Samson 3310/AT, 3278, 3310 Mounting And Operating Instructions

Translation of original instructions

EB 8222 EN

Type3310/3278 with positioner

Type3310/AT

Edition December 2016

Type3310/AT and Type3310/3278 Pneumatic Control Valve

Type3310 Segmented Ball Valve

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.

Î For the safe and proper use of these instructions, read them carefully and keep them for

later reference.

Î If you have any questions about these instructions, contact SAMSON‘s After-sales Service

Department ([e-mail]).

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 8222 EN

Contents

EB 8222 EN 3

1 General safety instructions .............................................................................5

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

2.1 Fail-safe position ............................................................................................6

2.1.1 TypeSRP (single-acting version) ......................................................................6

2.1.2 TypeDAP (double-acting version) ....................................................................8

3 Mounting ......................................................................................................8

3.1 Assembling valve and actuator .......................................................................8

3.1.1 Type3310-SRP ..............................................................................................8

3.1.2 Type3310/3278 ...........................................................................................9

3.2 Mounting position ........................................................................................11

3.3 Signal pressure connection ...........................................................................11

4 Operation ...................................................................................................12

4.1 Changing the fail-safe action ........................................................................12

5 Servicing.....................................................................................................12

5.1 Removing the actuator from the valve ............................................................12

5.2 Replace the packing .....................................................................................12

5.3 Replacing the seat ring seal ..........................................................................13

5.4 Assembly ....................................................................................................13

5.5 Replacing the segmented ball, shafts and bearings .........................................15

5.5.1 Disassembly ................................................................................................15

5.5.2 Assembly ....................................................................................................15

6 Changing the characteristic ..........................................................................17

7 Tools and tightening torques ........................................................................18

7.1 Special tools ................................................................................................18

7.2 Tightening torques ........................................................................................19

7.2.1 Tightening torques for ange bolts .................................................................19

8 Nameplate ..................................................................................................21

9 Accessories .................................................................................................22

10 Technical data .............................................................................................23

11 Customer inquiries ......................................................................................23

4 EB 8222 EN

EB 8222 EN 5

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 exposed to
any danger.

− All safety instructions and warnings given in these mounting and operating
instructions, particularly those concerning installation, 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 uhttp://www.samson.de.

− To ensure appropriate use, only use the valve in applications where the oper-
ating 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 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 prevent­ed by taking appropriate precautions.

− Proper shipping and storage are assumed.

− For installation and maintenance, make sure the relevant section of the pipe-
line 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.

6 EB 8222 EN

Design and principle of operation

2 Design and principle of oper-

ation

The pneumatic control valve consists of the
Type3310 Segmented Ball Valve and either
the SAMSON PFEIFFER TypeAT or the
SAMSON Type3278 Pneumatic Rotary
Actuator.

The control valve is designed for both
throttling and on/off service in process
engineering and plants with industrial
requirements. The control valve is suitable for
liquids, vapors and gases at temperatures
from –29 to +220°C and pressure rating of
Class150 and 300.

The segmented ball valve in valve sizes
NPS1 to 12 is available with a soft-seated
or metal-seated ball. The version used is
marked on the nameplate of the valve body
(see section8).

The process medium ows through the valve.
The signal pressure applied to the rotary ac-

tuator determines the position (opening an­gle) of the segmented ball (8) and thus the
cross-sectional area of ow between the ball
and body (1). The actuator motion is trans­mitted to the segmented ball valve by a shaft
with square or key drive. The valve shaft (4)
is sealed by a self-adjusting PTFE V-ring
packing (2.3).

2.1 Fail-safe position

2.1.1 TypeSRP (single-acting
version)

The fail-safe position of the control valve up­on supply air (signal pressure) failure is de­termined in Type3310/AT (TypeSRP sin­gle-acting version) by the version used and
in Type3310/3278 by how the rotary actu­ator is mounted to the valve.

1 Body
2 Packing gland

2.1 Bearing bushing

2.2 Screws

2.3 V-ring packing

2.4 Washer

2.5 Spring

2.6 Washer

2.7 Spacer
3 Yoke

3.1 Screws
4 Shaft

4.1 Bearing bushing

4.2 Key drive

4.3 Snap ring
5 Support shaft

5.1 Bearing bushing

5.2 Threaded pin

5.3 Clamping bolt

5.4 Locking pins
8 Segmented ball
10 Bottom ange

10.1 Flange gasket

10.2 Flange ring

10.3 Flange bolts
11 Retainer

11.1 Screw

11.2 Washer

11.3 Gasket

11.4 Washer

11.5 Metal tubular seal

11.6 Seat ring (metal)

11.7 Support ring

11.8 Seat ring (PTFE)
12 Type AT Actuator

12.1 Stop bolt

12.2 Stop bolt
13 Type3278 Actuator

13.1 Stop bolt

13.2 Stop bolt

EB 8222 EN 7

Design and principle of operation

12.112

13.2

13.1 13

2

2.2

2.1

1

11.3

5.4

5.3

5.1

5.2

5

8

4.1

4.3

4

2.5

2.6

2.7

2.4

2.3

3.1
3

12.2

4.2

4

10 10.1 10.3 10.2

11.1

11.2

11.4

11.5

11.6

11.7

11.8

11

A

SAMSON PFEIFFER TypeAT Actuator

SAMSON Type3278 Actuator

Detail A (seal) is shown in Fig.3.

Note

Fig.1: Sectional drawing of Type3310 Valve

8 EB 8222 EN

Mounting

Fail-close

When the pressure is relieved from the
rotary actuator or the supply air fails, the
actuator springs close the valve. The valve
opens opposing the force of the actuator
springs when the signal pressure increases.

Fail-open

When the pressure is relieved from the
rotary actuator or the supply air fails, the
actuator springs open the valve. The valve
closes opposing the force of the actuator
springs when the signal pressure increases.

2.1.2 TypeDAP (double-acting
version)

The TypeDAP Rotary Actuator (double-act­ing) has no springs. A dened nal position
is not reached when the supply air fails.

3 Mounting

3.1 Assembling valve and
actuator

3.1.1 Type3310-SRP

Proceed as follows if the valve and actuator
have not been assembled by SAMSON:

In the standard actuator version (SRP =

single-acting with spring return mechanism),
the spring return mechanism is designed to
close clockwise when there is no signal
pressure.
If you require a different direction of rotation

or a double-acting actuator (DAP = double-

acting without spring return mechanism), this

specication must be submitted on ordering

the actuator.

Table1: Type3310-SRP

Fail-safe
position

Springs Characteristic

Fail-close Clockwise Equal percentage
Fail-close Counterclockwise Linear
Fail-open Clockwise Linear
Fail-open Counterclockwise Equal percentage

The square drive allows the actuator to be
mounted on the segmented ball valve offset
at angles of 90° in such a way that it is ei­ther in the upright or horizontal position to
meet the installation requirements.

Note