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Samson EB 8331-1 EN Automobile Parts User Manual

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1. Lock nut 10 Travel indicator scale Fig 2 Attachment to the valve EB 8331 1 EN 9 Electrical connections 3 Electrical connections Establish electrical connections as indicated AN Upon installation of the electric ca on the circuit diagram on the actuator cover bles you are required to observe the and as illustrated in Figs 3 and 4 regulations concerning electrical A maximum of 3 cable glands can be at power installations according to tached to the housing for cable entries VDE 0100 as well as the regulations of your local power supplier OOO el Retracts al Extends N N L al el N N L Magnet in version with fail safe action Limit switches optional Potentiometer optional 41 44 42 51 54 52 81 82 83 91 92 93 ey I g0 6 e A Fig 3 Terminal connections version for three point stepping signal 10 EB 8331 1 EN Caution Only connect to the main power network when the power is switched off Only use power interruption devices which ensure that the power cannot be switched on again unintentionally Electrical connections Particularly for 24 V 50 Hz actuators use wires with a sufficiently large c
2. by the associated activated limit switch on the board Fig 5 on page 13 To proceed adjust the shaft of the potenti ometer 12 1 by turning it gradually clock wise or counterclockwise with a screwdriver until the signal lamp stops blinking and is constantly illuminated Turn the screwdriver counterclockwise if the upper signal lamp 8 blinks and clockwise if the lower signal lamp 9 blinks corresponding to the icons 7 Travel calibration does not continue until both signal lamps are illuminated at the same time Note If both signal lamps start to blink simulta neously during travel calibration interrupt calibration by pressing the travel calibration button 4 and check the mounting position of the potentiometer gear 12 again IF no travel motion can be determined dur ing calibration e g due to a loose or miss ing potentiometer gear both signal lamps blink alternately If this is the case interrupt travel calibration by pressing the button 4 correct the error and restart calibration by pressing the but ton 4 again Setting with limited travel range Travel calibration is usually based on the maximum travel of the control valve If however the maximum possible travel is to be limited to a smaller travel end value press the button 4 once at the start of cali bration while the signal lamp blinks for 10 seconds As a result travel calibration via the potentiometer gear with rated travel 15
3. or 30 is limited to 6 mm Each time the button is pressed the travel range is in creased by 1 mm If for example a control valve designed for 15 mm is to be operated with a limited travel range of 10 mm press the button 4 5 times during the 10 second time limit The top signal lamp 8 flashes each time the key is pressed Reporting defined events At the binary output terminal 83 and 84 predefined events can be indicated see EB 8331 2 EN during positioner operation and transmitted to a control room Retrofitting additional electrical equipment 5 Retrofitting additional electrical equipment The actuator can be subsequently equipped with two limit switches two potentiometers or a digital positioner Depending on the actuator version used the actuator board needs to be replaced as well The actuator version is marked on the name plate e g model 3374 11000002000 When ordering additional electrical equip ment from the manufacturer make sure to include this model number in the order Caution When installing electrical equipment make sure the supply voltage and the signal input are disconnected Only use power interrup tion devices which are protected against un intentional reconnection of the power sup ply Note It is recommendable to slightly apply lubri cant e g Vaseline to the spindles on the gear faces and to the sides of the cogs EB 8331 1EN 17 Retrofitting additional
4. 2 Position of the cam bracket 7 For actuator stem retracts For actuator stem extends Fig 7 Retrofitting limit switches in this example model 3374 1 1000002000 version with potentiometers EB 8331 1 EN 19 Retrofitting additional electrical equipment 5 2 Potentiometers Actuators with a digital positioner cannot be equipped with potentiometers To install the potentiometers an actuator board with the appropriate potentiometers and gears 12 and 13 is required If the actuator is not already equipped with limit switches the basic unit order no 1400 8829 is also required The unit in cludes the spindle gear 2 and the interme diate gear 5 1 Remove the fastening screws Push the actuator board 1 from its guiding to the right Take out the board and re place it with a board with potentiom eters 2 Clip the spindle gear 2 onto the sleeve 3 as illustrated in Fig 7 top Make 1 Actuator board 10 Serrated ring 2 Contact cam 12 Gear potentiometer 1 5 Intermediate gear 13 Gear potentiometer 2 10 5 2 13 12 1 Fig 8 Version with potentiometer 20 8331 1 EN sure the lateral latch is properly en gaged in the groove of the sleeve Plug intermediate gear 5 onto the spin dle 4 Place the serrated ring 10 on top and push it down until it will not go any further The potentiometer gears 12 and 13 with retaining rings must be pu
5. 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 1 1 1 1 2 2 2 1 2 2 3 4 4 1 4 2 4 2 1 4 2 2 4 3 5 5 1 5 2 5 3 5 3 1 5 3 2 2 EB 8331 1 EN Page Design and principle of operation 5 Additional equipment 5 Technical data s o o un 200 or BA wae 6 8 Mounting position si 2 2 lle 8 Attachment to the valve 8 Electrical 5 10 Operation and setting 12 Manual operation of 12 Setting the additional equipment 2 222 0 0 0 0 0000 12 irc EP 12 Potentiometers 12 Setting the digital 14 Retrofitting additional electrical equipment 17 vi Be LS 18 Potentiometers duse e e a ae PbS ee ee E A 20 Digital positioner Reha haw aly md Ra wd we ED 21 Calibrating the positioner 2 22 ess 22 Simplest method to calibrate actuator 2 222 2222 20 22 23 Safety instructions General safety instructions Assembl
6. acy lt 2 5 without taking the dead band into account Maximum two current inputs may be switched in series 2 Maximum values 50 mA or 25 V 3 SAMSON TROVIS VIEW Operator Interface software SAMSON memory pen 4 Can only be taken from current or voltage signal 5 Not when retrofittable interface is used 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 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 EB8331 1 EN the top of the coupling nut 8 is reached Secure positi
7. el s Actuating time in case of 12 fail safe action s Nominal thrust 2 5 KN i 0 5 kN Stem extends or retracts Stem extends Stem retracts Power supply 207 V to 253 V 50 Hz or 21 6 V to 27 6 V 50 Hz 90 V to 127 V 60 Hz other voltages on request Power consumption VA Without positioner With positioner 7 5 13 9 5 15 10 5 16 12 5 18 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 Suspended mounting position not approved Overvoltage category Design and inspection EN 61010 Edition 3 94 Class of protection 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 Manual adjustment of actuators with fail safe action only possible when supply voltage is applied see also section 4 1 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 2 to 10000 0 to 900 Q at rated travel max permissible current 1 mA N Cable glands M20 x 1 5 with meta
8. electrical equipment 5 1 Limit switches The retrofit kit order no 1400 8830 is re quired to install limit switches If the actuator is not already equipped with potentiometers or a positioner the basic unit order no 1400 8829 is also required The unit in cludes the spindle gear 2 and the interme diate gear 5 Note To mount the limit switches the actua tor stem must be in end position i e the stem must be either fully extended or fully retracted If necessary move the stem to the appropriate position using the manual over ride on the side 1 Remove the fastening screws Push the actuator board 1 from its guiding to the right Slightly lift the board and con tinue pushing it further towards the cable entry 2 Clip the spindle gear 2 onto the sleeve 3 Make sure the lateral latch is prop erly engaged in the groove of the sleeve 3 Plug intermediate gear 5 onto the spin dle 4 Place the serrated ring 10 on top and push it down until it will not go any further 4 Plug both premounted contact cams 6 with the ring gear first onto the cam bracket 7 5 Push adjustment gears 8 onto their spindles and fasten with one screw each Check whether the adjustment screws can be turned easily If not slightly loosen the screw again 18 8331 1 EN Turn both contact cams 6 as illustrated in Fig 7 1 corresponding with the posi tion of the actuator stem on the cam bracket 7 Pus
9. ermediate gear Intermediate gear Position for rated travel 15 Rated travel inscription Gear 12 Position for rated travel 30 Fig 6 Selector switch and position of potentiometer gears in version with digital positioner 8331 1 EN 15 Operation and setting as it will go to the valve s CLOSED position Calibration is carried out when both signal lamps 8 and 9 are lit Travel calibration starts after the mounting position of the potentiometer gear 12 has been determined automatically This is indi cated by signal lamp 8 for 6 to 35 mm travel and by signal lamp 9 for 6 to 20 mm travel When travel calibration starts the lower sig nal lamp 9 blinks quickly for about 10 sec onds The actuator stem retracts as far as it will go maximum travel valve OPEN Travel calibration is successfully completed when the end position is reached The actu ator is in control operation The actuator stem moves to the valve position determined by the reference variable Note If one of the signal lamps starts to blink slowly after the travel calibration button has been pressed and the actuator stem has ex tended to the valve s CLOSED position the potentiometer shaft 12 1 has been wrongly positioned Readjust it manually 16 8331 1 EN Do not adjust the potentiometer before the closed position is actually reached This is indicated
10. ersion 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 us ing an M30 x 1 5 ring nut are preferably combined with Series 240 Valves and Type 3214 DN 125 to 150 Design and principle of operation 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 O 2 to 10 V or 4 0 to 20 mA Refer to section 5 for details on retrofitting additional equipment 8331 1 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 240 120 240 120 120 rated trav
11. h the spacer 9 onto the spindle for the cam bracket Push the cam bracket with both cams onto the spindle corre sponding with the position of the actua tor stem as illustrated in Fig 7 2 Make sure that the outermost cog of the cam bracket 7 engages in the gearwheel of the intermediate gear 5 In addition the adjustment gears 8 must engage properly in the corresponding gears of the contact cams 6 Secure the cam bracket 7 and interme diate gear 5 with the serrated ring 10 pushing the ring down until it will not go any further Position the terminal board 11 at the base of the support at a 45 angle approx with the switches facing to wards the gears Push the upper end of the terminal board towards the gears until the board is in a vertical position and properly engaged in the support 10 Push the actuator board 1 back into its guiding Make sure that the gears are properly engaged Fasten the board us ing screws Adjust limit switches as described in sec tion 4 2 1 Retrofitting additional electrical equipment Actuator board 9 Spacer Spindle gear 10 Serrated ring Sleeve 11 Terminal board with Spindle microswitches Intermediate gear 12 Gear in version Contact cam with potentiometer Cam bracket O Adjustment gear 7 1 Position of the contact cams 6 on the cam bracket 7 or actuator stem retracts extends 7
12. he torque dependent switches switch off the actuator The position of the potentiometer is checked A Re adjust the potentiometer if neces sary while observing the signal lamps Refer to the description given on page 14 of EB 8331 2 EN After adjusting the potentiometer the calibration of the actuator is continued 22 8331 1 EN 6 Dimensions in mm Version with yoke 193 I 60 294 Stem connector Version with ring nut 8331 1 EN 23 SAMSON AG MESS UND REGELTECHNIK Weism llerstra e 3 60314 Frankfurt am Main Germany Phone 49 69 4009 0 Fax 49 69 4009 1507 Internet http www samson de EB 8331 1 EN S Z 2007 10
13. ith operating modes 3 und 0 is described in Mounting and Operating Instructions EB 8331 2 EN Settings for operating modes 1 and 2 Increasing characteristic actuator stem re tracts or extends as the reference variable increases After the actuator has been mounted on the valve as described in section 2 2 and the electrical connections have been established as described in section 3 proceed as fol lows 14 8331 1 EN 1 Set selector switch 2 with the arrow pointing to operating mode 0 control switched off 2 Check mounting position of the potenti ometer gear 12 The gear must be put onto the potentiometer shaft to correspond with the rated travel of the control valve The inscription Nennhub 15 for 6 to 20 mm travel or Nennhub 30 for 6 to 35 mm travel must be legible from above on the associated gear side If this is not the case pull the gear off the shaft and put it back on again with the reverse side facing upwards allow ng the intermediate gear to engage prop erly Note Actuators with fail safe action Actuator stem retracts or extends are only de signed for a rated travel of 15 mm Do not rearrange the gear Make sure that the shaft of the potentiometer 12 1 is adjusted correctly 3 Switch on auxiliary power and set the reference variable to a value gt 4 mA A Set selector switch 2 with the arrow pointing t
14. l nut width across flats 23 24 mm 21 Not for version with positioner 6 8331 1 EN Design and principle of operation Digital positioner Operating mode 1 Operating mode 2 Operating mode 3 Ran 4 20 mA Ri 0 05 kQ 0 20 mA Ri 0 05 ko ASpersetings 3 Input variable 2 ange 2 10 V Ri 10 ko 0 10 V Ri 10 ko pe 9 Resolution 10 Bit Ronde 4 20 mA Rg 0 2 lt kQ 0 20 mA Rg lt 0 2 ko Arneri Position feedback ang 2 10 V R25 ko 0 10 V R25 ko P 9 signal 4 5 Resolution 8 Bit characterise Increasing actuator stem retracts or extends As per settings 3 as the input variable increases 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 Settin Using travel calibration button As per settings 3 a 1 mm each time the button is pressed 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 Accur
15. o operating mode 1 for 4 to 20 mA or 2 to 10 V input and alarm signal or set it to operating mode 2 for O to 20 mA or O to 10 V input and alarm signal 5 Press button 4 to start travel calibra tion Operation and setting Press the button briefly to obtain a travel ion calibration for valve CLOSED when the actu N Caution The automatic travel calibration lasts ator stem extends Direction of action Increasing increasing a a 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 test bench or when the travel calibration for valve CLOSED when shut off valves in the plant are the actuator stem retracts closed Direction of action Increasing decreasing After pressing the travel calibration but ton 4 the actuator stem first moves as far 1 Operating mode 1 7 8 9 2 Selector switch 3 Operating mode2 SAMSON 4 Travel calibration button 5 Operating mode O AS m 10 6 _ Operating mode 3 7 Potentiometer counter clockwise or clockwise AA T 8 Signal lamp 9 Signal lamp 10 Actuator stem extends and retracts 11 11 Interface jack 12 Potentiometer gear b gl 12 1 Potentiometer shaft Gear 12 Int
16. on 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 Installation Attachment to Series V 2001 Attachment te Series 240 Type 3260 DN 65 to 150 and Type 3214 DN 65 to 100 Actuator 2 1 Actuator yoke 2 2 Valve yoke 2 3 Bonnet Attachment to Type 3214 3 Actuator stem DN 125 to 250 4 Stem connector 5 Plug stem 6 Nut 7 Ring nut 8 _ Coupling nut 9
17. ross section to guarantee that the per missible voltage tolerances are not ex ceeded Limit switches optional 54 52 41 D CE of of Load max 25 mA Fig 4 Terminal connections version with digital positioner mA V Ran V Vo N L 1 31 2 13 12 1 81 82 83 84 NJL T Magnet in version with N fail safe action Position feedback Input Binary input Binary output Power supply active when voltage is applied 8331 1 11 Operation and setting 4 Operation and setting 4 1 Manual operation of the actuator To operate the manual override place 4 mm hex wrench on the red actuator shaft located at the side of the housing The hex wrench is delivered with the actuator It is attached to the bottom of the housing Manual override is only possible in actua tors with fail safe action when the power supply is connected terminals N and L Set the selector switch 2 in Fig 6 of the actuator with positioner to the operating mode 0 4 2 Setting the additional equipment To access the additional equipment unscrew the four fixing screws on the cover using a Pozidrive PZ2 screwdriver to provide enough hold on the screw heads Take off the cover After completing the settings and establish ing the electrical connection refasten
18. sponding with the rated travel of the control valve The rated travel inscription Nennhub 15 on the upper side with the retaining ring or Nennhub 30 lower side must be legible from above also see Figs 4 and 5 5 Push the actuator board 1 back into its guiding Make sure that the gears are properly engaged Fasten the board us ing screws Retrofitting additional electrical equipment 5 Intermediate gear 6 Contact cam 7 Cam bracket 8 Adjustment gears 10 Serrated ring 12 Gear feedback potentiometer Fig 9 Version with positioner without top and with bottom limit switches EB 8331 1 EN 21 Retrofitting additional electrical equipment 5 3 1 Calibrating the positioner Mount the actuator on the valve and set the positioner as described in section To calibrate the positioner proceed as de 4 3 of these instructions scribed in section 4 of EB 8331 2 EN 5 3 2 Simplest method to calibrate the actuator If tools such as the TROVIS VIEW software PC etc are not available for calibration of the actuator and the actuator operation with maximum precision is not necessary the simplest calibration method can be per formed as follows 1 Position the selector switch 2 to operat ing mode 0 lt 2 Press down the travel calibration button 5 for at least 15 seconds until both sig nal lamps light up 3 Release the button to start calibration The actuator stem extends until t
19. t onto their shafts corresponding with the rated travel of the control valve The rated travel inscription Nennhub 15 on the upper side with the retaining ring or Nennhub 30 lower side must be legi ble from above also see Figs 4 and 5 Push the actuator board back into its guiding Make sure that the gears are properly engaged Fasten the board us ing screws Adjust the potentiometer as described in section 4 2 2 5 3 Digital positioner To install a positioner a corresponding ac tuator board and TROVIS VIEW 3374 and connecting cable 0450 1978 are necessary If the actuator is not already equipped with limit switches the basic unit order no 1400 8829 is also required The unit in cludes the spindle gear 2 and the interme diate gear 5 Note Actuators with a digital positioner cannot be equipped with a potentiometer 1 Remove the fastening screws Push the actuator board 1 from its guiding to the right Take out the board and re place it with a board with positioner 2 Clip the spindle gear 2 onto the sleeve 3 as illustrated in Fig 7 top Make sure the lateral latch is properly en gaged in the groove of the sleeve 3 Plug intermediate gear 5 onto the spin dle 4 Place the serrated ring 10 on top and push it down until it will not go any further 4 The gear 12 on the feedback potenti ometer which is equipped with a retain ing ring must be put onto its shaft corre
20. tch Stem retracts Metal tag Stem extends Rated travel inscription Microswitch Spindle upwards Spindle downwards Intermediate gear Cam bracket Gear potentiometer 1 Potentiometer shaft Gear potentiometer 2 13 1 Potentiometer shaft Fig 5 Performing settings 8331 1 EN 13 Operation and setting 4 3 Setting the digital positioner In the actuator version with digital positioner the travel is calibrated automati cally allowing the travel controlled variable x and the input signal reference variable w of the positioner to be matched in the best possible way Additionally the digital positioner provides valve position feedback for remote transmission Setting and start up can be carried out us ing four different operating modes Oper ating modes 1 and 2 work with set data stored in the positioner s memory The user only needs to select the operating mode via the selector switch 2 and press the button 4 to start travel calibration Note Setup with operating modes 3 and 0 can only be performed using a SAMSON memory pen as the storage medium or in connection with SAMSON s TROVIS VIEW Configuration and Operator Interface soft ware and a PC or bus system Setup w
21. the cover To proceed place back on the cover and screw the cover screws in slightly to po sition the cover before tightening them prop erly Perform settings while the power is switched on 12 8331 1 EN 4 2 1 Limit switches 1 Use motor or manual override to move the control valve to the position where the switching function is to be activated 2 Use hex wrench to turn spindle 2 for the upper limit switch or spindle 3 for the lower limit switch until the associated contact cam on the cam bracket 7 trig gers the switch contact of the upper or lower microswitch 1 4 2 2 Potentiometers The gears of the potentiometers 12 and 13 must be put onto their shafts to correspond with the rated travel of the con trol valve The rated travel inscription Nennhub 15 or Nennhub 30 must be legible If this is not the case pull each po tentiometer gear off the shaft and put it back on again with the reverse side of the wheel facing upwards ensuring it is aligned roughly flush with the potentiometer shaft Zero point adjustment 1 Use motor or manual override to move the control valve to the desired end posi tion 2 Place screwdriver on the slotted potenti ometer shaft 12 1 and 13 1 3 Calibrate potentiometer using the con nected ohmmeter correspondingly Actuator stem extends 81 82 09 91 93 0Q Actuator stem retracts 81 83 09 91 92 0Q Operation and setting Limit swi
22. y 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 8331 1 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 8331 1 EN 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 v

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