Samson 3222-5757, 3222-5725, 3222-5724 User Manual

Electric Control Valves/ Controller with Electric Actuator

Type 3222/5724, Type 3222/5725 and Type 3222/5757

Type 3222/5725 Globe Valve mounted on Controller with Electric Actuator

Type 3222/5757 Globe Valve mounted on Controller with Electric Actuator

Mounting and Operating Instructions

EB 5766 EN

Edition July 2008

Contents

Contents Page

1 Design and principle of operation . . . . . . . . . . . . . . . . . . . 4

1.1 Versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.2 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.1 Mounting position . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.2 Strainer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.3 Additional installation instructions . . . . . . . . . . . . . . . . . . . . 9

3 Attaching the actuator to the valve . . . . . . . . . . . . . . . . . . 10

3.1 Type 5757/-7 Controller with Electric Actuator . . . . . . . . . . . . . 10

3.2 Type 5724/5725 Controller with Electric Actuator . . . . . . . . . . . 10

4 Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.1 Type 5757-7 Controller with Electric Actuator. . . . . . . . . . . . . . 11

4.2 Type 5757 Controller with Electric Actuator. . . . . . . . . . . . . . . 11

4.3 Type 5724/5725 Controller with Electric Actuator . . . . . . . . . . . 12

5 Manual override . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.1 Type 5757/-7 Controller with Electric Actuator . . . . . . . . . . . . . 13

5.2 Type 5724/5725 Controller with Electric Actuator . . . . . . . . . . . 13

6 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

7 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

8 Dimensions in mm and weights . . . . . . . . . . . . . . . . . . . . 16

9 Appendix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

9.1 Wiring for Type 5757-7 . . . . . . . . . . . . . . . . . . . . . . . . 18

9.2 Wiring for Type 5757 . . . . . . . . . . . . . . . . . . . . . . . . . 20

9.3 Wiring for Type 5724/5725 . . . . . . . . . . . . . . . . . . . . . 22

2 EB 5766 EN

Typetest

The Type 5725 Controller with Electric Actuators with safety function used in conjunction with Type 3222 Valves are typetested according to DIN 32730 by the German technical inspectorate TÜV.

General safety instructions

The control valves may only be mounted, started up or serviced by fully

trained and qualified personnel, observing the accepted industry codes and practices. Make sure employees or third persons are not exposed to any danger. All safety instructions and warnings in these mounting and operating instructions, particularly those concerning assembly, start-up and maintenance, must be observed.

The control valves fulfill the requirements of the European Pressure Equip

ment Directive 97/23/EC. Valves with a CE marking have a declaration of conformity which includes information about the applied conformity assess ment procedure. The declaration of conformity is available on request.

For appropriate operation, make sure that the control valve is only used in

applications where the operating pressure and temperature do not exceed the operating values which are based on the valve sizing data submitted in the order. The manufacturer does not assume any responsibility for damage caused by external forces or any other external influence! Any hazards which could be caused in the control valve by the process medium, the operating pressure, the signal pressure or by moving parts are to be prevented by means of the appropriate measures.

Proper shipping and appropriate storage of the control valve are assumed.

Caution!

For installation and maintenance, make sure the relevant section of the

pipeline is depressurized and, depending on the process medium, drained as well. If necessary, allow the control valve to cool down or warm up to reach ambient temperature prior to starting any work on the valve.

The electric actuators have been designed for use in electrical power

installations. For wiring and maintenance, you are required to observe the relevant safety regulations.

Only use power interruption devices which are protected against

unintentional reconnection of the power supply. Take special care when making adjustments on live parts. Do not remove

any covers!

EB 5766 EN 3

Design and principle of operation

1 Design and principle of

operation

The control valves consist of a single-seated Type 3222 Globe Valve and either a Type 5757, Type 5757-7 or Type 5724 Controller with Electric Actuator or a Type 5725 Controller with Electric Actuator with safety function.

The process medium flows through the globe valve in the direction indicated by the arrow on the body. The position of the valve plug determines the flow rate over the cross-sec tional area of flow released between the plug (3) and valve seat (2). The plug stem (4) with plug is connected with the stem of the actuator (10) by a force-locking connection. The valve is opened by the valve spring (5) following the retracting movement of the actuator stem. A special version is required for water above 150 °C and for steam (Fig. 1). The plug is moved by a change in the control signal acting on the actuator.

The electric actuator with safety function (Type 5725) has a spring mechanism and an electromagnet that can be connected to a safety control circuit. When the control cir cuit is interrupted or the power supply fails, the magnet disengages the gear from the self-locking motor and releases the spring mechanism. The valve is closed in the event of a safety situation (fail-safe action “actuator stem extends”).

The electric actuators contain a digital con troller integrated into the actuator. The con trolled variable is recorded over the directly connected Pt 1000 sensor (see Table 2).

The output signal of the digital controller acts as a three-point stepping signal on the

synchronous motor of the actuator and is transferred over the connected gear as a positioning force onto the actuator stem.

The Type 5757, Type 5724 and Type 5725 are particularly suitable for DHW heating in instantaneous heating systems and for fixed set point control circuits in mechanical engi neering applications.

Type 5757-7 is suitable for heating applica tions.

1.1 Versions

PN DN EB

Electric control valve/Controller with electric actuator

Type 3222/5757 Type 3222/5757-7 Type 3222/5724 … with safety function Type 3222/5725

Refer to the listed Mounting and Operating Instructions (EB) for details on the controllers with electric actuators

Controller with electric actuator for domestic hot water heating in instantaneous heating systems and for fixed set point control circuits in mechanical engineering applications

Controller with electric actuator for heating applications

25 15 to 25 5757

25 15 to 25 5757-7

25 15 to 50 5724

4 EB 5766 EN

1 Valve body 2 Seat 3 Plug 4 Plug stem 5 Valve spring 6 Guide nipple 7 Balancing bellows 8 Balancing piston

10 Controller with electric

actuator

Design and principle of operation

Type 3222/5757

Fig. 1 · Type 3222/5757 and Type 3222/5724 Electric Control Valves/Controller with Electric Actuator

Special version for temperatures up to 200 °C and

Type 3222/5724

with plug balanced by a bellows

EB 5766 EN 5

Design and principle of operation

1.2 Technical data

1. Single-seated Type 3222 Globe Valve

Nominal size DN 15 20 25 32 40 50

Version with threaded ends

Thread size G ½¾1 –––

Version with female thread • • • – – – Nominal pressure PN 25 Seat/plug sealing Metal sealing for K Rated travel mm 6 12 Rangeability 50 : 1 Leakage class acc. to DIN EN 1349 Class I (< 0.05 % of K

Version for water, oil and other liquids

Max. permissible temperature 150 °C Max. permissible differential pressureΔp in bar

Types 5724 and 5725 20 12

Type 5757 20 –

Version for water and steam

Max. permissible temperature 200 °C Max. permissible differential pressureΔp in bar

Types 5724 and 5725 20 · 10 for 3.6≤K

Type 5757 20

Materials

Valve body Red brass CC491K · EN-JS1049 (flanged body) Seat Stainless steel 1.4104 Plug 1.4104/CW509L with soft sealing · 1.4104 for 0.1≤K Valve spring Stainless steel 1.4310 K Packing EPDM/FPM (FKM) · Oil-resistant version: FPM Welding ends St 37 Threaded ends Red brass CC491K Screwed-on flanges St 37.2

with flanges

as flanged body

••••••

2.5 · Soft sealing for K

≤

coefficient)

1, 2)

≤

· 5

5–

3.6

≥

2.5

≤

6 EB 5766 EN

Design and principle of operation

Nominal size DN 15 20 25 32 40 50 Thread size G ½¾1–––

coefficients

Version with female thread 3.6 5.7 7.2 – – – Version with male thread 4 6.3 8 16 20 25

Reduced K

coefficients

0.1· 0.16 · 0.25 · 0.4

0.63 · 1.0 · 1.6 · 2.5

Rated travel mm 6 12

Use an intermediate insulating piece for temperatures above 130 °C to protect the actuator

DN 15 to 25 with Type 5757 Actuator: Use an intermediate insulating piece for temperatures above 110 °C to protect the actuator

Differential pressure for KVS= 1 and 1.6

Differential pressure for KVS= 2.5 and 4

Version with male thread

Version with female thread

1.0 · 1.6 · 2.5

· 3.6

–––

EB 5766 EN 7

Design and principle of operation

2. Controllers with electric actuators

Type

Nominal size DN 15 to 25 15 to 25 15 to 25 32 to 50 15 to 25 32 to 50

Scope of application Heating

Safety function Without Without With Rated travel mm 6 6 6 12 12 6 6 12 12 Transit time for rated travel s 20 35 18 70 35 35 18 70 35 Transit time upon fail-safe

action

s – – 4466

Fail-safe action – – Stem extends Nominal thrust kN 0.3 0.7 0.5 Manual override Yes Yes Possible

Power supply 230 V (±10 %), 50 Hz Power consumption approx. VA 3 3 37375959 Permissible temperatures

Ambient °C 0 to 50 0 to 50 0 to 50 Storage °C –20 to 70 –20 to 70 –20 to 70 At connecting rod °C 0 to 110 0 to130 0 to 130

Degree of protection IP 42 IP 54 (upright position, acc. to DIN IEC 529)

Inputs and outputs of the digital controller

Temperature sensor Pt 1000 3 x 1 x 1 x 1 x

Setting range °C 1 to 150 0 to 150 1 to 150 1 to 150

Potentiometer input

1100/2000 Water flowmeter input – 530 pulses/l 530 pulses/l 530 pulses/l Current input – 4 (0) to20 mA 4 (0) to 20 mA 4 (0) to 20 mA

Binary input BE1

Binary input BE2

Op. mode switchover

230 V/50 Hz

Binary output BA

Cir. pump/Ex ternal demand

Manual override using a 4 mm hex screwdriver (after removing the housing cover); always returns to fail-safe position after safety release.

Recommendation for Type 5724, Type 5725 and Type 5757: With gold contacts

5757 5724 5725

5757-7 5757 -10 -13 -20 -23 -10 -13 -20 -23

DHW heating in instantaneous heating systems,

fixed set point control circuits in mechanical engineering

1000 to

–– –

Switching between internal set points/

Deactivation of function to maintain temperature constant

– Flow switch

–– –

8 EB 5766 EN

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