Festo DFPD Series Translation Of The Original Instructions

DFPD
Quater turn actuator
Operating conditions | EX
8099381
2018-10a
[8099383]
Translation of the original instructions
1 Identification EX
Identification
Standard variant
II 2G Ex h IIC T4 Gb X
II 2D Ex h IIIC T105°C Db X
–20°C £ T £ +80°C
a
Variant T4
II 2G Ex h IIC T3 Gb X
II 2D Ex h IIIC T175°C Db X
0°C £ T £ +150°C
a
Variant T6
II 2G Ex h IIC T6 Gb X
II 2D Ex h IIIC T85°C Db X
–50°C £ T £ +60°C
a
Tab. 1
2 Further applicable 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 è www.festo.com/pk.
3 Certified products
Type
DFPD-10
DFPD-20
DFPD-40
DFPD-80
DFPD-120
DFPD-160
DFPD-240
Tab. 2
4 Function
Pressurising the cylinder chambers causes the piston in the pipe to move back
and forth. The conversion of the linear movement into turning movement is car-
ried out by a gear rack and pinion gear unit.
5 Safety
5.1 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.
Festo AG & Co. KG
Ruiter Straße 82
73734 Esslingen
Germany
+49 711 347-0
www.festo.com
8099381
Type
DFPD-300
DFPD-480
DFPD-700
DFPD-900
DFPD-1200
DFPD-2300
–
– All work must be carried out outside of potentially explosive areas.
– The device is not intended for use with other fluids.
– It is not intended to be used as a spring and damping element. Impermissible
loads may occur.
5.2 Intended use
The actuator is intended for use for fittings with a movement range limited to 90°,
e. g. ball valves and butterfly valves:
5.3 Identification X: special conditions
– Danger of electrostatic discharge.
– Ambient temperature
Standard: –20°C £ T £ +80°C
a
Variant T4: 0°C £ T £ +150°C
a
Variant T6: –50°C £ T £ +60°C
a
6 Commissioning
– Seal unused openings with blanking plugs or slot covers.
WARNING!
The discharge of electrostatically charged parts can lead to ignitable sparks.
• Prevent electrostatic charging by taking appropriate installation and cleaning
measures.
• For equipotential bonding, connect all the conducting metal parts with one
another.
• Include the shaft in the system's equipotential bonding.
• Include the housing in the equipotential bonding of the system.
• Earth the entire system.
WARNING!
Corrosive gases and dust particles inside components can result in changes to
material and material damage. Explosive gas atmospheres or dust should not
penetrate into the spring area of single-acting drives.
• Install an exhaust return using a 3/2-way valve that is suitable for zones 1, 2,
21 and 22 or
• extract the air in the spring area via tubing lines at connection 4 outside
potentially explosive areas.
NOTICE!
Installation and commissioning may only be performed in accordance with the
operating instructions and by qualified personnel.
NOTICE!
Escaping exhaust air can swirl up dust and create an explosive dust atmosphere.
NOTICE!
Strong charge-generating processes can charge non-conductive layers and coat-
ings on metal surfaces.
NOTICE!
Related type of ignition protection: c (constructional safety)
NOTICE!
Particulate matter in the compressed air can cause electrostatic charges.
In the following NAMUR valves from Festo, the exhaust air return is included in the
design:
• VSNC- ...
• VOFC/VOFD- ...
Fig. 1 Exhaust return
7 Maintenance and care
– Service the device after 6 months at the latest and ensure smooth function-
ing.