Samson 3251 Service manual

Mounting and
Operating Instructions
EB 8052 EN
Translation of original instructions
Edition July 2016
Type3251 Valve with Type3271 Actuator
Type 3251 Valve
In combination with an actuator,
e.g. a SAMSON Type3271 or Type3277 Pneumatic Actuator
ANSI version

2 EB 8052 EN
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.
ÎFor the safe and proper use of these instructions, read them carefully and keep them for
later reference.
ÎIf you have any questions about these instructions, contact SAMSON‘s After-sales Service
Department (aftersalesser[email protected]).
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
Hazardous situations which, if not avoided,
will result in death or serious injury
Hazardous situations which, if not avoided,
could result in death or serious injury
Property damage message or malfunction
Additional information
Recommended action
DANGER
!
WARNING
!
NOTICE
!
Note
Tip

Contents
EB 8052 EN 3
1 Safety instructions and measures ...................................................................5
1.1 Notes on possible severe personal injury .........................................................8
1.2 Notes on possible personal injury ...................................................................8
1.3 Notes on possible property damage................................................................9
2 Markings on the control valve......................................................................12
2.1 Valve nameplate ..........................................................................................12
2.2 Actuator nameplate......................................................................................13
2.3 Material number..........................................................................................13
3 Design and principle of operation ................................................................14
3.1 Fail-safe positions ........................................................................................14
3.2 Versions ......................................................................................................16
3.3 Technical data .............................................................................................16
4 Measures for preparation............................................................................24
4.1 Unpacking ..................................................................................................24
4.2 Transporting and lifting ................................................................................24
4.2.1 Transporting ................................................................................................25
4.2.2 Lifting..........................................................................................................25
4.3 Storage.......................................................................................................28
4.4 Preparation for installation............................................................................29
5 Mounting and start-up.................................................................................30
5.1 Mounting the actuator onto the valve.............................................................30
5.2 Installing the valve into the pipeline ...............................................................31
5.2.1 Checking the installation conditions...............................................................31
5.2.2 Additional ttings.........................................................................................32
5.2.3 Installing the control valve.............................................................................33
5.3 Quick check ................................................................................................34
6 Operation...................................................................................................36
6.1 Working in manual mode.............................................................................36
7 Servicing.....................................................................................................38
7.1 Replacing the gasket ....................................................................................39
7.1.1 Standard version..........................................................................................39
7.1.2 Version with insulating section or bellows seal................................................41

4 EB 8052 EN
Contents
7.2 Replacing the packing..................................................................................41
7.2.1 Standard version..........................................................................................41
7.2.2 Version with insulating section.......................................................................43
7.3 Replacing the seat and plug..........................................................................45
7.3.1 Standard version..........................................................................................47
7.3.2 Version with insulating section.......................................................................48
7.4 Preparation for return shipment.....................................................................49
7.5 Ordering spare parts and operating supplies .................................................49
8 Malfunctions ...............................................................................................50
8.1 Troubleshooting ...........................................................................................50
8.2 Emergency action ........................................................................................51
9 Decommissioning and disassembly ..............................................................52
9.1 Decommissioning.........................................................................................52
9.2 Removing the valve from the pipeline.............................................................52
9.3 Removing the actuator from the valve ............................................................53
9.4 Disposal......................................................................................................53
10 Annex.........................................................................................................54
10.1 After-sales service........................................................................................54
10.2 Certicates ..................................................................................................54
10.3 Spare parts .................................................................................................56

EB 8052 EN 5
Safety instructions and measures
1 Safety instructions and measures
Intended use
The SAMSON Type3251 Globe Valve in combination with an actuator (e.g. Type3271 or
Type3277 Pneumatic Actuator) is designed to regulate the ow rate, pressure or temperature
of liquids, gases or vapors. The valve with its actuator is designed to operate under exactly
dened conditions (e.g. operating pressure, process medium, temperature). Therefore, opera-
tors must ensure that the control valve is only used in applications that meet the specications
used for sizing the valve at the ordering stage. In case operators intend to use the control
valve 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
valve for its intended purpose or for damage caused by external forces or any other external
factors.
ÎRefer to the technical data and nameplate for limits and elds of application as well as
possible uses.
Reasonably foreseeable misuse
The control valve 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 valve accessories mounted on the control valve
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 control valve 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.

6 EB 8052 EN
Safety instructions and measures
Personal protective equipment
We recommend wearing the following protective equipment depending on the process medi-
um:
−Protective clothing, gloves, and eyewear in applications with hot, cold, and/or corrosive
media
−Wear hearing protection when working near the valve.
ÎCheck 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
Upon supply air or control signal failure, the valve moves to its fail-safe position (see
section3.1). The fail-safe action of the actuator is the same as its direction of action and is
specied on the nameplate of SAMSON actuators (see actuator documentation).
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 control valve by the process medium, the operat-
ing 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 oper-
ating 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 ex-
posed 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 ap-
plicable health, safety and accident prevention regulations and comply with them.

EB 8052 EN 7
Safety instructions and measures
Referenced standards and regulations
The control valves comply with the requirements of the European Pressure Equipment Direc-
tive 2014/68/EU. Valves with a CE marking have a declaration of conformity, which in-
cludes information about the applied conformity assessment procedure. This declaration of
conformity is included in the Appendix of these instructions (see section10.2).
According to the ignition risk assessment performed in accordance with EN13463-1:2009,
section 5.2, the non-electrical control valves 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.
ÎFor 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 mounted actuator, e.g. uEB8310-X for
SAMSON Type3271 and Type3277 Actuators
−Mounting and operating instructions for mounted valve accessories (positioner, solenoid
valve etc.)
−uWA0029 for tools and tightening torques

8 EB 8052 EN
Safety instructions and measures
1.1 Notes on possible severe personal injury
DANGER
!
Risk of bursting in pressure equipment.
Control valves and pipelines are pressure equipment. Improper opening can lead to
valve components bursting.
ÎBefore starting any work on the control valve, depressurize all plant sections
concerned as well as the valve.
ÎDrain the process medium from all the plant sections concerned as well as the
valve.
ÎWear personal protective equipment.
1.2 Notes on possible personal injury
WARNING
!
Crush hazard arising from moving parts.
The control valve contains moving parts (actuator and plug stems), which can injure
hands or ngers if inserted into the valve.
ÎDo not insert hands or ngers into the yoke while the valve is in operation.
ÎWhile working on the control valve, disconnect and lock the pneumatic air supply as
well as the control signal.
Risk of personal injury when the actuator vents.
While the valve is operating, the actuator may vent during closed-loop control or when
the valve opens or closes.
ÎInstall the control valve in such a way that the actuator does not vent at eye level.
ÎUse suitable silencers and vent plugs.
ÎWear eye protection when working in close proximity to the control valve.

EB 8052 EN 9
Safety instructions and measures
WARNING
!
Risk of personal injury due to preloaded springs.
Valves in combination with pneumatic actuators with preloaded springs are under ten-
sion. These control valves with SAMSON pneumatic actuators can be identied by the
long bolts protruding from the bottom of the actuator.
ÎBefore starting any work on the actuator, relieve the compression from the preload-
ed springs (see associated actuator documentation).
Risk of personal injury due to residual process medium in the valve.
While working on the valve, residual process medium can escape and, depending on
its properties, may lead to personal injury, e.g. (chemical) burns.
ÎIf possible, drain the process medium from all the plant sections concerned and the
valve.
ÎWear protective clothing, safety gloves, and eyewear.
Risk of burn injuries due to hot or cold components and pipelines.
Depending on the process medium, valve components, and pipelines may get very hot
or cold and cause burn injuries.
ÎAllow components and pipelines to cool down or heat up.
ÎWear protective clothing and safety gloves.
1.3 Notes on possible property damage
NOTICE
!
Risk of valve damage due to contamination (e.g. solid particles) in the pipeline.
The plant operator is responsible for cleaning the pipelines in the plant.
ÎFlush the pipelines before start-up.
ÎObserve the maximum permissible pressure for valve and plant.
Risk of valve damage due to unsuitable medium properties.
The valve is designed for a process medium with dened properties.
ÎOnly use the process medium specied for sizing the valve.

10 EB 8052 EN
Safety instructions and measures
NOTICE
!
Risk of leakage and valve damage due to excessively high or low tightening torques.
Observe the specied torques on tightening control valve components. Excessively tight-
ened torques lead to parts wearing out quicker. Parts that are too loose may cause leak-
age.
ÎObserve the specied tightening torques (uWA0029).
Risk of valve damage due to the use of unsuitable tools.
Certain tools are required to work on the valve.
ÎOnly use tools approved by SAMSON (uWA0029).
Risk of valve damage due to the use of unsuitable lubricants.
The lubricants to be used depend on the valve material. Unsuitable lubricants may cor-
rode and damage the valve surface.
ÎOnly use lubricants approved by SAMSON (see parts list).

EB 8052 EN 11

12 EB 8052 EN
Markings on the control valve
2 Markings on the control valve
2.1 Valve nameplate
6 8
12 13
10 11
14 15 16 17 18
1…5 9
SAMSON
20
19
Fig.1: Valve nameplate
1…5 PED (Pressure Equipment Directive), "Art. 4, Abs. 3"
ID of the notied body, uid group, and category
6 Type designation
8Material
9Year of manufacture
10 Valve size:
DIN: DN · ANSI: NPS· JIS: DN…A/B
11 Pressure rating:
DIN: PN · ANSI: CL · JIS: K
12 Order no. with modication index
For after-sales service orders: AA prex
13 Position in order
For after-sales service orders: conguration ID
14 Flow coefcient:
DIN: KVS · ANSI: CV · JIS: CV
15 Characteristic:
%: equal percentage · Lin: linear · NO/NC: quick opening
16 Seat-plug seal:
ME: metal (see section3.3)
HA: carbide metal
ST: Stellite® facing
KE: ceramic
PT: soft seal with PTFE
PK: soft seal with PEEK
17 Seat code (trim material) · On request
18 Pressure balancing:
DIN: D · ANSI: B · JIS: B
19 Flow divider:
1: ST1 · 3: ST3
AC trim:
AC-1 to AC-3
20 Country of origin

EB 8052 EN 13
Markings on the control valve
The nameplate (80) is afxed to the yoke of
the valve (see Fig.2).
80
Fig.2: Location of the nameplate
2.2 Actuator nameplate
See associated actuator documentation.
2.3 Material number
The seat and plug of the valves have an arti-
cle number written on them. Specifying this
article number, you can contact us to nd out
which material is used. Additionally, a seat
code is used to identify the trim material.
This seat code is specied on the nameplate
(17 on nameplate). For more details on the
nameplate, see section2.1.

14 EB 8052 EN
Design and principle of operation
3 Design and principle of oper-
ation
The single-seated Type3251 Globe Valve is
preferably combined with a SAMSON
Type3271 or Type3277 Pneumatic Actuator
(see Fig.3). It can also be combined with
other actuators.
The seat (4) and plug with plug stem (5) are
installed in the body (1). The plug stem is
connected to the actuator stem (A7) by the
stem connector clamps (A26) and is sealed
by a spring-loaded V-ring packing (15). The
springs in the pneumatic actuator (A) are lo-
cated either above or below the diaphragm
(A4) depending on the selected fail-safe ac-
tion (see section3.1). A change in the signal
pressure acting on the diaphragm causes the
plug to move. The actuator size is deter-
mined by the diaphragm area.
The medium ows through the valve in the
direction indicated by the arrow. A rise in
signal pressure causes the force acting on
the diaphragm in the actuator to increase.
The springs are compressed. Depending on
the selected direction of action, the actuator
stem retracts or extends. As a result, the plug
position in the seat changes and determines
the ow rate through the valve.
3.1 Fail-safe positions
The fail-safe position depends on the mount-
ed actuator.
Depending on how the compression springs
are arranged in the pneumatic actuator, the
valve has two different fail-safe positions:
Actuator stem extends (FA)
When the signal pressure is reduced or the
air supply fails, the springs move the actua-
tor stem downward and close the valve. The
valve opens when the signal pressure is in-
creased enough to overcome the force exert-
ed by the springs.
Actuator stem retracts (FE)
When the signal pressure is reduced or the
air supply fails, the springs move the actua-
tor stem upwards and open the valve. The
valve closes when the signal pressure is in-
creased enough to overcome the force exert-
ed by the springs.
The actuator's direction of action can be re-
versed, if required. Refer to the mounting
and operating instructions of the pneumatic
actuator:
uEB8310‑X for Type3271 and Type3277
Tip

EB 8052 EN 15
Design and principle of operation
1 Body
2 Bonnet
3Yoke
4 Seat
5 Plug (with plug stem)
8Threaded bushing
(packing nut)
9Stem connector nut
10 Lock nut
14 Nut
15 Packing
17 Body gasket
84 Travel indicator scale
92 Castellated nut
A Actuator
A4 Diaphragm
A7 Actuator stem
A8 Ring nut
A10 Spring
A16 Vent plug
A26 Stem connector clamps
S Signal pressure
connection
A16
A10
A4
S
A7
84
A26
9
10
8
92
3
2
5
4
A
A8
15
14
17
1
S
Fig.3: Type3251 Valve with Type3271 Pneumatic Actuator (left) and Type3277 Pneumatic
Actuator (right)

16 EB 8052 EN
Design and principle of operation
3.2 Versions
The modular design allows an insulating sec-
tion or metal bellows to be tted to the stan-
dard valve version.
Actuators
In these instructions, the preferable combina-
tion with a Type3271 or Type3277 Pneu-
matic Actuator is described. The pneumatic
actuator (with or without handwheel) can be
replaced by another pneumatic actuator in a
different size, but with the same travel.
ÎObserve the maximum permissible actu-
ator force.
If the travel range of the actuator is larger
than the travel range of the valve, the spring
assembly in the actuator must be preloaded
so that the travel ranges match. See associ-
ated actuator documentation.
The basic pneumatic actuator can be re-
placed by a pneumatic actuator with addi-
tional handwheel or by an electric actuator.
3.3 Technical data
The nameplates on the valve and actuator
provide information on the control valve ver-
sion. See section2.1 and the associated ac-
tuator documentation.
More information is available in Data Sheet
uT8052.
Compliance
The Type3251 Valve bears both the CE and
EAC marks of conformity.
Temperature range
Depending on the version, the control valve
is designed for a temperature range from
–10 to +220°C (14 to 428°F). The use of
an insulating section or bellows seal extends
the temperature range from –196 to
+550°C (–325 to +1022°F).
Leakage class
Depending on the version, the following
leakage class applies:
Seal (16 on
nameplate) ME, ST ME, ST PT, PK
Pressure balanc-
ing (18 on name-
plate)
–D/B –
Leakage class
(according to
ANSI/FCI70-2)
Min. IV Min. IV VI
Note
Note

EB 8052 EN 17
Design and principle of operation
Noise emission
SAMSON is unable to make general
statements about noise emission as it
depends on the valve version, plant facilities,
and process medium. On request, SAMSON
can perform calculations according to
IEC60534, Part8-3 and Part8-4 or
VDMA24422 (edition 89).
Risk of hearing loss or deafness due to loud
noise.
Wear hearing protection when working near
the valve.
WARNING
!

18 EB 8052 EN
Design and principle of operation
Dimensions and weights
Table1 to Table3 provide a summary of the dimensions and weights of the standard version
of Type3251 Valve. The lengths and heights in the dimensional drawings are shown on
p.19.
Table1: Dimensions of Type3251 Valve, up to NPS6
Valve NPS ½ 1 1½ 2 3 4 6
DN 15 25 40 50 80 100 150
Length L
(anges RF
and
welding
ends)
Class 150 in 7.25 7.25 8.75 10.00 11.75 13.88 17.75
mm 184 184 222 254 298 352 451
Class 300 in 7.50 7.75 9.25 10.50 12.50 14.50 18.62
mm 190 197 235 267 318 368 473
Class 600 in 8.00 8.25 9.88 11.25 13.25 15.50 20.00
mm 203 210 251 286 337 394 508
Class 900 in 8.50 10.00 12.00 14.50 15.00 18.00 24.00
mm 216 254 305 368 381 457 610
Class
1500
in 8.50 10.00 12.00 14.50 18.50 21.50 27.75
mm 216 254 305 368 470 546 705
Class
2500
in 10.38 12.12 15.12 17.75 22.75 26.50 36.00
mm 264 308 384 451 578 673 914
Height H4
Class 150
to 600
in 5.98 5.98 6.46 8.54 8.74 9.53 12.36
mm 152 152 164 217 222 242 314
Class 900 in 7.32 7.32 7.68 9.88 8.74 9.53 12.36
mm 186 186 195 251 222 242 314
Class
1500 to
2500
in 7.32 7.32 7.68 9.88 11.34 13.7 18.35
mm 186 186 195 251 288 348 466
H8 for
actuator
350cm² in 9.45 9.45 9.45 9.45 9.45 9.45 –
mm 240 240 240 240 240 240
355cm² in 9.45 9.45 9.45 9.45 9.45 9.45 16.46
mm 240 240 240 240 240 240 418
700cm² in 9.45 9.45 9.45 9.45 9.45 9.45 16.46
mm 240 240 240 240 240 240 418
750cm² in 9.45 9.45 9.45 9.45 9.45 9.45 16.46
mm 240 240 240 240 240 240 418

EB 8052 EN 19
Design and principle of operation
Valve NPS ½ 1 1½ 2 3 4 6
DN 15 25 40 50 80 100 150
H8 for
actuator
1000cm² in
–
11.61 11.61 11.61 16.46
mm 295 295 295 418
1400-
60cm²
in 11.61 11.61 11.61 16.46
mm 295 295 295 418
1400-
120cm²
in 18.90 18.90 18.90 19.80
mm 480 480 480 503
2800cm² in 18.90 18.90 18.90 19.80
mm 480 480 480 503
2x2800cm² in 18.90 18.90 18.90 19.80
mm 480 480 480 503
H2 (NPS4
and larger
with foot)
Class 150 in 1.97 2.36 3.05 3.54 3.94 6.3 8.66
mm 50 60 80 90 100 160 220
Class 300
to 600
in 2.36 2.76 3.54 3.94 4.72 7.09 9.25
mm 60 70 90 100 120 180 235
Class 900 in 2.76 3.05 3.94 4.33 4.72 7.09 9.25
mm 70 80 100 110 120 180 235
Class
1500
in 2.76 3.05 3.94 4.33 5.51 8.66 11.22
mm 70 80 100 110 140 220 285
Class
2500
in 2.95 3.54 4.33 4.72 6.3 9.33 12.6
mm 75 90 110 120 160 237 320
Dimensional drawings
H2
L
H4 H8
H2
L
H4 H8
Type3251 up to NPS3 without foot Type3251 in NPS4 and larger with foot

20 EB 8052 EN
Design and principle of operation
Table2: Dimensions of Type3251 Valve, NPS8 and larger
Valve NPS 8 10 12 14 16 20
DN 200 250 300 – 400 500
Length L
(anges RF
and
welding
ends)
Class 150 in 21.38 26.50 29.00 35.00 40.00 On request
mm 543 673 737 889 1016
Class 300 in 22.38 27.88 30.50 36.50 41.62 On request
mm 568 708 775 927 1057
Class 600 in 24.00 29.62 32.25 38.25 43.62 On request
mm 610 752 819 972 1108
Class 900 in 29.00 33.00 38.00 40.50 On request
mm 737 838 965 1029
Class
1500
in 32.75 39.00 44.50 49.50 On request
mm 832 991 1130 1257
Class
2500
in 40.25 On request –
mm 1022
Height H4
Class 150
to 600
in 15.24 17.401) 25.79 25.20 25.20 On request
mm 387 4421) 655 640 640
Class 900 in 15.24 20.432) 25.79 On request
mm 387 5192) 655
Class
1500 to
2500
in 22.44
On request Class 1500
On request
mm 570
H8 for
actuator
350cm² in –
mm
355cm² in –
mm
700cm² in 16.46 16.46 –
mm 418 418
750cm² in 16.46 16.46 –
mm 418 418