Samson 3347-1 Service-Handbuch

Translation of original instructions

EB 8097 EN

Type3347-7, cast body with welding

ends

Type3347-7, bar stock body with

threaded connections

Edition May 2016

Type3347-1 and Type3347-7 Pneumatic Control Valves

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

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

2 EB 8097 EN

Contents

EB 8097 EN 3

1 General safety instructions.............................................................................4

2 Design and principle of operation ..................................................................6

3 Assembling valve and actuator ......................................................................9

3.1 Assembly and adjustment ...............................................................................9

3.2 Option of preloading springs for "actuator stem extends"................................10

3.3 Different rated travels of valve and actuator ...................................................10

4 Installation..................................................................................................11

4.1 Notes on installation ....................................................................................11

4.2 Signal pressure line ......................................................................................11

5 Operation...................................................................................................11

6 Maintenance ...............................................................................................12

6.1 Replacing sealing parts and plug ..................................................................12

7 Description of nameplates............................................................................14

8 Inquiries .....................................................................................................15

4 EB 8097 EN

General safety instructions

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 ex-

posed to any danger. All safety instructions and warnings given in these

mounting and operating instructions, particularly those concerning installa-

tion, start-up and maintenance, must be strictly observed.

−The control valves comply with the requirements of the European Pressure

Equipment Directive 2014/68/EU. Valves with a CE marking have a

declaration of conformity which includes information about the applied

conformity assessment procedure.

The declaration of conformity can be viewed and downloaded at

http://www.samson.de.

−To ensure appropriate use, only use the valve in applications where the op-

erating pressure and temperatures do not exceed the specications used

for sizing the valve at the ordering stage. The manufacturer does not as-

sume any responsibility for damage caused by external forces or any other

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.

−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 as

well as the control signal are disconnected to prevent any hazards caused

by moving parts.

−Be particularly careful if the actuator springs are preloaded. Such actua-

tors are labeled correspondingly and can also be identied by three long

bolts protruding from the bottom of the actuator. Before starting any work

on the valve, relieve the compression from the preloaded springs.

EB 8097 EN 5

General safety instructions

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).

6 EB 8097 EN

Design and principle of operation

2 Design and principle of oper-

ation

The Type3347 Angle Valve can be com-

bined with either a Type3271 Pneumatic

Actuator or a Type3277 Pneumatic Actuator

with integral positioner attachment.

The standard valve body is designed for

welding into pipelines. Other versions can

be equipped with threaded or anged ends,

or clamp connections.

The control valve is tted with an easily de-

tachable clamp connection between valve

body and bonnet. The body free of dead

space is suitable for CIP (Cleaning-In-Place).

The control valves are mainly designed for

use as control or on/off valves in the food

industry.

The medium ows through the valve in the

direction indicated by the arrow. The plug

(3) is moved by changing the signal pressure

acting on the diaphragm of the actuator.

The plug stem (6) with plug (3) and actuator

stem (8.1) are connected by the stem con-

nector (7) and sealed by a PTFE seals (5.1

and 5.3).

In the special version with steam line connec-

tion, an additional spring-loaded PTFE ring

packing (4.2) is used. In this case, the plug

stem can be cleaned through the connection

of a steam line.

Fail-safe position

Depending on how the compression

springs(8.3) are arranged in the actuator,

the valve has two different fail-safe positions:

−Actuator stem extends: 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 overcome the

force exerted by the springs.

−Actuator stem retracts: when the signal

pressure is reduced or the air supply

fails, the springs move the actuator stem

upward and open the valve.

The valve closes when the signal pressure

is increased enough to overcome the

force exerted by the springs.

Legend for Fig.1

1 Valve body

1.1 Centering ring

1.2 Body gasket

1.3 Compensating ring

3 Plug

4.1 Spring (special version)

4.2 Packing (special version)

4.3 Washers (special version)

5 Valve bonnet

5.1 Stem seal

5.2 Body and stem seal

5.3 Wiper ring

5.4 Clamp

5.5 Travel indicator scale

6 Plug stem

6.1 Stem connector nut

6.2 Lock nut

7 Stem connector

8 Actuator

8.1 Actuator stem

8.2 Ring nut

8.3 Compression springs

9Signal pressure

connection

10 Compression-type tting

EB 8097 EN 7

Design and principle of operation

6.1

6.2

1.3

8.3

8.2

8.1

5.5

5.3

5.4

5.2

8.1

8.2

4.2

5.1

5.4

1.2

1.1

4.3

6.2

5.3

4.1

4.3

Special version with steam line connection

Version with cast body

Type3277 ActuatorType3271 Actuator

Fig.1: Sectional drawings

8 EB 8097 EN

Design and principle of operation

Compliance

The Type3347 Valve bears the EAC mark of

conformity:

EB 8097 EN 9

Assembling valve and actuator

3 Assembling valve and actua-

tor

The basic pneumatic actuator can be re-

placed by a pneumatic actuator with addi-

tional handwheel or by an electric actuator.

The standard pneumatic actuator can be re-

placed by a smaller or larger actuator for all

nominal valve sizes.

If the travel range of the actuator is larger

than the travel of the valve, the springs in the

actuator are preloaded by SAMSON so that

the travel ranges match.

3.1 Assembly and adjustment

Proceed as follows if the valve and actuator

have not been assembled by SAMSON or if

the actuator is to be replaced by an actuator

of another type or size:

1. Loosen the lock nut (6.2) and stem con-

nector nut (6.1) on the valve. Firmly

press the plug together with the plug

stem into the seat. Thread down the lock

nut and stem connector nut.

2. Remove the clamps of the stem connector

(7) and the ring nut (8.2) from the actua-

tor (8).

3. Slide the ring nut over the plug stem.

4. Place the actuator onto the valve bonnet

(5) and secure it with the ring nut (8.2).

5. Read the bench range (e.g.0.2 to 1bar)

and the actuator's fail-safe action (e.g.

"actuator stem extends") from the actua-

tor's nameplate.

The fail-safe action "actuator stem ex-

tends" or "actuator stem retracts" is

marked by FA or FE on the Type3271

Actuator, and by a corresponding sym-

bol on the nameplate of the Type3277

Actuator.

The lower value corresponds to the lower

bench range value to be adjusted,

whereas the upper value corresponds the

upper bench range value.

During assembly, make sure that the stem

seal (5.1) is not damaged.

The maximum possible actuator travel must

not exceed the maximum permissible valve

travel (see adhesive label on the yoke).

6. For actuators with "actuator stem ex-

tends" fail-safe action, apply a signal

pressure that corresponds to the lower

bench range value (e.g. 0.2 or 0.4bar)

to the connection on the bottom dia-

phragm chamber.

For actuators with "actuator stem re-

tracts" fail-safe action, apply a signal

pressure that corresponds to the upper

bench range value (e.g. 1bar) to the

connection on the top diaphragm cham-

ber.

7. Screw on the stem connector nut (6.1) by

hand until it touches the actuator stem

(8.1). Turn it a further ¼turn and secure

this position with the lock nut (6.2)

8. Position clamps of the stem connector (7)

and screw them tight.

NOTICE

10 EB 8097 EN

Assembling valve and actuator

9. Align travel indicator scale (5.5) with the

tip of the stem connector; for actuators

with fail-safe action "actuator stem ex-

tends" align it with lower marking (valve

closed) and for actuators with fail-safe

action "actuator stem retracts" align it

with top marking (valve open).

Note on removing an actuator

When removing an actuator with "stem ex-

tends" fail-safe action from a valve and es-

pecially an actuator with preloaded springs,

apply a signal pressure that is slightly higher

than the lower bench range value (see actu-

ator nameplate) to the lower signal pressure

connection to allow the ring nut (8) to be

loosened.

3.2 Option of preloading

springs for "actuator stem

extends"

To achieve a greater positioning force, the

springs of the actuators can be preloaded by

up to 25% of their travel or their bench

range.

When a preload of, e.g. 0.1bar, is desired

for a bench range of0.2 to 1bar, the lower

bench range value is shifted by 0.1bar to

0.3bar (0.1bar correspond to a preload of

12.5%).

When adjusting the valve, set the lower

bench range value to 0.3bar. Write the new

bench range with preloaded springs of 0.3

to 1.1bar on the nameplate.

3.3 Different rated travels of

valve and actuator

Actuators that have already been preloaded

by the manufacturer without mounting the

valve are labeled correspondingly. Addition-

ally, they can be identied by three longer

bolts with nuts protruding from the bottom

diaphragm case.

Always use actuators with preloaded springs

when the valve's rated travel is smaller than

the rated travel of the actuator.

GEFAHR

!WARNING

NOTICE

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