Samson 3214 Manuale di servizio

Electric Control Valves

Types 3214/3374, 3214/3274

Type 3214 Globe Valve balanced by a diaphragm

Mounting and

Operating Instructions

EB 5868-1 EN

Edition September 2006

Type 3214/3374

Type 3214 Globe Valve balanced by a diaphragm

Contents

1 Design and principle of operation . . . . . . . . . . . . . . . . . . . 4

1.1 Versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.2 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.1 Mounting position . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2 Strainer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.3 Additional mounting instructions. . . . . . . . . . . . . . . . . . . . . 7

3 Assembling valve and actuator . . . . . . . . . . . . . . . . . . . . . 8

4 Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5 Operation – manual override . . . . . . . . . . . . . . . . . . . . . 11

5.1 Opening isolating terminal 81 (Type 3274). . . . . . . . . . . . . . . 12

6 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

7 Dimensions in mm and weights . . . . . . . . . . . . . . . . . . . . 14

2EB 5868-1 EN

Contents

EB 5868-1 EN 3

General safety instructions

The control valve is to be mounted, started up or serviced by fully trained

and qualified personnel only, observing the accepted industry codes and

practices. Make sure employees or third persons are not exposed to any

danger.

All safety instructions and warnings in these mounting and operating in-

structions, particularly those concerning assembly, start-up, and mainte-

nance, must be observed.

The control valve fulfils the requirements of the European Pressure Equip-

ment Directive 97/23/EC. Valves with a CE marking have a declaration of

conformity that includes information about the applied conformity assess-

ment procedure. The declaration is available on request.

For appropriate operation, make sure that the control valve is only used in

areas where the operating pressure and temperatures do not exceed the op-

erating values that are based on the valve sizing data submitted in the or-

der.

The manufacturer does not assume any responsibility for damage caused by

external forces or any other external influence!

Any hazards that could be caused in the control valve by the process me-

dium, the operating pressure or by moving parts are to be prevented by

means of the appropriate measures.

Proper shipping and appropriate storage are assumed.

Note!

For installation and maintenance work on the control valve, make sure the rel-

evant section of the plant has been depressurized and, depending on the pro-

cess medium, drained as well. If necessary, allow the control valve to cool

down or heat up to reach ambient temperature prior to starting any work on

it.

The electric actuators have been designed for use in electrical power sys-

tems. Observe the relevant safety regulations for wiring and maintenance.

Only use power interruption devices that are protected against unintentional

reconnection of the power supply.

Take special care when making adjustments on live parts. Do not remove

covers!

1 Design and principle of

operation

Fig. 1

The control valves consist of a Type 3214

Globe Valve balanced by a diaphragm and

an electric or electrohydraulic actuator.

The medium flows through the globe valves

in the direction indicated by the arrow on

the valve body. The cross-sectional area of

flow between the seat (2) and plug (3) is de-

termined by the position of the plug stem.

The downstream pressure p2is applied to

the inside of the Type 3214 Valve; the up-

stream pressure p1acts on the outside. The

forces acting on the valve plug due to the

upstream and downstream pressures are

balanced by the diaphragm (4).

The plug is moved by changing the control

signal applied to the actuator. For the

Type 3374 Electric Actuator as well as the

Type 3274 Electrohydraulic Actuator, this

signal is a three-step signal or, when an ad-

ditional electric positioner is used, a continu-

ous 0 to 20 mA, 4 to 20 mA or 0 (2) to

10 V– signal.

The electric actuators can be equipped with

additional accessories.

1.1 Versions

Electric control valve with Type 3214 Globe

Valve balanced by a diaphragm

Type PN DN EB*

3214/3374-10

16 to 40 125 to

250

8331-1

3214/3274-12

8340

3214/3274-16

3214/3274-23 **

* For details on the actuators refer to the listed

mounting and operating instructions (EB).

** Type 3274-23 Actuator with fail-safe func-

tion: typetesting available on request

4EB 5868-1 EN

Design and principle of operation

p1p2

Type 3214/3274

p1p2

Type 3214/3374

1 Valve body

2 Seat

3 Plug

4 Balancing diaphragm

5 Rod-type yoke

6 Plug stem

7 Coupling nut

8 Actuator

9 Hex nut

10 Coupling nut

11 Adapter

12 Hex nut

EB 5868-1 EN 5

Design and principle of operation

Fig. 1 · Principle of operation: Type 3214/3374 (top) · Type 3214/3274 (bottom)

1.2 Technical data

6EB 5868-1 EN

Design and principle of operation

1. Type 3214 Globe Valve balanced by a diaphragm

Nominal size DN 125 150 200 250

Rated travel mm 30 30 30 30

KVS 230 340 620 750

Max. perm. diff. pressure Δp bar 12 12 10 10

Max. perm. temperature °C 150 (version for water) · 80 (version for non-flammable gases)

Materials · Material numbers according to DIN EN

Nominal pressure PN 16 PN 25 PN 40

Body EN-JL1040 or

EN-JS1049 or

1.0619

EN-JS1049 or

1.0619 1.0619

Valve seat Red brass

Plug Red brass with EPDM soft seal or PTFE soft seal

Pressure balancing EPDM balancing diaphragm

Gasket Graphite on metal core

2. Actuators

Type 3374-10 3274-12 3274-16 3274-23 1)

Safety function Without Without Without With

Rated travel mm 30 30 30 30

Transit time at rated travel s 240 2) 120 120 120 2)

Transit time for fail-safe action s–––43

Fail-safe action, actuator stem – – – Extends

Thrust kN 2.5 3.0 3.0 3.0

Power consumption VA Max. 18 Approx. 90 Approx. 90 Approx. 90

Manual override Mechanical Electrical Mechanical Electrical

Electrical connection 24 V, 50 Hz

230 V, 50 Hz

110 V, 60 Hz 230/110/24 V, 50/60 Hz

Perm. ambient temperature 5 to 60 °C –10 to 60 °C

Type of protection IP 54 3) IP 65

1) Typetesting on request 2) Shorter transit times on request 3) IP 65 with cable gland

2 Installation

2.1 Mounting position

Install the valve in upright position into a

horizontal pipeline. Make sure the direction

of flow corresponds to the arrow on the

valve body.

Make sure you choose a place of installation

that allows you to freely access the valve

even after the entire plant has been com-

pleted.

Install a strainer upstream of the valve to

prevent that any sealing parts, weld spatter,

and other impurities carried along by the

process medium impair the proper function-

ing of the valve, above all the tight shut-off.

Note!

Make sure the valve body is mounted free of

stress and not exposed to excessive vibra-

tion. If necessary, support the piping near

the connections.

Flush the pipeline thoroughly before installa-

tion.

2.2 Strainer

Install the strainer upstream of the control

valve. Make sure the direction of flow corre-

sponds to the arrow on the valve body.

The filter element must be vertically sus-

pended. Remember to leave enough space

to remove it.

2.3 Additional mounting instruc-

tions

We recommend to install a hand-operated

shut-off valve both upstream of the strainer

and downstream of the valve to be able to

shut down the plant for cleaning and main-

tenance, and when the plant is not used for

longer periods of time.

EB 5868-1 EN 7

Installation

3 Assembling valve and

actuator

If the valve and actuator have not already

been assembled by the manufacturer, or if

the original actuator of a control valve is to

be replaced by a different type or size, re-

move the transport protection and proceed

as described below.

Type 3374 Actuator (Fig. 1, top)

1. Use the manual override (see section 5)

to slightly retract the actuator stem into

the actuator.

2. Place the actuator onto the valve body

and tighten the hex nut (12) using a

tightening torque of at least 100 Nm

(width across flats SW 36).

3. Place the coupling nut (7) over the ends

of the actuator stem and the plug stem

and tighten using the two hex nuts.

Type 3274 Actuator (Fig. 1, bottom)

Required rod-type yoke: order no.

1400-8822

1. Place the rod-type yoke (5) onto the

valve body and tighten the hex nut (12)

using a tightening torque of at least

100 Nm.

2. Attach the adapter (11) to the plug stem

(∅10 mm) using the coupling nut (7).

3. Place the actuator onto the rod-type

yoke (5) and tighten using the hex

nut (9).

4. Pull the adapter up to the actuator stem.

Mount the coupling nut (10) and tighten

using the hex nuts.

4 Electrical connections

Upon installation of the electrical con-

nections, observe the regulations con-

cerning electrical power plant systems

according to DIN VDE 0100 as well as

the regulations of your local power

supplier.

Use a suitable power supply, which

guarantees that no dangerous voltages

are applied to the device in standard

operation or when the plant or parts of

the plant fail.

Caution!

Only connect the device to the main

power network when the power is

switched off.

Only use power interruption devices

that are protected against unintentional

reconnection of the power supply.

Particularly for 24 V, 50 Hz actuators,

use wires with a sufficiently large

cross-section to guarantee that the per-

missible voltage tolerances of

10 %

are not exceeded.

Additional electrical equipment

The actuators can be equipped with limit

switches, potentiometers or positioners for

input signals from 4 or 0 to 20 mA, or 2 or

0 to 10 V.

For details refer to

mounting and operating instructions EB …

Type 3374 –> EB 8331-1 EN

Type 3274 –> EB 8340 EN

8EB 5868-1 EN

Assembling valve and actuator

Type 3374 Actuator

1. Remove the housing cover.

2. Route the connecting cables through the

cable entries onto the terminals and fas-

ten them.

Connect the control signals of the con-

troller to the connections eL and aL:

4If voltage is applied to eL, the actua-

tor motor retracts the actuator stem

into the actuator (”Actuator stem re-

tracts“).

4If voltage is applied to aL, the actu-

ator stem is extended (”Actuator

stem extends“).

Actuators operated in parallel must be

controlled using separate contacts as us-

ing one common on/off contact can

cause the actuators to oscillate in the end

positions.

3. Remount the housing cover.

EB 5868-1 EN 9

Electrical connections

aL eL N NL

N+–LN

Ce Ce

41 44 42 51 54 52 81 82 83 91 92 93

Fig. 2 · Electrical connection of Type 3374-10 with three-step signal

retracts

extends

Magnet in version with fail-safe function

(not Type 3374-10)

Potentiometer (optional)

Type 3274 Actuator

1. Remove the housing cover on the side.

2. Route the connecting cables through the

cable entries on the housing onto the ter-

minals and fasten them.

Voltage must always be applied to termi-

nals N and L. If no supply voltage is ap-

plied, the actuators will remain in their

last position. Actuators with fail-safe

function will move to their fail-safe posi-

tion.

3. Connect grounding conductors to the

separate grounding conductor terminals

on the inside of the housing.

4. Remount the housing cover.

Fuse:

The PCB of the motor’s electronics includes a

bracket with a 5 x 20 mm glass tube fuse:

for 230 V, 50 Hz = T 1 (1 A, time-lag)

for 110 V, 50 Hz = T 1.25 (1.25 A, time lag)

for 24 V, 50 Hz = T 6.3 (6.3 A, time-lag)

10 EB 5868-1 EN

Electrical connections

NLaL eL a43 e53 81 1.311.32 1.33 2.312.32 2.33

eaae

"e" "a"

PE NL

3274-11...-18,-21,-23

3274-13,-14,-17,-18,-22

Fig. 3 · Electrical connection of Type 3274 with three-step signal

Safety interlock circuit,

only for Type 3274-2x

Controller

Note!

The controller output relays used to control the

input signals aL (stem extends) and eL (stem

retracts) must be operated and connected

using terminal 81 (same potential) only.

Heating resistor

Retracts Extends

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