Samson series 43 Service manual
Mounting and
Operating Instructions
EB 2173 EN
Edition June 2016
Type43-3 Temperature Regulator with Type2430K Control Thermostat
Series43 Temperature Regulators
Type43-3
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 2173 EN
Note:
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 risk assess-
ment stipulated in EN13463-1:2009, section5.2, even in the rare incident of an
operating fault. Therefore, such valve versions do not fall within the scope of Directive
2014/34/EU.
For connection to the equipotential bonding system, observe the requirements speci-
ed in section 6.4 of EN60079-14: 2011 (VDE0165 Part 1).
Contents
EB 2173 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 ..................................................................5
3.1 Version with safety thermostat .........................................................................6
4 Installation....................................................................................................8
4.1 Installing the valve ..........................................................................................8
4.2 Temperature sensor ........................................................................................8
4.2.1 Capillary tube ...............................................................................................9
4.3 Strainer (lter)................................................................................................9
4.4 Additional components ...................................................................................9
5 Operation...................................................................................................11
5.1 Start-up .......................................................................................................11
5.2 Adjusting the set point ..................................................................................11
6 Maintenance ...............................................................................................13
7 Customer inquiries ......................................................................................13
8 Nameplate..................................................................................................14
9 Technical data.............................................................................................15
10 Dimensions .................................................................................................16
10.1 Dimension tables..........................................................................................17
4 EB 2173 EN
General safety instructions
1 General safety instructions
–The device must be mounted, started up or serviced by fully trained and
qualied 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 97/23/EC. The declaration of conformity issued for a regula-
tor bearing the CE marking includes information on the applied conformity
assessment 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 specications 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.
EB 2173 EN 5
Process medium and scope of application
2 Process medium and scope of application
Temperature regulators for mixing and diverting 1) service in heating or cooling installations
Temperature set points from 0 to 150°C · Valves G½ to G1 female thread · DN15 to 50
with welding ends, threaded ends, or anges · Nominal pressure PN25 · Suitable for liquids
up to 150°C
__
1) Diverting service only with male thread to attach welding ends, threaded ends, or anges
2.1 Transportation and storage
The devices must be carefully handled, transported, and stored. Protect the devices against
adverse inuences, such as dirt, moisture, or temperature outside the permissible ambient
temperature range from –20 to +80°C.
3 Design and principle of operation
See Fig.1.
The regulators consists of an unbalanced Type2433K Three-way Valve with the
Type2430K Thermostat attached to it.
The valve consists of the valve body designed either as a mixing or diverting valve and the
plug with plug stem.
The thermostat consists of the operating bellows, set point spring, capillary tube, and tem-
perature sensor.
Note:
Details on the Type2430K Thermostat with a temperature sensor working according
to the vapor pressure principle uEB2430-3.
6 EB 2173 EN
Design and principle of operation
The regulators consist of a three-way valve
made of red brass and a control thermostat
with set point adjuster, capillary tube, and
temperature sensor.
The Type2430K Thermostat is attached to
the valve body using the coupling nut.
The temperature regulators work according
to the adsorption principle.
The temperature of the controlled medium
creates a pressure in the sensor which is pro-
portional to the measured temperature. This
pressure is transferred through the capillary
tube (11) to the operating element (12) and
converted into a positioning force.
This force acts on the operating bellows (9)
and the pin of the operating element (10)
which moves the plug stem and plug (3). By
turning the set point adjuster (8), the point of
response is changed over the spring (7). As
a result, the valve plug moves through its
travel range within a higher or lower tem-
perature range measured by the sensor.
Depending on its plug arrangement, the
three-way valve is either used for mixing or
diverting service.
In mixing valves, the process media to be
mixed enter at valve ports A and B. The
combined ow exits the valve at port AB.
When the temperature rises, port A opens
and port B closes.
In diverting valves, in contrast, the process
medium enters at the valve port AB and the
partial ows exit at ports A and B. When the
temperature rises, port A closes and port B
opens.
3.1 Version with safety ther-
mostat
When a Type2403K Safety Thermostat is
attached to the valve or the regulator, this
combination functions as a safety tempera-
ture monitor (STM) or a temperature regula-
tor with safety temperature monitor (TR/
STM).
Details in Data Sheet uT2183 and Mount-
ing and Operating Instructions uEB2183.
When a Type2439K Safety Thermostat is
attached, this version functions as a safety
temperature limiter (STL). Details in Data
Sheet uT2185 and Mounting and Operat-
ing Instructions uEB2185.
Tested safety equipment (according to DIN
EN)
Note:
A SAMSON thermowell must be
used when a sensor in versions tested
according to DIN EN is used with a
thermowell.
EB 2173 EN 7
Design and principle of operation
Fig.1: Sectional drawings
A AB
1
3
2
4
5
11
7
8
9
10
12
A AB
(20Nm)
Diverting valveMixing valve
Type43-3
PlugarrangementDN32to50
Mixing valve Diverting valve
1 Valve body
2 Seat
3 Plug
4 Plug stem
5Coupling nut
7 Set point spring
8Set point adjuster
9Operating bellows
10 Pin of operating element
11 Capillary tube
12 Operating element
To Type2430K
Control Thermostat
8 EB 2173 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 tem-
perature does not fall below –20°C or ex-
ceed +80°C.
4.1 Installing the valve
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.
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.
–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 temperatures
up to 110°C.
–Make sure that the inlet and outlet ows
of the plant are correctly assigned to
ports A, B and AB according to Fig.2.
4.2 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 G½ or G¾ fe-
male thread (to match the screw gland) at
the place of installation.
ÎSeal the screw gland of the sensor.
EB 2173 EN 9
Installation
Installation with thermowell
When a thermowell is used, a welding sock-
et with G½ or G¾ female thread (to t the
thermowell) 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.
4.2.1 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 50mm.
4.3 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 downward.
Tip:
Remember to leave enough space to
remove the lter element for clean-
ing.
4.4 Additional components
We recommend installing a hand-operated
shut-off valve upstream of the strainer and
downstream of the regulator in each pipe to
be able to shut down the plant for cleaning
and maintenance, 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.
10 EB 2173 EN
Installation
Heating
Cooling
Fig.2: Arrangement of Type43-3 Temperature Regulator
B
AAB
B
AAB
AAB
B
B
AAB
B
AAB
B
AAB
AAB
B
B
AAB
Mixing valve
in the ow pipe
Mixing valve
in the ow pipe
in the return
ow pipe
in the return
ow pipe
Diverting valve
in the ow pipe
Diverting valve
in the ow pipe
in the return
ow pipe
in the return
ow pipe
Flow pipe
Return ow pipe
Flow pipe
Return ow pipe
Flow pipe
Return ow pipe
Flow pipe
Return ow pipe
Flow pipe
Return ow pipe
Flow pipe
Return ow pipe
Flow pipe
Return ow pipe
Flow pipe
Return ow pipe
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