Samson EB 8331-1 User Manual [EN]

Electric Actuator Type 3374

Fig. 1 · Type 3374 Actuator mounted on a Type 3535 Three-way Valve

Mounting and Operating Instructions

EB 8331-1 EN

Edition October 2007

Contents

Contents Page

1 Design and principle of operation . . . . . . . . . . . . . . . . . . . 5

1.1 Additional equipment. . . . . . . . . . . . . . . . . . . . . . . . . . 5

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

2 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.1 Mounting position . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.2 Attachment to the valve . . . . . . . . . . . . . . . . . . . . . . . . . 8

3 Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . 10

4 Operation and setting . . . . . . . . . . . . . . . . . . . . . . . . 12

4.1 Manual operation of the actuator . . . . . . . . . . . . . . . . . . . 12

4.2 Setting the additional equipment . . . . . . . . . . . . . . . . . . . . 12

4.2.1 Limit switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.2.2 Potentiometers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.3 Setting the digital positioner . . . . . . . . . . . . . . . . . . . . . . 14

5 Retrofitting additional electrical equipment . . . . . . . . . . . . . . 17

5.1 Limit switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.2 Potentiometers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5.3 Digital positioner . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.3.1 Calibrating the positioner . . . . . . . . . . . . . . . . . . . . . . . 22

5.3.2 Simplest method to calibrate the actuator. . . . . . . . . . . . . . . . 22

6 Dimensions in mm . . . . . . . . . . . . . . . . . . . . . . . . . . 23

2 EB 8331-1 EN

Safety instructions

General safety instructions

Assembly, start-up and operation of this device may only be performed by

trained and experienced personnel familiar with the product. 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 hazards due to their specialized training, their knowledge and experience as well as their knowledge of the applicable standards. Any hazards which could be caused in the connected valve by the process

medium, operating pressure or moving parts are to be prevented by means of the appropriate measures. The actuators has been designed for use in electrical power installations.

For wiring and maintenance, you are required to observe the relevant safety regulations. The actuator must be protected against unintentional reconnection of the power supply. Take special care when making adjustments on live parts. Do not remove any covers! Proper transportation and storage are assumed.

EB 8331-1 EN 3

Note:

Actuators with a CE marking fulfill the requirements of the Directives 94/9/EC and 89/336/EEC. The Declaration of Conformity is available on request.

4 EB 8331-1 EN

Design and principle of operation

1 Design and principle of

operation

The Type 3374 Electric Actuator is used in industrial plants as well as in heating, venti lation and air-conditioning systems. The linear actuator is suitable for form-fit at tachment to various SAMSON valve series, depending on the version with or without fail-safe action. The actuators consist of a reversible synchronous motor and a mainte nance-free planetary gear with ball screw. The synchronous motor is switched off by torque-dependent switches when the final positions are reached or in case of an over load.

The motion is transmitted to the actuator stem by the gears and ball screw.

Actuator versions with integrated yoke are primarily used for attachment to Series V 2001 Valves, Type 3260 (DN 65 to 150), and Type 3214 (DN 65 to 250) Valves. Actuator versions for central attachment using an M30 x 1.5 ring nut are preferably combined with Series 240 Valves and Type 3214 (DN 125 to 150) .

1.1 Additional equipment

The actuators can be equipped with addi tional units, such as limit switches and po tentiometers, to influence the tasks of control

equipment. In addition, the actuator can be

equipped with a digital positioner for pro

cessing standard signals in the range of

0 (2) to 10 V or 4 (0) to 20 mA. Refer to section 5 for details on retrofitting

additional equipment.

EB 8331-1 EN 5

Design and principle of operation

1.2 Technical data

Actuator Type 3374 -10 -11 -15 -21 -26 -31 -36

Version with Yoke Ring nut Yoke Ring nut Yoke Ring nut Safety function Without Stem extends Stem retracts Rated travel mm 30 15 30/15 15 Actuating time for

rated travel s Actuating time in case of

fail-safe action s

Nominal thrust

Power supply

Power consumption VA

Without positioner

With positioner Motor switch-off Torque-dependent Rated temperature range 5 to 60 °C Storage temperature range –20 to +70 °C Degree of protection IP 54 according to IEC 529, (IP 65 with cable glands

Overvoltage category II Design and inspection EN 61010 Edition 3.94 Class of protection II Noise immunity EN 50082 Part 2 Noise emission EN 50082 Part 1 Manual override Using hex wrench · Adjustment impossible after fail-safe action has been triggered

Weight, approx. kg 3.2 3.3 3.9 4.0 3.5 3.6 Materials Housing and cover made of plastic (PPO glass fiber reinforced)

Additional electrical equipment

Limit switch Two travel-dependent, adjustable limit switches, perm. load 250 V AC; 3A Potentiometer

Cable glands M20 x 1.5 with metal nut, width across flats 23/24 mm

Not for version with positioner

240 120 240/120 120

–12

2.5 kN

Stem extends or retracts

207 V to 253 V; 50 Hz, 90 V to 127 V; 60 Hz

or 21.6 V to 27.6 V; 50 Hz (other voltages on request)

7.5/13

9.5/15

Suspended mounting position not approved

Manual adjustment of actuators with fail-safe action only possible when supply

voltage is applied (see also section 4.1)

0 to 1000Ω, (0 to 900Ωat rated travel) max. permissible current 1 mA

2kN

Stem extends

10.5/16

12.5/18

0.5 kN

Stem retracts

)

6 EB 8331-1 EN

Design and principle of operation

Digital positioner

Operating mode 1 Operating mode 2 Operating mode 3

Input variable

Range

4...20 mA, Ri = 0.05 k

2...10 V, Ri = 10 k

0...20 mA, Ri = 0.05 k

0...10 V, Ri = 10 k

As per settings

Resolution 10 Bit

Position feedback

4) 5)

signal

Characteristic

Range

4...20 mA, R

2...10 V, R

0.2≤k 5 k

≥

0...20 mA, R

0...10 V, R

Resolution 8 Bit

Increasing, actuator stem retracts or extends

as the input variable increases

0.2 k

≤

5 k

≥

As per settings

Travel Adjustable 6 to 20 mm at 15 mm rated travel

6 to 35 mm at 30 mm rated travel

(the travel range between 12 and 35 mm has been extended to between 6

and 35 mm for 30 mm rated travel in positioner version V1.10 and higher)

Setting

Using travel calibration button

(1 mm each time the button is pressed)

As per settings

using button

1 binary input Electrically isolated, switching voltage 18 to 30 V DC, approx. 7 mA

1 binary output Electrically isolated semiconductor contact, max. 45 V DC,

min. 3 V DC, max. 25 mA

Integrated interface for SAMSON memory pen /PC

Data transmission including settings, operating status and alarms

Transfer protocol: SAMSON SSP protocol

Retrofittable bus interface On request

Total delay time Approx. 30 ms

Accuracy

Maximum two current inputs may be switched in series

Maximum values ±50 mA or ±25 V

SAMSON TROVIS-VIEW Operator Interface software, SAMSON memory pen

Can only be taken from current or voltage signal

Not when retrofittable interface is used

2.5 % without taking the dead band into account

≤

EB 8331-1 EN 7

Installation

2 Installation

2.1 Mounting position

Installation depends on the mounting posi tion of the valve. However, do not install the actuator suspended downwards.

Note!

Manual override is only possible in actua tors with fail-safe action when the power supply is connected (see section 4.1).

2.2 Attachment to the valve

Series V 2001 (DN 15 to 80), Type 3260 Valves (DN 65 to 150) and Type 3214 Valves (DN 65 to 100)

1. Remove protective covers and unscrew nut (6) from the control valve.

2. Place actuator with yoke onto the valve and fasten with the nut (6, SW 36) using a minimum tightening torque of 150 Nm. If necessary, retract actuator stem slightly beforehand using the man ual override.

3. When the plug stem (5) fits closely onto the actuator stem (3), attach both stem connector clamps (4) and fasten with screws.

Series 240

the top of the coupling nut (8) is reached. Secure position with lock nut (9).

3. Place actuator onto valve bonnet (2.3) and fasten with ring nut (7). If necessary, retract actuator stem slightly beforehand using the manual override.

4. When the coupling nut (8) fits closely onto the actuator stem, attach both stem connector clamps (4) and screw tight.

5. Move actuator stem (3) to the end posi tion (valve closed) using the manual override or motor.

6. Align travel indicator scale (10) to the middle of the stem connector (4) and screw tight.

Type 3214 (DN 125 to 250)

1. Place actuator onto the valve and secure with the ring nut (7). If necessary, retract actuator stem slightly beforehand using the manual override.

2. When the plug stem fits closely onto the

actuator stem (3), attach both stem connector clamps (4) and screw tight.

3. Move actuator stem (3) to the end posi tion (valve closed) using the manual override or motor.

4. Align travel indicator scale (10) to the middle of the stem connector (4) and screw tight.

1. Push plug stem down to close the valve.

2. Turn coupling nut (8) until a distance of x = 75 mm (x = 90 mm for DN 100 and larger) between the top of the yoke and

8 EB 8331-1 EN

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