Samson 3374 Mounting And Operating Instructions
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Samson 3374 Mounting And Operating Instructions

Samson 3374 Mounting And Operating Instructions

Electric actuator version with three-step signal
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MOUNTING AND OPERATING
INSTRUCTIONS
EB 8331-3 EN
Translation of original instructions
Type 3374 Electric Actuator
Version with three-step signal
Edition May 2025

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  • Page 1 MOUNTING AND OPERATING INSTRUCTIONS EB 8331-3 EN Translation of original instructions Type 3374 Electric Actuator Version with three-step signal Edition May 2025...

  • Page 2: Definition Of Signal Words

    These mounting and operating instructions (EB) assist you in mounting and operating the device safely. The instructions are binding for handling SAMSON devices. The images shown in this document are for il- lustration purposes only. The actual product may vary.

  • Page 3: Table Of Contents

    Contents Contents Safety instructions and measures....................5 Notes on possible severe personal injury....................6 Notes on possible personal injury......................6 Notes on possible property damage......................7 Warnings on the device..........................8 Markings on the device........................9 Nameplate...............................9 Design and principle of operation....................10 Mounting types............................
  • Page 4 Contents Repair............................... 39 13.1 Returning the actuator to SAMSON......................39 Disposal............................40 Certificates............................41 Appendix............................47 16.1 Parts for retrofitting and accessories.......................47 16.2 After-sales service............................48 EB 8331-3 EN...

  • Page 5: Safety Instructions And Measures

    Intended use tation. The Type 3374 Electric Actuator is designed to oper- ate a mounted globe valve used in industrial appli- _ Check with the plant operator for details on fur- cations as well as in heating, ventilation and air-con- ther protective equipment.

  • Page 6: Notes On Possible Severe Personal Injury

    Chapter 15. the supply voltage and protect it against unin- The product (Type 3374) with a CE marking is de- tentional reconnection. signed for use in low voltage installations. _ Only use protective equipment that can be pro-...

  • Page 7: Notes On Possible Property Damage

    NOTICE Risk of damage to the electric actuator due to over-torquing. Observe the specified torques when tightening the mounting parts of Type 3374 Electric Actua- tors. Over-torquing leads to parts wearing out more quickly. _ Observe the specified tightening torques. NOTICE Risk of damage to the electric actuator due to incorrect operation of the manual override.

  • Page 8: Warnings On The Device

    Safety instructions and measures Warnings on the device Warning symbols Meaning Location on the device General warning Inside the actuator _ Refer to the mounting and oper- ating instructions. Class of protection II Actuator housing (only applies when the housing cover is attached and fastened) _ Refer to the mounting and oper- ating instructions.

  • Page 9: Markings On The Device

    Markings on the device 2 Markings on the device Nameplate The nameplate shown was up to date at the time of publication of this document. The nameplate on the device may differ from the one shown. Type designation Material number Serial number Date of manufacture Identification code (scannable)

  • Page 10: Design And Principle Of Operation

    Mounting types Construction with integrated yoke The Type 3374 Actuator is available with an inte- grated yoke (see Fig. 1). Fig. 1: Construction with integrated yoke (form B) Construction with ring nut The Type 3374 Actuator is available with an...

  • Page 11: Non-Floating Torque Switches

    Fail-safe action tor over gear wheels. The resistance value, which is proportional to the valve travel, can be used for po- The Type 3374 Actuator is available with fail-safe sition feedback. action. The actuators with fail-safe action have a It is possible to retrofit the resistance transmitter. It spring assembly and an electromagnet.

  • Page 12: Technical Data

    Design and principle of operation Technical data Table 1: Technical data · General Type 3374 Form  Fail-safe action Without Actuator stem extends Actuator stem retracts Testing according to DI- ✓ – – N EN 14597 Rated travel in mm Motor switch-off Torque switches Operating mode S1 - 100 % according to EN 60034-1...
  • Page 13 Design and principle of operation Table 2: Technical data · Version with three-step signal Type 3374 Thrust in kN Extends Retracts Nominal thrust of safety spring in kN – – – – Only possible with hex wrench when supply voltage is con- nected (see Chapter 8)

  • Page 14: Dimensions

    The dimension h indicates the minimum clearance required to be able to operate the actuator. Sufficient clearance must be available to facilitate wiring and operation. SAMSON recommends a minimum clearance of 600 mm. Fig. 3: Dimensions in mm · Type 3374-10, -11, -21 and -31 (form B) When the actuator stem is fully extended Legend for Fig.
  • Page 15 Design and principle of operation Fig. 4: Dimensions in mm · Type 3374-15, -17, -26 and -36 (form A) When the actuator stem is fully extended Legend for Fig. 4: Dimension h Dimension h Type 3374 Dimension h 30 mm 90 mm ≥100 mm 15 mm 75 mm...
  • Page 16 Design and principle of operation Fig. 6: Dimensions in mm · Type 3374-35, form A version When the actuator stem is fully retracted 32.3 Fig. 7: Dimensions in mm · Handwheel as special version EB 8331-3 EN...

  • Page 17: Shipment And On-Site Transport

    2. Check the shipment for transportation damage. _ Avoid long storage times. Report any damage to SAMSON and the for- warding agent (refer to delivery note). _ Contact SAMSON in case of different storage condi- tions or longer storage periods. Removing the packaging from the actuator...

  • Page 18: Installation

    Installation 5 Installation Mounting the actuator 5.3.1 Construction with integrated The work described in this chapter is to be per- yoke (form B) formed only by personnel appropriately qualified to carry out such tasks. For mounting on: Installation conditions – Series V2001 (DN 15 to 50) –...
  • Page 19 3. Place the actuator with yoke on the valve and fasten using the screws (11). Note A spacer (see Chapter 16) is required to mount a Fig. 10: For example, Type 3374-21 Electric Actuator, Type 3323 Three-way Valve. mounted on a Series V2001 Globe Valve 4. Switch off the supply voltage.
  • Page 20 Installation Types 3374-10/-11/-21/-31 Connection with yoke (form B) Mounting on Series V2001 Valves (DN 65 to 100) Fig. 12: Mounting · Version with actuator yoke and V2001 accessories Actuator Actuator yoke Actuator stem Plug stem Screws A spacer is required here to mount a Type 3323 Three-way Valve.

  • Page 21: Construction With Ring Nut (Form A)

    (valve closed) as described in Chapter 8.1.1. 7. Align travel indicator scale (10) with the middle of the stem connector (4) and screw tight. Types 3374-15, -17, -25, -26, -27, -35, -36 Connection with ring nut (form A) Mounting onto Series 240 Valves: Fig. 14: Actuating shaft for manual override (version with...
  • Page 22 (valve closed) as described in Chapter 8.1.1. 5. Align travel indicator scale (10) with the middle of the stem connector (4) and screw tight. Type 3374-15, -27 Connection with ring nut (form A) Mounting on Type 3214 (DN 125 to 250), balanced by a bellows Fig.

  • Page 23: Installing Additional Equipment

    – Mechanical limit contacts (see Fig. 19) (valve closed) as described in Chapter 8. Note Type 3374-15, -27 The retrofitting of the limit contacts varies depending Connection with ring nut (form A) on whether the actuator is fitted with resistance trans- For mounting on mitters or not.
  • Page 24 Installation Actuator without resistance transmitters _ See Fig. 20. SAMSON recommends applying a small amount of lu- bricant (e.g. Vaseline) to the spindles on the gear faces 1. Undo screws on housing cover and remove the and to the sides of the cogs.
  • Page 25 Actuator stem retracted Actuator stem extended Contact cam 11.1 Switch carrier 11.2 Fig. 22: Contact cam unit with actuator stem retracted Fig. 20: Inside view of Type 3374 Actuator Intermediate gear Spindle gear Serrated ring Tension spring Spacer 11.1 Spindle 1 Fig.

  • Page 26: Installing The Resistance Transmitters

    The rated travel inscription 'A' for 30 mm rated Fig. 24: Inside view · Type 3374 Actuator with resistance travel or 'B' for 15 mm rated travel must be legi- transmitters ble from above (see Fig.
  • Page 27 11.1 11.2 11.4 12 (actuator board) 11.3 Fig. 26: Inside view of Type 3374 Actuator without limit contacts Fig. 27: Inside view · Type 3374 Actuator with limit contacts Intermediate gear Actuator board Spindle gear Serrated ring Tension spring Serrated ring Shim 11.1 Spindle 1...

  • Page 28: Electrical Connection

    Installation Electrical connection Note A maximum of three cable glands can be mounted on the housing for cable entry. DANGER Risk of fatal injury due to electric shock. _ Connect the wiring according to the following _ Upon installation of the electric cables, you are re- wiring plans.
  • Page 29 Installation Controller Type 3374 Electric Actuator Signal feedforward for cascade control of several actuators after an actuator reaches its end position Only for version with fail-safe action The 'N' connection is not connected to the N terminals for actuator control. As a result, it is possible to connect an ex- ternal supply for 'L' and 'N' connections.

  • Page 30: Operation

    Operation 6 Operation Device overview and operating controls Fig. 32: Operating controls with the housing cover removed Rotary pushbutton Display Serial interface Terminals Actuating shaft for mechanical manual override Terminal board for limit contacts EB 8331-3 EN...

  • Page 31: Start-Up

    Start-up 7 Start-up Once the actuator has been mounted correctly and the wiring has been performed as described in Chapter 5, the electric actuator is ready for use and can be controlled by a three-step signal (see Chap- ter 3.5). Adjusting the limit contacts Fig.

  • Page 32: Zero Adjustment

    Start-up Fig. 38: Zero adjustment Legend for "Fig. 38: Zero adjustment" Fig. 37: Inside view · Retrofitting limit contacts Gear of potentiometer 1 22.1 Shaft of potentiometer 1 Intermediate gear Gear of potentiometer 2 Spindle gear 23.1 Shaft of potentiometer 2 Serrated ring Tension spring Zero adjustment...

  • Page 33: Setup

    Setup 8 Setup After connecting the supply voltage, the actuator is ready for use. The actuator stem follows the signal applied to the input terminals. The stem moves in the direction depending on which terminal the signal is applied Manual mode 8.1.1 Mechanical override To operate the manual override, place a 4 mm hex...

  • Page 34: Malfunctions

    Malfunctions 9 Malfunctions Troubleshooting _ See Table 5. Note Contact SAMSON's After-sales Service for malfunctions not listed in the table. Table 5: Troubleshooting Malfunction Possible reasons Recommended action Actuator stem does not move. Actuator is blocked. _ Check attachment. _ Remove the blockage.

  • Page 35: Servicing

    Only use original spare parts by SAMSON, which comply with the original specifications. The actuator requires no maintenance. SAMSON recommends inspection and testing according to the following table: Table 6: Recommended inspection and testing Inspection and testing Action to be taken in the event of a negative result...

  • Page 36: Decommissioning

    Decommissioning 11 Decommissioning Note The work described in this chapter is to be per- Actuator with fail-safe action move to the defined fail- formed only by personnel appropriately qualified to safe position after the supply voltage is switched off. carry out such tasks. DANGER Risk of fatal injury due to electric shock.

  • Page 37: Removal

    Removal 12 Removal Actuator with “Actuator stem extends” fail-safe action The work described in this chapter is to be per- 1. Make sure that a signal from the controller can- formed only by personnel appropriately qualified to not act upon the actuator. If necessary, discon- carry out such tasks.
  • Page 38 Removal Actuator with “Actuator stem extends” fail-safe action 1. Make sure that a signal from the controller can- not act upon the actuator. If necessary, discon- nect the wires connecting the controller. 2. Retract actuator stem as described in Chapter 8. 3.

  • Page 39: Repair

    _ Contact SAMSON's After-sales Service for service and repair work. 13.1 Returning the actuator to SAMSON Defective actuators can be returned to SAMSON for repair. Proceed as follows to return devices: 1. Remove the electric actuator from the valve (see Chapter 12).

  • Page 40: Disposal

    Simply e-mail us at aftersalesservice@samsongroup.com giving details of your company address. On request, SAMSON can appoint a service provider to dismantle and recycle the product as part of a distrib- utor take-back scheme. _ Observe local, national and international refuse regulations.

  • Page 41: Certificates

    EU declarations of conformity – EU type examination certificate – Declaration of incorporation The certificates shown were up to date at the time of publishing. The latest certificates can be found on our website: www.samsongroup.com > Products > Actuators > 3374 EB 8331-3 EN...
  • Page 42 Marcus Miertz Gert Nahler Senior Vice President Sales and Marketing Director Automation Technology SAMSON AKTIENGESELLSCHAFT · Weismüllerstraße 3 · D 60314 Frankfurt am Main Revision 08 Fon: +49 69 4009-0 · Fax: +49 69 4009-1507 · E-Mail: samson@samsongroup.com · Internet: www.samsongroup.com...
  • Page 43 Annex II, section 1.A. of the Directive 2006/42/EC For the following product: Type 3214/XXXX Electric Control Valve consisting of Type 3214 Valve and Type 3374, Type 3274 or Type 3375 Actuator We hereby declare that the machinery mentioned above complies with all applicable requirements stipulated in Machinery Directive 2006/42/EC.
  • Page 44 Frankfurt am Main, 10 October 2023 Norbert Tollas Peter Scheermesser Senior Vice President Director Global Operations Product Maintenance & Engineered Products Revision no. 00 Classification: Public · SAMSON AKTIENGESELLSCHAFT · Weismüllerstraße 3 · 60314 Frankfurt am Main, Germany Page 1 of 1...

  • Page 47: Appendix

    Resistance transmitter _ See Table 8. Gear wheel for resistance transmitter PCB 1992-5885 Table 8: Resistance transmitters · Selecting the actuator board Supply voltage Type 3374 -10 -11 -15 -21 -26 -31 -36 -25 -27 -35 Standard Order no. 100216330...

  • Page 48: After-Sales Service

    You can reach our after-sales service at the follow- ing e-mail address. aftersalesservice@samsongroup.com The addresses of SAMSON AG, its subsidiaries, rep- resentatives and service facilities worldwide can be found on our website ( www.samsongroup.com) or in all product catalogs.
  • Page 52 EB 8331-3 EN SAMSON AKTIENGESELLSCHAFT Weismüllerstraße 3 · 60314 Frankfurt am Main, Germany Phone: +49 69 4009-0 · Fax: +49 69 4009-1507 samson@samsongroup.com · www.samsongroup.com...

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