Festo DFPD-x-RS Series Operating Instructions

Quarter turn actuator
DFPD 10...500
Operating instructions
(Original instructions)
Quarter turn actuator DFPD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1

About this document

This document describes the use of the above-mentioned product. It contains
additional information for the use of the product in safety-oriented systems (safety
handbook in accordance with IEC 61508).
1.1 Further applicable documents
– Certification documents
– Operating conditions for explosion protection
For all available product documentation è www.festo.com/pk
1.2 Target group
The document is targeted towards persons who mount and operate the product. It
is additionally targeted towards individuals who are entrusted with the planning
and application of the product in a safety-related system.
1.3 Specified standards
Version status
IEC 61508-1:2010
IEC 61508-2:2010
Fig. 1
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Safety

General safety information
– The product may only be used in its original status without unauthorized modi­
fications.
– Only use the product if it is in perfect technical condition.
– Take the ambient conditions into consideration at the location of use. Corrosive
environments reduce the service life of the product.
– Observe product labelling.
– Prior to all work, switch off compressed air supply and secure it against acci­
dental restarting.
– Exhaust drive prior to mounting, installation and dismantling.
– Product must be regularly tested by a qualified person, and the test must be
documented è Chapter 13.
Operating medium
– Only use compressed air in accordance with the specifications
è Technical data.
– Use only unlubricated compressed air under normal conditions. Once the
product has been used with lubricated compressed air, it must continue to be
operated with compressed air only.
– Protect the device from pressure fluctuations. Use overpressure valves and
pressure regulators.
Return to Festo
Hazardous substances can endanger the health and safety of personnel and cause
damage to the environment. To prevent hazards, the product should only be re­
turned upon explicit request by Festo.
– Consult your regional Festo contact.
– Complete the declaration of contamination and attach it to the outside of the
packaging.
– Comply with all legal requirements for handling hazardous substances and
transporting dangerous goods.
Festo AG & Co. KG
Ruiter Straße 82
73734 Esslingen
Germany
+49 711 347-0
www.festo.com
8074849
2017-07b
[8074851]
English
IEC 61508-4:2010
IEC 61511:2016
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Intended use

The DFPD quarter turn actuator is intended to actuate process valves, such as ball
valves and butterfly valves with a rotation angle from 0° (valve closed) to 180°
(depending on design).
Note
The operating torque of the drive must not be higher than the maximum per­
missible torque listed in ISO 5211, with reference to the size of the mounting
flange and of the coupling.
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Additional information

– Accessories è www.festo.com/catalogue
– Spare parts è www.festo.com/spareparts
– Documents and literature è www.festo.com/sp
5

Service

• Consult your regional Festo contact if you have technical questions
è www.festo.com.
6

Information on functional safety

6.1 Attainable safety rating
The product is suitable for use as an element in a safety-related system in accord­
ance with IEC 61511.
– In low-demand mode up to SIL 2
– In high-demand mode up to SIL 2.
Taking into account the necessary minimum hardware fault tolerance of HFT = 1,
the product can also be used up to SIL 3 with a redundant design of the entire
system.
Note
The suitability for certain applications can only be determined in connection with
the assessment of further components of the subsystem. These must achieve
the same safety level.
6.2 Safety function
Single-acting quarter turn actuators DFPD-...-RS / DFPD-...-LS
The element safety function consists of the control valve taking the switching posi­
tion if compressed air is switched off. Return is achieved through spring force.
Double-acting quarter turn actuators DFPD-...-RD / DFPD-...-LD
The element safety function consists in the execution of a complete working stroke
(opening or closing of the process valve) within a defined time.
6.3 Operating conditions
– General instructions on safe operation è Chapter 2.
– Periodic tests (performance test) è Chapter 13.
– Ambient conditions and additional technical specifications è Chapter 16.
6.4 Limitations of use
If used in a safety-related system, the service life is limited to 8 years if the operat­
ing conditions are complied with.
– Recommended interval for a complete performance test: 1 year.
– Maximum admissible interval for a complete performance test: 3 years.
If performance tests are negative, maintenance work must be performed immedi­
ately.