Samson 3323 Service manual

Mounting and
Operating Instructions
EB 8113/8114 EN
Series V2001
Type 3323 Three-way Valve
Edition August 2013

2 EB 8113/8114 EN
Denition of signal words
DANGER!
Hazardous situations which, if not
avoided, will result in death or seri-
ous injury
WARNING!
Hazardous situations which, if not
avoided, could result in death or se-
rious injury
NOTICE
Property damage message or mal-
function
Note:
Additional information
Tip:
Recommended action


1 General safety instructions.............................................................................5
2 Design and principle of operation ..................................................................6
3 Installation....................................................................................................8
3.1 Assembling valve and actuator .......................................................................8
3.2 Mounting position........................................................................................10
3.3 Strainer, bypass ...........................................................................................10
3.4 Arrangement of the valve .............................................................................10
4 Operation...................................................................................................10
5 Maintenance – Replacing parts ....................................................................12
5.1 Removing the actuator..................................................................................12
5.2 Replacing the packing..................................................................................14
5.2.1 Standard valve bonnet .................................................................................14
5.2.2 Insulating section .........................................................................................16
5.3 Replacing the seat and/or plug.....................................................................17
5.3.1 Valves in DN 15 and 25...............................................................................17
5.3.2 Valves in DN 32 to 100................................................................................18
5.4 SAMSON seat wrench and tightening torques ..............................................22
6 Description of the nameplate .......................................................................23
7 Dimensions .................................................................................................23
8 Customer inquiries ......................................................................................23
Contents
EB 8113/8114 EN 3

1 General safety instructions
−The control valve must be mounted, started up or serviced by fully trained
and qualied personnel only; the accepted industry codes and practices are
to be observed. Make sure employees or third persons are not exposed to
any danger.
All safety instructions and warnings given in these mounting and operating
instructions, particularly those concerning installation, start-up and mainte-
nance, must be strictly observed.
−The control valves comply with the requirements of the European Pressure
Equipment Directive 97/23/EC. Valves with a CE marking have a declara-
tion of conformity which includes information about the applied conformity
assessment procedure. The declaration of conformity is available on re-
quest.
−To ensure appropriate use, only use the control valve in applications where
the operating pressure and temperatures do not exceed the specications
used for sizing the valve at the ordering stage. The manufacturer does not
assume any responsibility for damage caused by external forces or any oth-
er external factors.
Any hazards that could be caused in the valve by the process medium, the
operating pressure, the signal pressure or by moving parts are to be pre-
vented by taking appropriate precautions.
−Proper shipping and storage are assumed.
WARNING!
−For installation and maintenance, make sure the relevant section of the
pipeline is depressurized and, depending on the process medium, drained
as well. Depending on the eld of application, allow the valve to cool down
or heat up to reach ambient temperature before starting any work on it.
−When working on the valve, make sure that the pneumatic air supply or
power supply as well as the control signal are disconnected to prevent any
hazards due to moving parts.
−Be particularly careful if the actuator springs of pneumatic control valves
are preloaded. Such actuators are labeled correspondingly and can also be
identied by three long bolts protruding from the bottom of the actuator. Be-
fore starting any work on the valve, relieve the compression from the pre-
loaded springs.
EB 8113/8114 EN 5
General safety instructions

2 Design and principle of oper-
ation
Fig. 1
The Type3323 Three-way Valve has a mod-
ular design and can be combined with pneu-
matic or electric actuators (as described in
the next section).
Depending on the plug arrangement, the
three-way valve can be used for either mix-
ing or diverting service.
In mixing valves, the process media to be
mixed enter at valve ports Aand B. The
combined ow exits the valve at port AB.
In diverting valves, in contrast, the process
medium enters at the valve port AB and the
partial ows exit at ports Aand B.
The ow rate from ports A or B to AB and
vice versa depends on the cross-sectional ar-
ea of ow between the seats and plugs.
The plug (5, 199) is moved by changing the
control signal applied to the actuator. The
plug stem (36) is sealed by a spring-loaded
PTFE V-ring packing (16) and is connected
to the actuator stem by the stem connector.
6 EB 8113/8114 EN
Design and principle of operation

7
35
2
14
2.1
17
4
AB
141
B
40
192
74
199
75
A
5
74
36
11
12
8
16
54
59
36
5
4
74
75
74
141
199
2 Valve bonnet
2.1 Flange
4 Seat
5 Plug
7 Stem connector
8 Threaded bushing
11 Spring
12 Washer
14 Nut
16 Packing
17 Body gasket
35 Nut
36 Plug stem
40 Self-locking nut
54 Nut
59 Crossbeam
74 Pipe
75 Pipe (short)
141 Seat
192 Retaining washer
199 Plug
Fig. 1: Type 3323 as mixing valve in DN 32/50; detailed drawing (right) showing the plug
arrangement of diverting valve
EB 8113/8114 EN 7
Design and principle of operation

3 Installation
3.1 Assembling valve and ac-
tuator
The valve and actuator are delivered sepa-
rately and must be assembled on site.
There are different ways to assemble the
valve and actuator depending on the actua-
tor model and the nominal size.
The following tables show the actuators that
can be used and the associated instructions.
Types 3371, 3372, 5824 and 3374 Actua-
tors on Type3323 Valve up to DN 50
(NPS2), Fig. 3
Form B attachment (mounting using a central
nut) is performed according to the associat-
ed Mounting and Operating Instructions.
Actuator For control
valve
Associated
instructions
Type
3371
Type 3323-PP uEB 8317 EN
Type
3372
Type 3323-IP uEB 8313-1 EN
uEB 8313-3 EN 1)
Type
5824
Type 3323-E1 uEB 5824-1 EN
uEB 5824-2 EN 2)
Type
3374
Type 3323-E3 uEB 8331-3 EN
uEB 8331-4 EN 2)
1) Version with Type 3725 Positioner
2) Version with integrated positioner
Types 3371 and 3372 Actuators on
Type3323 Valve in DN 65 (NPS 2½) and
larger, Fig. 3
Form C attachment (mounting using rods) is
performed according to the associated
Mounting and Operating Instructions.
Actuator For control
valve
Associated
instructions
Type 3371 Type 3323-
PP
uEB 8317 EN
Type 3372 Type 3323-IP uEB 8313-1 EN
uEB 8313-3 EN 1)
1) Version with Type 3725 Positioner
Type 3374 Actuator on Type 3323 Valve in
DN 65 (NPS 2½) and larger, Fig. 2
1. Place the actuator yoke on the valve bon-
net and fasten using two M8 hexagon
socket screws.
2. Extend the actuator stem using the manu-
al override until the actuator stem touch-
es the plug stem.
3. Position the clamps of the stem connector
and fasten with screws.
Fig. 2: Type 3374 in DN 65 and larger
8 EB 8113/8114 EN
Installation

Form B attachment (mounting using a central nut)
33
35
59
54
Form C attachment (mounting using rods)
7
33
60
2
54
2 Valve bonnet
7 Stem connector
33 Rods
35 Nut
54 Nut
59 Crossbeam
60 Plate
Fig. 3: Form B attachment (mounting using a central nut) and Form C attachment (mounting using
rods)
EB 8113/8114 EN 9
Installation

3.2 Mounting position
The valve can be mounted in any desired
position. However, the restrictions for the ac-
tuator used must be strictly observed.
NOTICE
Install the valve free of stress and
with the least amount of vibrations as
possible.
If necessary, support the pipelines
near the connections.
Since sealing parts, weld spatter and
other impurities carried along by the
medium may impair the tight shut-
off of the seat and plug, ush out the
pipeline thoroughly before installing
the valve in the pipeline.
Pipeline routing
To ensure that the control valve functions
properly, the pipeline must be straight and
without any manifolds or disturbances for a
distance of at least 6times the valve size
(DN) upstream and downstream of the valve.
Contact SAMSON if this distance cannot be
observed.
3.3 Strainer, bypass
We recommend to install a SAMSON Type 2
Strainer upstream of the valve, and upstream
of both inlet ports in mixing valves.
We recommend installing a shut-off valve
both upstream of the strainer and down-
stream of the valve to ensure that the plant
does not need to be shut down for mainte-
nance. In addition, install a bypass line.
3.4 Arrangement of the valve
Install the valve as shown in Fig. 4 depend-
ing on whether it is to be used for mixing or
diverting service.
Fail-safe action: the valve shuts off the ow
of the heating medium or opens the ow of
the cooling medium.
The plug arrangement (i.e. either mixing or
diverting valve) is indicated on a label at-
tached to the valve body.
4 Operation
The operating instructions only apply in con-
junction with the actuator. Refer to the corre-
sponding Mounting and Operating Instruc-
tions.
10 EB 8113/8114 EN
Operation