Samson 3323 Manuale di servizio

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

2.1

141

192

199

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-

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)

Form C attachment (mounting using rods)

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

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