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Samson 2780-1, Mounting And Operating Instructions, Page: 14 / 52

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Samson 2780-1 Mounting And Operating Instructions Download Page 14

3-2 

 

EB 5840 EN

Design and principle of operation

A42

A53

A38 A39

A48

A40

A23

A1

A25

A20

S

FE

S

FA

Actuator stem extends

Actuator stem retracts

Fig. 3-1: 

Type 2780‑1

Actuator stem extends

Actuator stem retracts

A46

A5

A2

S

FA

S

FE

A23

A25-29

A48

A8

A53

A38

A39

Switchover/

 

connecting plate:

A1

Actuator stem

A2

Lower actuator section

A5

Actuator stem

A8

Diaphragm case

A20

Vent plug

A23

Coupling nut

A25‑

29

Compression spring

A38 Metal plate

A39

Diaphragm plate

A40 Bottom diaphragm case
A42 Top diaphragm case
A46 Stop bushing
A48 Diaphragm

A53 Collar nut

S

FA

Signal pressure connection 

(actuator stem extends)

S

FE

Signal pressure connection 

(actuator stem retracts)

Fig. 3-2: 

Type 2780‑2

Summary of Contents for 2780-1

Page 1: ...Translation of original instructions EB 5840 EN Type 2780 1 and Type 2780 2 Pneumatic Actuators Actuator area 120 cm Edition July 2019 Type 2780 1 Type 2780 2...

Page 2: ...fter sales Service Department aftersalesservice samson de The mounting and operating instructions for the devices are included in the scope of delivery The latest documentation is available on our web...

Page 3: ...with direction of action actuator stem retracts 3 4 3 4 Accessories 3 4 3 5 Technical data 3 4 4 Shipment and on site transport 4 1 4 1 Accepting the delivered goods 4 1 4 2 Removing the packaging fro...

Page 4: ...5 Conversion work 8 5 8 5 1 Reversing the direction of action fail safe action 8 5 8 6 Ordering spare parts and operating supplies 8 6 9 Decommissioning 9 1 10 Removal 10 1 10 1 Removing the actuator...

Page 5: ...by external forces or any other external factors Refer to the technical data and nameplate for limits and fields of application as well as possible uses Reasonably foreseeable misuse The actuator is n...

Page 6: ...operating personnel must prevent hazards that could be caused in the actuator by the process medium stored spring energy or by moving parts by taking appropriate precautions They must observe all haz...

Page 7: ...esult they do not fall within the scope of Di rective 2014 34 EU For connection to the equipotential bonding system observe the requirements specified in section 6 4 of EN 60079 14 VDE 0165 Part 1 Ref...

Page 8: ...e hands or fingers if inserted into the actuator Do not touch the actuator stem or insert hands or finger into the yoke or beneath the actuator stem while the air supply is connected to the actuator W...

Page 9: ...sion to be relieved evenly when disassembling the actuator Before starting any work on the actuator relieve the compression from the preload ed springs See Relieving the spring compression in the actu...

Page 10: ...icker Parts that are not tightened far enough may loosen Observe the specified tightening torques u AB 0100 Risk of actuator damage due to the use of unsuitable tools Certain tools are required to wor...

Page 11: ...pressure pmax 5 Bench range in bar 6 Bench range in psi 7 Operating travel in mm 8 Symbol for manual override 9 Symbol indicating fail safe action Actuator stem extends FA Actuator stem retracts FE 10...

Page 12: ...2 2 EB 5840 EN...

Page 13: ...f action actuator stem re tracts the compressed air is applied to the signal pressure connection on the top dia phragm case The actuator s direction of action can be re versed see the Operation sectio...

Page 14: ...8 A8 A53 A38 A39 Switchover connecting plate A1 Actuator stem A2 Lower actuator section A5 Actuator stem A8 Diaphragm case A20 Vent plug A23 Coupling nut A25 29 Compression spring A38 Metal plate A39...

Page 15: ...ve depends on whether the springs are installed in the top or bottom di aphragm chamber The listed fail safe actions apply to SAMSON globe valves Note Actuator stem extends Left attachment Right attac...

Page 16: ...in dex Order no Switchover plate New 01 1400 6822 Old 00 1400 6819 Connect ing plate New 01 1400 6823 G thread 00 1400 6820 NPT thread 00 1400 6821 Actuators with device index 01 are equipped with ne...

Page 17: ...8 84 M32 x 1 5 M32 x 1 5 50 5 50 5 73 5 Fig 3 4 Dimensional drawings Compliance The Type 2780 1 and Type 2780 2 Pneu matic Actuators bear the EAC mark of con formity Dimensions Dimensions see Fig 3 4...

Page 18: ...3 6 EB 5840 EN...

Page 19: ...on 4 2 Removing the packaging from the actuator Observe the following sequence Do not open or remove the packaging until immediately before mounting the actuator Dispose and recycle the packaging in a...

Page 20: ...riods of time a Lifting the actuator without valve 1 Carefully lift the actuator If necessary check whether the lifting equipment and accessories can bear the weight 2 Move the actuator at an even pac...

Page 21: ...ake sure that the ambient air is free of acids or other corrosive media Observe permissible temperatures see Technical data in the Design and prin ciple of operation section Do not place any objects o...

Page 22: ...4 4 EB 5840 EN...

Page 23: ...ely and must be assembled on site Proceed as follows to mount the actuator and prepare the start up Risk of personal injury due to exhaust air being vented The actuator is operated with air As a resul...

Page 24: ...oceed as follows if the valve and actuator have not been assembled by SAMSON The valve and actuator are assembled with special attention paid to the actuator s bench range and direction of action Thes...

Page 25: ...he connecting plate is correctly inserted The connecting plate has threaded holes with NPT and G threads The signal pres sure connection that is not used is sealed with the rubber seal and square plug...

Page 26: ...15 20 1 A40 A1 A23 12 1 Guide nipple 3 Housing 5 Seat 12 Nut 15 Plug stem 20 Compression spring 32 Plug A1 Actuator stem A23 Coupling nut A40 Bottom diaphragm case Vent plug Fig 5 1 Type 2780 1 Pneuma...

Page 27: ...the actuator Before working on the actuator discon nect and lock the pneumatic air supply as well as the control signal Do not impede the movement of the actu ator stem by inserting objects into the y...

Page 28: ...oop operation The Type 2780 Pneumatic Actuator is de signed for a maximum supply pressure of 4 bar Only apply the signal pressure to the dia phragm chamber of the actuator that does not contain any sp...

Page 29: ...rgy in the actuator e g spring compression See Relieving the spring com pression in the actuator in the Removal section Insufficient signal pressure Check the signal pressure Check the signal pressure...

Page 30: ...7 2 EB 5840 EN Malfunctions 7 2 Emergency action The plant operator is responsible for emer gency action to be taken in the plant...

Page 31: ...ottom dia phragm case They allow the spring com pression to be relieved evenly on disassem bling the actuator Only open the actuator following the in structions in this document See Reliev ing the spr...

Page 32: ...aring out quicker Parts that are not tightened far enough may loosen Observe the specified tightening torques u AB 0100 Risk of actuator damage due to the use of unsuitable tools Only use tools approv...

Page 33: ...rvicing and or conversion work can be performed after preparation is completed Replace the diaphragm see sec tion 8 4 1 Reverse the direction of action see sec tion 8 5 1 8 3 Mounting the actuator on...

Page 34: ...4 Place a new diaphragm on the metal plate A38 Place on the diaphragm plate A39 5 Check the sealing element on the collar nut A53 If necessary renew it 6 Apply a suitable sealant and lubricant to the...

Page 35: ...ove the diaphragm plate A39 to gether with the diaphragm A48 and metal plate A38 from the actuator stem A1 and place them back on again turned over 5 Tighten the collar nut A53 6 Apply a suitable seal...

Page 36: ...om diaphragm case A40 9 Place the springs A25 in the bottom di aphragm case A40 centering them in the intended recesses 10 Place on the top diaphragm case A42 11 Fasten the top and bottom diaphragm ca...

Page 37: ...spring compression in the actua tor in the Removal section Risk of personal injury due to exhaust air being vented The actuator is operated with air As a result air is vented during operation Wear ey...

Page 38: ...9 2 EB 5840 EN...

Page 39: ...n this document See Reliev ing the spring compression in the actua tor in the Removal section Risk of personal injury due to exhaust air being vented The actuator is operated with air As a result air...

Page 40: ...ve 2 Loosen the coupling nut A23 on the actuator stem A1 and plug stem 15 3 Disconnect the signal pressure again 4 Lift the actuator off the valve 5 Slide the coupling nut A23 onto the actuator stem A...

Page 41: ...Support After Sales Service 2 Send an e mail u retouren samson de to register the return shipment including the following information Type Article no Configuration ID Original order Completed Declarat...

Page 42: ...11 2 EB 5840 EN...

Page 43: ...EB 5840 EN 12 1 Disposal 12 Disposal Observe local national and internation al refuse regulations Do not dispose of components lubricants and hazardous substances together with your household waste...

Page 44: ...12 2 EB 5840 EN...

Page 45: ...5 Actuator stem 8 Top diaphragm case 9 Bushing 10 Bushing 20 Vent plug 23 Coupling nut 25 29 Compression spring 37 Threaded bushing 38 Metal plate 39 Diaphragm plate 40 Bottom diaphragm case 42 Top di...

Page 46: ...13 2 EB 5840 EN 51 54 52 42 53 38 39 48 40 46 23 1 9 55 25 20 59 65 Type 2780 1 Actuator...

Page 47: ...EB 5840 EN 13 3 51 54 52 45 25 29 53 38 57 58 2 37 23 10 55 5 46 48 45 8 39 59 65 Type 2780 2 Actuator...

Page 48: ...bsid iaries The addresses of SAMSON AG its subsid iaries representatives and service facilities worldwide can be found on our website www samson de or in all SAMSON prod uct catalogs Required specific...

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Page 52: ...2019 07 24 English SAMSON AKTIENGESELLSCHAFT Weism llerstra e 3 60314 Frankfurt am Main Germany Phone 49 69 4009 0 Fax 49 69 4009 1507 samson samson de www samson de EB 5840 EN...

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