T 3120 EN
Series 45, 46, 47 and 48 Self-operated Differential Pressure and Flow Regulators
as well as Combined Reguators

PN 10 to 25
G 3/8 to G 2
DN 15 to 50–10 to 150 °C

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

Edition July 2021

Table 1: Differential pressure and flow regulators

Valve

Can beused forWater, liquids

•

•

•

Mineral oil•

1)Air, non-flammable gases•

Differential
pressure ΔpFlow rate V
Application

•

•

•

•

Installation in

•

DN 15

DN 32 to 50 (EN-GJS-400-18-LT)–

16 2) · 25

25

16 2) · 25

CC499K

•

•

•

•

•

EN-GJS-400-18-LT

•

•

•

•

•

PN

Control

25

10
•

•

•

•

•

•

•
–

Liquids up to 150 °C (PN 25) or 130 °C (PN 16)
Non-flammable gases up to 80 °C

Max. permissible temperature

110 °C · 80 °C

•

•

•

•

•

Short circuit/bypass•Limitation
Control
Limitation
Flow pipe
Return flow pipe
Fixed set point

•
•

•

•

Adjustable

•

•

•

Min.

0.1

0.2

0.1

0.1

0.5

4.0

0.5

4.0

45-1

45-2

45-3

Data Sheet

3)

3)

0.15
0.3

45-4

45-6

u T 3124

PN 16 not for mineral oil
DN 15 to 25 only

3)
4)

•

•

Max.

Type

2)

•

•

DN 15 to 50 (CC499K)

Flanges

Body material

1)

•
•

Threaded ends

Pressure rating

Δp in bar•

Welding ends

Valve
size

Set point•1)

45-1 Nu T 3226

45-3 Nu T 3140

For valve sizes DN 32 to 50, the lower range value of the set point
range is 0.2 bar
Flow rate control of water from 0.01 to 15 m³/h

Table 2: Combined regulators for differential pressure, flow rate and temperature
Type 2430 Control Thermostat

Safetythermostat

Type
Data Sheet

2

Type 2403

Adjustable set point from 0 to 35 °C · 25 to 70 °C · 75 to 100 °C · 100 to 120 °C•––

Safety temperature monitors (STM) · Limits 60 to 75 °C · 75 to 100 °C · 100 to 120 °C•–

Type 2439

Safety temperature limiters (STL) · Limits 40 to 95 °C · 70 to 120 °C
2469/2430

2479/2430

2469/2430/2403

2469/2430/2439

u T 3132

T 3120 EN

Differential pressure and flow regulators
•

•

•

•

•

•

•

•

•

1)

•

1)

•

1)

•

1)

•

1)

•

1)

•

1)

•

•

•

•

•

•

•

•

•

DN 15 to 50 (CC499K)

•

•

•

•

DN 15

DN 32 to 50 (EN-GJS-400-18-LT)–

16 2) · 25

10

•

•

•

•

•

•

•

•

•

•

•

–

Liquids up to 150 °C (PN 25) or 130 °C (PN 16)
Non-flammable gases up to 80 °C
•
•

•

•

•

110 °C · 80 °C

•

•

•

•

•

•

•

•
•

•

•

•

•

•

•
–

•

•

0.2

4)

– 4)

0.5

45-9

46-5

u T 3128

•
•

•
•

•

0.1
46-7

u T 3130

•

•

•

•

•
0.2

3)

2.0
46-6

•

0.5
47-1

47-4

47-5

46-5 Nu T 3131u T 3134

Table 3: Combined self-operated regulator for flow rate and temperature with additional electric actuator•••

Flow pipe•••

Return flow pipe

•

•

•

Adjustable

•

•

•

Type 5857 Electric Actuator

–

•

–

Type 5824 Electric Actuator

•

–

•

Type 5825 Electric Actuatorwith fail-safe action

•

–

•

Type

2488/582x

2488 N/5857

2489/582x

Data Sheetu T 3135

u T 3136

u T 3135

Flow control V
Temperature control
Installation in
Set point V•

Type 2430 Control Thermostat

T 3120 EN•

3

Design and principle of operation (see Fig. 1)·
V = K · ∆prestriction

^

K·

·2
Fm or V = K´· ∆p ^ K´· Fm

DesignThe Series 45, 46, 47 and 48 Regulators are proportional
regulators controlled by the process medium. Each deviationfrom the adjusted set point is assigned a certain plug position.
The differential pressure Δp to be controlled generates a force
Fm at the diaphragm surface of the actuator which is proportional to the actual value (controlled variable x). This force iscompared to the spring force FS (set point w) at the plug stem.
It can be adjusted at the set point adjuster. The spring force
corresponds to the set point and can be adjusted at the set
point adjuster. When the differential pressure Δp and thus theforce Fm change, the plug stem is moved until Fm = FS.
The flow rate is controlled according to the differential pressure method.
The control accuracy and stability depend on the disturbancesthat occur. The regulators are designed in such a way that theeffect of these disturbances is relatively small. Amongst otherthings, this is also achieved by balancing the plug. The force
acting on the plug, which depends on the upstream or differential pressure, is eliminated by an equal opposing force.
The regulators can be designed to function as:–

Differential pressure regulators–

Flow regulators–

Differential pressure and flow regulators–

Differential pressure regulators with flow limitation–

Differential pressure, flow and temperature regulators–

Combined self-operated regulators for differential pressureor flow rate with additional electric actuator

Differential pressure regulators with closing actuator (seeFig. 1.1)
This actuator closes the valve when the adjusted differential
pressure set point is exceeded. The top of the diagram showsa closing actuator with an adjustable set point, the bottom an
actuator with a fixed set point determined by the installed set
point spring.
Differential pressure regulators with opening actuator (seeFig. 1.2)
This actuator opens the valve when the differential pressure
rises. The valve is closed when relieved of pressure (Δp = 0).
Flow control (see Fig. 1.3)
Principle of flow control according to the differential pressure
method. The differential pressure Δprestriction generated at the
restriction is transferred to the diaphragm surface of theactuator. The difference between the force at the diaphragmand the spring force of the set point spring causes the plug
position to change. For the flow rate, the differential pressure
Δprestriction acting on the restriction and the force Fm acting on
the diaphragm, the following applies:

4

Δprestriction =

Fm
A

V

= Flow rate

Fm

= Force at the actuator area

K, K´

= Constants

A= Actuator area

Δprestriction= Differential pressure created at the restriction formeasuring the flow rate

Flow regulators (see Fig. 1.4)
The set point is adjusted at the restriction. The regulators are
particularly suitable for district heating supply networks.
Differential pressure regulators with flow limitation (seeFig. 1.5)
These have a restriction for adjusting the set point for the
maximum flow rate. The set point is adjusted to a flow ratethat should not be exceeded.
The pressure downstream of the restriction (not the low pressure of the plant) and the high pressure of the plant act on thediaphragm. On sizing the plant, it is therefore important totake into consideration that the plant differential pressure is asum of the pressure drop across the restriction and the pressure drop across the fully opened plant:
Δpset point = Δpplant + ∆prestriction
Δpset point=

Differential pressure set point

Δpplant=

Pressure drop across the fully opened plant

Δprestriction=

Differential pressure created at the restriction formeasuring the flow rate

Differential pressure regulators with flow limitation are especially suitable for use in the primary circuit of an indirectly
connected district heating supply network.
Differential pressure and flow regulators (see Fig. 1.6)
These regulators are equipped with two diaphragms. The top
diaphragm is used to control the flow rate, the bottom diaphragm is used to control the differential pressure. The largest
signal is always used to control the regulator.
Depending on the intended application, these regulators areequipped with the necessary control lines.
The top of the diagram shows a closing actuator with an adjustable set point, the bottom an actuator with a fixed set
point.
Differential pressure or temperature regulators (see Fig. 1.7)
In differential pressure and temperature regulators, the largest
signal is used to move the plug.

T 3120 EN

Fig. 1.1: Differential pressure regulator
with closing actuator andadjustable set point (top) and
fixed set point (bottom)
p1

Fig. 1.2: Differential pressure regulator
with opening actuator andadjustable set point

p2

p1

1
2
3

–
Δp
+

–
Δp
+

6
4

4
5

5

Fig. 1.5: Differential pressure regulator
with flow limitation
11

p2
1
2
3
4
6
8

–
Δp
+

p1

–
Δp
+

Fig. 1.6: Differential pressure and flow
regulator with adjustable set
point (top) and fixed set point(bottom)
11

p2
1
2
3

p1

p2
1
2
3

.–
V

+

8

4

–
Δp
+

6
4

–
Δp
+

8

5

6

6

5

8

.–
V

+

Fig. 1.7: Differential pressure andtemperature regulator

13
12
14
4

8

8

Fig. 1.4: Flow regulator

–
Δp
+

1
2
3

6

–
Δp
+

p1

p2

6

5

p1

p1

10

8

6
4

11

.
V

1
2
3

–
Δp
+

8

Fig. 1.3: Flow control

p2

8
6

–
Δp
+

p2
1
2
3
8
17
16

1

Valve body6

Set point spring

13 Set point adjuster

2

Valve seat

8

Actuator

14 Operating bellows

3

Plug

10 External restriction

15 Control thermostat

4

Plug stem

11 Adjustable restriction

16 Temperature sensor

5

Set point adjuster

12 Spring

17 Capillary tube

Fig. 1: Schematic diagrams of regulators

T 3120 EN

5Principle of operation

Differential pressure control

1
1.1
2

Differential pressure and flow regulators
The self-operated differential pressure and flow regulators
consist of a valve and an actuator, which closes or opens thevalve when the differential pressure/flow rate increases.
The medium flows through the valve in the direction indicatedby the arrow. The areas released by the valve plug determine
the differential pressure/flow rate.
The Type 45-4 is used to illustrate how differential pressure
control works and Type 45-9 serves to demonstrate the principle of flow control.

3
4

12

Type 45-4 Differential Pressure Regulator
The regulator is used to limit the differential pressure to theadjusted set point.
It is designed for the installation in the low-pressure line (return flow pipe) of the plant.

6

11

7

The valve closes when the differential pressure rises.
The pressure upstream of the valve (low pressure) is transmitted to the top diaphragm chamber of the actuator through theinternal hole (12). The high pressure (flow pipe) is transferredto the bottom diaphragm chamber of the actuator over the external control line (11).

8

The differential pressure generates a positioning force at thediaphragm, which is used to position the plug (3) according
to the spring rate of the set point springs of the spring assembly (8) and the set point adjusted at the set point adjuster
(10).

9
10

Type 45-9 Flow Regulator
The flow rate is determined according to the differential pressure method.

Type 45-4
Differential pressure regulator with closing actuator

The areas released by the restriction (1.2) and valve plug (3)determine the flow rate. In this case, the high pressure upstream of the restriction is transferred through the control line(11) to the high-pressure side of the diaphragm, whereas thelow pressure downstream of the restriction is transferred to the
low-pressure side of the diaphragm.

Flow control

If the pressure difference acting on the operating diaphragm(7) exceeds the differential pressure set point of the set point
spring (5), i.e. the flow rate increases, the diaphragm moves
together with the plug stem (4) and the plug (3). The cross-sectional area of flow is reduced until the pressure drop created
above the restriction and the differential pressure created tomeasure flow are identical.

1.3
1
1.2
1.1
Turned into theplane ofprojection

2
3
4
5
7
6

11
Type 45-9
Flow regulator with orifice for flow control

Fig. 2: Design and principle of operation of the regulators

6

T 3120 EN

Pressure-temperature diagram(DIN)
For DIN materials, the diagrams
were created based on
DIN EN 12516-1. For materials inaccordance with US standards, thesewere created in compliance withASME B16.1 and ASME B16.34.

EN-GJS-400-18-LT,
CC499K

[bar]
PN

p
30

25

20

16

10

0

t
0

20

100

150

[°C]

The diagram below applies to the use of regulators for district heating (see DIN 4747-1)
Pressure-temperature diagram
according to DIN 4747-1 forselected materials
The materials for valves andconnecting pieces must be suitable
for sizing and the operating
conditions.
In this case, material is selectedaccording to DIN 4747-1.
Depending on the valve material,
various pressure ratings are also
permissible at different temperatures.

p

[bar]

25
PN 25
EN-GJS-400-18-LT
CuSn5Zn5Pb2-C (CC499K)

20
16
15

PN 16

13

EN-GJS-400-18-LT
CuSn5Zn5Pb2-C (CC499K)

10

5

0

ϑ
0

40

80

120

160

200

[°C]

Fig. 3: Pressure-temperature diagrams (DIN EN material number)

T 3120 EN

7

Series 45, 46, 47 and 48 Self-operated Regulators
Differential pressure and flow regulators

Type 45-6 · Installation in the short-circuit or bypass line

Self-operated differential pressure and flow regulators arecontrol devices whose measuring units draw their energy fromthe process medium which creates sufficient force to move thefinal control element (plug with plug stem). The released force
moves the plug when the set point differs from the actual value.

• Differential pressure regulator with opening actuator• No control line needs to be installed on mounting the regulator• Exchangeable operating diaphragmThe regulators are suitable for industrial, public and domestic
applications, especially for district heating supply systems.
They comply with AGFW (German District Heating Association) regulations.
• Low-maintenance proportional regulators requiring noauxiliary energy• Red brass body
• Suitable for water and other liquids or gases, provided
these do not cause corrosion.
• Single-seated valve with balanced plug
• Special version for mineral oils (other oils on request)• Connection with welding ends, threaded ends or withflanges

Technical data
Type 45-6
Valve size

Data Sheet u T 3226
CC499K
EN-GJS-400-18-LT

Pressure rating

PN 25

Set point range

0.1 to 4 bar (adjustable)
Liquids
Gases

Temperature
range

DN 15 to 50 (male thread)
DN 32 to 50 (flanged valve body)

Up to 150 °C
Up to 80 °C

Flow regulators
Type 45-9 · Installation in the flow or return flow pipe

Series 45• Flow regulator with closing actuator• No control line needs to be installed on mounting the regulator• Exchangeable operating diaphragm

Differential pressure regulators

Technical data

Type 45-1 · Type 45-2 · Installation in the flow pipe
Type 45-3 · Type 45-4 · Installation in the return flow pipe

Type 45-9• Differential pressure regulators with closing actuator• Only one control line needs to be installed on mounting
the regulator
Technical data
Types 45-1 · 45-2 · 45-3
45-4
Valve size

CC499K
EN-GJS-400-18-LT

Pressure rating
Set point
range
Temperature
range

Data Sheet u T 3124

Valve size

Data Sheet u T 3128
CC499K
EN-GJS-400-18-LT

DN 15 to 50 (male thread)
DN 32 to 50 (flanged valve body)Pressure rating

PN 16 and 25

Flow set point range with adifferential pressure across the
restriction of 0.2/0.3 bar

0.01 to 15 m³/h (adjustable)

Temperature
range

Liquids
Gases

Up to 150 °C
Up to 80 °C

DN 15 to 50 (male thread)
DN 32 to 50 (flanged valve body)
PN 16 and 25

Types 45-1 and 45-3
Types 45-2 and 45-4
Liquids
Gases

0.1 · 0.2 · 0.3 · 0.4 and 0.5 bar (fixed
set point)
0.1 to 4 bar (adjustable)
Up to 150 °C
Up to 80 °C

Types 45-3 Differential Pressure Regulator
with closing actuator

Type 45-6 Differential Pressure Regulator with
opening actuator

Type 45-9 Flow Regulator with closing
actuator

Fig. 4: Series 45 Regulators

8

T 3120 EN

Differential pressure regulator with flow limitation

Series 45-/46- … N
The regulators are especially suitable for local heat supply
networks and and large heating networks.
• Low-maintenance proportional regulators requiring noauxiliary energy• Red brass body
• G ¾ B connecting threads on both sides• Single-seated valve with soft-seated unbalanced plug
• Suitable for treated water and non-flammable gases
Differential pressure regulators
Type 45-1 N · Installation in the flow pipe
Type 45-3 N · Installation in the return flow pipe
• Differential pressure regulators with closing actuator• Fixed set point

Type 46-5 N · Installation in the return flow pipe
• Differential pressure regulator with flow limitation withclosing actuator
Technical data
Type 46-5 N

Data Sheet u T 3134

Valve size

DN 15

Pressure rating

PN 10

Flow rate set point range for waterwith a differential pressure at the
restriction of 0.2 barSpecial version

0.1 to 1.0 m³/h (adjustable)
0.12 to 0.5 m³/h (adjustable)

Differential pressure set point, optionally0.2, 0.3 or 0.5 bar

Temperature
range

Treated waterNon-flammable gases

Up to 110 °C
Up to 80 °C

Technical data
Types 45-1 N · 45-3 N

Data Sheet u T 3140

Valve size

DN 15

Pressure rating

PN 10

Set point range

0.15 or 0.3 bar (fixed set
point)

Temperature
range

Treated waterNon-flammable gases

Up to 110 °C
Up to 80 °C

Type 45-1 N Differential Pressure Regulator

Type 45-3 N Differential Pressure Regulator

Type 46-5 N Differential Pressure Regulator
with Flow Limitation

Fig. 5: Type 45-1 N · Type 45-3 N · Type 46-5 N

T 3120 EN

9Differential pressure regulators with flow limitation

Series 46 and 47
Flow and differential pressure or pressure regulators
Type 46-7 · Installation in the return flow pipe
Type 47-1 · Installation in the flow pipe
• Closing actuator with two diaphragms for flow rate anddifferential pressure control• Adjustable differential pressure set point
Type 47-5 · Installation in return flow pipe
Type 47-4 · Installation in the flow pipe
• Closing actuator with two diaphragms for flow rate anddifferential pressure or pressure control• Fixed differential pressure set point
Technical data
Types 46-7 · 47-1 · 47-4 · 47-5
Valve size

CC499K
EN-GJS-400-18-LT

Pressure rating
Differential
pressure set
point range

DN 15 to 50 (male thread)
DN 32 to 50 (flanged valve body)• Differential pressure regulators with flow limitation withclosing actuator• Restriction for adjusting the flow rate limitation
Technical data
Types 46-5 · 46-6
Valve size

CC499K
EN-GJS-400-18-LT

Pressure rating
Differential
pressure set
point range

DN 15 to 50 (male thread)
DN 32 to 50 (flanged valve body)
PN 16 and 25

Type 46-5
Type 46-6

Flow set point range with a differential
pressure at the restriction of
0.1/0.2 bar
Temperature
range

Data Sheet u T 3130

Liquids
Non-flammable gases

0.2 · 0.3 · 0.4 and 0.5 bar (fixed
set point)
0.2 to 2 bar (adjustable)
0.01 to 15 m³/h
Up to 150 °C
Up to 80 °C

PN 16 and 25
Types 47-4 and 47-5
Types 46-7 and 47-1

Flow set point range with a differential
pressure at the restriction of 0.2 bar
Temperature
range

Data Sheet u T 3131

Type 46-5 and Type 46-6 · Installation in the return flow pipe

Liquids
Non-flammable gases

0.2 · 0.3 · 0.4 and 0.5 bar (fixed
set point)
0.1 to 2 bar (adjustable)
0.01 to 15 m³/h
Up to 150 °C
Up to 80 °C

Type 46-5 Differential Pressure
Regulator with Flow Limitation

Type 46-6 Differential Pressure
Regulator with Flow Limitation

Type 46-7 Flow and Differential
Pressure or Pressure Regulator

Type 47-1 Flow and Differential
Pressure Regulator with manualadjuster (DN 15 to 32)

Fig. 6: Series 46 and 47 Regulators

10

T 3120 EN

Differential pressure, flow and temperature regulators
The regulators consist of:
–

Valve

–

Actuator–

Control thermostat with set point adjuster, capillary
tube and temperature sensor

In versions with double adapter and locking, the valve islocked when the temperature rises above the limit adjusted at
the second control thermostat.
In versions with safety temperature monitors (STM) and safety
temperature limiters (STL), a safety thermostat closes the valve
in the event of malfunction or when the temperature exceeds
the limit. The valve of safety temperature limiters is additionally locked.
Flow and temperature regulator
Type 2469/2430 · Installation in the flow or return flow pipe
• Flow and temperature regulator with Type 2430 Control
Thermostat for temperature set point adjustment• Continuously adjustable flow set point using an integrated
restriction
Differential pressure and temperature regulator with flow
limitation
Type 2479/2430 · Installation in the return flow pipe
• Differential pressure regulator with flow limitation andtemperature regulator with Type 2430 Control Thermostat
for temperature set point adjustment• Fixed differential pressure set point• Continuously adjustable flow limitation

Flow and temperature regulator and safety temperature
limiter
Type 2469/2430/2439 · Installation in the flow or
return flow pipe
• Flow and temperature regulator with Type 2430 Control
Thermostat for temperature set point adjustment• Fixed differential pressure set point• Continuously adjustable flow limitation• Type 2439 Safety Thermostat closes and locks the valve
when the pressure reaches the adjusted limit
Flow and temperature regulator and safety temperaturemonitorType 2469/2430/2403 · Installation in the flow or
return flow pipe
• Flow and temperature regulator with Type 2430 Control
Thermostat for temperature set point adjustment• Fixed differential pressure set point• Continuously adjustable flow limitation• Type 2403 Safety Thermostat closes the valve when thepressure reaches the adjusted limit
Technical data
Types 2469/2430 · 2469/2430/2439 ·Types 2469/2430/2403 · 2479/2430
Valve size

CC499K
EN-GJS-400-18-LT

Pressure rating

Data Sheet u T 3132

DN 15 to 50 (male thread)
DN 32 to 50 (flanged valve
body)
PN 25

Differential
pressure set
point range

Type 2479/…

0.2 bar (fixed set point)

Flow rate set
point range

Type 2469/... withdifferential pressure
across the restriction of
0.2 barType 2479/... withdifferential pressure
across the restriction of
0.1/0.2 bar

0.01 to 15 m³/h

Temperature
range

Liquids
Non-flammable gases

Up to 150 °C
Up to 80 °C

Fig. 7: Type 2469/2430 Flow and Temperature Regulator

T 3120 EN

11

Series 48
Pressure-independent control valve/combined self-operated
regulator for flow rate with an additional electric actuator. The
control accuracy is independent from the differential pressure
across the valve. Combined self-operated regulator for flowrate and temperature with additional electric actuator.
The regulators consist of:–

A valve, diaphragm actuator and an electric actuator

Type 5825 and TROVIS 5725 Electric Actuators with fail-safe
action as well as Type 5824, Type 5857 and TROVIS 5724,
5757 Electric Actuators without fail-safe action can be used.
Type 2489/… is additionally fitted with a Type 2430 Control
Thermostat with set point adjuster, capillary tube and temperature sensor.
The largest signal is always used to control the regulator.
Pressure-independent control valve with electric actuator
Type 2488 N/5857 or 5757 · Installation in the flow or
return flow pipe
• Flow rate set point adjustable• Type 5857 or TROVIS 5757 Electric Actuator• Type 45-9 as basic regulator
Technical data
Type 2488 N/5857

Data Sheet u T 3136

Valve size

DN 15

Pressure rating

PN 10

Flow rate set point range
Differential pressure at restriction: 0.2 bar

0.3 to 1.0 m³/h (adjustable)

Temperature
range

Treated waterNon-flammable gases

Up to 110 °C
Up to 80 °C

Pressure-independent control valve with electric
actuator
Type 2488/… · Installation in the flow or return flow pipe
• Flow rate set point adjustable• Type 5824, 5825, 5857 or TROVIS 5725, 5724, 5757
Electric Actuator• Type 45-9 as basic regulator
Pressure-independent control valve with electric
actuator and control thermostat
Type 2489/…/2430 · Installation in the flow or return flowpipe
• Flow rate set point adjustable• Temperature control with Type 2430 Control Thermostat• Type 5824, 5825, 5857 or TROVIS 5725, 5724, 5757
Electric Actuator• Type 2469/2430 as basic regulator
Control equipment tested according to DIN EN 14597 isavailable.
Technical data
Type 2488/… · 2489/…/2430
Valve size

CC499K
EN-GJS-400-18-LT

DN 15 to 50 (male thread)
DN 32 to 50 (flanged valve
body)

Pressure rating

PN 16 and 25

Flow set point range with a differential
pressure at the restriction of 0.2 bar

0.03 to 15 m³/h (adjustable)

Temperature set point ranges
Temperature
range

TROVIS 5724 ·
5725 · 5757 ·Type 5824 ·
5825 · 5857

0 to 150 °C

Treated waterNon-flammable gases

Supply voltage

Fail-safe action

Up to 150 °C
Up to 80 °C

Data Sheet u T 5724 · Data Sheet u T 5724-8
Data Sheet u T 5725-7
Data Sheet u T 5757 · Data Sheet u T 5757-7
Data Sheet u T 5824 · Data Sheet u T 5825
Data Sheet u T 5857

Permissible ambient temperature

Type 2488 N/5857 Pressure-independent Control Valve with electric
actuator

Data Sheet u T 3135

0 to 50 °C

TROVIS 57xx

230 V, 50 Hz

Type 58xx

230 V, 50 Hz; 24 V, 50/60 Hz;
24 V DC

WithoutWith

TROVIS 5724 · 5757 · Type 5824 · 5857
TROVIS 5725 · Type 5825

Type 2488/5824 Pressure-independent Control Valve with electric
actuator

Fig. 8: Series 48 Combined Self-operated Regulators with additional electric actuator

12

T 3120 EN

9

1
9

+

3

–
+
+

–

2
–

Differential pressure control in the flow or return flow pipe of acooling system

Differential pressure control in the bypass pipe of a heating or
cooling system (not district heating)
9

9

3

4

–

+
–
+

Differential pressure control in the bypass pipe of a rotary
pump

Differential pressure and temperature control
9

9

5
F
–
+

6

. –
V +

–
+

Combined flow rate and differential pressure control in the
return flow pipe of a heating or cooling system

Flow control with external orifice
9

Δp

9

7

7

. –
V +

. –
V +

–
Δp +

p2

Combined flow rate and differential pressure control in theflow pipe of a heating or cooling system

Combined flow rate and pressure control

1

Type 45-1 · Type 45-2

4Type 2469/2430

7Type 47-1 · Type 47-4

2Type 45-3 · Type 45-4

5Type 45-1 · Type 45-2

9

SAMSON strainer

3Type 45-6

6Type 46-7 · Type 47-5

Fig. 9: Sample applications

T 3120 EN

13

T 3120 EN

2021-07-16 · English

Specifications subject to change without notice