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Fig. 2

⋅

Functional diagram and inside view

8 9

6.1

6.2

2.1

2.2

1.1

1.2

Supply
9

Travel

4 3 7 8 9 11

6.1 6.2

6.1 Span adjuster

6.2 Zero adjuster

Tu rnboard

X restriction

Pressu re regu lator

10 Booster

11 Volume restriction

12 Solenoid valve (optional)

Pick-u p lever

1.1 Pin

1.2 Clamp

2.1 Nozzle >>

2.2 Nozzle <>

Diaphragm lever

Range spring

Measuring diaphragm

EB 8355-1 EN

Design and principle of operation

Содержание Type 3766

Страница 1: ...Pneumatic Positioner Type 3766 Mounting and Operating Instructions EB 8355 1 EN Edition September 2009 Fig 1 Type 3766...

Страница 2: ...g amplifier for double acting actuators 26 3 Connections 28 3 1 Pneumatic connections 28 3 1 1 Pressure gauge 28 3 1 2 Supply pressure 28 3 2 Electrical connections 29 3 2 1 Switching amplifiers 30 4...

Страница 3: ...experience as well as their knowledge of the applicable standards Explosion protected versions of this positioner may only be operated by per sonnel who have undergone special training or instructions...

Страница 4: ...er 10 and the pressure regulator 9 The controlled supply air flows through the Xp restric tion 8 and the nozzle 2 1 2 2 against the diaphragm lever flapper plate Any change of the reference variable o...

Страница 5: ...3 7 8 9 11 6 1 6 2 6 1 Span adjuster 6 2 Zero adjuster 7 Turnboard 8 X restriction 9 Pressure regulator 10 Booster 11 Volume restriction 12 Solenoid valve optional 1 Pick up lever 1 1 Pin 1 2 Clamp 2...

Страница 6: ...ected relationship between valve posi tion i e valve travel and a controller out put current signal of 4 to 20 mA The position transmitter setting allows both valve end positions valve CLOSED or valve...

Страница 7: ...enoid valve Without 0 6 V DC 2 12 V DC 3 24 V DC 4 Pneumatic connections NPT 1 ISO 228 1 G 2 Electrical connections Without without additional equipment or solenoid valve 0 0 0 0 Cable gland M20 x 1 5...

Страница 8: ...ivery Filling the actuator 3 0 m h Venting the actuator 4 5 m h 8 5 m h 14 0 m h Permissible ambient temperature 20 C to 80 C with plastic cable gland 40 C to 80 C with metal cable gland special versi...

Страница 9: ...ally safe output current circuit Output signal Two wire system 4 to 20 mA reversible operating direction Permissible load U 12 V R 20 mA Power supply Voltage range 12 to 45 V DC Only with intrinsicall...

Страница 10: ...ction causes the signal pressure to decrease reverse ac tion causes the signal pressure to in crease On the turnboard 7 the operating direc tion is indicated by symbols direct reverse Depending on the...

Страница 11: ...m retracts Operating direction Attachm left Attachm right Internal signal pressure connection Op direction Attachment right Op direction Attachment left Actuator stem extends Op direction Attachment l...

Страница 12: ...points to the marking 8 Place the connection block with its seal ing rings on the positioner and the actu ator yoke and screw tight using the fastening screw Actuators with Actua tor stem retracts re...

Страница 13: ...d the lateral cover of the actuator must be mounted such that the vent plug points downward Fig 4 Mounting the clamp 1 2 D2 D1 15 Vent plug Attachment left Attachment right Looking onto the signal pre...

Страница 14: ...ction block required for 240 350 and 700 cm actuators including seals and fastening screw G 1 4 1400 8811 1 4 NPT 1400 8812 Table 3 Actuator size in cm Material Order no Required tube connection inclu...

Страница 15: ...the right of the control valve Figs 6 and 7 Turn the positioner at the adapter housing by 180 to set or change the opera ting direction of the positioner control valve unit Fig 5 Fixing the spring on...

Страница 16: ...r 2 as in Table 6 5 Clamp the clip 21 onto the lever 18 If the positioner is attached with its air connection pointing to the front Fig 6 the clip must be clamped onto the lever 18 with the open side...

Страница 17: ...b 27a Attachment to NAMUR rib Mounting position Attachment to rods 18 Lever N1 N2 19 Pin 20 Plate 21 Clip 22 Clamping plate 23 Screw 24 Pointer 25 Shaft 26 Lever of the positioner 27a Pin 27b Lock nut...

Страница 18: ...coils default according to Table 6 Range spring 2 4 5 coils 1400 6442 1400 6443 Accessories Pressure gauge build on block G 1 4 1400 7458 1 4 NPT 1400 7459 Pressure gauge kit SS Br 1400 6950 SS SS 14...

Страница 19: ...actuators Threaded connection G 1079 1118 Threaded connection NPT 1079 1119 Cam disk with accessories Linearizes the characteristic Creates an equal percentage characteristic Depends on opening angle...

Страница 20: ...roll 35 on the side of the feedback lever 37 opposite the insert nuts Fasten with the supplied screws 38 and washers Important To ensure a close physical contact between the cam follower roll and the...

Страница 21: ...Attachment acc to VDI VDE 3845 Attachment to SAMSON Type 3278 33 Positioner 34 Intermediate piece 35 Lever with cam follower roll 36 Adapter 37 Feedback lever 38 Screws 39 Scale 40 Cam disk 41 Actuat...

Страница 22: ...or closes when the refer ence variable increases direct or reverse Each cam disk carries two cam sections whose starting points are indicated by small bores Depending on the operating direc tion of th...

Страница 23: ...ef variable Sign press Valve Characteristic Ref variable Sign press Valve Characteristic Increases Increases Opens N Decreases Increases Opens I Fail safe position valve OPEN without supply pressure D...

Страница 24: ...ses A1 up A2 down Opens N Decreases A1up A2 down Opens I When looking onto the actuator shaft from the positioner Valve opens clockwise Starting position valve CLOSED Direct operating direction Revers...

Страница 25: ...eing turned drill a bore into the adapt er 36 or the stem connector 44 and in stall a 2 mm dowel pin Four bore holes are located centrically around the center bore hole on the cam disk Select a suitab...

Страница 26: ...3 1 2 Assembly Important Remove the sealing plug 1 5 before install ing the reversing amplifier The rubber seal 1 4 must remain installed 1 Screw the special nuts 1 3 included in the accessories of th...

Страница 27: ...9 A1 1 5 1 6 Z A2 1 4 A1 A2 Output 38 Supply 9 1 3 1 2 1 1 1 6 Z A1 1 Reversing amplifier 1 1 Special screws 1 2 Gasket 1 3 Special nuts 1 4 Rubber seal 1 5 Sealing plug From the positioner To the act...

Страница 28: ...t positioner attachment the vent plug is located on the plastic cover of the ac tuator for NAMUR attachment it is located on the adapter housing and for attachment to rotary actuators the vent plug ca...

Страница 29: ...quired to observe the relevant elec trotechnical regulations and the acci dent prevention regulations that apply in the country of use In Ger many these are the VDE regulations and the accident preven...

Страница 30: ...The conductor ends must be protected against unlaying e g by using wire end fer rules Cable entries left unused must be sealed with caps When two separate cables are used for con nection an additiona...

Страница 31: ...eference variable range and thus the upper range value determine the travel of the valve In split range operation Fig 13 bottom the control valves operate on smaller refer ence variables The controlle...

Страница 32: ...er when the reference variable reaches its lower operating direction and upper operating direction value As a result adjust the input signal to a slightly increased starting point of 0 23 bar for dire...

Страница 33: ...uster 6 2 until the valve just starts to move from its initial position 3 Increase the input signal and slowly re duce it to 1 bar again Check whether the valve start to move at exactly 1 bar 4 Correc...

Страница 34: ...Fig 3 after they have been installed turn the turn board 7 and change the position of the connection block of the positioner and of the clamp 1 2 For attachment according to IEC 60534 6 NAMUR turn the...

Страница 35: ...e end positions of the control valve valve OPEN or CLOSED depending on the opera ting direction and the mounting position ac cording to Tables 8 and 9 The terminals 41 42 and 51 52 can option ally be...

Страница 36: ...is reached Table 8 Direct attachment to Type 3277 Actuator Fig 3 Attachment left Attachment right Switch Valve position Tag OUT Tag IN Tag OUT Tag IN CLOSED B A A B OPEN A B B A Table 9 NAMUR attachm...

Страница 37: ...or fine tuning The adjusted value always refers to 20 mA Example Move the valve to open position while ob serving the position transmitter signal If the signal does not move in the desired di rection...

Страница 38: ...SPAN potentiometer until the meter shows exactly 20 mA Since zero and span have a mutual in fluence on each other repeat the correc tion procedure at both potentiometers until both values are correct...

Страница 39: ...cables with terminal screws 4 Check that the sealing hoses 7 8 are properly inserted on the bottom section of the i p module When the module is installed broken line in Fig 16 the sealing hose includi...

Страница 40: ...put 2 A2 Supply Z 50 Output 38 Supply 9 Input signal Reversing amplifier optional Fulcrum of the actuator shaft Direct attachment Pneum connection of the reversing amplifier Pneumatic connections G 1...

Страница 41: ...EB 8355 1 EN 41...

Страница 42: ...42 EB 8355 1 EN...

Страница 43: ...EB 8355 1 EN 43...

Страница 44: ...44 EB 8355 1 EN...

Страница 45: ...EB 8355 1 EN 45...

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Страница 51: ...EB 8355 1 EN 51...

Страница 52: ...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 8355 1 EN S Z 2009 09...

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