Burkert 6520 NARMUR Manual de usuario

Operating Instructions

Bedienungsanleitung

Instructions de Service

Type 6520 NAMUR

Valve with 24 V connection

Ventil mit 24 V-Anschluß

Vanne avec raccordement 24 V

We reserve the right to make technical changes without notice.

Technische Änderungen vorbehalten.

Sous resérve de modification techniques.

Operating Instructions 0606/10_EU-ML_00800608

6520 - 1

Type 6520 NAMUR Valve with 24 V connection

CONTENTS

1 GENERAL NOTES .......................................................................................................................................... 2

1.1 Symbols ......................................................................................................................................... 2

1.2 General Safety instructions .................................................................................................. 2

2 GENERAL DESCRIPTION ......................................................................................................................... 3

2.1 Type 6520 NAMUR Valve with 24 V connection ......................................................... 3

3 GENERAL TECHNICAL DATA ................................................................................................................ 4

3.1 Type 6520 NAMUR with 24 V connection ..................................................................... 4

3.2 Valve construction ................................................................................................................... 4

3.3 Operation .................................................................................................................................... 5

3.4 Medium......................................................................................................................................... 5

4 INSTALLATION AND COMMISSIONING OF THE VALVE .................................................... 6

4.1 Mounting the valve / pneumatic position indicator ..................................................... 7

4.2 Measures to be taken before commissioning ................................................................ 7

4.3 Electrical connection of the Type 6520 NAMUR valve with the 24 V

connection .................................................................................................................................. 8

5 FAULTS.................................................................................................................................................................. 9

2 - 6520

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To ensure that the device functions correctly, and will have a long service life,

please comply with the information in these Operating Instructions, as well as

the application conditions and permissible data given in the Type 6520 data

sheet:

• When planning the application of the device, and during its operation,

observe the general technical rules!

• Observe the relevant accident prevention and safety regulations applicable

for electrical equipment throughout the operation, maintenance and repair

of the device! Always switch off the voltage supply before working on the

system!

• Note that line connections and valves must not be loosened while the

system is under pressure

• Take suitable measures to prevent impairment due to improper use.

• If these instructions are ignored, no liability will be accepted from our side,

and the guarantee on the device and on accessories will become invalid!

1 GENERAL NOTES

In these Operating Instructions, the following symbols are used:

Indicates a working step that you have to carry on.

Indicates information which must be followed. Failure to do

this could endanger your health or the functionality of the

device..

ATTENTION!

NOTE Indicates important additional information, tips and

recommendations.

1.1 Symbols

1.2 General Safety instructions

6520 - 3

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2 GENERAL DESCRIPTION

Type 6520 NAMUR valve for the control of process valves with electrical

connections, available with either a 24 V connection.

2.1 Type 6520 NAMUR Valve with 24 V connection

• Pilot-driven pneumatic valve with a piezo valve as the pilot control

• Very low switching and standby current

4 - 6520

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NOTE Under normal conditions, the devices work maintenance-free.

• Drives: - Piezo drive,

• Valve housing with membrane and seat seals (5/2)

• Service ports 2 (B) / 4 (A) with change-over plate to MAMUR flange layout,

plus feed and drain connections 1, 3 and 5 with G 1/4 internal thread

• Can be installed in any position, preferably with connection at top

Operating voltage: 24 V DC ±10%

Pressure range: 2,5 to 7 bar

Flange: NAMUR flange

Standby current: < 150 µA at 24 V

Power dissipation: < 10 mW

Permissible temperature range

Ambient: - 20 to +55 ° C

Medium: - 20 to +50 ° C

Protection class: IP 65

The valve can be supplied in explosion protection class

to EN 50020, II 2G EEx ia IIC T6

3 GENERAL TECHNICAL DATA

3.1 Type 6520 NAMUR with 24 V connection

3.2 Valve construction

6520 - 5

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5/2 way valve:

In standby position, pressure port 1 connected to outlet 2.

Outlet 4 vented

3/2 way valve with return of exhaust:

In standby position, pressure port 1 blocked, outlet 2 vented

into output 4

The integrated exhaust air feedback prevents the penetration of ambient air into

the spring recess of the drive.

NOTE Application in either 5/2 or 3/2 way type.

To convert from the 5/2 to the 3/2 way model, or vice versa,

turn the change-over plate through 180°. When using as a 3/2

way valve, close off outlet 3 with the supplied G1/4 locking

screw. This ensures that the integrated feedback of outgoing

air functions correctly.

3.3 Operation

• Filtered compressed air, oiled or unoiled (max. particle size 5 µm)

• Sealing material: PB = Polyurethane and NBR

• Permissible temperature range: - 20 to +50 ° C

• Operating pressure range: 2,5 to 7 bar

ATTENTION! Note the permissible pressure range given on the rating

plate. Pressure difference between port 1 and 3/5 > 2,5 bar.

The valve is driven using instrument air, and serves as a 3/2 or 5/2-way valve

for the switching of non-inflammable media. The valve must only be operated in

the mounted condition, unless it is ensured that explosive atmospheres can

only rarely penetrate the interior of the valve, and only for short periods.

3.4 Medium

6 - 6520

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Work on the device should only be carried out by specialist staff using the

correct tools!

Before carrying out work on the system, always switch off the voltage

supply!

Implement the pressure supply with as large a volume as possible (even for

pilot devices such as pressure regulators, service units etc.);

Operating pressure ≥2,5 bar;

Minimum flow rate 270 l/min at P connection of valve 1)1)

1)1)

Before mounting the valve, clean out the pipelines!

Note, that contamination impairs the function of the PIEZO pilot valve!

Where necessary, fit a dirt trap upstream to protect from faults.

Ensure that the operating conditions agree with the performance data of

the unit!

Avoid back pressure in the exhaust channels by means of a large-volume

silencer!

4 INSTALLATION AND COMMISSIONING OF THE VALVE

Line connections and valves must not be loosened while

the system is under pressure !

There are no replacement parts for the unit! In case of fault,

please return the unit to the manufacturer.

ATTENTION!

1) In the case of version with reduced flow rate

(ID no. 141 721 Z; ID no. 141 72 S), the flow rate is reduced to 150 l/min.

6520 - 7

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Check all connections, voltages and the operational pressure!

Ensure that the max. operating data (see rating plate) id not exceeded!

Check the correct connection of ports 1 and 3 or 5 respectively in

accordance with the regulations. On no account must these be reversed!

Mount the valve directly onto the NAMUR connection flange of the

pneumatic drive using the 2 supplied M5 x 35 screws.

Fig. 3: Mounting the valve / Pneumatic position indicator

M3 x 35 screws

NOTE The supplied coded pin ensures that the device can only be

mounted in the foreseen position. (guarantees the pre-defined

direction of operation of the drive).

24 V connection

Indicator pin to show the pneumatic position

In an unswitched valve, the red indicator pin can be

pressed in. If the valve is switched, the indicator pin

travels out, and remains in this position. Every time a

functional check is carried out, this pin must be pressed

in again.

Identification label (removable for marking / inscription)

Port 14

• Not used in standard model

• Used as an control air boost connection and as a

connection for pneumatic controls

4.2 Measures to be taken before commissioning

4.1 Mounting the valve / pneumatic position indicator

8 - 6520

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4.3 Electrical connection of the Type 6520 NAMUR valve with the 24

V connection

Connection:

Terminal 1124 V

Terminal 13 0 V / Ground

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