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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
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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 . . . . . . . . . . . . . . .
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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 whi
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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
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Design and principle of operation 1 Design and principle of 1.1 Additional equipment operation The actuators can be equipped with addi- tional units, such as limit switches and po- The Type 3374 Electric Actuator is used in tentiometers, to influence the tasks of control industrial plants as well as in heating, venti- equipment. In addition, the actuator can be lation and air-conditioning systems. equipped with a digital positioner for pro- The linear actuator is suitable for form-fit at- cessin
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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 240 120 240/120 120 rated travel s Actuating time in case of –12 fail-safe action s 2.5 kN 2kN 0.5 kN Nominal thrust Stem extends or retracts Stem extends Stem retracts 207 V to 253 V; 50 Hz, 90 V to 127 V; 60 Hz Power
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Design and principle of operation 1) Digital positioner Operating mode 1 Operating mode 2 Operating mode 3 4...20 mA, Ri = 0.05 kΩ 0...20 mA, Ri = 0.05 kΩ 3) Range As per settings 2) Input variable 2...10 V, Ri = 10 kΩ 0...10 V, Ri = 10 kΩ Resolution 10 Bit 4...20 mA, R 0.2 ≤ kΩ 0...20 mA, R ≤ 0.2 kΩ B B 3) Range As per settings Position feedback 2...10 V, R ≥ 5 kΩ 0...10 V, R ≥ 5 kΩ B B 4) 5) signal Resolution 8 Bit Increasing, actuator stem retracts or extends 3) Characteristic As per settings
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Installation the top of the coupling nut (8) is 2 Installation reached. Secure position with lock nut (9). 2.1 Mounting position 3. Place actuator onto valve bonnet (2.3) Installation depends on the mounting posi- and fasten with ring nut (7). tion of the valve. However, do not install the If necessary, retract actuator stem actuator suspended downwards. slightly beforehand using the manual override. Note! 4. When the coupling nut (8) fits closely Manual override is only possible in actua- onto
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Installation Attachment to Series V 2001, Attachment to Series 240 Type 3260 DN 65 to 150 and Type 3214 DN 65 to 100 1 1 2.3 7 2.1 x 3 3 4 4 8 5 10 9 6 5 1 1 Actuator 2.2 2.1 Actuator yoke 2.2 Valve yoke 7 2.3 Bonnet 3 Actuator stem Attachment to Type 3214 3 4 Stem connector DN 125 to 250 10 5 Plug stem 6 Nut 4 7 Ring nut 5 8 Coupling nut 9 Lock nut 10 Travel indicator scale Fig. 2 · Attachment to the valve EB 8331-1 EN 9
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Electrical connections 3 Electrical connections Establish electrical connections as indicated on the circuit diagram on the actuator cover Upon installation of the electric ca- and as illustrated in Figs. 3 and 4. bles, you are required to observe the A maximum of 3 cable glands can be at- regulations concerning electrical tached to the housing for cable entries. power installations according to DIN VDE 0100 as well as the regulations of your local power supplier. L Retracts eL Ce Ce aL Extends
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Electrical connections Caution! Only connect to the main power network Particularly for 24 V, 50 Hz actuators, when the power is switched off. use wires with a sufficiently large Only use power interruption devices cross-section to guarantee that the per- which ensure that the power cannot be missible voltage tolerances are not ex- switched on again unintentionally. ceeded. Limit switches (optional) 41 44 42 51 54 52 Load, max. 25 mA V mA _ ++ V mA V V _ _ _ + NL ++ + 31 32 33 13 12 11 81
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Operation and setting 4 Operation and setting 4.2.1 Limit switches 1. Use motor or manual override to move 4.1 Manual operation of the the control valve to the position where actuator the switching function is to be activated. To operate the manual override, place 2. Use hex wrench to turn spindle (2) for 4 mm hex wrench on the red actuator shaft the upper limit switch or spindle (3) for located at the side of the housing. The hex the lower limit switch until the associated wrench is delivered w
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Operation and setting Limit switch Stem retracts Metal tag Stem extends Rated travel inscription 12 12.1 13 13.1 aa e 1 Microswitch 2 Spindle upwards 3 Spindle downwards 5 Intermediate gear 7 Cam bracket 12 Gear potentiometer 1 12.1 Potentiometer shaft 13 Gear potentiometer 2 13.1 Potentiometer shaft 12 3 7 5 Fig. 5 · Performing settings EB 8331-1 EN 13 B Nennhub 15
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Operation and setting 1. Set selector switch (2) with the arrow 4.3 Setting the digital positioner pointing to operating mode 0 = In the actuator version with digital (control switched off). positioner, the travel is calibrated automati- 2. Check mounting position of the potenti- cally, allowing the travel (controlled variable ometer gear (12). x) and the input signal (reference variable The gear must be put onto the potentiometer w) of the positioner to be matched in the shaft to correspond wit
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Operation and setting Press the button briefly to obtain a travel Caution! calibration for valve CLOSED when the actu- The automatic travel calibration lasts ator stem extends. approximately twice as long as the Direction of action: Increasing/increasing. actuator's transit time. During this Hold the button pressed for longer than 3 period, the valve leaves its current seconds (indicated by switchover from sig- position. Calibrate the travel either nal lamp 8 to signal lamp 9) to obtain a on the
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Operation and setting as it will go to the valve's CLOSED position. Do not adjust the potentiometer before the Calibration is carried out when both signal closed position is actually reached. This is lamps (8 and 9) are lit. indicated by the associated, activated limit switch on the board (Fig. 5 on page 13). Travel calibration starts after the mounting To proceed, adjust the shaft of the potenti- position of the potentiometer gear (12) has ometer (12.1) by turning it gradually clock- been deter
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Retrofitting additional electrical equipment Setting with limited travel range 5 Retrofitting additional electrical equipment Travel calibration is usually based on the maximum travel of the control valve. The actuator can be subsequently equipped If, however, the maximum possible travel is with two limit switches, two potentiometers to be limited to a smaller travel end value, or a digital positioner. press the button (4) once at the start of cali- Depending on the actuator version used, the br
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Retrofitting additional electrical equipment 6. Turn both contact cams (6) as illustrated 5.1 Limit switches in Fig. 7.1 corresponding with the posi- The retrofit kit (order no. 1400-8830) is re- tion of the actuator stem on the cam quired to install limit switches. If the actuator bracket (7). is not already equipped with potentiometers 7. Push the spacer (9) onto the spindle for or a positioner, the basic unit (order no. the cam bracket. Push the cam bracket 1400-8829) is also required. The un
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B B Retrofitting additional electrical equipment 1 Actuator board 9 Spacer 2 Spindle gear 10 Serrated ring 3 Sleeve 11 Terminal board with microswitches 4 Spindle 12 Gear in version 5 Intermediate gear with potentiometer 6 Contact cam 7 Cam bracket 8 Adjustment gear 7.1 Position of the contact cams (6) on the cam bracket (7) 7 8 954 32112 6 6 For actuator stem retracts extends 7.2 Position of the cam bracket (7) 5 12 71110 8 For actuator stem retracts 7 For actuator stem extends 52 Fig. 7 ·
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Retrofitting additional electrical equipment sure the lateral latch is properly en- 5.2 Potentiometers gaged in the groove of the sleeve. Actuators with a digital positioner cannot be 3. Plug intermediate gear (5) onto the spin- equipped with potentiometers. dle (4). Place the serrated ring (10) on To install the potentiometers, an actuator top and push it down until it will not go board with the appropriate potentiometers any further. and gears (12 and 13) is required. 4. The potentiometer gear
