Burkert 2712 Series Manuel utilisateur

Operating Instructions

Bedienungsanleitung

Manuel d‘utilisation

Type 2712

Piston controlled flat-seat valve

Kolbengesteuertes Geradsitzventil

Soupape à tête droite commandée par piston

Actuator sizes 175 mm - 225 mm

Nominal diameters DN 65, DN 80, DN 100

Antriebsgrößen 175 mm - 225 mm

Nennweiten DN 65, DN 80, DN 100

Tailles de mécanisme 175 mm - 225 mm

Diamètre nominal DN 65, DN 80, DN 100

We reserve the right to make technical changes without notice.

Technische Änderungen vorbehalten.

Sous réserve de modifications techniques.

Operating Instructions 1706/_EU-EN_008 / Original DE

2712 big - 1

CONTENTS

english

Contents of the

overall operating instructions for the

Piston controlled flat-seat valve

Actuator sizes 175 - 225 mm

Nominal diameters DN 65, DN 80, DN 100

GENERAL NOTES............................................................................................................................................................................................................................... 3

Symbols .................................................................................................................................................................................................................................................. 4

Safety information ................................................................................................................................................................................................................... 4

Scope of delivery....................................................................................................................................................................................................................... 4

Warranty conditions.............................................................................................................................................................................................................. 4

TECHNICAL DATA............................................................................................................................................................................................................................. 5

Construction of the control valve ..................................................................................................................................................................... 6

Media ........................................................................................................................................................................................................................................................... 6

COMISSIONING........................................................................................................................................................................................................................................ 7

Installation........................................................................................................................................................................................................................................... 8

MAINTENANCE AND SERVICING........................................................................................................................................................................... 9

Malfunctions................................................................................................................................................................................................................................. 10

Replacing the control cone..................................................................................................................................................................................... 10

Replacement of valve seat ....................................................................................................................................................................................... 12

Spare parts sets for standard valves ....................................................................................................................................................... 13

2 - 2712 big

CONTENTS

english

2712 big - 3

GENERAL NOTES

english

GENERAL

NOTES

Symbols

..................................................................................................................................................................................................................................................

Safety notes

Scope of delivery

Warranty conditions

4-2712 big

GENERALNOTES

hsilgne

Warranty conditions

This document contains no warranty statements. In this connection we refer to our general sales and

business conditions. A prerequisite for validity of the warranty is use of the device as intended with

observance of the specified conditions of use.

ATTENTION!

The warranty covers only faultless condition of the valveType 2712 with pneumatic

actuator and theTopControl.No liability will be accepted for consequential damage of

any kind that may arise from failure or malfunctioning of the device.

Scope of delivery

Immediately after receipt of a shipment, make sure that the contents are undamaged and match the

scope of delivery stated on the packing slip.

If there are discrepancies, please contact immediately our customer service:

Bürkert Fluid Control Systems

Sales Center

Christian-Bürkert-Str.13-17

D-76453Ingelfingen

Tel.:+49 (0) 7940 - 10 91 111

Fax:+49 (0) 7940 - 10 91 448

E-Mail:info@de.buerkert.com

Symbols

The following symbols are used in these operating instructions:

marks a work step thet you must carry out.

ATTENTION!

marks notes on whose non-observance your health or the functioning of the device will

beendangered.

NOTE

marksimportant additional information, tipsand recommendations.

Please observe the notes in these operating instructions together with the conditions of use and permitted

data that are specified in the data sheets for the pneumatically actuated valve and for the Top

Control

, in

order that the device will function perfectly and remain operable for a long time:

•Keep to standard engineering rules in planning the use of and operating the device!

•Installation and maintenance work are only allowed by specialist personnel using suitable tools!

•Observe the current regulations on accident prevention and safety for electrical devices during

operation and maintenance of the device!

•Switch off the supply voltage in all cases before intervening in the system!

•Note that in systems under pressure, piping and valves may not be loosened!

•Take suitable precautions to prevent inadvertent operation or damage by unauthorized action!

•Make sure that after an interruption to the electrical or pneumatic supply, the process starts up again in

awell-defined, controlled manner!

•Read the safety notes for the electrical part in the operating instructions for theTop

Control

•On non-observance of these notes and unauthorized interference with the device, we will refuse all

liability and the warranty on device and accessories will become void!

Safety notes

2712 big - 5

TECHNICAL DATA

english

TECHNICAL

DATA

Construction of the control valve

.....................................................................................................................................................................

Media

6 - 2712 big

TECHNICAL DATA

english

Liquid and gaseous media are suitable that do not attack the housing and seal materials.

Control medium:instrument air, Class 3 to DIN ISO 8573-1

Construction of the control valve

Media

NOTE

Theapproved operating pressuresand mediatemperatures are tobe takenfrom the data

sheet or rating plate.With regard to the permissible seat leakage rate, the values specified

in DIN EN 1349 are complied with, whereby for the steel/steel seal, leakage class IV

applies, and for the PTFE/steel seal, leakage class VI applies.

2/2-way piston controlled valve with control cone andY-housing.

Controlfunction A

(closed by spring force in rest position)

Controlfunction B

(openin rest position)

Actuatormaterial: PA(polyamide)

Housingmaterial: stainless steel 316L

Seal materials: steel/steel (1.4571) or PTFE/steel

2712 big - 7

COMMISSIONING

english

COMMISSIONING

Installation of the valve

8 - 2712 big

COMMISSIONING

english

Procedure:

1. Remove the electrical and pneumatic supplies from the

Top

Control

2. Pulloff the pneumatichose betweenTop

Control

and actuator

at the control port of the latter.

Control function A:

Pressurize the lower control port of the actuator with

compressed air (6 bar), so that the control cone is lifted from

the valve seat and is not damaged.

Control function B:

With control function B, no compressed air must be applied

for this purpose.

4. Remove the actuator in the open valve position by

unscrewingthe threaded nipple(SW70)from the housing.

Installation of the valve

NOTE

Forapplications in aggressive media, werecommaend attachingall free pneumatic

connections to a pneumatic hose whose other end lies in a neutral atmosphere.

DN 65 80 100

Tightening torque

[Nm] 100 ± 5 120 ± 5 150 ± 5

Tightening torques for the threaded nipple (SW70)

ATTENTION!

not

loosen the screw (SW65) above the

threadednipple!

screw

(SW65)

threadednipple

(SW70)

5. Before reinstalling the actuator (in the open valve position), grease the nipple thread with

stainlesssteel lubricant, e.g. Klüberpaste UH196-402 fromMessrs. Klüber andreplace

thegraphite seal.

6. After tightening the threadednipple (observe torque),the actuatorcan be alignedas required.

Forthis purpose,unscrew the screw(SW65) abovethe threaded nipple ca. ahalf-turn andbring the

actuator into the desired position.

Then retighten the screw with a torque of 100 ± 5 Nm.

ATTENTION!

For special applications such as for oxygen and analysis, use only the approved

lubricants.

Installationin anyorientation, butpreferably withthe actuatorabove.

Observe the direction of flow: with control valves the general rule is: inlet under seat!

Cleanpipingfrom contamination!

Before attaching the valve housing, make sure the piping is aligned!

If the housing is to be welded on, make absolutely sure that the drive unit is removed beforehand.

ATTENTION!

During this operation, the valve must also be in the open position.

Top

Control

actuator

housing

lower

control port

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