Festo DFPK-46-17-T32-V4 Bedienungsanleitung

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Translation of the original instructions

© 2021 all rights reserved to Festo SE & Co. KG

1Applicable documents

NOTICE!

Technical data for the product can have different values in other documents. For

operation in an explosive atmosphere, the technical data in this document always

have priority.

All available documents for the product www.festo.com/sp.è

1.1Identification EX

Identification mark

II 2GEx h IIC T6…T4 Gb

II 2DEx h IIIC T80°C…T120°C Db

0°C T£

a

+60°C £

Tab. 1

2Safety

2.1General safety instructions

–The device can be used under the stated operating conditions in zones 1 and

2, explosive gas atmospheres, and in zones 21 and 22, explosive dust atmo

spheres.

–Use the device in its original status without any unauthorised modifications.

–All work must be carried out outside of potentially explosive areas.

–Extraction of the operating medium outside the potentially explosive area.

–Use approved accessories.

–Only use media in accordance with the specifications. 9 Technical data.è

Media

–When using saturated steam: take vapour pressure into account when

designing the valve

Drive

–Do not open the drive (pressure in the drive or spring under tension).

–Avoid mechanical stresses on the valve. Do not use the drive as a lever.

2.2Intended use

The piston drive DFPK is intended for use with an angle seat valve VZXA... or a

cover kit VAVCF12SCC....

2.3Training of qualified personnel

Work on the product should only be conducted by qualified personnel. The quali

fied personnel must be familiar with installation of process automation systems.

3Further information

–Accessories www.festo.com/catalogue.è

–Spare parts www.festo.com/spareparts.è

4Service

Contact your regional Festo contact person if you have technical questions

èwww.festo.com.

5Product overview

5.1Configuration

5.1.1Product design

1

Position indicator

2

Pneumatic connection (2)

3

Drive/angle seat valve or cover kit

interface

4

Drive housing

5

Pneumatic connection (4)

Fig. 1 Product design

Position indicator

The pneumatic position indication shows the position of the actuator stem.

Indicator cylinder aboveIndicator cylinder below

Actuator stem retracted, valve openedActuator stem extended, valve closed

Tab. 2 Position indicator

5.2Function

The piston drive DFPK is a pneumatic drive actuated by compressed gas. The

DFPK can be used for the following applications:

–valve drive in combination with angle seat valve VZXA...

–valve block solution in combination with cover kit VAVCF12SCC...

The piston drive can be supplied as a doubleacting or singleacting drive. Single

acting drives have a spring system for opening and closing the connected valve in

case of pressure drop or pressure loss.

Control valves are required for switching the piston drive.

Flow over valve seat

–Only suitable for gaseous media, because use of incompressible media

causes pressure surges in the piping.

Control function

Single-actingDouble-acting

Closed by spring force or by

reduced spring force (normally

closed  NC)

Opened by spring force (nor

mally open NO)

Opening and closing by two

way pressurising with operating

medium (compressed air)

Tab. 3 Control function

8143604

DFPK

Piston drive

8143604

202009a

[8143606]

Operating instructions

Festo SE & Co. KG

Ruiter Straße 82

73734 Esslingen

Germany

+49 711 3470

www.festo.com

Produktspezifikationen