Samson 3271 Service manual

Translation of original instructions
EB 8052 EN
Edition July 2019
Type3251 Valve with Type3271 Actuator
Type3251 Valve · ANSI version
In combination with an actuator,
e.g. a Type3271 or Type3277 Pneumatic Actuator

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. The images shown in
these instructions are for illustration purposes only. The actual product may vary.
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
at www.samson.de > Service & Support > Downloads > Documentation.
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
EB 8052 EN

Contents
EB 8052 EN
1 Safety instructions and measures ................................................................1-1
1.1 Notes on possible severe personal injury ......................................................1-4
1.2 Notes on possible personal injury ................................................................1-4
1.3 Notes on possible property damage.............................................................1-6
1.4 Warnings on the device...............................................................................1-7
2 Markings on the device ..............................................................................2-1
2.1 Valve nameplate .........................................................................................2-1
2.2 Actuator nameplate.....................................................................................2-2
2.3 Material numbers........................................................................................2-2
2.4 Label when an adjustable packing is installed ...............................................2-2
3 Design and principle of operation ...............................................................3-1
3.1 Versions .....................................................................................................3-3
3.2 Additional ttings........................................................................................3-3
3.3 Valve accessories........................................................................................3-4
3.4 Technical data ............................................................................................3-4
4 Shipment and on-site transport ...................................................................4-1
4.1 Accepting the delivered goods .....................................................................4-1
4.2 Removing the packaging from the valve........................................................4-1
4.3 Transporting and lifting the valve..................................................................4-1
4.3.1 Transporting the valve .................................................................................4-2
4.3.2 Lifting the valve...........................................................................................4-3
4.4 Storing the valve.........................................................................................4-5
5 Installation.................................................................................................5-1
5.1 Installation conditions..................................................................................5-1
5.2 Preparation for installation...........................................................................5-2
5.3 Assembly ...................................................................................................5-3
5.3.1 Mounting the actuator onto the valve............................................................5-4
5.3.2 Installing the valve into the pipeline ..............................................................5-4
5.4 Testing the installed valve.............................................................................5-5
5.4.1 Leak test.....................................................................................................5-6
5.4.2 Travel motion..............................................................................................5-7

Contents
EB 8052 EN
5.4.3 Fail-safe position.........................................................................................5-7
5.4.4 Pressure test................................................................................................5-7
6 Start-up .....................................................................................................6-1
7 Operation..................................................................................................7-1
7.1 Working in closed-loop operation ................................................................7-2
7.2 Working in manual mode............................................................................7-2
8 Malfunctions ..............................................................................................8-1
8.1 Troubleshooting ..........................................................................................8-1
8.2 Emergency action .......................................................................................8-2
9 Servicing....................................................................................................9-1
9.1 Periodic testing ...........................................................................................9-3
9.2 Preparing the valve for service work.............................................................9-6
9.3 Mounting the valve after service work...........................................................9-6
9.4 Service work...............................................................................................9-6
9.4.1 Replacing the gasket ...................................................................................9-7
9.4.2 Replacing the packing.................................................................................9-7
9.4.3 Replacing the seat and plug.......................................................................9-11
9.5 Ordering spare parts and operating supplies ..............................................9-13
10 Decommissioning .....................................................................................10-1
11 Removal ..................................................................................................11-1
11.1 Removing the valve from the pipeline..........................................................11-2
11.2 Removing the actuator from the valve .........................................................11-2
12 Repairs ....................................................................................................12-1
12.1 Returning devices to SAMSON ..................................................................12-1
13 Disposal...................................................................................................13-1
14 Certicates...............................................................................................14-1
15 Appendix.................................................................................................15-1
15.1 Tightening torques, lubricants and tools ......................................................15-1
15.2 Spare parts ..............................................................................................15-1
15.3 After-sales service.....................................................................................15-3

EB 8052 EN 1-1
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 operating conditions that meet the spec-
i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 de-
vice 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 by the technical data
−Use outside the limits dened by the valve accessories connected to the 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. Ac-
cording 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.
Explosion-protected versions of this device must be operated only by personnel who has un-
dergone special training or instructions or who is authorized to work on explosion-protected
devices in hazardous areas.

1-2 EB 8052 EN
Safety instructions and measures
Personal protective equipment
We recommend checking the hazards posed by the process medium being used (e.g.
uGESTIS (CLP) hazardous substance database). Depending on the process medium and/or
the activity, the protective equipment required includes:
−Protective clothing, gloves, eye protection and respiratory protection in applications with
hot, cold and/or corrosive media
−Wear hearing protection when working near the valve
−Hard hat
−Safety harness when working at height
−Safety footwear, ESD (electrostatic discharge) footwear, if necessary
ÎCheck with the plant operator for details on further protective equipment.
Revisions and other modications
Revisions, conversions or other modications of the product are not authorized by SAMSON.
They are performed at the user's own risk and may lead to safety hazards, for example. Fur-
thermore, the product may no longer meet the requirements for its intended use.
Safety features
The fail-safe position of the control valve upon air supply or control signal failure depends on
the actuator used (see associated actuator documentation). When the valve is combined with
a SAMSON Type3271 or Type3277 Pneumatic Actuator, the valve moves to a certain fail-
safe position (see the 'Design and principle of operation' section) upon supply air or control
signal failure. 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.
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.
Hazards resulting from the special working conditions at the installation site of the valve must
be identied in a risk assessment and prevented through the corresponding safety instruc-
tions drawn up by the operator.

EB 8052 EN 1-3
Safety instructions and measures
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 specied hazard statements, warnings
and caution notes. Furthermore, the operating personnel must be familiar with the applicable
health, safety and accident prevention regulations and comply with them.
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. The 'Certicates' sec-
tion contains this declaration of conformity.
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 the mounted actuator, e.g. uEB8310-X for
Type3271 or Type3277 Pneumatic Actuator
−Mounting and operating instructions for mounted valve accessories (positioner, solenoid
valve etc.)
−uAB0100 for tools, tightening torques and lubricant

1-4 EB 8052 EN
Safety instructions and measures
1.1 Notes on possible severe personal injury
DANGER
!
Risk of bursting in pressure equipment.
Valves and pipelines are pressure equipment. Impermissible pressure or improper
opening can lead to valve components bursting.
ÎObserve the maximum permissible pressure for valve and plant.
ÎBefore starting any work on the control valve, depressurize all plant sections
affected as well as the valve.
ÎDrain the process medium from all the plant sections affected as well as the valve.
1.2 Notes on possible personal injury
WARNING
!
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.
Risk of hearing loss or deafness due to loud noise.
The noise emissions depend on the valve version, plant facilities and process medium.
ÎWear hearing protection when working near the valve.
Risk of personal injury due to exhaust air being vented.
While the valve is operating, the actuator or valve accessories may vent during closed-
loop control or when the valve opens or closes.
ÎInstall the control valve in such a way that vent holes are not located at eye level and
the actuator does not vent at eye level in the work position.
ÎUse suitable silencers and vent plugs.
ÎWear eye protection when working in close proximity to the control valve.

EB 8052 EN 1-5
Safety instructions and measures
WARNING
!
Crush hazard arising from moving parts.
The control valve contains moving parts (actuator and plug stem), which can injure
hands or ngers if inserted into the valve.
ÎDo not insert hands or nger into the yoke while the air supply is connected to the
actuator.
ÎBefore working on the control valve, disconnect and lock the pneumatic air supply
as well as the control signal.
ÎDo not impede the movement of the actuator and plug stem by inserting objects into
the yoke.
ÎBefore unblocking the actuator and plug stem after they have become blocked (e.g.
due to seizing up after remaining in the same position for a long time), release any
stored energy in the actuator (e.g. spring compression). See associated actuator
documentation.
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 affected and the
valve.
ÎWear protective clothing, safety gloves, respiratory protection and eye protection.

1-6 EB 8052 EN
Safety instructions and measures
WARNING
!
Risk of personal injury through incorrect operation, use or installation as a result of
information on the valve being illegible.
Over time, markings, labels and nameplates on the valve may become covered with dirt
or become illegible in some other way. As a result, hazards may go unnoticed and the
necessary instructions not followed. There is a risk of personal injury.
ÎKeep all relevant markings and inscriptions on the device in a constantly legible
state.
ÎImmediately renew damaged, missing or incorrect nameplates or labels.
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.
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.
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
tightened torques lead to parts wearing out quicker. Parts that are too loose may cause
leakage.
ÎObserve the specied tightening torques (uAB0100).
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AB0100).

EB 8052 EN 1-7
Safety instructions and measures
NOTICE
!
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 (uAB0100).
Risk of contamination of the process medium through the use of unsuitable lubricant
and/or contaminated tools and components.
ÎKeep the valve and the tools used free from solvents and grease.
ÎMake sure that only suitable lubricants are used.
1.4 Warnings on the device
Warning Meaning of the warning Location on the device
Warning against moving parts
There is a risk of injury to hands or ngers through the
stroking movement of the actuator and plug stem if they
are inserted into the yoke while the air supply is con-
nected to the actuator.

1-8 EB 8052 EN

EB 8052 EN 2-1
Markings on the device
2 Markings on the device
2.1 Valve nameplate
2019
1817
16
14 1513121110
8
76
4
5
2
1
Fig.2-1: Inscriptions on the valve nameplate
Fig.2-1 and the inscription table list all pos-
sible characteristics and options that may
appear on a valve nameplate. Only the in-
scriptions relevant to the ordered Type3251
Valve actually appear on the nameplate.
Note
Item Inscription meaning
1Data Matrix code
2Type designation
4 Material
5 Month and year of manufacture
6 Valve size:
DIN: DN · ANSI: NPS
7 Pressure rating:
DIN: PN · ANSI: CL
8Serial number Order number/item
10 Flow coefcient:
DIN: KVS · ANSI: CV
11 Characteristic:
%: equal percentage · LIN: linear
mod-lin: modified linear
NO/NC: on/off service
12 Seat-plug seal:
ME: metal · HA: carbide metal
ST: ST: metal base material with Stellite®
facing · KE: ceramic · PK: PEEK soft seal
13 Seat code (trim material): on request
14 Pressure balancing:
DIN: D · ANSI: B
Version:
M: mixing valve · V: flow-diverting valve
Item Inscription meaning
15 Noise reduction:
1:ow divider(ST)1 · 2:ST2 ·
3:ST3 · 1/PSA:ST1 standard and inte-
grated in seat for PSA valve
AC-1/AC-2/AC-3/AC-5:AC trim, versions
1 to 5
LK: perforated plug · LK1/LK2/LK3:perfo-
rated plug with ow divider ST1 to ST3 ·
MHC1:multi-hole cage
CC1:Combi Cage · ZT1:Zero Travel
16 Country of origin
17 PSA version:
PSA
18 Cage/seat style:
CC: clamped cage, clamped seat
SF: suspended cage, anged seat
FF: anged cage, anged seat
19 CE marking
20 ID of the notied body
PED: Pressure Equipment Directive
G1/G2: gases and vapors
Fluid group1= hazardous
Fluid group2= other
L1: liquids
Fluid group1= hazardous
Fluid group2= other
I/II/III: Category 1 to 3

2-2 EB 8052 EN
Markings on the device
The nameplate (80) is afxed to the yoke of
the valve (see Fig.2-2).
80
Fig.2-2: Nameplate position
2.2 Actuator nameplate
See associated actuator documentation.
2.3 Material numbers
The seat and plug of the valves have an item
number written on them. Specifying this item
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.
2.4 Label when an adjustable
packing is installed
An instructional label is afxed to the valve
when an adjustable packing is installed (see
Fig.2-3).
ATTENTION !
Adjustable packing
Stem packing is NOT tightened down.
Adjust carefully as required during start-up!
xxxx-xxxx
Fig.2-3: Label when an adjustable packing is
installed

EB 8052 EN 3-1
Design and principle of operation
3 Design and principle of oper-
ation
Refer to Fig.3-1.
The single-seated Type3251 Globe Valve is
preferably combined with a SAMSON
Type3271 or Type3277 Pneumatic Actua-
tor. It can also be combined with other actu-
ators.
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. A change in the signal pressure acting
on the diaphragm causes the plug to move.
The actuator size is determined by the dia-
phragm 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.
We recommend the use of positioners with
integrated diagnostic rmware (see sec-
tion3.3) for valves used for on/off service.
The partial stroke test included in this soft-
ware helps prevent a shut-off valve normally
in its end position from seizing up or getting
jammed.
Fail-safe positions
The fail-safe position of the control valve up-
on air supply or control signal failure de-
pends on the actuator used (see associated
actuator documentation).
Depending on how the compression springs
are arranged in the SAMSON Type3271
and Type3277 Pneumatic Actuator, the
valve has one of two different fail-safe posi-
tions:
−Actuator stem extends (FA)
When the signal pressure is reduced or
the air supply fails, the springs move the
actuator stem downward and close the
valve. The valve opens when the signal
pressure is increased enough to over-
come the force exerted by the springs.
−Actuator stem retracts (FE)
When the signal pressure is reduced or
the air supply fails, the springs move the
actuator stem upwards and open the
valve. The valve closes when the signal
pressure is increased enough to over-
come the force exerted 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
Tip

3-2 EB 8052 EN
Design and principle of operation
1Body
2Bonnet
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 Venting
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.3-1: Type3251 Valve with Type3271 Pneumatic Actuator (left) and Type3277 Pneumatic Actu-
ator (right)

EB 8052 EN 3-3
Design and principle of operation
3.1 Versions
With insulating section/bellows seal
The modular design allows an insulating sec-
tion or bellows seal to be tted to the stan-
dard valve version.
Actuators
In these instructions, the preferable combina-
tion with a SAMSON Type3271 or
Type3277 Pneumatic 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 an actuator with additional hand-
wheel, a pneumatic piston actuator or an
electric actuator (see Information Sheet
uT8300).
3.2 Additional ttings
Strainers
We recommend installing a SAMSON
strainer upstream of the valve. It prevents sol-
id particles in the process medium from
damaging the valve.
Bypass and shut-off valves
We recommend installing a shut-off valve
both upstream of the strainer and down-
stream of the valve and installing a bypass
line. The bypass line ensures that the plant
does not need to be shut down for service
and repair work on the valve.
Insulation
Control valves can be insulated to reduce
heat energy transfer.
Refer to the instructions in the 'Installation'
section.
Test connection
Versions with bellows seal tted with a test
connection (G
1
/
8
) at the top ange allow the
sealing ability of the bellows to be moni-
tored.
Particularly for liquids and vapors, we rec-
ommend installing a suitable leakage indica-
tor (e.g. a contact pressure gauge, an outlet
to an open vessel or an inspection glass).
Safety guard
For operating conditions, which require in-
creased safety (e.g. in cases where the valve
is freely accessible to untrained staff), a safe-
ty guard must be installed to rule out a crush
hazard arising from moving parts (actuator
and plug stem). Plant operators are responsi-
ble for deciding whether a guard is to be
used. The decision is based on the risk posed
by the plant and its operating conditions.
Note

3-4 EB 8052 EN
Design and principle of operation
Noise reduction
Trims with ow dividers can be used to re-
duce noise emission (see uT8081).
3.3 Valve accessories
Information Sheet uT8350
3.4 Technical data
The nameplates on the valve and actuator
provide information on the control valve ver-
sion. See the 'Markings on the device' sec-
tion.
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 can ex-
tend the temperature range from –196 to
+550°C (–325 to +1022°F) depending on
the properties of the materials used.
Leakage class
Depending on the version, the following
leakage class applies:
Seal (12 on
nameplate) ME, ST ME, ST PT, PK
Pressure
balancing (14 on
nameplate)
–D/B –
Leakage class
(according to
IEC60534-4)
Min. IV Min. IV VI
Noise emission
SAMSON is unable to make general state-
ments about noise emissions as they depend
on the valve version, plant facilities and pro-
cess medium.
Note

EB 8052 EN 3-5
Design and principle of operation
Dimensions and weights
Table 3-1 to Table 3-4 provide a summary of the dimensions and weights of the standard
version of Type3251 Valve. The lengths and heights in the dimension diagrams are shown
on page3-9.
Dimensions in mm · Weights in kg
Table 3-1: Dimensions of Type3251 Valve, up to NPS6
Valve NPS ½11½234 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

3-6 EB 8052 EN
Design and principle of operation
Valve NPS ½11½234 6
DN 15 25 40 50 80 100 150
H8 for ac-
tuator
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