Samson 3371 Series Mounting And Operating Instructions

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Page 1

Type3371 Pneumatic Actuator

Actuator area: 120 and 350cm²

Translation of original instructions

Type3371 with 120cm² actuator area Type3371 with 350cm² actuator area

Mounting and Operating Instructions

EB 8317 EN

Edition November 2016

Page 2

Note on these mounting and operating instructions

These mounting and operating instructions assist you in mounting and operating the device safely. The instructions are binding for handling SAMSON devices.

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. The latest documentation is available on our website (www.samson.de) > Product documentation. You can enter the document number or type number in the [Find:] eld to look for a document.

Denition of signal words

DANGER

Hazardous situations which, if not avoided, will result in death or serious injury

WARNING

Hazardous situations which, if not avoided, could result in death or serious injury

2 EB 8317 EN

NOTICE

Property damage message or malfunction

Note

Additional information

Tip

Recommended action

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Contents

1 Safety instructions and measures ...................................................................5

1.1 Notes on possible severe personal injury .........................................................7

1.2 Notes on possible personal injury ...................................................................7

1.3 Notes on possible property damage ................................................................8

2 Markings on the device ...............................................................................10

2.1 Actuator nameplate ......................................................................................10

3 Design and principle of operation ................................................................12

3.1 Direction of action ........................................................................................12

3.2 Signal pressure routing .................................................................................12

3.3 Fail-safe action ............................................................................................15

3.3.1 Version with direction of action "actuator stem extends" (FA) ...........................15

3.3.2 Version with direction of action "actuator stem retracts" (FE) ............................15

3.4 Mounting types ............................................................................................15

3.5 Versions ......................................................................................................17

3.6 Technical data .............................................................................................17

4 Measures for preparation ............................................................................19

4.1 Unpacking ..................................................................................................19

4.2 Transporting and lifting ................................................................................19

4.2.1 Transporting ................................................................................................19

4.2.2 Lifting ..........................................................................................................19

4.3 Storage .......................................................................................................19

4.4 Preparation for installation ............................................................................21

5 Mounting and start-up .................................................................................22

5.1 Mounting the actuator onto the valve .............................................................22

5.1.1 120cm² version ..........................................................................................24

5.1.2 350cm² version ..........................................................................................26

5.2 Changing the mounting type .........................................................................27

5.2.1 Changing the mounting type to mounting using rods (FormB to FormC) ..........27

5.2.2 Changing the mounting type to mounting using a crossbeam

(FormC to FormB) .......................................................................................28

5.3 Preloading the springs ..................................................................................28

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Contents

5.3.1 Increasing the actuator thrust ........................................................................29

5.3.2 Adapting the travel range .............................................................................29

5.4 Additional ttings .........................................................................................30

6 Operation ...................................................................................................31

6.1 On/off service .............................................................................................31

6.2 Reversal of the direction of action ..................................................................31

6.2.1 120cm² version ..........................................................................................32

6.2.2 350cm² version ..........................................................................................34

6.3 Version with travel stop .................................................................................36

6.3.1 Bottom travel stop (minimum travel) ...............................................................36

6.3.2 Top travel stop (maximum travel) ...................................................................37

6.4 Version with handwheel ................................................................................37

6.4.1 Operating the handwheel of version with "stem extends" direction of action .....37

6.4.2 Operating the handwheel of version with "stem retracts" direction of action ......37

7 Servicing.....................................................................................................38

7.1 Replacing the diaphragm .............................................................................39

7.1.1 120cm² version ..........................................................................................39

7.1.2 350cm² version ..........................................................................................41

7.2 Preparation for return shipment .....................................................................44

7.3 Ordering spare parts and operating supplies .................................................44

8 Malfunctions ...............................................................................................45

9 Decommissioning and disassembly ..............................................................46

9.1 Decommissioning .........................................................................................46

9.2 Removing the actuator from the valve ............................................................46

9.2.1 120cm² version ..........................................................................................46

9.2.2 350cm² version ..........................................................................................47

9.3 Relieving the spring compression in the actuator .............................................47

9.4 Disposal ......................................................................................................47

10 Annex.........................................................................................................48

10.1 After-sales service ........................................................................................48

10.2 Spare parts .................................................................................................49

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Safety instructions and measures

1 Safety instructions and measures

Intended use

The SAMSON Type3371 Actuator is designed for operating a mounted globe valve. In combination with the valve, the actuator is used to shut off the ow of liquids, gases or vapors in the pipeline. The actuator is suitable for on/off service. The actuator can be used in processing and industrial plants.

The actuator is designed to operate under exactly dened conditions (e.g. thrust, travel). Therefore, operators must ensure that the actuator is only used in applications that meet the specications used for sizing the actuator at the ordering stage. In case operators intend to use the actuator in other applications or conditions than specied, contact SAMSON.

SAMSON does not assume any liability for damage resulting from the failure to use the device for its intended purpose or for damage caused by external forces or any other external factors.

Î Refer to the technical data and nameplate for limits and elds of application as well as

possible uses.

Reasonably foreseeable misuse

The actuator is not suitable for the following applications:

− Use outside the limits dened during sizing and in the technical data

− Use outside the limits dened by the accessories mounted on the actuator

Furthermore, the following activities do not comply with the intended use:

− Use of non-original spare parts

− Performing service and repair work not described in these instructions

Qualications of operating personnel

The actuator must be mounted, started up, serviced, and repaired by fully trained and qualied personnel only; the accepted industry codes and practices are to be observed. According to these mounting and operating instructions, trained personnel refers to individuals who are able to judge the work they are assigned to and recognize possible hazards due to their specialized training, their knowledge and experience as well as their knowledge of the applicable standards.

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Safety instructions and measures

Personal protective equipment

We recommend wearing the following personal protective equipment when handling the Type3371 Pneumatic Actuator:

− Protective gloves when mounting or removing the actuator Î Check with the plant operator for details on further protective equipment.

Revisions and other modications

Revisions, conversions or other modications to the product are not authorized by SAMSON. They are performed at the user's own risk and may lead to safety hazards, for example. Furthermore, the product may no longer meet the requirements for its intended use.

Safety devices

The Type3371 Actuator does not have any special safety equipment.

Warning against residual hazards

To avoid personal injury or property damage, plant operators and operating personnel must prevent hazards that could be caused in the actuator by the process medium, the operating pressure, the signal pressure or by moving parts by taking appropriate precautions. They must observe all hazard statements, warning and caution notes in these mounting and operating instructions, especially for installation, start-up, and service work.

Responsibilities of the operator

The operator is responsible for proper operation and compliance with the safety regulations. Operators are obliged to provide these mounting and operating instructions as well as the referenced documents to the operating personnel and to instruct them in proper operation. Furthermore, the operator must ensure that operating personnel or third persons are not exposed to any danger.

Responsibilities of operating personnel

Operating personnel must read and understand these mounting and operating instructions as well as the referenced documents and observe the hazard statements, warning and caution notes specied in them. Furthermore, the operating personnel must be familiar with the applicable health, safety and accident prevention regulations and comply with them.

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Safety instructions and measures

Referenced standards and regulations

According to the ignition risk assessment performed in accordance with EN13463-1:2009, section 5.2, the non-electrical actuators do not have their own potential ignition source even in the rare incident of an operating fault. As a result, they do not fall within the scope of Directive 2014/34/EU.

Î For connection to the equipotential bonding system, observe the requirements specied in

section 6.4 of EN60079-14 (VDE0165 Part 1).

Referenced documentation

The following documents apply in addition to these mounting and operating instructions:

− Mounting and operating instructions for the mounted valve e.g. uEB8111 for SAMSON Type3321 Valve

− Mounting and operating instructions for mounted valve accessories (positioner, solenoid valve etc.)

− uAB0100 for tools, tightening torques, and lubricant

1.1 Notes on possible severe personal injury

DANGER

Risk of bursting in the actuator.

Actuators are pressurized. Improper opening can lead to actuator components bursting.

Î Before starting any work on the actuator, depressurize all plant sections con-

cerned and the actuator.

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Safety instructions and measures

1.2 Notes on possible personal injury

WARNING

Crush hazard arising from moving parts.

The actuator contains moving parts (actuator stem), which can injure hands or ngers if inserted into the actuator.

Î Do not insert hands or ngers into the yoke while the valve is in operation. Î While working on the actuator, disconnect and lock the pneumatic air supply as well

as the control signal.

Risk of personal injury due to preloaded springs.

Actuators with preloaded springs are under tension. They can be identied by the long bolts protruding from the bottom of the actuator.

Î Before starting any work on the actuator, relieve the compression from the preload-

ed springs (see section9.3).

Risk of personal injury when the actuator vents.

While the valve is operating, the actuator may vent when the valve opens or closes.

Î Install the control valve in such a way that the actuator does not vent at eye level. Î Use suitable silencers and vent plugs. Î Wear eye protection when working in close proximity to the control valve.

Damage to health relating to the REACH regulation.

If a SAMSON device contains a substance which is listed as being a substance of very high concern on the candidate list of the REACH regulation, this circumstance is indicated on the SAMSON delivery note.

Î Information on safe use of the part affected, see

uhttp://www.samson.de/reach-en.html.

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Safety instructions and measures

1.3 Notes on possible property damage

NOTICE

Risk of actuator damage due to excessively high or low tightening torques.

Observe the specied torques on tightening actuator components. Excessively tightened torques lead to parts wearing out quicker. Parts that are not tightened far enough may loosen.

Î Observe the specied tightening torques (uAB0100).

Risk of actuator damage due to the use of unsuitable tools.

Certain tools are required to work on the actuator.

Î Only use tools approved by SAMSON (uAB0100).

Risk of actuator damage due to the use of unsuitable lubricants.

The lubricants to be used depend on the actuator material. Unsuitable lubricants may corrode and damage the valve surface.

Î Only use lubricants approved by SAMSON (uAB0100).

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Markings on the device

SAMSON 3371

2 Markings on the device

2.1 Actuator nameplate

The nameplate is stuck on the diaphragm casing (see Fig.1). The nameplate of the Type3371 with 120cm² actuator area is located on the bottom diaphragm case. The nameplate of the Type3371 with 350cm² actuator area is located on the top diaphragm case.

Nameplate

It includes all details required to identify the device (see Fig.2):

1 Type designation 2 Conguration ID 3 Serial number 4 Permissible supply pressure p

max

bar/psi 5 Bench range in bar 6 Bench range in psi 7 Operating travel in mm 8 Symbol indicating fail-safe action

Actuator stem extends (FA)

Actuator stem retracts (FE)

9 Date of manufacture (month and year)

Fig.1: Location of nameplate

5 6

See technical data for ambient temperature

Model Var.-ID Serial no. Air supply max.

SAMSON AG D-60314 Frankfurt Made in Germany

Fig.2: Example for nameplate

Pneumatic Actuator 120 cm²

1 2 3

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EB 8317 EN 11

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Design and principle of operation

3 Design and principle of oper-

ation

The Type3371 Pneumatic Actuators have an actuator area of either 120 or 350cm². They are mainly used for attachment to Series V2001 Valves:

− Type 3321 Globe Valve

− Type3323 Three-way Valve

− Type3531 Globe Valve for Heat Transfer

Oil

− Type3535 Three-way Valve for Heat Transfer Oil

Table1 provides an overview of the possible combinations and how the actuator is mounted on the valve.

The pneumatic actuators mainly consist of two diaphragm cases, a diaphragm, and internal springs. The actuator is connected to the valve bonnet using a rod-type yoke. The stem connector clamps connect the actuator stem with the plug stem of the valve.

The signal pressure p

· A at the diaphragm surface A, which is

opposed by the springs in the actuator. The bench range is determined by the number of springs used and their compression, taking into account the rated travel. The travel is proportional to the signal pressure p

creates the force F =

tion on the top diaphragm case. With direction of action "actuator stem extends", the compressed air is applied to the signal pressure connection on the bottom diaphragm case.

The actuator's direction of action can be reversed (see section6.2).

3.2 Signal pressure routing

120cm² version (see Fig.3)

In the "actuator stem extends" version, the signal pressure is routed through the bottom signal pressure connection (A35) to the bottom diaphragm chamber and moves the actuator stem (A3) upward opposing the spring force.

In the "actuator stem retracts" version, the signal pressure is routed through the top signal pressure connection to the top diaphragm chamber and moves the actuator stem (A3) downward opposing the spring force.

3.1 Direction of action

The direction of action is determined by how the springs and diaphragm plate are arranged in the actuator. With direction of action "actuator stem retracts", the compressed air is applied to the signal pressure connec-

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Design and principle of operation

A31

•

A26 A10

A18

A13

A14

A11

A35

Mounting with crossbeam Mounting without crossbeam

A16

•

• A1

•

A1 Vent plug A2 Bottom diaphragm case A3 Actuator stem A10 Spring A11 Rod A12 Bushing A13 Diaphragm plate A14 Diaphragm plate

Fig.3: Functional diagram of Type3371 Actuator with 120cm² actuator area

•

A30

•

A17

•

A16 Top diaphragm case A17 Crossbeam A18 Diaphragm A26 Collar nut A30/

Stem connector clamps

A31 A35 Pneumatic connection A72 Rod nut

•

A12

•

A72

EB 8317 EN 13

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Design and principle of operation

A61

A10

A15

A51

A50

A25

A20

A21

A27

A5 A4

A33

A1 Top diaphragm case A2 Bottom diaphragm case A4 Diaphragm A5 Diaphragm plate A7 Actuator stem A10 Spring A15 Collar nut A20 Hexagon bolt

•

A40

A42

A41

•

A21 Hexagon nut A25 Washer A27 Compressor A33 Rod A40 Radial shaft seal A41 Wiper ring A42 Dry bearing A50 Screw for rod (A51)

•

A60

A54

•

A51 Rod A54 Rod nut A60 Plate A61 Pneumatic connection S Signal pressure

connection (stem retracts)

Fig.4: Functional diagram of Type3371 Actuator with 350cm² actuator area

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Design and principle of operation

350cm² version (see Fig.4)

In the "actuator stem extends" version, the signal pressure is routed through the bottom signal pressure connection (S) to the bottom diaphragm chamber and moves the actuator stem (A7) upward opposing the spring force.

In the "actuator stem retracts" version, the signal pressure is routed through the top signal pressure connection (S) to the top diaphragm chamber and moves the actuator stem (A7) downward opposing the spring force.

3.3 Fail-safe action

When the signal pressure is reduced or the control signal fails, the fail-safe position of the control valve depends on whether the springs are installed in the top or bottom diaphragm chamber.

3.3.1 Version with direction of action "actuator stem

extends" (FA)

When the signal pressure is reduced or the control signal fails, the springs move the actuator stem downward and close the globe valve. The valve opens when the signal pressure is increased enough to overcome the spring force.

3.3.2 Version with direction of action "actuator stem

retracts" (FE)

When the signal pressure is reduced or the control signal fails, the springs move the actuator stem upward and open a mounted globe valve. The valve closes when the signal pressure is increased enough to overcome the spring force.

3.4 Mounting types

There are two types of mounting depending on the valve/actuator combination: mounting using a crossbeam or rods (see Table1).

When the actuator is mounted to the valve using a crossbeam (Form B, Fig.5), the actuator is fastened to the valve bonnet using a central nut. When the actuator is mounted using rods (Form C, Fig.6), the actuator is connected to the valve bonnet using rods. In this case, a crossbeam is not required for mounting the actuator. A plate keeps the correct distance between rods.

Both mounting types are described in section5.1.

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Design and principle of operation

Table1: Mounting types (see Fig.5 and Fig.6)

Actuator area 120cm² 350cm²

Travel 15mm 15mm 30mm

Type ... Valve Nominal size DN

3321 15 to 50 FormB – 3321 65 to 100 FormC FormC –

3321 100 – – FormC

3323 15 to 50 FormB – –

3323 65 to 80 – FormC –

3323 100 – – FormC

3531 15 to 80 FormB – –

3535 15 to 80 FormB – –

–

Fig.5: FormB: mounting using crossbeam Fig.6: FormC: mounting using rods

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Design and principle of operation

Ø168

Ø280

3.5 Versions

− Standard version of Type3371

(120cm²)

The housings of Type 3371 Pneumatic Actuators have an actuator area of 120cm² and are made of die-cast aluminum.

− Standard version of Type3371

(350cm²)

The housings of Type3371 Pneumatic Actuators have an actuator area of 350cm² and are made of sheet steel.

− Version with travel stop

The Type3371 Actuators with 120cm² actuator area can be tted with a mechanically adjustable travel stop. The travel is reduced by up to 50% in both directions of action (stem extends or retracts). The travel stop is not available for Type3371 (350cm²).

− Version with handwheel

The Type3371 Actuators (120cm²) can be tted with an additional handwheel. The handwheel is mounted on the top diaphragm case (A1) and is used to adjust the travel manually. The handwheel is not available for Type3371 (350cm²).

3.6 Technical data

The nameplate provides information on the actuator version (see section2.1).

Note

More information is available in Data Sheet

uT8317.

182

Fig.7: Dimensional drawing of 120cm² version Fig.8: Dimensional drawing of 350cm² version

EB 8317 EN 17

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Design and principle of operation

Table2: Technical data for Type3371 Pneumatic Actuator

Actuator area 120cm² 350cm²

Rated travel 15mm 30mm

Stem

Fail-safe action

Bench range in bar

Supply pressure See section6.1 for restrictions

Ambient temperature range

Dimensions Refer to Fig.7 Refer to Fig.8

Approx. weight 3.3kg 15kg

Compliance

Materials

Actuator housing GD-AlSi10Mg 1.0332

Diaphragm NBR NBR

Actuator stem 1.4305 1.4401/1.4404

retracts

(FE)

0.4 to

1.4

Stem

retracts

(FE)

–35 to +90°C –35 to +90°C

extends

1.4 to 2.3

Stem

(FA)

Stem

extends

(FA)

2.1 to

3.3

Stem

retracts

(FE)

1.5 to

2.1

Stem

extends

(FA)

2.1 to

2.7

retracts

Stem

(FE)

1.5 to

2.7

Stem

extends

(FA)

2.2 to

3.8

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Measures for preparation

4 Measures for preparation

After receiving the shipment, proceed as follows:

1. Check the scope of delivery. Compare the shipment received against the delivery note.

2. Check the shipment for transportation damage. Report any damage to SAMSON and the forwarding agent (refer to delivery note).

4.1 Unpacking

Note

Do not remove the packaging until immediately before mounting.

Proceed as follows to lift and mount the actuator:

1. Remove the packaging from the actuator.

2. Dispose of the packaging in accordance with the valid regulations.

4.2.1 Transporting

The actuator can be transported using lifting equipment (e.g. crane or forklift).

Î Leave the actuator in its transport con-

tainer or on the pallet to transport it.

Î Observe the transport instructions.

Transport instructions

− Protect the actuator against external in- uences (e.g. impact).

− Do not damage the corrosion protection (paint, surface coatings). Repair any damage immediately.

− Protect the actuator against moisture and dirt.

− The permissible transportation tempera- ture is between –20 and +65°C.

4.2.2 Lifting

Due to the low service weight, lifting equipment is not required to lift the actuator (e.g. to mount it onto a valve).

4.2 Transporting and lifting

Tip

SAMSON's After-sales Service department can provide more detailed transport and lifting instructions on request.

EB 8317 EN 19

Note

See valve documentation for more information on lifting the entire control valve assembly.

Page 20

Measures for preparation

4.3 Storage

NOTICE

Risk of actuator damage due to improper storage.

− Observe storage instructions.

− Avoid long storage times.

− Contact SAMSON in case of different stor-

age conditions or long storage periods.

Note

We recommend regularly checking the actuator and the prevailing storage conditions during long storage times.

Storage instructions

− When the valve and actuator are al- ready assembled, observe the storage conditions for control valves. See associated valve documentation.

− Protect the actuator against external in- uences (e.g. impact).

− Do not damage the corrosion protection (paint, surface coatings). Repair any damage immediately.

− Protect the actuator against moisture and dirt. Store it at a relative humidity of less than 75%. In damp spaces, prevent condensation. If necessary, use a drying agent or heating.

− Make sure that the ambient air is free of acids or other corrosive media.

− The permissible storage temperature is between –20 and +65°C.

− Do not place any objects on the actuator.

Special storage instructions for elastomers

Elastomer, e.g. actuator diaphragm

− To keep elastomers in shape and to pre- vent cracking, do not bend them or hang them up.

− We recommend a storage temperature of 15°C for elastomers.

− Store elastomers away from lubricants, chemicals, solutions, and fuels.

Tip

SAMSON's After-sales Service department can provide more detailed storage instructions on request.

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4.4 Preparation for installation

Proceed as follows:

Î Check the actuator for damage. Î Check to make sure that the type desig-

nation, material, and temperature range of the actuator match the plant conditions.

Î Check the pressure gauge installed on

valve accessories to make sure it functions.

Î When the valve and actuator are al-

ready assembled, check the tightening torques of the bolted joints (uAB0100). Components may loosen during transport.

Measures for preparation

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Mounting and start-up

5 Mounting and start-up

SAMSON control valves are delivered ready for use. In special cases, the valve and actuator are delivered separately and must be assembled on site. The procedure to mount and start up the actuator are described in following.

NOTICE

Risk of actuator damage due to excessively high or low tightening torques. Observe the specied torques on tightening actuator components. Excessively tightened torques lead to parts wearing out quicker. Parts that are not tightened far enough may loosen. Observe the specied tightening torques (uAB0100).

NOTICE

Risk of actuator damage due to the use of unsuitable tools. Only use tools approved by SAMSON (uAB0100).

5.1 Mounting the actuator onto the valve

Note

− Table1 provides an overview of the possi- ble combinations (FormB and FormC).

− Remove the mounted actuator before mounting another actuator (see section9.2).

− Preloading the actuator springs increases the thrust and reduces the travel range of the actuator (see section5.3).

Tip

The valve and actuator are assembled with special attention paid to the actuator's bench range and direction of action. These details are specied on the actuator nameplate (see section2.1).

Note

See associated valve documentation for additional mounting instructions.

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Page 23

Mounting and start-up

A26 A10

A18

A13

A14

A11

A35

A31

•

Mounting with crossbeam Mounting without crossbeam

A16

•

• A1

•

A1 Vent plug A2 Bottom diaphragm case A3 Actuator stem A10 Spring A11 Rod A12 Bushing A13 Diaphragm plate A14 Diaphragm plate

Fig.9: Version with 120cm² actuator area

•

A30

•

A17

A16 Top diaphragm case A17 Crossbeam A18 Diaphragm A26 Collar nut A30/

Stem connector clamps

A31 A35 Pneumatic connection A72 Rod nut

•

A12

•

A72

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Mounting and start-up

A11

5.1.1 120cm² version

Mounting using crossbeam (FormB, see Fig.10)

NOTICE

The actuator can be damaged. Do not loosen the rod nuts (A72) that hold the crossbeam (A17) on the rods (A11).

1. Remove the clamps of the stem connector (A30) from the actuator.

2. Unscrew the central nut (98) from the valve bonnet (2).

3. Press the plug together with the plug stem rmly into the seat ring.

4. Place the actuator with the crossbeam (A17) onto the thread of the valve bonnet (2), guiding the central nut (98) over

the plug stem and fasten it to the valve bonnet. Observe tightening torques.

5. "Stem extends" direction of action: Position clamps of the stem connector (A30) and screw them tight. Observe tightening torques.

"Stem retracts" direction of action: apply enough pressure to the top diaphragm chamber to make the actuator stem touch the plug stem. Position clamps of the stem connector (A30) and screw them tight. Observe tightening torques.

WARNING

Crush hazard arising from moving parts. The actuator contains moving parts (actuator stem), which can injure hands or ngers if inserted into the actuator. Do not insert hands or ngers into the yoke.

A17

2 Valve bonnet 98 Central nut A11 Rod A17 Crossbeam A72 Rod nut

Fig.10: Mounting using crossbeam (FormB)

A72

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Page 25

Mounting and start-up

A11

A60

A72

A12

Mounting using rods (FormC, see Fig.11)

1. Remove the stem connector clamps (A31) from the actuator.

2. Insert the rods (A11) into the bushings (A12) and place them in the corresponding holes on the valve bonnet (2).

3. Tighten the rod nuts (A72) in alternating sequence. Observe tightening torques.

4. "Stem extends" direction of action: position clamps of the stem connector (A31) and screw them tight. Observe tightening torques.

"Stem retracts" direction of action: apply enough pressure to the top diaphragm chamber to make the actuator stem touch the plug stem. Position clamps of the stem connector (A31) and screw them tight. Observe tightening torques.

WARNING

2 Valve bonnet A11 Rod A12 Bushing A60 Plate

Fig.11: Mounting using rods (FormC), 120cm²

A72 Rod nut

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Mounting and start-up

A33/A51

5.1.2 350cm² version

Mounting using rods (FormC, see Fig.12)

1. Remove the clamps of the stem connector from the actuator.

2. Unscrew the rod nuts (A54) from the rods (A33, A51). Leave the plate (A60) attached to the rods.

3. Place the actuator with the rod ends on the valve bonnet (2).

4. Tighten the rod nuts (A54) in alternating sequence. Make sure that the rods on the bottom case do not turn. Observe tightening torques.

5. "Stem extends" direction of action: position clamps of the stem connector and

screw them tight. Observe tightening torques.

"Stem retracts" direction of action: apply enough pressure to the top diaphragm chamber to make the actuator stem touch the plug stem. Position the clamps of the stem connector and screw them tight. Observe tightening torques.

WARNING

A60

Fig.12: Mounting using rods (FormC), 350cm²

2 Valve bonnet A33/A51 Rod A54 Rod nut A60 Plate

A54

26 EB 8317 EN

Page 27

Mounting and start-up

A11

A60

A72

A12

5.2 Changing the mounting type

The mounting type of actuators with 120cm² actuator area can be changed subsequently.

Note

Table1 provides an overview of the possible combinations (FormB and FormC).

A17

A72

5.2.1 Changing the mounting type to mounting using

rods (FormB to FormC)

Note

For mounting the rods, a plate (A60) and two bushings (A12) are required to adapt it to the rod diameter.

1. Remove the clamps of the stem connec-

tor.

2. Unscrew the central nut (98).

3. Lift the actuator off the valve bonnet (2).

4. Undo the rod nuts (A72).

right)

A12 Bushing A17 Crossbeam

A60 Plate A72 Rod nut

2 Valve bonnet 98 Central nut A11 Rod

Fig.13: Mounting types: mounting using crossbeam (FormB, left) and mounting using rods (FormC,

EB 8317 EN 27

Page 28

Mounting and start-up

5. Remove the crossbeam (A17).

6. Place the plate (A60) over the rods (A11).

7. Screw bushings (A12) onto the thread of the rods.

8. Place the rods (A11) on the valve bonnet (2). Place the rod nuts (A72) on the bushings (A12) and tighten in alternating sequence. Observe tightening torques.

9. "Stem extends" direction of action: position clamps of the stem connector and screw them tight. Observe tightening torques.

5.2.2 Changing the mounting

type to mounting using

a crossbeam (FormC to FormB)

4. Undo the bushings (A12) from the rod nuts.

5. Remove the plate (A60).

6. Place the crossbeam (A17) on the rods (A11) in such a way that the bent side faces away from the actuator housing. Fasten the crossbeam using the rod nuts (A72). Observe tightening torques.

7. Unscrew the central nut (98) from the valve bonnet (2).

8. Place the actuator on the valve bonnet (2). Tighten the central nut (98). Observe tightening torques.

9. "Stem extends" direction of action: position clamps of the stem connector and screw them tight. Observe tightening torques.

5.3 Preloading the springs

Note

To mount the crossbeam, a crossbeam (A17), two serrated lock washers (A28), and two caps (A70) are required.

1. Remove the clamps of the stem connector.

2. Undo the rod nuts (A72) from the bushings (A12).

3. Lift the actuator off the valve bonnet (2).

28 EB 8317 EN

By preloading the springs in the actuator, the following can be achieved:

− The thrust is increased (only actuators with "stem extends")

− In combination with a SAMSON valve: the actuator travel range can be adapted to a smaller valve travel range

Page 29

Mounting and start-up

Note

Actuators that have already been preloaded by SAMSON without mounting the valve are labeled correspondingly. Additionally, these actuators can be identied by long bolts with nuts protruding from the bottom diaphragm case. They allow the spring compression to be relieved evenly when disassembling the actuator (see section9.3).

5.3.1 Increasing the actuator thrust

The thrust can only be increased in actuators with "stem extends" direction of action. To achieve this, the springs of the actuators can be preloaded by up to 25% of their travel or bench range.

Example: Preloading is required for a signal pressure range of1.4 to 2.3bar. 25% of this span corresponds to 0.2bar. Therefore, the signal pressure range is shifted by

0.2bar to 1.6 to 2.5bar. The new lower

signal pressure range value is 1.6bar and the new upper signal pressure range value

2.5bar.

Î Write the new signal pressure range of

1.6 to 2.5bar on the actuator nameplate as the operating range with preloaded springs.

5.3.2 Adapting the travel range

In some cases, the valve and actuator have different rated travels. Depending on the direction of action, proceed as follows:

Direction of action: actuator stem extends

Always use actuators with preloaded springs when the valve's rated travel is smaller than the rated travel of the actuator.

Example: DN15 valve with 7.5mm rated travel and 120cm² actuator with 15mm rated travel; 1.4 to 2.3bar bench range.

The signal pressure for half of the actuator travel (7.5mm) is 1.85bar. Adding it to the lower signal pressure range value of 1.4bar results in a signal pressure of 3.25bar required for preloading the springs. The new lower signal range value is 3.25bar and the new upper signal range value 4.15bar.

Î Write the new signal pressure range of

3.25 to 4.15bar on the actuator nameplate as the operating range with preloaded springs.

Direction of action: actuator stem retracts

The springs of actuators with "stem retracts" action cannot be preloaded. When a SAMSON valve is combined with an oversized actuator (e.g. the rated travel of the actuator is larger than the rated travel of the valve), only the rst half of the actuator's bench range can be used.

Example: DN15 valve with 7.5mm rated travel and 120cm² actuator with 15mm rated travel; 1.4 to 2.3bar bench range.

EB 8317 EN 29

Page 30

Mounting and start-up

At half the valve travel, the operating range is between1.4 and 1.85bar.

5.4 Additional ttings

Vent plugs

Vent plugs are screwed into the exhaust air ports of pneumatic and electropneumatic devices. They ensure that any exhaust air that forms can be vented to the atmosphere (to avoid excess pressure in the device). Furthermore, the vent plugs allow air intake to prevent a vacuum from forming in the device.

Î Locate the vent plug on the opposite side

to the workplace of operating personnel.

Î On mounting valve accessories, make

sure that they can be operated from the workplace of the operating personnel.

Note

The workplace of operating personnel is the location from which the valve, actuator, and any mounted valve accessories can be accessed to operate them.

30 EB 8317 EN

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Operation

6 Operation

WARNING

Crush hazard arising from moving parts (actuator stem). Do not insert hands or ngers into the yoke while the valve is in operation.

WARNING

Risk of personal injury when the actuator vents. Wear eye protection when working in close proximity to the control valve.

NOTICE

Operating disturbed by a blocked actuator stem. Do not impede the movement of the actuator stem by inserting objects into its path.

6.1 On/off service

In on/off service, the supply pressure must be limited depending on the bench range or signal pressure range of the actuator. The applicable bench range or signal pressure range which the actuator can move through is written on the nameplate (see section2.1).

Bench range

0.4 to 1.4bar

1.4 to 2.3bar 5.3bar

1.5 to 2.1bar 5.1bar

Fail-safe

action

Actuator stem

retracts

Max.

supply

pressure

4.4bar

Actuator stem extends (FA)

With “stem extends” direction of action, the supply pressure can be 6bar above the upper spring range value at the maximum. With "stem extends" direction of action and travel stop, the supply pressure must not exceed the upper spring range value by more than 1.5bar.

Additional points that apply concerning op-

eration:

Î Label actuators with reduced supply

pressure with a sticker ("Max. supply pressure limited to ... bar").

Î Only apply the signal pressure to the sig-

nal pressure connection (S) on the diaphragm chamber of the actuator which does not contain any springs (see Fig.7).

Î Only use vent plugs that let air through

them (A1 in Fig.3).

Actuator stem retracts (FE)

For the direction of action "actuator stem retracts (FE)", the permissible supply pressure must not exceed the upper bench range value by more than 3bar:

EB 8317 EN 31

Page 32

Operation

6.2 Reversal of the direction of action

The direction of action (and fail-safe action) of pneumatic actuators can be changed. The fail-safe action is indicated on the nameplate by a symbol (see section2.1).

Actuator stem extends (FA)

Actuator stem retracts (FE)

DANGER

Risk of bursting in the actuator. Actuators are pressurized. Improper opening can lead to actuator components bursting. Before starting any work on the actuator, depressurize all plant sections concerned and the actuator.

WARNING

Risk of personal injury due to preloaded springs. Actuators with preloaded springs are under tension. They can be identied by the long bolts protruding from the bottom of the actuator. Before starting any work on the actuator, relieve the compression from the preloaded springs (see section9.3).

NOTICE

Risk of malfunction due to incorrect details on the nameplate after the reversal of the direction of action.

After reversal, the symbol and conguration ID on the nameplate are no longer valid. Contact SAMSON to request a new nameplate.

6.2.1 120cm² version

Reversal of the direction of action from “stem extends” to “stem retracts”

1. Lift the actuator off the valve. See section9.2.

2. Without spring compression: unthread the short nuts (A24) and bolts (A22) on the diaphragm cases.

With spring compression: unthread the short nuts (A24) and bolts (A22) on the diaphragm cases. Unthread the long nuts (A24) and bolts (A23) on the diaphragm cases evenly in a crisscross pattern.

3. Lift off the top diaphragm case (A16) and remove springs (A10).

4. Pull the actuator stem (A3) together with the diaphragm plate (A14), diaphragm (A18), and diaphragm plate (A13) out of the bottom diaphragm case (A2).

5. Unscrew the collar nut (A26).

6. Remove the diaphragm plate (A14), diaphragm (A18), and diaphragm plate (A13) from the actuator stem (A3) and place them back on again in the reverse order.

7. Tighten the collar nut (A26). Observe tightening torques.

8. Apply a suitable lubricant to the actuator stem (A3).

32 EB 8317 EN

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Operation

9. Place the springs (A10) in the bottom diaphragm case (A2), centering them in the intended recesses.

10. Place the actuator stem (A3) together with the diaphragm plate (A14), diaphragm (A18), and diaphragm plate (A13) in the bottom diaphragm case (A2). Make sure that the radial shaft seal (A40) is not damaged.

11. Place on the top diaphragm case (A16).

12. Fasten the top and bottom diaphragm cases (A16, A2) together using the nuts (A24) and bolts (A22). Observe tightening torques.

13. Mount the actuator on the valve (see section5.1).

The actuator springs, which now push against the diaphragm plate from below, cause the actuator stem to retract. The signal pressure is connected to the top connection (S) on the top diaphragm case. As a result, the actuator stem extends opposing the spring force as the signal pressure increases.

14. Afx a new nameplate with changed symbol and new conguration ID to the actuator.

Reversal of the direction of action from “stem retracts” to “stem extends”

1. Lift the actuator off the valve. See section9.2.

2. Unscrew the nuts (A24) and bolts (A22) on the diaphragm case.

3. Lift off the top diaphragm case (A16).

4. Pull the actuator stem (A3) together with the diaphragm plate (A14), diaphragm (A18), and diaphragm plate (A13) out of the bottom diaphragm case (A2).

5. Remove the springs (A10).

6. Unscrew the collar nut (A26).

7. Remove the diaphragm plate (A14), diaphragm (A18), and diaphragm plate (A13) from the actuator stem (A3) and place them back on again in the reverse order.

8. Tighten the collar nut (A26). Observe tightening torques.

9. Apply a suitable lubricant to the actuator stem (A3).

11. Place the springs (A10) in the bottom diaphragm case (A2), centering them in the intended recesses.

12. Place on the top diaphragm case (A16).

13. Without spring compression: fasten the top and bottom diaphragm cases (A16, A2) together with the nuts (A24) and bolts (A22). Observe tightening torques.

With spring compression: fasten the top and bottom diaphragm cases (A16, A2) together with the nuts (A24) and long bolts (A23). Fasten the nuts (A24) and short bolts (A22). Observe tightening torques.

EB 8317 EN 33

Page 34

Operation

14. Mount the actuator on the valve (see section5.1).

The actuator springs, which now push against the diaphragm plate from above, cause the actuator stem to extend. The signal pressure is connected to the bottom connection (S) on the bottom diaphragm case. As a result, the actuator stem retracts opposing the spring force as the signal pressure increases.

15. Afx a new nameplate with changed symbol and new conguration ID to the actuator.

6.2.2 350cm² version

Reversal of the direction of action from “stem extends” to “stem retracts”

1. Lift the actuator off the valve. See section9.2.

2. Without spring compression: unthread the short nuts (A21) and bolts (A20) on the diaphragm cases.

With spring compression: unthread the short nuts (A21) and bolts (A20) on the diaphragm cases. Unthread the long nuts (A21) and bolts (A22) on the diaphragm cases evenly in a crisscross pattern.

3. Lift off the top diaphragm case (A1) and remove springs (A10).

4. Pull the actuator stem (A7) together with the diaphragm plate (A5) and diaphragm (A4) out of the bottom diaphragm case (A2).

5. Unscrew the collar nut (A15).

6. Take the compressor (A27), diaphragm plate (A5), and diaphragm (A4) off the actuator stem (A7) and place them back on again in the reverse order.

7. Tighten the collar nut (A15). Observe tightening torques.

8. Apply a suitable lubricant to the actuator stem (A7).

9. Place the springs (A10) in the bottom diaphragm case (A2), centering them in the intended recesses.

10. Insert the actuator stem (A7) together with the diaphragm plate (A5) and diaphragm (A4) into the bottom diaphragm case (A2). Make sure that the radial shaft seal (A40) is not damaged.

11. Place on the top diaphragm case (A1).

12. Fasten the top and bottom diaphragm cases (A1, A2) together using the nuts (A21) and bolts (A20).

13. Afx a new nameplate with changed symbol and new conguration ID to the actuator.

Reversal of the direction of action from “stem retracts” to “stem extends”

1. Lift the actuator off the valve. See section9.2.

34 EB 8317 EN

Page 35

Operation

A75

2. Unscrew the nuts (A21) and bolts (A20) on the diaphragm case.

3. Lift off the top diaphragm case (A1).

4. Pull the actuator stem (A7) together with the diaphragm plate (A5) and diaphragm (A4) out of the bottom diaphragm case (A2).

5. Remove the springs (A10).

6. Unscrew the collar nut (A15).

7. Take the compressor (A27), diaphragm plate (A5), and diaphragm (A4) off the actuator stem (A7) and place them back on again in the reverse order.

8. Tighten the collar nut (A15).

9. Apply a suitable lubricant to the actuator stem (A7).

10. Insert the actuator stem (A7) together with the diaphragm plate (A5) and diaphragm (A4) into the bottom diaphragm case (A2). Make sure that the radial shaft seal (A40) is not damaged.

11. Place the springs (A10) in the bottom diaphragm case (A2), centering them in the intended recesses.

12. Place on the top diaphragm case (A1).

13. Without spring compression: fasten the top and bottom diaphragm cases (A1, A2) together with the nuts (A21) and bolts (A20). Observe tightening torques.

With spring compression: fasten the top and bottom diaphragm cases (A1, A2) together with the nuts (A21) and long bolts (A22). Fasten the nuts (A21) and short bolts (A20). Observe tightening torques.

A79

A73 Spindle A75 Cover A76 Lock nut A77 Top diaphragm case A79 Lock nuts

Fig.14: Travel stop for 120cm² version

A73

A76

A77

EB 8317 EN 35

Page 36

Operation

A63/64

A62

14. Afx a new nameplate with changed symbol and new conguration ID to the actuator.

6.3 Version with travel stop

The Type3371 Pneumatic Actuator (120cm²) can optionally be tted with a travel stop to limit the minimum and maximum travel. These stops can be combined.

A65

6.3.1 Bottom travel stop (minimum travel)

1. Loosen lock nut (A76) and remove cover

(A75).

2. Loosen the lock nuts (A79).

3. Move actuator to the position of mini-

mum travel.

4. Screw the bottom nut (A79) on as far as

it will go and lock this position with the top nut (A79).

A60 Upper actuator section

A68

A66

A62 Spindle A63/64 Cover A65 Pin A66 Sleeve A68 Retaining washer

A60

Fig.15: Handwheel with 120cm² version

36 EB 8317 EN

Page 37

Operation

Note

If the minimum travel is not to be limited, thread the nuts (A79) until they reach the end of the spindle (A73) and lock them in position.

5. Attach the cover (A75) and retighten the lock nut (A76).

6.3.2 Top travel stop (maximum

travel)

1. Loosen the lock nut (A76).

2. Unscrew the cover (A75).

3. Move actuator to the position of maximum travel.

4. Screw back on the cover (A75) as far it will go and retighten the lock nut (A76).

6.4 Version with handwheel

The Type3371 Pneumatic Actuator (120cm²) can optionally tted with a handwheel. The actuator stem can be moved over a spindle. The actuator travel is adjusted against the spring force (see Fig.15).

The pin (A65) moves up or down in the oblong hole of the sleeve (A66) depending on which way the handwheel is turned. This causes the spindle (A62) to either extend or retract.

6.4.1 Operating the handwheel of version with "stem extends" direction of action

1. Turn the handwheel counterclockwise.

The actuator stem retracts causing a globe valve to open.

2. Retract the actuator stem up to the re-

quired position.

6.4.2 Operating the handwheel of version with "stem retracts" direction of action

1. Turn the handwheel clockwise. The actu-

ator stem extends causing a globe valve to close.

2. Extend the actuator stem up to the re-

quired position.

Note

If you want to t a handwheel to an actuator, contact SAMSON's After-sales Service department.

EB 8317 EN 37

Page 38

Servicing

7 Servicing

Depending on the operating conditions, check the actuator at regular intervals to prevent possible failure before it can occur.

Tip

SAMSON's After-sales Service department can support you to draw up an inspection plan for your plant.

DANGER

WARNING

NOTICE

Risk of actuator damage due to incorrect service or repair. Service and repair work must only be performed by trained staff.

NOTICE

Risk of actuator damage due to excessively high or low tightening torques. Observe the specied torques on tightening actuator components. Excessively tightened torques lead to parts wearing out quicker. Parts that are not tightened far enough may impair the actuator functioning properly. Observe the specied tightening torques (uAB0100).

NOTICE

Risk of actuator damage due to the use of unsuitable tools. Only use tools approved by SAMSON (uAB0100).

NOTICE

Risk of actuator damage due to the use of unsuitable lubricants. Only use lubricants approved by SAMSON (uAB0100).

Note

− The product warranty becomes void if ser- vice or repair work not described in these instructions is performed without prior agreement by SAMSON's After-sales Service department.

− Only use original spare parts by SAMSON, which comply with the original specications.

38 EB 8317 EN

Page 39

Servicing

7.1 Replacing the diaphragm

7.1.1 120cm² version

Tip

Before dismantling the actuator, mark both diaphragm cases (A16, A2) to ensure that the pneumatic connections are mounted correctly later on reassembling the actuator.

Version with direction of action "actuator

stem extends" (FA)

1. Lift the actuator off the valve. See section9.2.

2. Without spring compression: unthread the short nuts (A24) and bolts (A22) on the diaphragm cases.

With spring compression: unthread the short nuts (A24) and bolts (A22) on the diaphragm cases. Unthread the long nuts (A24) and bolts (A23) on the diaphragm cases evenly in a crisscross pattern.

3. Lift off the top diaphragm case (A16) and remove springs (A10).

4. Pull the actuator stem (A3) together with the diaphragm plate (A14), diaphragm (A18), and diaphragm plate (A13) out of the bottom diaphragm case (A2).

5. Unscrew the collar nut (A26).

6. Remove the diaphragm plate (A14), diaphragm (A18), and diaphragm plate (A13) from the actuator stem (A3).

7. Place the new diaphragm on the diaphragm plate (A13). Place on the diaphragm plate (A14).

8. Check the sealing element on the collar nut (A26). If necessary, renew it.

9. Tighten the collar nut (A26). Observe tightening torques.

10. Apply a suitable lubricant to the actuator stem (A3).

11. Place the actuator stem (A3) together with the diaphragm plate (A14), diaphragm (A18), and diaphragm plate (A13) in the bottom diaphragm case (A2). Make sure that the radial shaft seal (A40) is not damaged.

12. Place the springs (A10) into the bottom diaphragm case, centering them in the intended recesses.

13. Place on the top diaphragm case (A16).

14. Without spring compression: fasten the top and bottom diaphragm cases (A16, A2) together with the nuts (A24) and bolts (A22). Observe tightening torques.

15. Mount the actuator on the valve (see section5.1).

Version with direction of action "actuator

stem retracts" (FE)

1. Lift the actuator off the valve. See section9.2.

EB 8317 EN 39

Page 40

Servicing

A26 A10

A18

A13

A14

A11

A35

A31

A72

A12

•

Mounting with crossbeam Mounting without crossbeam

A16

•

• A1

•

A1 Vent plug A2 Bottom diaphragm case A3 Actuator stem A10 Spring A11 Rod A12 Bushing A13 Diaphragm plate A14 Diaphragm plate

Fig.16: Version with 120cm² actuator area

•

A30

•

A17

A16 Top diaphragm case A17 Crossbeam A18 Diaphragm A26 Collar nut A30/

Stem connector clamps

A31 A35 Pneumatic connection A72 Rod nut

•

40 EB 8317 EN

Page 41

Servicing

2. Unscrew the nuts (A24) and bolts (A22) on the diaphragm case.

3. Lift off the top diaphragm case (A16).

4. Pull the actuator stem (A3) together with the diaphragm plate (A14), diaphragm (A18), and diaphragm plate (A13) out of the bottom diaphragm case (A2).

5. Unscrew the collar nut (A26).

6. Remove the diaphragm plate (A14), diaphragm (A18), and diaphragm plate (A13) from the actuator stem (A3).

7. Place the new diaphragm on the diaphragm plate (A13). Place on the diaphragm plate (A14).

8. Check the sealing element on the collar nut (A26). If necessary, renew it.

9. Tighten the collar nut (A26). Observe tightening torques.

10. Check whether the springs (A10) rest correctly in the bottom diaphragm case (A2).

11. Apply a suitable lubricant to the actuator stem (A3).

12. Place the actuator stem (A3) together with the diaphragm plate (A14), diaphragm (A18), and diaphragm plate (A13) in the bottom diaphragm case (A2). Make sure that the radial shaft seal (A40) is not damaged.

13. Place on the top diaphragm case (A16).

14. Fasten the top and bottom diaphragm cases (A16, A2) together using the nuts (A24) and bolts (A22). Observe tightening torques.

15. Mount the actuator on the valve (see section5.1).

7.1.2 350cm² version

Tip

Before dismantling the actuator, mark both diaphragm cases (A1, A2) to ensure that the pneumatic connections are mounted correctly later on reassembling the actuator.

Version with direction of action "actuator

stem extends" (FA)

1. Lift the actuator off the valve. See section9.2.

2. Without spring compression: unthread the short nuts (A21) and bolts (A20) on the diaphragm cases.

With spring compression: unthread the short nuts (A21) and bolts (A20) on the diaphragm cases. Unthread the long nuts (A21) and bolts (A22) on the diaphragm cases evenly in a crisscross pattern.

3. Lift off the top diaphragm case (A1) and remove springs (A10).

4. Pull the actuator stem (A7) together with the diaphragm plate (A5) and diaphragm (A4) out of the bottom diaphragm case (A2).

5. Unscrew the collar nut (A15).

6. Take the compressor (A27), diaphragm plate (A5), and diaphragm (A4) off the actuator stem (A7).

7. Place the new diaphragm on the diaphragm plate (A5).

EB 8317 EN 41

Page 42

Servicing

A61

A10

A15

A51

A50

A25

A20

A21

A27

A5 A4

A33

A1 Top diaphragm case A2 Bottom diaphragm case A4 Diaphragm A5 Diaphragm plate A7 Actuator stem A10 Spring A15 Collar nut

•

A40

A42

A41

•

A20 Hexagon bolt A21 Hexagon nut A25 Washer A27 Compressor A33 Rod A40 Radial shaft seal A41 Wiper ring

•

A60

A54

•

A42 Dry bearing A50 Screw for rod (A51) A51 Rod A54 Rod nut A60 Plate A61 Pneumatic connection S Signal pressure

connection (stem retracts)

Fig.17: Type3371 with 350cm² actuator area

42 EB 8317 EN

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Servicing

8. Place the compressor (A27) onto the actuator stem (A7).

9. Check the sealing element on the collar nut (A15). If necessary, renew it.

10. Tighten the collar nut (A15). Observe tightening torques.

11. Apply a suitable lubricant to the actuator stem (A7).

12. Insert the actuator stem (A7) together with the diaphragm plate (A5) and diaphragm (A4) into the bottom diaphragm case (A2). Make sure that the radial shaft seal (A40) is not damaged.

13. Place the springs (A10) into the bottom diaphragm case, centering them in the intended recesses.

14. Place on the top diaphragm case (A1).

15. Without spring compression: fasten the top and bottom diaphragm cases (A1, A2) together with the nuts (A21) and bolts (A20). Observe tightening torques.

With spring compression: fasten the top and bottom diaphragm cases (A1, A2) together with the nuts (A21) and long bolts (A22). Fasten the nuts (A21) and short bolts (A20). Observe tightening torques.

16. Mount the actuator on the valve (see section5.1).

Version with direction of action "actuator

stem retracts" (FE)

1. Lift the actuator off the valve. See section9.2.

2. Unscrew the nuts (A21) and bolts (A20) on the diaphragm case.

3. Lift off the top diaphragm case (A1).

4. Pull the actuator stem (A7) together with the diaphragm plate (A5) and diaphragm (A4) out of the bottom diaphragm case (A2).

5. Unscrew the collar nut (A15).

6. Take the compressor (A27), diaphragm plate (A5), and diaphragm (A4) off the actuator stem (A7).

7. Place the new diaphragm on the diaphragm plate (A5).

8. Place the compressor (A27) onto the actuator stem (A7).

9. Check the sealing element on the collar nut (A15). If necessary, renew it.

10. Tighten the collar nut (A15). Observe tightening torques.

11. Check whether the springs (A10) rest correctly in the bottom diaphragm case (A2).

12. Apply a suitable lubricant to the actuator stem (A7).

13. Insert the actuator stem (A7) together with the diaphragm plate (A5) and diaphragm (A4) into the bottom diaphragm case (A2). Make sure that the radial shaft seal (A40) is not damaged.

14. Place on the top diaphragm case (A1).

15. Fasten the top and bottom diaphragm cases (A1, A2) together using the nuts (A21) and bolts (A20). Observe tightening torques.

16. Mount the actuator on the valve (see section5.1).

EB 8317 EN 43

Page 44

Servicing

7.2 Preparation for return shipment

Defective actuators can be returned to SAMSON for repair.

Proceed as follows to return valves to SAMSON:

1. Put the control valve out of operation.

See associated valve documentation.

2. Remove the actuator from the valve (see

section9.2).

3. Send the actuator to your nearest

SAMSON subsidiary. SAMSON subsidiaries are listed on our website at

uwww.samson.de > Contact.

7.3 Ordering spare parts and operating supplies

Contact your nearest SAMSON subsidiary or the SAMSON After-sales Service department for information on spare parts, lubricants, and tools.

Spare parts

See section10.2 for details on spare parts.

Lubricant

Details on suitable lubricants can be found in the document uAB0100.

Tools

Details on suitable tools can be found in the document uAB0100.

44 EB 8317 EN

Page 45

Malfunctions

8 Malfunctions

Depending on the operating conditions, check the actuator at certain intervals to prevent possible failure before it can occur. Operators are responsible for drawing up an inspection plan.

Tip

SAMSON's After-sales Service department can support you to draw up an inspection plan for your plant.

Troubleshooting

Malfunction Possible reasons Recommended action

Actuator stem does not move on demand.

Actuator stem does not stroke through its complete travel range.

Actuator is blocked. Check attachment.

Unblock the actuator.

Insufcient signal pressure Check the signal pressure.

Check the signal pressure line for leakage.

Signal pressure not connected to the correct diaphragm chamber.

Travel stop active See section6.3. Insufcient signal pressure Check the signal pressure.

Valve accessories incorrectly set. Check the actuator without valve

See section3.2.

Check the signal pressure line for leakage.

accessories. Check the settings of the valve

accessories.

Note

Contact SAMSON's After-sales Service department for malfunctions not listed in the table.

EB 8317 EN 45

Page 46

Decommissioning and disassembly

9 Decommissioning and disas-

sembly

DANGER

WARNING

9.1 Decommissioning

To decommission the actuator for service and repair work or disassembly, proceed as follows:

1. Put the control valve out of operation.

See associated valve documentation.

2. Disconnect the pneumatic air supply to

depressurize the actuator.

9.2 Removing the actuator from the valve

9.2.1 120cm² version

For mounting using crossbeam (FormB)

1. Put the control valve out of operation.

See associated valve documentation.

2. Remove the clamps of the stem connector

(A30) from the actuator.

3. Removing actuators with "stem ex-

tends" action with/without preloaded

springs: to undo the central nut (98), apply approx. 50% signal pressure to open the valve.

4. Unscrew the central nut (98) from the

plug stem.

5. Disconnect the signal pressure again.

6. In the "actuator stem retracts" version:

detach the external piping.

7. Lift the central nut (98) and actuator off

the valve.

8. Screw tight the central nut (98) on the

valve.

9. Screw tight the stem connector clamps

(A30) onto the actuator. Observe tightening torques.

NOTICE

The actuator can be damaged. Do not loosen the rod nuts (A72) that hold the crossbeam (A17) on the rods (A11).

46 EB 8317 EN

Page 47

Decommissioning and disassembly

For mounting using rods (FormC)

1. Put the control valve out of operation. See associated valve documentation.

2. Remove the clamps of the stem connector (A31) from the actuator.

3. Undo the rod nuts (A72) in alternating sequence.

4. Pull the rods (A11) with bushings (A12) out of the holes in the valve bonnet (2).

5. Remove the bushings (A12) from the actuator and thread the rod nuts (A72) onto the rods (A11).

6. Screw tight the stem connector clamps (A31) onto the actuator. Observe tightening torques.

9.2.2 350cm² version

1. Put the control valve out of operation. See associated valve documentation.

2. In the "actuator stem retracts" version: detach the external piping.

3. Remove the clamps of the stem connector (A12) from the actuator.

4. Undo the rod nuts (A54) in alternating sequence.

5. Pull the rods (A33, A51) out of the holes in the valve bonnet (2).

6. Thread the rod nuts (A54) onto the rods (A33, A51) on the actuator.

7. Screw tight the stem connector clamps (A12) onto the actuator. Observe tightening torques.

9.3 Relieving the spring compression in the actuator

1. Undo the short nuts and bolts on the dia-

phragm cases.

2. Undo the the long bolts on the dia-

phragm cases evenly in a crisscross pattern.

9.4 Disposal

Î Observe local, national, and internation-

al refuse regulations.

Î Do not dispose of components, lubri-

cants, and hazardous substances together with your other household waste.

EB 8317 EN 47

Page 48

Annex

10 Annex

10.1 After-sales service

Contact SAMSON's After-sales Service department for support concerning service or repair work or when malfunctions or defects arise.

E-mail

You can reach the After-sales Service Department at aftersalesservice@samson.de.

Addresses of SAMSONAG and its subsidiaries

The addresses of SAMSON AG, its subsidiaries, representatives, and service facilities worldwide can be found on the SAMSON website, in all SAMSON product catalogs or on the back of these Mounting and Operating Instructions.

Required specications

Please submit the following details:

− Order number and position number in the order

− Type, model number, actuator area, trav- el and bench range (e.g. 0.2 to 1bar) or the operating range of the actuator

− Type designation of mounted valve (if applicable)

− Installation drawing

48 EB 8317 EN

Page 49

10.2 Spare parts

Annex

Type3371 Actuator with 120cm² actuator area

1 Vent plug 2 Bottom diaphragm case

2.2 Radial shaft seal

2.3 Wiper ring

2.4 Dry bearing 3 Actuator stem 4 Stopper 5 Label (preloading) 6 Nameplate

7/8/9/10 Spring

11 Rod 12 Bushing 13 Diaphragm plate 14 Diaphragm plate 16 Top diaphragm case 17 Crossbeam 18 Diaphragm 20 Screw plug 21 Screw-on cap 22 Hexagon bolt 23 Hexagon bolt 24 Hexagon nut 25 Hexagon nut 26 Collar nut 27 Washer 28 Serrated lock washer

30/31 Stem connector clamps

35 Pneumatic connection 37 Rod 60 Upper actuator section 62 Spindle 63 Device cover 64 Device cover 65 Pin

1)

66 Sleeve

68 Retaining washer 70 Protective cap 72 Rod nut (hexagon nut) 73 Spindle 74 Sleeve

74.1 Dry bearing

74.2 Radial shaft seal 75 Cover 76 Lock nut

2)

77 Top diaphragm case 79 Lock nut

Only for version with handwheel

Only for version with travel stop

EB 8317 EN 49

Page 50

Version with hand-

wheel

Type3371 Actuator with

120cm² actuator area

21 24

7/8/9/10

50 EB 8317 EN

Page 51

Mounting

without cross-

beam

74.2

74.1

21 24 27

20/1

Version with travel

stop

Standard version

Mounting with

crossbeam

4 5

2.2

2.4

2.3

20/1

17 28

EB 8317 EN 51

Page 52

Annex

Type3371 Actuator with 350cm² actuator area

1 Top diaphragm case 2 Bottom diaphragm case 4 Diaphragm 5 Diaphragm plate 7 Actuator stem

10/11 Spring

12 Stem connector clamp 13 Stem connector clamp 14 Screw 15 Collar nut 16 Vent plug 20 Hexagon bolt 21 Hexagon nut 22 Hexagon bolt (preloading) 25 Washer 27 Compressor 33 Rod 37 Washer 40 Radial shaft seal 41 Wiper ring 42 Dry bearing 50 Screw for rod (51) 51 Rod 52 Washer (version with "actuator stem re-

tracts" only) 53 O-ring 54 Rod nut 55 Bushing 56 Snap ring 57 O-ring 60 Plate 61 Pneumatic connection

100 Nameplate 101 Label (preloading)

52 EB 8317 EN

Page 53

Type3371 Actuator with 350cm² actuator area

40 55

101100

21 53

51 33

60 54

EB 8317 EN 53

Page 54

54 EB 8317 EN

Page 55

EB 8317 EN 55

Page 56

SAMSON AG · MESS- UND REGELTECHNIK Weismüllerstraße 3 · 60314 Frankfurt am Main, Germany Phone: +49 69 4009-0 · Fax: +49 69 4009-1507 samson@samson.de · www.samson.de

EB 8317 EN

2017-05-04 · English

Samson 3371 Series Mounting And Operating Instructions

Specifications and Main Features

Frequently Asked Questions

User Manual

1 Safety instructions and measures

1.1 Notes on possible severe personal injury

2 Markings on the device

2.1 Actuator nameplate

Design and principle of operation

3.2 Signal pressure routing

3.1 Direction of action

3.3 Fail-safe action

3.4 Mounting types

3.5 Versions

3.6 Technical data

4 Measures for preparation

4.1 Unpacking

4.2.1 Transporting

4.2.2 Lifting

4.2 Transporting and lifting

4.4 Preparation for installation

5 Mounting and start-up

5.1 Mounting the actuator onto the valve

5.2 Changing the mounting type

5.3 Preloading the springs

5.3.1 Increasing the actuator thrust

5.3.2 Adapting the travel range

6 Operation

6.1 On/off service

6.3 Version with travel stop

6.4 Version with handwheel

7 Servicing

7.1 Replacing the diaphragm

7.3 Ordering spare parts and operating supplies

8 Malfunctions

Decommissioning and disassembly

9.1 Decommissioning

9.2 Removing the actuator from the valve

9.4 Disposal

10 Annex

10.1 After-sales service

10.2 Spare parts