Samson series 43 Service manual

Mounting and
Operating Instructions
EB 2172 EN
Edition January 2015
Type43-5
Type43-7 with anged valve
body, DN32 to 50
Type43-6
Type43-7 with welding ends
Series43 Temperature Regulators
Type43-5 and Type43-7
Type43-6

Definition of signal words
DANGER!
Hazardous situations which, if not
avoided, will result in death or seri-
ous injury
WARNING!
Hazardous situations which, if not
avoided, could result in death or seri-
ous injury
NOTICE
Property damage message or mal-
function
Note:
Additional information
Tip:
Recommended action

2 EB 2172 EN

Contents
EB 2172 EN 3
1 General safety instructions.............................................................................4
2 Process medium and scope of application.......................................................5
2.1 Transportation and storage .............................................................................5
3 Design and principle of operation ..................................................................6
3.1 Version with safety thermostat .........................................................................6
3.2 Version with double adapter ...........................................................................6
4 Installation....................................................................................................8
4.1 Temperature sensor ........................................................................................8
4.1.1 Capillary tube ...............................................................................................9
4.2 Strainer (lter)................................................................................................9
4.3 Additional components .................................................................................10
5 Operation...................................................................................................10
5.1 Start-up .......................................................................................................10
5.2 Adjusting the set point ..................................................................................10
6 Maintenance – Replacing parts ....................................................................12
6.1 Cleaning or replacing the plug ......................................................................12
7 Customer inquiries ......................................................................................13
8 Dimensions .................................................................................................16
8.1 Dimension tables..........................................................................................17
9 Technical data.............................................................................................18
Contents Page

4 EB 2172 EN
General safety instructions
1 General safety instructions
–The device must be mounted, started up or serviced by fully trained and
qualied personnel only; the accepted industry codes and practices are to
be observed. Make sure employees or third persons are not exposed to any
danger.
–All safety instructions and warnings given in these mounting and operating
instructions, particularly those concerning installation, start-up and mainte-
nance, must be strictly 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 dangers due to their specialized training, their
knowledge and experience as well as their knowledge of the applicable
standards.
–The devices comply with the requirements of the European Pressure Equip-
ment Directive 2014/68/EU. Devices with a CE marking have a declaration
of conformity, which includes information about the applied conformity as-
sessment procedure. This declaration of conformity can be provided on re-
quest.
–To ensure appropriate use, only use the device in applications where the op-
erating pressure and temperatures do not exceed the specications used for
sizing the device at the ordering stage.
–The manufacturer does not assume any responsibility for damage caused by
external forces or any other external factors.
–Any hazards that could be caused in the temperature regulator by the pro-
cess medium, operating pressure or by moving parts are to be prevented by
taking appropriate precautions.
–Proper transport, storage, installation, operation and maintenance are as-
sumed.
Testing according to DINEN
The Type43-5, Type43-6 and Type43-7 Temperature Regulators are
tested by the German Technical Inspectorate (TÜV) according to
DINEN14597. The register number is available on request.

EB 2172 EN 5
Process medium and scope of application
2 Process medium and scope of application
Temperature control in heat generators or heat exchangers by closing and opening a valve
(Series43).
For set points from 0 to 150°C · Valves G½ to 1 and DN15 to 150 · PN25 · Max. 200°C
Liquids and steam up to 200°C and non-ammable gases up to 80°C · For plants to be
heated or cooled.
2.1 Transportation and storage
The devices must be carefully handled, transported and stored. Protect the devices against
adverse inuences, such as dirt, moisture or temperature outside the maximum ambient tem-
perature range from –20 to +80°C.

6 EB 2172 EN
Design and principle of operation
3 Design and principle of oper-
ation
See Fig.1.
The regulators consist of a Type2436K
Globe Valve (Type43-6), Type2435K
Globe Valve (Type43-5) or Type2437K
(Type43-7) and a Type2430K Control
Thermostat with set point adjuster, capillary
tube and a temperature sensor working ac-
cording to the adsorption principle.
Note:
Details on the Type2430K Thermo-
stat with a temperature sensor work-
ing according to the vapor pressure
principle uEB2430-3.
The bodies are available made of red brass,
spheroidal graphite iron or stainless steel.
See Data Sheet uT2176 for versions with
double adapter or manual adjuster for the
attachment of additional control thermostats
The Type2430K Thermostat is attached to
the valve body using the coupling nut.
The temperature regulators work according
to the adsorption principle. The temperature
of the measured medium creates a pressure
in the temperature sensor which is propor-
tional to the measured temperature. This
pressure is transferred through the capillary
tube (10) to the operating element (13) and
converted into a positioning force. This force
causes the pin of the operating element (12)
to move the plug stem (4) with the valve
plug. By turning the set point adjuster (8),
the point of response is changed over the
valve spring (5).
The valves are balanced by a balancing bel-
lows (3.1). The balancing bellows counter-
balances any changes in pressure upstream
of the valve since the upstream pressure also
acts on the inside of the bellows through a
hole in the valve plug (3).
The Type43-5 and Type43-7 Regulators are
suitable for plants to be heated. The valves
close when the temperature rises.
The Type43-6 Regulator has a valve which
opens as the temperature rises. This regula-
tor is therefore suitable for plants to be
cooled.
3.1 Version with safety ther-
mostat
When a Type2439K/2403K Safety Ther-
mostat is attached to the valve or the regula-
tor, this combination functions as a safety
temperature limiter (STL) or a temperature
regulator with safety temperature limiter (TR/
STL).
Details in mounting and operating instruc-
tions uEB2185.
3.2 Version with double
adapter
The temperature regulator can be equipped
with a double adapter to connect an addi-
tional thermostat to control a further control
variable.
Details in mounting and operating instruc-
tions uEB2176.


EB 2172 EN 7
Design and principle of operation
Fig.1: Functional diagram
Type43-6
Type2436K Valve
Type43-5
Type2435K Valve (female thread)
Type43-7
Type2437K Valve
1.1 1
2
3
4
5
1.3
4.1
6
15
3.1
12
1.2
6
15
14
7
8
9
12
13
10
4
1
3.1
3
2
1 Valve body
1.1 Connection nut with seal
and welding end
1.2 Stopper
1.3 Insulating pipe
2 Seat
3 Plug
3.1 Balancing bellows
4 Plug stem
4.1 Pin
5 Valve spring
6 Guide nipple
7 Set point spring
8Set point adjuster
9Operating bellows
10 Capillary tube
12 Pin of operating element
13 Operating element
14 Lead-seal hole
15 Coupling nut
The valve closes when the temperature rises
Type 2430K
Control Thermostat
The valve opens when the temperature rises
Tightening torque:
20Nm

8 EB 2172 EN
Installation
4 Installation
Choose a place of installation that allows
you to freely access the regulator even after
the entire plant has been completed. Make
sure that the permissible ambient tempera-
ture does not fall below –20°C or exceed
+80°C.
Flush the pipeline thoroughly before install-
ing the regulator to ensure that any sealing
parts, weld spatter and other impurities car-
ried along by the process medium do not im-
pair the proper functioning of the valve,
above all the tight shut-off.
Note:
Type43-5/Type43-7: If the valve is
to be insulated, two thirds of the insu-
lating pipe (1.3) must remain uninsu-
lated.
–Install the valve free of stress and with the
least amount of vibrations as possible.
–The ow of direction must correspond
with the direction indicated by the arrow
on the valve body.
–The control thermostat must be suspend-
ed to hang downward. Other mounting
positions are possible for Type43-6 up
to 110°C.
NOTICE
Malfunction and damage due to ad-
verse effects of weather conditions
(temperature, humidity).
Do not install the temperature regula-
tor outdoors or in rooms prone to
frost. If such a location cannot be
avoided, protect the regulator
against freezing up if the process
medium owing through the valve
can freeze up. Either heat the regula-
tor or remove it from the plant and
completely drain the residual medi-
um.
4.1 Temperature sensor
NOTICE
Galvanic corrosion due to incorrectly
selected materials of the mounting
parts.
On installing the sensor or thermow-
ell, only combine the same kind of
materials (e.g. stainless steel with
stainless steel or copper together with
other copper materials).
The temperature sensor may be installed in
any position even when a thermowell is
used. However, make sure its entire length is
immersed in the process medium to be con-
trolled. It must be installed in a location
where overheating or considerable idling
times cannot occur.
Note:
If the sensor is to be used with a ther-
mowell, only use original SAMSON
thermowells.
Weld a welding socket with G½ or G¾ fe-
male thread (to match the screw gland) at
the place of installation.
ÎSeal the screw gland of the sensor.



EB 2172 EN 9
Installation
Installation with thermowell
When a thermowell is used, a welding sock-
et with G1 female thread must be used.
ÎSeal the thermowell into the welding
socket. Insert the sensor and tighten it
with the clamping screw.
Note:
For temperature regulators with safe-
ty temperature limiter (TR/STL), install
the sensor of the limiter near the sen-
sor of the regulator.
4.1.1 Capillary tube
Carefully run the capillary tube without
bending or twisting it. Avoid locations with
considerable ambient temperature uctua-
tions along the entire length of the tube.
Note:
Do not damage or shorten the capil-
lary tube. Roll up any capillary tube
that is not used. The smallest permis-
sible bending radius is 50mm.
4.2 Strainer (lter)
Install the strainer upstream of the tempera-
ture regulator.
–The ow of direction must correspond
with the direction indicated by the arrow
on the body.
–The lter element must be installed to
hang downwards.
Tip:
Remember to leave enough space to
remove the lter element for clean-
ing.


Fig.2: Typical installations
Type43-5/43-7 in a steam-heated boiler
Type43-6 in a cooler
1 Shut-off valve
2 Strainer
3 Temperature regulator
4 Thermometer
5 Temperature sensor
1123
54
12354

10 EB 2172 EN
Operation
4.3 Additional components
We recommend installing a hand-operated
shut-off valve upstream of the strainer and
downstream of the regulator to be able to
shut down the plant for cleaning and mainte-
nance, and when the plant is not used for
longer periods of time.
To check the adjusted set point, we recom-
mend installing a thermometer immersed in
the medium to be controlled near the sensor.
5 Operation
See Fig.1.
5.1 Start-up
ÎPut the temperature regulator into opera-
tion after mounting the valve and control
thermostat.
ÎFill the plant slowly with the process me-
dium (without pressure surges).
Slowly open the hand-operated shut-off
valve downstream of the valve and then
the shut-off valve upstream of the valve.
ÎCheck the adjusted temperature set point
at the thermometer installed near the
temperature sensor.
5.2 Adjusting the set point
To adjust the set point, turn the black plastic
adjuster while watching the reference ther-
mometer.
–Turn clockwise () to reduce the tem-
perature.
–Turn counterclockwise () to increase the
temperature.
The adjustment diagrams (see Fig.3) can be
used as a guide to nd the rst approximate
value.
Tip:
Higher set point temperatures can be
adjusted in increments as required.
However, to lower the set point tem-
perature, proceed in steps of 10 to
20°C. When doing so, wait for the
process medium to cool down before
continuing. Watch the thermometer.
Table1: Set point ranges
Set point
range in °C
Set point change
per turn
Sensor Ø
0 to 35°C 2.5°C 9.5mm
2°C 16mm
25 to 70°C 3°C 9.5mm
2°C 16mm
40 to 100°C 4°C 9.5mm
3°C 16mm
50 to 120°C 4°C 9.5mm
4.5°C 16mm
70 to 150°C 4.5°C 9.5mm
5°C 16mm

EB 2172 EN 11
Operation
Fig.3: Adjustment diagrams
˚C
150
140
120
100
80
60
40
20
00123401234
˚C
150
140
120
100
80
60
40
20
00123401234
70...150
50...120
40...100
25...70
0...35
˚C
150
140
120
100
80
60
40
20
0
70...150
50...120
40...100
25...70
0...35
70...150
50...120
40...100
25...70
0...35
˚C
150
140
120
100
80
60
40
20
0
70...150
50...120
40...100
25...70
0...35
Scale marking
Scale marking
Type43-5/43-7
Type43-6
Set point ranges for DN15 to 25
with sensor Ø 9.5mm
Set point ranges for DN32 to 50
with sensor Ø 16mm
Set point ranges for DN15 to 25
with sensor Ø 9.5mm
Set point ranges for DN32 to 50
with sensor Ø 16mm

12 EB 2172 EN
Maintenance – Replacing parts
6 Maintenance – Replacing
parts
See Fig.1.
The temperature regulators do not require
any maintenance. Nevertheless, they are
subject to natural wear, particularly at the
seat and plug.
Depending on the operating conditions,
check the regulator at regular intervals to
avoid possible malfunctions.
If the temperature exceeds the value adjusted
at the temperature sensor, possible causes
for this are:
–The thermostat is defective due to exces-
sive temperatures.
–Valve seat and plug are contaminated
with dirt.
–Seat and plug leak due to natural wear.
Before performing any work on the tempera-
ture regulator, we recommend removing the
valve from the pipeline.
WARNING!
Risk of injury due to process medium
escaping possibly under pressure.
Depressurize the relevant section of
the pipeline and, if necessary, drain
it as well. When used at high tem-
peratures, allow the plant section to
cool down to ambient temperature.
Exceptional operating and installation condi-
tions can lead to changed situations that
may affect the control response and lead to
malfunctions. In such cases, check the instal-
lation conditions, process medium, tempera-
ture and pressure conditions.
For initial evaluation of faults and how to
remedy them, refer to Table2 on
page14.
The table is not intended to be exhaustive as
there are diverse reasons for malfunctions.
6.1 Cleaning or replacing the
plug
To change the plug (3), a special plug
wrench is needed:
For DN15 to 25 Order no.: 1280-3001
For DN32 to 50 Order no.: 1280-3007
To change the seat (2), a special seat wrench
is needed:
For DN15 to 25 Order no.: 1280-3012
For DN32 to 50 Order no.: 1280-3013
The tools are available from SAMSON.

EB 2172 EN 13
Customer inquiries
Procedure
Types43-5 and 43-7
1. Unscrew the coupling nut (15) and re-
move the control thermostat.
2. Unscrew the guide nipple (6) and insulat-
ing pipe (1.3) from the valve body.
3. Use the plug wrench to pull out the entire
plug section.
4. Thoroughly clean the seat (2) and plug
(3). If the seat is damaged, it must be re-
placed using the seat wrench. If the plug
is damaged, the entire plug section as
well as the seal in the body must be re-
newed.
Type43-6
1. Unscrew stopper (1.2) and pull out the
entire plug section.
2. Thoroughly clean the seat and plug. If
the seat is damaged, it must be replaced
using the seat wrench.
If the plug is damaged, the entire plug
section as well as the seal in the body
must be renewed.
To reassemble, proceed in reverse order. If
necessary, insert a new seal for the plug sec-
tion into the body. Screw in the plug section
(tightening torque approx. 80Nm).
Connect the thermostat and valve using the
coupling nut (15). Tightening torque approx.
20Nm.
7 Customer inquiries
If malfunctions or defects occur, contact the
SAMSON After-sales Service department for
support.
Please send your inquiries to: kundendienst@
samson.de
The addresses of SAMSON AG, its subsid-
iaries, representatives and service facilities
worldwide can be found on the SAMSON
website (uwww.samson.de), in all
SAMSON product catalogs or on the back
of these Mounting and Operating Instruc-
tions.
To assist diagnosis, specify the following de-
tails:
–Type and nominal size of the valve,
Type ... Thermostat
–Model number with index
–Upstream and downstream pressure
–Temperature and process medium
–Min. and max. ow rate
–Is a strainer installed?
–Installation drawing showing the exact
location of the regulator and all the ad-
ditionally installed components (shut-off
valves, thermometer, etc.).

14 EB 2172 EN
Customer inquiries
Table2: Troubleshooting
Type43-5 and Type43-7
Possible reasons Recommended action
Temperature at the sensor exceeds the set point
Leak at seat and plug Remove valve from the pipeline and clean seat and plug. Renew plug,
if necessary. If this is not possible, return regulator to SAMSON for re-
pair.
Size (DN or G) of the valve is much too
large for the control task. Recalculate KVS and select a smaller valve.
Sensor installed in the wrong location. The entire length of the temperature sensor must be immersed in the
process medium and where idle times or heat buildup cannot occur.
Change mounting position accordingly.
A safety device (e.g. STL or STM) has been
triggered.
Check plant. Unlock safety device.
Thermostat defective Replace thermostat (read specications on the nameplate).
Temperature at the sensor does not reach the set point
Size (DN or G) of the valve is much too
small for the control task.
Recalculate KVS and select a larger valve.
Insufcient heating energy available Draw up an energy balance.
Strainer blocked Drain and clean lter of the strainer.
The valve is not installed in the direction
indicated by the arrow.
Install the valve in such a way that the ow of direction corresponds
with the direction indicated by the arrow on the valve body.
Control loop hunts·Very long dead time/sluggish control response
Size (DN or G) of the valve is much too
large for the control task.
Recalculate KVS and select a smaller valve.
Time constant is too large for the control
loop.
Fill the thermowell with thermal paste, remove thermowell or use sen-
sor with smaller time constant.
Sensor installed in the wrong location. The temperature sensor may be installed too far from the area where
the temperature to be controlled arises. Locate the sensor closer to heat
exchanger.
The valve is not installed in the direction
indicated by the arrow.
Install the valve in such a way that the ow of direction corresponds
with the direction indicated by the arrow on the valve body.

EB 2172 EN 15
Customer inquiries
Type43-6
Possible reasons Recommended action
Temperature at the sensor exceeds the set point
Size (DN or G) of the valve is much too
small for the control task.
Recalculate KVS and select a larger valve.
Thermostat defective Replace thermostat (read specications on the nameplate).
Insufcient cooling energy available Draw up an energy balance.
Strainer blocked Drain and clean lter of the strainer.
Sensor installed in the wrong location. The entire length of the temperature sensor must be immersed in the
process medium and where idle times or heat buildup cannot occur.
Change mounting position accordingly.
Temperature at the sensor does not reach the set point
Leak at seat and plug Remove valve from the pipeline and clean seat and plug. Renew plug,
if necessary. If this is not possible, return regulator to SAMSON for re-
pair.
Valve too large for control task Recalculate KVS and select a smaller valve.
A safety device (e.g. STL, STM etc.) has
been triggered.
Check plant. Unlock safety device.
Control loop hunts·Very long dead time/sluggish control response
Size (DN or G) of the valve is much too
large for the control task.
Recalculate KVS and select a smaller valve.
Time constant is too large for the control
loop.
Fill the thermowell with thermal paste, remove thermowell or use sensor
with smaller time constant.
The valve is not installed in the direction
indicated by the arrow.
Install the valve in such a way that the ow of direction corresponds
with the direction indicated by the arrow on the valve body.
Sensor installed in the wrong location. The temperature sensor may be installed too far from the area where
the temperature to be controlled arises. Locate the sensor closer to heat
exchanger.

16 EB 2172 EN
Dimensions
8 Dimensions
Fig.4: Dimensions
L3
H
~95
L
30260
185(220)
185(220)
G½
(G¾)
Ø12(Ø19)
Ø9.5(Ø16)
210 95
L
L1
dR
185(220)
185(220)
G½
(G )
Ø12(Ø19) Ø9.5(Ø16)
SW
34
190 46
L
dR
L1
L
30
(55)
260
(310)
Ø12(Ø19) Ø9.5(Ø16)
185(220)
185(220)
G½
(G )
34
Type43-5·G½ to G1 Type43-6·DN32 to 50
Version with welding ends
Type43-5 Type43-7·Version with welding ends
Type43-6 and Type43-7·Special versions (welding ends, anges, anged valve body)
Values in parentheses for
DN32 to 50
Values in parentheses
for DN32 to 50

EB 2172 EN 17
Dimensions
8.1 Dimension tables
Dimensions in mm and weights in kg
Table3: Type43-6 (DN32 to 50) and Type43-7 (DN15 to 50)
Valve size DN15 DN20 DN25 DN32 DN40 DN50
Pipe Ø d 21.3 26.8 32.7 42 48 60
Connection R G¾ G1 G1¼ G1¾ G2 G2½
AF 30 36 46 59 65 82
Length L 65 70 75 100 110 130
L1 with welding ends 210 234 244 268 294 330
Weight 1) in kg (approx.) 2 2.3 2.8 4.7 5.1 7.5
Special versions
With threaded ends (male thread)
Length L2 129 144 159 180 196 228
Male thread A G½ G¾ G1 G1¼ G1½ G2
Weight 1) in kg (approx.) 2 2.3 2.8 4.7 5.1 7.5
With anges2) (PN16/25)
Length L3 130 150 160 180 200 230
Weight 1) in kg (approx.) 3.1 3.9 4.6 7.6 8.4/9.83) 11.4/14.13)
1) Version without thermowell: minus 0.2kg
2) Valve also with anged body
3) Flanged body
Table4: Type43-5 and Type43-6
(G½ to 1)
Connection G½ G¾ G1
Length L 65 75 90
Tempera-
ture regu-
lators
Weight in kg (approx.)·Version with
bulb sensor and thermowell1)
Type43-5 1.8 1.9 2
Type43-6 1.8 1.9 2
1) Version without thermowell: minus 0.2kg
Table5: Type43-6 and Type43-7·Special
version with anged body
Temperature
regulators DN Height H Sensor Ø
Type43-6 Without
separat-
ing piece
15 to 25 190 Ø9.5
Type43-6 32 to 50 210 Ø12
Type43-7 With
separating
piece
15 to 25 260 Ø9.5
Type43-7 32 to 50 310 Ø12

18 EB 2172 EN
Technical data
9 Technical data
Table6: Technical data · All pressures in bar (gauge)
Temperature regulators Type43-6 43-5 43-7
Valve 2436K 2435K 2437K
Thread size G½ to 1 G½ to 1 –
Nominal size DN32 to 50 – DN15 to 50
Flanged body (special version) DN15 to 50 – DN15 to 50
Nominal pressure PN 25
Max. permissible differential pressure ∆p With corrosion-resistant operating bellows: 16bar2)
Perm. permissible temperature range of
valve 0 to 150°C1) 0 to 200°C
Type 2430K Control Thermostat
Set point range3) Continuously adjustable: 0 to 35°C, 25 to 70°C, 40 to 100°C, 50 to
120°C or 70 to 150°C
Capillary tube 2m (5m as special version)
Max. permissible temperature at sensor 50K above the adjusted set point
Permissible ambient temperature range –20 to 80°C
Permissible pressure at sensor/
thermowell PN25/PN40
1) With intermediate insulating piece –15 to 150°C
2) Types43-6, 43-7: max. 8bar
3) Further set point ranges on request
Table7: KVS coefcients
KVS coefcients for ...
Thread size G½ G¾ G1 –
Valve size DN151) 2) DN201)DN251) 2) DN321) DN401) DN501)
KVS coefcient 3.2 4.0 5.0 12.5 16 20
Special version 0.4·1.0·2.53) –
1) Flanged body of spheroidal graphite iron, Type43-6/43-7 (special version)
2) Flanged body of stainless steel, Type43-6 (special version)
3) On request

SAMSON AG · MESS- UND REGELTECHNIK
Weismüllerstraße 3 · 60314 Frankfurt am Main, Germany
Phone: [phone] · Fax: [phone]
[email protected] · www.samson.de
EB 2172 EN 2015-08-20 · English