Samson 3766 Mounting And Operating Instructions
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Samson 3766 Mounting And Operating Instructions

Pneumatic positioner
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EB 8355-1 EN
Translation of original instructions
Type 3766 Pneumatic Positioner
Edition October 2018

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Summary of Contents for Samson 3766

  • Page 1 EB 8355-1 EN Translation of original instructions Type 3766 Pneumatic Positioner Edition October 2018...
  • Page 2 Î For the safe and proper use of these instructions, read them carefully and keep them for later reference. Î If you have any questions about these instructions, contact SAMSON‘s After-sales Service Department (aftersalesservice@samson.de). The mounting and operating instructions for the devices are included in the scope of delivery.

  • Page 3: Table Of Contents

    Contents General safety instructions ................5 Design and principle of operation ..............6 Versions and article code ................9 Technical data .....................10 Additional equipment ...................12 Summary of explosion protection approvals ...........13 Mounting on control valves ................14 3.1 Direct attachment to Type 3277 Actuator ............14 3.2 Attachment according to IEC 60534-6 ............21 3.2.1 Mounting sequence ..................22 3.2.2 Initial adjustment of travel ................22...
  • Page 4 Contents After-sales service ..................49 7.1 Servicing explosion-protected devices ............49 7.2 Maintenance and calibration ................49 Dimensions in mm ..................50 Test certificates ....................51 EB 8355-1 EN...

  • Page 5: General Safety Instructions

    Directive 2014/30/EU. The Declaration of Conformity is available on request. NOTICE Models with index 3766-x...x.03 and higher are equipped with a hinged cover without their own exhaust air port. The required exhaust air connection is now included in the mounting accessories.

  • Page 6: Design And Principle Of Operation

    The pick-up lever (1) and the range spring The positioner is designed either for direct (4) must be selected to match the rated valve attachment to SAMSON Type 3277 Actua- travel and the nominal span of the reference tors or for attachment according to NAMUR variable.
  • Page 7 Design and principle of operation Travel Supply Lever Span adjuster Zero adjuster Clamp Turnboard Nozzle >> Xp restriction Nozzle <> Pressure regulator Diaphragm lever Booster Range spring Volume restriction Measuring Solenoid valve diaphragm (option) Fig. 1: Functional diagram and inside view EB 8355-1 EN...
  • Page 8 Design and principle of operation Positioner with position transmitter The tuning of the position transmitter ensures that both end positions "valve CLOSED" or A positioner containing a position transmit- "valve OPEN" as well as all intermediate po- ter cannot be equipped with integrated limit sitions can be signalized.

  • Page 9: Versions And Article Code

    Design and principle of operation 2.1 Versions and article code Pneumatic positioner Type 3766- x Explosion protection Without II 2G Ex ia IIC T6 according to ATEX CSA/FM intrinsically safe/non incendive Ex ia/Ex n I/IIC T6 IP 65 IECEx TSA Australia II 3G Ex nA II T6 acc. to ATEX Additional equipment Without Inductive limit contacts 2x SJ2-SN (Analog position transmitter 4 to 20 mA) 3/2-way solenoid valve Without 6 V DC 12 V DC 24 V DC Pneumatic connections ¼-18 NPT...

  • Page 10: Technical Data

    Design and principle of operation 2.2 Technical data Type 3766 Positioner Travel range 7.5 to 30 mm Direct attachment to Type 3277 Actuator 7.5 to 120 mm Attachment acc. to IEC 60534 (NAMUR) Opening angle 70°, 75° or 90° depending on the cam disk Reference Signal range 0.2 to 1 bar (3 to 15 psi) variable w Span 0.4 to 0.8 bar (6 to 12 psi) Overloadable Max. 2 bar (29 psi) Supply air 1.4 to 6 bar (20 to 90 psi) Air quality acc. to Maximum particle size and density: Class 4 · Oil content: Class 3 ISO 8573-1,...
  • Page 11 Design and principle of operation Effect of vibration None between 10 and 150 Hz and 4 g Explosion protection Refer to article code or list of approvals in Data Sheet u T 8355 Degree of protection IP 54 (IP 65 and NEMA 4X possible by fitting a filter check valve. See table on accessories on page 19) Compliance · Weight Approx. 1 kg With lowest setting of pressure regulator The limits in the type examination certificate additionally apply to explosion-protected versions. EB 8355-1 EN...

  • Page 12: Additional Equipment

    Design and principle of operation 2.3 Additional equipment Limit contacts 2 inductive proximity switches SJ2-SN Control circuit Values according to downstream transistor relay Hysteresis at rated travel ≤ 1 % Solenoid valve Input Binary DC voltage signal Nominal signal 6 V DC 12 V DC 24 V DC Signal '0' (no response) ≤ 1.2 V ≤ 2.4 V...

  • Page 13: Summary Of Explosion Protection Approvals

    Design and principle of operation 2.4 Summary of explosion protection approvals Type Certification Type of protection Number PTB 01 ATEX 2171 ATEX II 2G Ex ia IIC T6 Date 2001-11-26 3766-1 Number RU C DE.08.00697 Type 3766-1: 1Ex ia IIC T6/T5/T4 Gb X Date 2014-12-15 Type 3766-8: 2Ex nA IIC T6/T5/T4 Gc X Valid until 2019-12-14 Number 1607848 Ex ia IIC T6; Class I Zone 0; Class I, II, Div. 1, Groups A, B, C, D, E, F, G; Date 2005-09-16 Class I, II, Div. 2, Groups A, B, C, D, E, F, G;...

  • Page 14: Mounting On Control Valves

    If the required operating direction does not correspond to the visible symbol or if you The positioner can be mounted either directly want to change the operating direction, re- to SAMSON Type 3277 Actuator or to con- move the fastening screw at the turnboard, trol valves with cast yokes or rod-type yokes turn the board by 180° and refasten the according to IEC 60534-6 (NAMUR).
  • Page 15 Mounting on control valves Actuator stem extends Internal signal Operating Operating pressure connection direction >> Left direction <> Right attachment Connection block attachment Tip of gasket (16) Actuator stem retracts Signal pressure connection over piping Operating direction <> Left Operating attachment direction >> Right attachment Side view of connection block With switch plate (old)
  • Page 16 Mounting on control valves 1. Fasten the clamp (1.2) to the actuator the actuator symbol with the arrow mark- stem, making sure that the fastening ing. screw rests in the groove of the actuator 8. Place the connection block with the asso- stem.
  • Page 17 Mounting on control valves Air purging of the spring chamber Type 3277-5 Actuators with an effective If the spring chamber of the actuator is to be diaphragm area of 120 cm², the exhaust air purged with the exhaust air from the from the positioner is connected to the spring positioner, use piping (Table 3) to connect chamber over an internal hole. the spring chamber (with "actuator stem NOTICE extends"...
  • Page 18 Mounting on control valves Table 1: Lever (see Fig. 3) Mounting kit Actuator size Lever with associated clamp and intermediate plate Order no. Standard version 1400-7116 120 cm² D1 lever with stopper for output (38) Version compatible with paint 1402-0944 Standard version 1400-6370 240/350 cm²...
  • Page 19 Mounting on control valves Accessories Order no. G ¼ 1400-7458 Pressure gauge mounting block (only for 120 cm²) ¼ NPT 1400-7459 Stainless steel/brass 1400-6950 Pressure gauge mounting kit for supply pressure and signal pres- sure Stainless steel/stainless steel 1400-6951 Filter check valve, replaces vent plug and increases the degree of protection to IP 65 Polyamide, 1790-7408 IP 65 degree of protection 1.4301, IP 65 degree of 1790-7253 protection Filter check valve in housing with G ¼ thread Polyamide, 1790-9645 NEMA 4 degree of protection 1.4301,...
  • Page 20 EB 8355-1 EN...

  • Page 21: Attachment According To Iec 60534-6

    Mounting on control valves 3.2 Attachment according to IEC 60534-6 Required mounting parts are listed in Ta- ble 5. The rated travel of the valve deter- mines which lever and range spring (Ta- ble 6) are required. An adapter housing is used for attachment (Fig. 6). The valve travel is transmitted by the Spring Screw plug lever (18) and the shaft (25) to the bracket Fig. 4: Installing the spring on the back of the (28) of the adapter housing and then passed housing on to the pin (27a) on the lever of the posi-...

  • Page 22: Mounting Sequence

    Mounting on control valves 3.2.1 Mounting sequence ward when the positioner is attached with the air connection at the front. Î Mounting parts and range spring: see 6. Attach the lever (18) including clamping Table 4/Table 5; mounting according to plate (22) to the shaft (25), making sure Fig. 6. that the clip clasps the pin (19). Valve with cast yoke 3.2.2 Initial adjustment of...
  • Page 23 Mounting on control valves Mounting position Attachment to NAMUR rib 24 25 21 20 Lever N1, N2 Attachment to Plate rods Clip Clamping plate Screw Pointer Shaft Lever of positioner 27a Coupling pin 27b Lock nut Bracket Studs Plate Nuts Mounting bracket Fig. 6: Attachment according to IEC 60534-6 (NAMUR) EB 8355-1 EN...
  • Page 24 Mounting on control valves Table 5: Mounting kits Control valve Travel [mm] With lever Order no. 7.5 to 60 N1 (125 mm) 1400-6787 Valve with cast yoke 22.5 to 120 N2 (212 mm) 1400-6789 20 to 25 1400-6436 20 to 25 1400-6437 NAMUR mounting kit, See Fig. 6 for parts Rod diameter 25 to 30 1400-6438 [mm] of rod-type 25 to 30 1400-6439 yoke 30 to 35 1400-6440 30 to 35...

  • Page 25: Attachment To Rotary Actuators

    Order no. Table 7: Complete mounting parts, including range spring 2, but not including the cam disk Actuator acc. to VDI/VDE 3845 (September 2010), level 2 1400-8815 160 cm² 1400-7103 SAMSON Type 3278 Actuator VETEC Type S 320 cm² 1400-7104 VETEC Type R R 110 to R 250 1400-7117 Camflex I, DN 25 to 100...

  • Page 26: Mounting The Lever With Feeler Roll

    3.3.2 Mounting the interme- Double-acting springless rotary actuators re- diate piece quire the use of a reversing amplifier on the connection side of the positioner housing SAMSON Type 3278 Actuator (see section 3.3.4). 1. Fasten the adapter (36) to the free shaft When using a reversing amplifier, the pres- end of the rotary actuator. sure regulator (9, Fig. 1) must be turned clockwise as far as it will go (also see sec- 2.
  • Page 27 Mounting on control valves Attachment SAMSON Type 3278 Attachment acc. to VDI/VDE 3845 (09/2010) Vent plug or filter check valve Positioner Intermediate piece Lever with feeler roll Adapter Transmission lever Screws Dial plate Cam disk Washer Mounting bracket Stem connector Gasket Fig. 7: Attachment to rotary actuators...

  • Page 28: Basic Setting Of The Cam Disk

    Mounting on control valves 3.3.3 Basic setting of the cam Each cam disk carries two cam sections whose starting points are indicated by small disk holes. Depending on the operating direction The valve model used determines the basic of the rotary actuator (air-to-open or air-to- setting of the cam disk.
  • Page 29 Mounting on control valves Single-acting rotary actuator with spring-return mechanism Linear cam disk (equal percentage cam disk is represented by a broken and dotted line) Control valve opens counterclockwise For valves that open clockwise, the cam disk must be turned over so that lever with feeler roll moves over the same disk segments as shown in the images below, but with the cam disk turning clockwise.
  • Page 30 Mounting on control valves Double-acting, springless rotary actuator with reversing amplifier Linear cam disk (equal percentage cam disk is represented by a broken and dotted line) View from the positioner onto the actuator shaft Control valve opens counterclockwise – Based on a closed valve Direct operating direction >>...
  • Page 31 Mounting on control valves Securing the aligned cam disk To prevent the cam disk from turning, drill a hole into the adapter (36) or coupling (44) to allow a 2 mm dowel pin to be inserted. Select one of the four holes located around the center hole of the cam disk to secure the cam disk in position. EB 8355-1 EN...

  • Page 32: Reversing Amplifier For Double-Acting Actuators

    (1.1). For the use with double-acting actuators, the 4. Use a screwdriver (8 mm wide) to screw positioner must be fitted with a reversing am- the enclosed filters (1.6) into the connec- plifier, e.g. the SAMSON Type 3710 Revers- tion boreholes A and Z. ing Amplifier (see Mounting and Operating Signal pressure connections Instructions u EB 8392). : Connect output A...
  • Page 33 Mounting on control valves From the positioner Output 38 Supply 9 Control signals to the actuator Reversing amplifiers 1.1 Special screws 1.2 Gasket 1.3 Special nuts 1.4 Rubber seal 1.5 Stopper 1.6 Filter 1.3 1.2 Fig. 10: Mounting a reversing amplifier EB 8355-1 EN...

  • Page 34: Connections

    Connections 4 Connections NOTICE 4.1 Pneumatic connections If you intend to replace older models with in- dex 3766-x...x.02 or lower, the mounting The pneumatic connections are optionally parts may need to be replaced as well. designed as a bore with ¼ NPT or G ¼ thread. Customary fittings for metal or cop- per tubing or plastic hoses can be used.
  • Page 35 Connections Actuator stem retracts (FE): Fail-open (for globe and angle valves) For tight-closing valves, the maximum signal pressure pst is roughly estimated as fol- lows: d² · π · ∆p = F + [bar] 4 · A = Seat diameter [cm] ∆p = Differential pressure across the valve [bar] = Actuator area [cm²] = Upper bench range value of the...

  • Page 36: Electrical Connections

    Connections 4.2 Electrical connections (e.g. polyethylene) must not be smaller than 0.2 mm. The diameter of an individual wire in a DANGER fine-stranded conductor must not be smaller For electrical installation, observe the than 0.1 mm. Protect the conductor ends relevant electrotechnical regulations and the against splicing, e.g. by using wire-end fer- accident prevention regulations that apply in rules.

  • Page 37: Switching Amplifier

    Connections The wires for the reference variable must be Accessories: connected to the terminals 11 and 12 locat- Cable gland M20x1.5: ed in the housing. Version Order no. Clamping In general, it is not necessary to connect the range positioner to a bonding conductor. Should Black plastic 1400-6985 5.5 to 13 mm...

  • Page 38: Operation

    Operation 5 Operation (>> or <>), this starting point can be either the lower or upper range value (0.2 or 1 bar) of the reference variable. 5.1 Tuning the positioner The reference variable range and thus the mounted onto the control upper range value determine the travel of valve the valve.

  • Page 39: Adjusting The Proportional Band Xp And Air Delivery Q

    Operation 5.1.1 Adjusting the proportional 5.1.2 Settings for actuator with band Xp and air delivery “actuator stem extends” fail-safe action 1. Close the volume restriction (11) as far NOTICE as the required positioning speed per- mits. To allow the valve to close with full force, the Check the positioning speed by pushing diaphragm chamber must be fully vented the diaphragm lever (3) as far it will go.

  • Page 40: Settings For Actuator With "Actuator Stem Retracts" Fail-Safe Action

    Operation If the upper range value is incorrect, turn the Starting point (e.g. 1 bar) span adjuster (travel). Four turns correspond 1. Adjust the input signal to 1 bar at the to a travel change of 10 % in standard oper- pressure adjuster. ation. In split-range operation, this value is 2. Turn the zero adjuster (6.2) until the reduced by half. valve just starts to move from its initial Turn the adjuster clockwise to reduce the position.

  • Page 41: Changing The Operating Direction

    Operation 5.2 Changing the operating di- 4. Turn the zero adjuster (6.2) again until the pressure gauge indicates the required rection signal pressure (see section 4.1.2). If the operating direction of directly attached 5. If no pressure gauge has been installed, positioners (Fig. 2) is to be changed after set the starting point to 0.97 bar instead. they have been installed, turn the turnboard (7) and change the position of the connec- NOTICE tion block, positioner and clamp (1.2).

  • Page 42: Adjusting The Limit Contacts

    Operation 5.3 Adjusting the limit contacts The terminals 41/42 and 51/52 can option- ally be assigned to the switches A and B by The positioner version with inductive limit turning the associated label on the terminal contacts has two adjustable tags mounted on block (also see Fig. 11). a rotary shaft which operate the associated proximity switches (50).
  • Page 43 Operation Adjusting the switching point Move the valve to the switching point and adjust the tag by turning the adjustment screw (53) so that the switching point is reached and indicated by the LED on the switching amplifier. To guarantee the switching under all ambient conditions, adjust the switching point ap- prox. 2 % before the mechanical stop (OPEN/CLOSED).

  • Page 44: Adjusting The Position Transmitter

    Operation 5.4 Adjusting the position Zero point transmitter Use the switches 1 and 2 to roughly set the zero point and the ZERO potentiometer for fine-tuning. The adjusted value is always NOTICE based on a 4 mA signal. The starting point (zero) and upper range Span value (span) must be set before adjusting the position transmitter.
  • Page 45 Operation Zero point adjustment Adjusting the span 1. Use the input signal of the positioner to 1. Use the input signal of the positioner to move the valve to closed position (valve move the valve to closed position (valve CLOSED, travel 0 %). CLOSED, travel 100 %).
  • Page 46 Operation Note The following applies to positioners with adapter housing for NAMUR attachment: When the positioner and the position transmitter signal have different operating directions (<< and <>), it may be impossible to adjust the zero point of the transmitter signal due to the additional deflection caused by the bracket (28) of the adapter housing.

  • Page 47: Upgrading The Positioner

    Upgrading the positioner 6 Upgrading the positioner 7. Change model index on the nameplate to Type 3767 i/p Positioner. The pneumatic positioner (3766-x...x.04 and higher) can be converted to form a Note Type 3767 Electropneumatic Positioner. For details on Type 3767 Positioners, refer to Mounting and Operating Instructions NOTICE u EB 8355-2. Upgrade of explosion-protected versions on- ly on request.
  • Page 48 Upgrading the positioner Table 11: Conversion kits Required input signal Required i/p module Required upgrade kit (reference variable) (order no.) (order no.) 4 to 20 mA 6112-041110 1400-7574 0 to 20 mA 6112-042110 1 to 5 mA 6112-043110 EB 8355-1 EN...

  • Page 49: After-Sales Service

    After-sales service 7 After-sales service 7.2 Maintenance and calibra- tion 7.1 Servicing explosion-pro- Interconnection with intrinsically safe circuits tected devices to check or calibrate the equipment inside or outside hazardous areas is to be performed If a part of the device on which the explosion only with intrinsically safe current/voltage protection is based needs to be serviced, the calibrators and measuring instruments to...

  • Page 50: Dimensions In Mm

    Dimensions in mm 8 Dimensions in mm Pneumatic connections G ¼ or ¼ NPT M20 x 1.5 19.5 Output (38) Input signal Supply (9) Reversing amplifier (optional) Ø110 Attachment IEC 60534-6 (NAMUR) with adapter housing Attachment with intermediate piece for rotary actuators Pneumatic connection reversing amplifier Fulcrum of Output 1 (A1) actuator shaft 28.5...

  • Page 51: Test Certificates

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  • Page 76 EB 8355-1 EN SAMSON AKTIENGESELLSCHAFT Weismüllerstraße 3 · 60314 Frankfurt am Main, Germany Phone: +49 69 4009-0 · Fax: +49 69 4009-1507 samson@samson.de · www.samson.de...

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