1¼
1½
2
ohne/without (1)ohne/without (1)A (2)(3)ohne/without (1)A (2)(3)ohne/without (1)A (2)(3)ohne/without (1)A (2)(3)

80
100
3
4
A (2)(3)

125

H

150
6

200
8
H

H

H

250
10

H

(1) Das auf dem Stellgerät aufgebrachte CE-Zeichen hat keine Gültigkeit im Sinne der Druckgeräterichtlinie.
The CE marking affixed to the control valve is not valid in the sense oft the Pressure Equipment Directive.
(2) Das auf dem Stellgerät aufgebrachte CE-Zeichen gilt ohne Bezeichnung der benannten Stelle (Kenn-Nr. 0062).
The CE marking affixed to the control valve is valid without specifying the notified body (ID number 0062).
(3) Die Identifikationsnummer 0062 von Bureau Veritas S.A. gilt nicht für Modul A.
The identification number 0062 of Bureau Veritas S.A. is not valid for Modul A.
EU-Konformitaetserklaerung_Blatt-05_Modul-A_Modul-H_DE-EN_Rev.03_2017-02-08.docx

Geräte, denen laut Tabelle das Konformitätsbewertungsverfahren Modul H zugrunde liegt, beziehen sich auf die„Zulassungsbescheinigung eines Qualitätssicherungssystems“ ausgestellt durch die Notifizierte Stelle.
Devices whose conformity has been assessed based on Module H refer to the certificate of approval for the quality management system
issued by the notified body.

Dem Entwurf zu Grunde gelegt sind Verfahren aus:/The design is based on the procedures specified in the following standards:
DIN EN 12516-2, DIN EN 12516-3 bzw./or ASME B16.1, ASME B16.24, ASME B16.34, ASME B16.42
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
Zentralabteilungsleiter/Head of Central Department
Entwicklung Ventile und Antriebe/R&D, Valves and Actuators
SAMSON AKTIENGESELLSCHAFT
Weismüllerstraße 3 60314 Frankfurt am Main

30

Dr. Michael Heß
Zentralabteilungsleiter/Head of Central Department
Product Management & Technical Sales
Telefon: 069 4009-0 · Telefax: 069 4009-1507
E-Mail: samson@samson.de

Revision 03

EB 2178 EN

Appendix

Modul H/Module H, Nr./No. / N° CE-0062-PED-H-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:
Ventile für Temperaturregler/Valves for temperature regulators
Typ/Type 2431, 2432, 2435, 2436, 2437 (Erz.-Nr./Model No. 2710)
die Konformität mit nachfolgender Anforderung/the conformity with the following requirement.
Richtlinie des Europäischen Parlaments und des Rates zur Harmonisierung der Rechtsvorschriftender 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 theMember States relating of the making available on the market of pressure equipment.

2014/68/EU

of 15 May 2014

Angewandtes Konformitätsbewertungsverfahren für Fluide nach Art. 4(1)(c.i) erster Gedankenstrich.

Modul siehe
TabelleSee table formoduledurch
certified by
Bureau Veritas
S. A. (0062)

Conformity assessment procedure applied for fluids according to Article 4(1)(c.i), first indent.
NenndruckPressure rating
PN 16 (3) / PN 25
PN 40
Class 150
Class 300

DN
NPS

15
½

20
¾

25
1

32
1¼

ohne (1)ohne (1)ohne (1)ohne (1)

40
1½

50
2

65
-

80
3

100
4

A (2)(4)

125
-

150
6

200
8

250
10

300
12

H
A (2)(4)

400
16

-

H
H
H

(1) Das auf dem Stellgerät aufgebrachte CE-Zeichen hat keine Gültigkeit im Sinne der Druckgeräterichtlinie.
The CE marking affixed to the control device does not refer to the Pressure Equipment Directive.
(2) Das auf dem Stellgerät aufgebrachte CE-Zeichen gilt ohne Bezeichnung der Notifizierten Stelle (Kennr. 0062).
The CE marking affixed to the control device is valid, but does not refer to the notified body (ID No. is invalid).
(3) DN 15 auch in PN 16 lieferbar.
DN 15 as well in PN deliverable.

EU-Konformitaetserklaerung_Blatt-09_Modul-A_Modul-H_DE-EN_Rev.03_2017-02-08.docx(4) Die Identifikationsnummer 0062 von Bureau Veritas S.A. gilt nicht für Modul A.
The identification number 0062 of Bureau Veritas S.A. is not valid for Modul A.
Geräte, denen laut Tabelle das Konformitätsbewertungsverfahren Modul H zugrunde liegt, beziehen sich auf die„Zulassungsbescheinigung eines Qualitätssicherungssystems“ ausgestellt durch die benannte Stelle.
Devices whose conformity has been assessed based on Module H refer to the certificate of approval for the quality management system
issued by the notified body.

Dem Entwurf zu Grunde gelegt sind Verfahren aus:/The design is based on the procedures specified in the following standards:
DIN EN 12516-2, DIN EN 12516-3 bzw./or ASME B16.24, ASME B16.34
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
Zentralabteilungsleiter/Head of Central Department
Entwicklung Ventile und Antriebe/R&D, Valves and Actuators
SAMSON AKTIENGESELLSCHAFT
Weismüllerstraße 3 60314 Frankfurt am Main

EB 2178 EN

Dr. Michael Heß
Zentralabteilungsleiter/Head of Central Department
Product Management & Technical Sales
Telefon: 069 4009-0 · Telefax: 069 4009-1507
E-Mail: samson@samson.de

Revision 03

31

SAMSON AKTIENGESELLSCHAFT
Weismüllerstraße 3 · 60314 Frankfurt am Main, Germany
Phone: +49 69 4009-0 · Fax: +49 69 4009-1507
samson@samsongroup.com · www.samsongroup.com

2024-08-28 · English

EB 2178 EN