Burkert 2712 Series Manuale utente

Operating Instructions

Bedienungsanleitung

Manuel d‘utilisation

Type 2712

Piston controlled flat-seat valve

Actuator sizes 80 mm - 125 mm, Nominal diameters DN 10 - 65

Kolbengesteuertes Geradsitzventil

Antriebsgrößen 80 mm - 125 mm, Nennweiten DN 10 - 65

Soupape de réglage à tête droite commandée par piston

Tailles de mécanisme 80 mm - 125 mm, Diamètre nominal DN 10 - 65

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 - 1

CONTENTS

english

Contents of the overall operating instructions

for the piston controlled flat-seat valve

Type 2712

GENERAL INFORMATION............................................................................................................................................................................................................. 3

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

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

Contact addresses ....................................................................................................................... ................................................................................................ 4

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

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

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

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

COMMISSIONING..........................................................................................................................................................................................................................................7

Installation of the valve.............................................................................................................................................................................................................8

Pneumatic installation...............................................................................................................................................................................................................9

MAINTENANCE AND SERVICING............................................................................................................................................................................... 11

Malfunctions......................................................................................................................................................................................................................................... 12

Replacement of control cone......................................................................................................................................................................................12

Replacement of the valve seat...................................................................................................................................................................................14

Spare pare sets................................................................................................................................................................................................................................15

2 - 2712

CONTENTS

english

GENERALINFORMATION

2712 - 3

english

GENERAL

INFORMATION

Contact addresses ........................................................................................................................ ..........................................................................................4

GENERALINFORMATION

4-2712

hsilgne

Symbols

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

be endangered.

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

data that are specified in the data sheets of valve, 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 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!

•Ensure a defined and controlled re-start of the process following an interruption of the electrical or

pneumatic supply!

•Take the safety notes from the electrical part of theTop

Control

operating instructions

•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

NOTE marksimportant additional information,tipsand recommendations.

The following symbols are used in these operating instructions:

marks a work step that you must carry out.

GENERAL NOTES

Warranty 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 valveType 2712 with pneumatic drive and

theTop

Control.

.No liability will be accepted for consequent damage of any kind that may

arise from failure or malfunctioning of the device.

Contact addresses

Bürkert Fluid Control Systems

Sales Center

Christian-Bürkert-Str. 13-17

D-74653 Ingelfingen

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

Fax + 49 (0) 7940 - 10 91 448

E-mail: [email protected]

International

Contact addresses can be found on the final pages of these printed operating instructions.

And also on the internet at: www.burkert.com

Germany

TECHNICAL DATA

2712 - 5

english

TECHNICAL DATA

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

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

TECHNICAL DATA

6 - 2712

english

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

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

2/2-way piston controlled valve with control cone and flat-seat housing

Control function A

(closed by spring force in rest position)

Control function B

(open in rest position)

Drive unit material: PA (polyamide)

Housing material: stainless steel 316L

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

Media

NOTE The approved operating pressures and media temperatures are to be taken from the data

sheet or rating plate. With regard to the permissible seat leakage, the values given in DIN

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

PTFE/steel seal leakage class VI apply.

Construction of the control valve

Control medium Quality classes according to DIN ISO 8573-1

Dust content Class 5: Max. particle size 40 µm; max. particle density 10 mg/m3

Water content Class 3: Max. pressure dew point -20 °C or min. 10 degrees below the

lowest operating temperature

Oil content Class 5: Max. 25 mg/m3 in conjunction with Bürkert positioners

Class 3: Max. 1 mg/m3 in conjunction with SIDE Control Type 8635

Note: Higher demands placed on the positioner must be observed!

COMMISSIONING

2712 - 7

english

COMMISSIONING

Pneumatic installation ............................................................................................................................................................................................................. 9

COMMISSIONING

8 - 2712

english

Installation of the valve

May be installed in any position, but preferably with the drive unit above.

Observe the flow direction (general rule for control valves: flow input under seat!)

Clean the piping of contamination!

Before connecting the valve housing, take care that piping is aligned!

In the case of weld-on housings, be sure to remove the drive unit before welding.

Procedure:

1. Remove the electrical and pneumatic supplies from the

TopControl.

2. Pull off the pneumatic hose between TopControl and drive unit at

control connection of drive unit.

3. Control function A:

Pressurize the lower control port of the actuator with

compressed air (6 bar), so that the valve disk is lifted

from the valve seat and is not damaged.

Control functions B:

No compressed air must be applied.

4. Remove the actuator in the open valve position by

unscrewing the threaded nipple from the housing.

5. Before reinstalling the actuator (in the open valve

position), grease the nipple thread with stainless steel

lubricant, e.g. Klüberpaste UH1 96-402 from Messrs. Klüber.

and replace the graphite seal.

threaded

nipple

Top

Control

actuator

housing

lower

control port

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

lubricants.

6. After tightening the threaded nipple, align the control ports by turning the actuator.

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

NOTE For applications in aggressive media, we recommend attaching all free pneumatic

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

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