Samson 43 Series, 43-2 N Mounting And Operating Instructions

Temperature Regulator Series 43
Type 43-2 N

Fig. 1 ⋅Type 4 3-2 N

Mounting and
operating instructions

EB 2186 EN

Edition July 2001

Design and principle of operation

1. Design and principle of operation

1.1 Temperature regulator

The temperature regulator consists of the
valve and the Type 2430 K Thermostat
which are screwed together.
The valve comprises the valve body, seat
and plug, the thermostat comprises opera­ting bellows, set point spring, capillary tube
and temperature sensor.

1.2 Version with double adapter
and/or manual adjuster

For measurement of an additional process
variable, the temperature regulator can be
equipped with a double adapter plus an addi-

The device may only be assembled, started up and operated by trained and

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experienced personnel familiar with this product.
According to these mounting and operating instructions, trained personnel is
referred to as 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.

Any hazards which could be caused by the process medium, the signal press-

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ure and moving parts of the control valve are to be prevented by means of ap­propriate measures.
In addition, it is necessary to make sure that the control valve is only used in
areas where the operating pressure and temperatures do not exceed the oper­ating values which are based on the valve sizing data submitted in the order.

Proper shipping and appropriate storage are assumed.

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tional thermostat, or with a manual adjuster.
For further details, refer to EB 2176 EN.

Principle of operation:

The temperature regulator works according
to the adsorption principle. The temperature
of the process medium produces a pressure
in the sensor, which is proportional to the
actual value. This pressure is transmitted via
the capillary tube (10) to the operating ele­ment (13) and converted into a positioning
force.
This force acts upon the operating bellows
(9) and the operating element pin (12) and
is passed on to the plug stem and plug (3).
Turning the set point adjuster (8) changes
the regulators point of response via the
spring (7). As a result, the valve plug passes
through its travel range within a higher or

2

EB 2186 EN

lower temperature range sensed by the sen­sor.

For thermostats working according to

Note:

the vapor pressure principle, refer to
EB 2430-3 EN.

Design and principle of operation

1.1
1

2

3

4
5

15

(20Nm)

7

Fig. 2 ⋅Sectional drawing

10

7

8

9

12

13

1 Valve body

1.1 Coupling nut with gasket and
accessory weld-on fittings
(must be ordered separately)

2Seat
3Plug
4Plug stem
5Valve spring
7Set point spring
8 Set point adjuster
9 Operating bellows
10 Capillary tube
12 Pin of operating element
13 Operating element
14 Lead bore
15 Coupling nut

EB 2186 EN

3