Translation of the original instructions
© 2020 all rights reserved to Festo SE & Co. KG
1
About this document
1.1
Purpose of the document
This document describes the use of the above-mentioned product.
Certain aspects of use in combination with a hydraulic or mechanical manual over-
ride are described in other documents and must be observed.
1.2
Applicable documents
All available documents for the product
è
Document
Contents
Operating instructions DFPD-HD-...-HP
Design, commissioning and operation of the
hydraulic manual override
Operating instructions DFPD-HD-...-MW
Design, commissioning and operation of the
mechanical manual override
Operating conditions EX
Information on the use of the product in poten-
tially explosive gas atmospheres
Tab. 1 Applicable documents
1.3
Target group
The document is targeted towards individuals who install and operate the
product.
2
Safety
2.1
General safety instructions
–
Only use the product in original status without unauthorised modifications.
–
Only use the product if it is in perfect technical condition.
–
Take into consideration the legal regulations for the installation location.
–
Take into consideration the ambient conditions at the location of use. Corros-
ive environments reduce the service life of the product.
–
Observe the specifications on the product labelling.
–
Observe labelling on the product.
–
Prior to mounting, installation and maintenance work: Switch off compressed
air supply and secure it from being switched back on.
–
Exhaust drive prior to assembly, installation and dismounting.
Operating medium
–
Use compressed air only in accordance with the specifications
è
–
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 lubricated compressed air only.
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 returned 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 the handling of hazardous substances
and the transport of dangerous goods.
2.2
Intended use
The product is intended to actuate process valves, such as ball valves and butter-
fly valves, with a rotation angle from 0° (valve closed) to 90°. The product is suit-
able for control of media-flow process valves in fluid engineering systems.
NOTICE!
The operating torque of the drive must not be greater than the maximum permiss-
ible torque listed in ISO 5211 in relation to the size of the mounting flange and of
the coupling.
2.3
Training of qualified personnel
Installation, commissioning, maintenance and disassembly should only be con-
ducted by qualified personnel.
3
Additional information
–
Accessories
è
4
Service
Contact your regional Festo contact person if you have technical questions
è
5
Product overview
5.1
Product design
The product labelling is located on the gear unit.
1 Port (2)
2 Adjustable stop for end-position
adjustment
3 Pneumatic cylinder
4 Mounting thread in accordance
with ISO 5211
5 Keyway
6 Mounting thread, e.g. for sensor
box
7 Transmission shaft (internal),
delivery status "valve closed"
8 Spring package
9 Adjusting screw for end-position
adjustment
10 Transport lug
11 Gear unit
12 Mechanical position indication
13 Port (4)
Fig. 1 Product design
5.2
Function
Fig. 2 Symbol - single-acting semi-rotary drive
The DFPD-HD-...-...S... is a single-acting semi-rotary drive. The piston is moved by
pressurising the pneumatic cylinder. The semi-rotary drive of type
DFPD-HD -...- RS closes clockwise, the type DFPD-HD -...- LS closes anti-clockwise.
The linear motion of the piston is converted into a swivel motion of the transmis-
sion shaft by a Scotch yoke system (Scotch-Yoke). The spring force returns the
process valve. The connected process valve records the reaction torque of the
semi-rotary drive.
Fig. 3 Mode of operation (example for DFPD-HD -...- RS)
8134576
DFPD-HD-...-...S
Semi-rotary drive
8134576
2020-06b
[8134578]
Operating instructions
Festo SE & Co. KG
Ruiter Straße 82
73734 Esslingen
Germany
+49 711 347-0
www.festo.com
