- DL manuals
- Samson
- Valve Positioners
- 3767
- Mounting And Operating Instructions
Samson 3767 Mounting And Operating Instructions
Summary of 3767
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Electropneumatic positioner type 3767 fig. 2 · type 3767 fig. 1 · type 3767 mounting and operating instructions eb 8355-2 en edition april 2011.
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Contents page 1 design and principle of operation . . . . . . . . . . . . . . . . . . . . 4 1.1 versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.2 technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2 attachment to control valve . . . . . . . . . . ...
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Eb 8355-2 en 3 safety instructions general safety instructions 4 the positioner may only be assembled, started up or operated by trained and experienced personnel familiar with the product. According to these mounting and operating instructions, trained personnel is referred to as individuals who ar...
Page 4: Design and Principle of
1 design and principle of operation the positioner consists of an electro- pneumatic converter unit (i/p converter) and a pneumatic unit equipped with a lever for travel pick-up, a measuring diaphragm, and the pneumatic control system with nozzle, diaphragm lever (flapper plate) and booster. The pos...
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Eb 8355-2 en 5 design and principle of operation 4 3 7 8 9 11 6.1 6.2 13 7 8 9 10 11 12 6.1 4 6.2 2.1 3 2.2 5 1 1.1 1.2 p e supply 9 v p st q x p p i ma 13 fig. 2 · functional diagram and inside view 1 pick-up lever 1.1 pin 1.2 clamp 2.1 nozzle >> 2.2 nozzle 3 diaphragm lever 4 range spring 5 measur...
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Positioner with position transmitter a positioner containing a position transmit- ter cannot be equipped with integrated limit switches or an integrated solenoid valve since the position transmitter requires most of the space inside. The position transmitter is used to establish a certain relationsh...
Page 7: 1.1 Versions
1.1 versions eb 8355-2 en 7 versions electropneumatic positioner type 3767- x x x 0 1 x x x x x x 0 0 0 explosion protection without 0 2 ii 2 g eex ia iic t6 acc. To atex 1 fm/csa intrinsically safe/non incendive 3 ii 3 g eex na ii t6 acc. To atex 8 additional equipment without 0 limit switch, induc...
Page 8: 1.2 Technical Data
1.2 technical data 8 eb 8355-2 en technical data positioner travel range, adjustable opening angle direct attachment: 7.5 to 30 mm attachment acc. To iec 60534-6: 7.5 to 120 mm or depending on the cam disk: 30 to 90° reference variable signal range span coil reference r i at 20 °c 4 (0) to 20 ma 8 t...
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Eb 8355-2 en 9 technical data inductive limit switches 2 proximity switches type sj 2-sn control circuit ratings according to downstream transistor relay hysteresis at rated travel £ 1 % solenoid valve input binary direct current signal nominal signal 6 v dc 12 v dc 24 v dc signal 0 (no pick-up), dc...
Page 10: Attachment to Control Valve
2 attachment to control valve the positioner is attached either directly to samson type 3277 actuator or to valves with cast yokes or with rod-type yokes in ac- cordance with iec 60534-6 (namur). When combined with an intermediate piece, the device can also be attached to rotary ac- tuators as a rot...
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Fig. 3 · mounting position and connections of type 3277 (top) and type 3277-5 120 cm 2 (bottom) actuators eb 8355-2 en 11 attachment to control valve actuator stem extends actuator stem retracts internal signal pressure connection connection block tip of gasket (16) op. Direction >> attachment left ...
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1. Screw the clamp (1.2) to the actuator stem. Make sure that the fastening screw is located in the groove of the actuator stem. 2. Screw the associated lever d1 or d2 (for 355/700 cm² actuator) to the pick-up le- ver of the positioner. 3. Fasten the distance plate (15) with the seal pointing toward...
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Use piping (table 3) to connect the spring chamber (with version "actuator stem ex- tends") to the connection block. To do so, re- move the plug from the connection block. For version "actuator stem retracts" and type 3277-5 actuators with an effective di- aphragm area of 120 cm², an internal bore h...
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14 eb 8355-2 en attachment to control valve table 1 mounting kit required lever with associated clamp and distance plate actuator size [cm²] order no. D1 with vent plug for output (38) connecting thread g ¼ ¼ npt 120 1400-6790 1400-6791 d1 (33 mm long with 17-mm-high clamp) 240 and 350 1400-6370 d2 ...
Page 15: 2.2 Attachment According to
2.2 attachment according to iec 60534-6 required mounting parts are listed in table 5. The rated travel of the valve determines which lever and range spring (table 6) are required. An adapter housing (fig. 7) is required for namur attachment. The valve travel is transmitted over the lever (18) and s...
Page 16: 2.2.1 Mounting Sequence
2.2.1 mounting sequence choose the required mounting parts and range spring from table 4 or 5 and install them as illustrated in fig. 7. Control valve with cast yoke 1. Screw the plate (20) to the stem connec- tor connecting the actuator and plug stems using countersunk screws. For 2100 and 2800 cm ...
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Eb 8355-2 en 17 attachment to control valve mounting position 2 1,5 1 24 25 22 32 31 20 19 19 21 20 23 18 29 30 28 26 a b 27b 27a fig. 7 · attachment according to iec 60534-6 (namur) attachment to namur rib attachment to rod-type yoke 18 lever n1, n2 19 pin 20 plate 21 clip 22 clamping plate 23 scre...
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18 eb 8355-2 en attachment to control valve table 5 control valve travel [mm] with lever order no. Namur mounting kit, refer to fig. 7 concerning parts valve with cast yoke 7.5 to 60 n1 (125 mm) 1400-6787 22.5 to 120 n2 (212 mm) 1400-6789 valve with rod-type yoke, rod diameter [mm] 20 to 25 n1 1400-...
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2.3 attachment to rotary actuators the positioner can also be attached to rotary actuators according to vdi/vde 3845 when the mounting kits and accessories listed in table 7 are used. Eb 8355-2 en 19 attachment to control valve table 7 · complete mounting parts , including range spring 2, but exclud...
Page 20: Lever
The rotary motion of these actuators is con- verted into a linear motion required by the pneumatic control unit of the positioner us- ing the cam disk of the actuator shaft and a cam follower roll on the positioner lever. Note: use table 7 to check whether the proper range spring (1 or 2) has been i...
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33 38 35 39 39 40 34 36 40 34 44 45 42 43 37 fig. 8 · attachment to rotary actuators eb 8355-2 en 21 attachment to control valve attachment to samson type 3278 attachment acc. To vdi/vde 3845 vent plug or filter check valve 33 positioner 34 intermediate piece 35 lever with cam follower roll 36 adapt...
Page 22: Disk
2.3.3 default setting of the cam disk the valve model used determines the default setting of the cam disk. Note: cam disks tailored to the special char- acteristic of a valve cause the valve to open in a non-linear or non-equal percentage way. The visible difference between the set point (4 to 20 ma...
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Eb 8355-2 en 23 attachment to control valve 90˚ 60˚ 30˚ 0˚ 90˚ 60˚ 30˚ 0˚ 90˚ 60˚ 30˚ 0˚ 90˚ 60˚ 30˚ 0˚ cam follower roll starting point i starting point n position at max. Signal pressure single-acting spring-loaded rotary actuator linear cam disk (equal percentage cam disk is represented by a brok...
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24 eb 8355-2 en attachment to control valve 90˚ 60˚ 30˚ 0˚ 90˚ 60˚ 30˚ 0˚ cam follower roll starting point n boreholes to secure the cam disk insert clip and press tongues outwards starting point i 0˚ 90˚ 60˚ 30˚ 0˚ 90˚ 60˚ 30˚ starting point i cam follower roll starting point n double-acting spring...
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Securing the aligned cam disk to additionally prevent the cam disk from being turned, drill a bore into the adapter (36) or the coupling (44) and install a 2 mm dowel pin. Four bore holes are located centrically around the center bore hole on the cam disk. Select a suitable bore to install the pin. ...
Page 26: Double-Acting Actuators
2.3.4 reversing amplifier for double-acting actuators for the use with double-acting actuators, the positioner must be fitted with a reversing amplifier, e.G. The samson type 3710 re- versing amplifier (see mounting and oper- ating instructions eb 8392 en). The output signal pressure of the position...
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Eb 8355-2 en 27 attachment to control valve from the positioner control signals to the actuator 1 reversing amplifier 1.1 special screws 1.2 gasket 1.3 special nuts 1.4 rubber seal 1.5 sealing plug 1.6 filter fig. 11 · mounting a reversing amplifier (1079-1118 or 1079-1119).
Page 28: Connections
3 connections 3.1 pneumatic connections the pneumatic connections are designed as tapped holes with ¼ npt or g ¼ thread. The conventional male connections for metal and copper pipes (or plastic hoses) can be used. Note: the supply air must be dry and free of any oil and dust. Always observe the main...
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Actuator stem retracts (fe): fail-safe position "valve open" (for globe and angle valves) the required supply pressure for a tight-closing valve is roughly estimated from the maximum signal pressure pst max : pst max = f + d p 4 a 2 × × × p d [bar] d = seat diameter [cm] d p = differential pressure ...
Page 30: 3.2 Electrical Connections
3.2 electrical connections danger! Risk of electric shock and/or the formation of an explosive atmo- sphere! – for electrical installation, observe the rel- evant electrotechnical regulations and the accident prevention regulations that apply in the country of use. – the following regulations apply ...
Page 31: 3.2.1 Switching Amplifiers
The wiring for the reference variable is led to the terminals 11 and 12. The positioner does not have to be con- nected to a bonding conductor. If need be, the bonding conductor can be connected ei- ther inside or outside of the housing. Depending on the version used, the positioner is equipped with...
Page 32: Operation
4 operation 4.1 adjusting the positioner at the valve starting point and reference variable when adjusting the positioner directly at the control valve, the travel (opening angle) must be adapted to the reference variable. With a reference variable, for example, 4 to 20 ma, the valve must pass throu...
Page 33: Band Xp and Air Delivery Q
Note: when the positioner is controlled by a computer whose signal is limited, e.G. Be- tween 4 to 20 ma, set the positioner to the range from 4.5 to 20 ma. This is the only way to ensure that the actua- tor is completely vented and the valve com- pletely closed when the controller issues a 4 ma sig...
Page 34: "actuator Stem Retracts"
When the input signal is 4 ma and the op- erating direction >>, or the input signal is 20 ma and the operating direction , the pressure gauge must indicate 0 bar. Correct zero accordingly! 4.1.3 adjusting the actuator: "actuator stem retracts" note: when using an actuator with fail-safe action "actu...
Page 35: 4.2 Changing The Operating
4.2 changing the operating direction if you want to change the operating direc- tion of directly attached positioners (fig. 3) after they have been installed, turn the turnboard (7) and change the position of the connection block, the positioner, and the clamp (1.2). For attachment according to iec ...
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4.3 adjusting the limit switches the positioner version with inductive limit switches has two adjustable tags mounted on a rotary axis which operate the associ- ated proximity switches (50). To operate the inductive limit switches, con- nect the corresponding switching amplifiers in the output circu...
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Setting the switching point move the valve to the switching position 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 ensure safe switching under any condition, the switching point is to be adjusted...
Page 38: 4.4 Adjusting The Position
4.4 adjusting the position transmitter note: the starting point (zero) and upper range value (span) must be set before cali- brating the position transmitter. Depending on the position of the 4-pin plug (symbol on plug: >> or ), the feedback signal can be set to either a range of 4 to 20 ma or 20 to...
Page 39
Adjusting the zero point 1. Use the input signal of the positioner to move the valve to closed position (valve closed – travel 0 %). 2. The ammeter must now indicate approx. 4 ma. 3. Correct smaller deviations on the zero potentiometer until the meter shows ex- actly 4 ma. If deviations are too high...
Page 40: Converting and Retrofitting
5 converting and retrofitting the positioner read instructions in section 6 for explo- sion-protected versions! 5.1 converting from electropneu- matic to pneumatic the electropneumatic positioner can be con- verted into a type 3766 pneumatic positioner with the following conversion kit: m20 x 1.5, o...
Page 41: 5.2 Fitting Limit Switches
5.2 fitting limit switches accessories: limit switch retrofit kit depend- ing on model index 3767-xxxxxxxxxx.04 order no. 1400-8810 for index .06 or higher order no.1400-7573 for index .04/.05 order no.1400-6389 for index .03 1. Unscrew the bracket with plate (1). 2. Remove the screws (2) and replac...
Page 42: Versions
5. Insert the panel (9) at the rear of the positioner and attach it to the input unit using two screws. 6. Guide the connecting cable down behind the mounted panel of the input unit and up again to terminals 81/82 and fasten (brown = +, blue = –). 7. Screw the bracket with plate (1) back on. 8. Scre...
Page 43: Dimensions In Mm
7 dimensions in mm dimensions in mm 44 19.5 35 39 164 46 76 50 36 n1=113 n2=200 58 56 68 28 14 29 150 164 19.5 37 68 185 76 Ø110 82 56 66 50 m20 x 1.5 28.5 28.5 output 1 (a1) output 2 (a2) supply (z) 50 output (38) supply (9) input signal pneumatic connections g ¼ or ¼ npt attachment with intermedia...
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Samson ag · mess- und regeltechnik weismüllerstraße 3 · 60314 frankfurt am main · germany phone: +49 69 4009-0 · fax: +49 69 4009-1507 internet: http://www.Samson.De eb 8355-2 en s/ z 2011-11.