Festo DFPD-Series, Инструкция по эксплуатации

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Safety characteristic (in accordance with
IEC 61508) Value
Mean probability of dangerous failure on demand
(Average Probability of Failure on Demand) 1oo1 PFD
avg
(T
I
= 1 a) 7.80 · 10
-4
Mean probability of dangerous failure on demand
(Average Probability of Failure on Demand) 1oo2 PFD
avg
(T
I
= 1 a) 7.87 · 10
-5
High Demand Mode
Assumed demands per year (Assumed Demands per Year) n
op
8760/a
Mean frequency of a dangerous failure per hour
(Probability of dangerous Failure per hour) PFH 1.01 · 10
-7
/h
Tab. 3 Safety characteristics
2.3 Training of qualified personnel
Work on the product should only be conducted by qualified personnel.
3 Additional information
– Accessories è www.festo.com/catalogue.
– Spare parts è www.festo.com/spareparts.
4 Service
Contact your regional Festo contact person if you have technical questions
è www.festo.com.
5 Product overview
5.1 Product design
1 Thread for transport lugs
(DFPD-2300 only)
2 Mounting thread for coding pin
3 Supply port (4)
4 Mounting thread for pneumatic
NAMUR switching valve
5 Mounting thread adapter accord-
ing to VDI 3847-2 (only -VDE2)
6 End-position adjustment on both
sides
7 Mounting thread for process valve
according to ISO 5211
8 Coupling for process valve
9 Centring ring for mounting on
adapter bridge (only -C-...)
10 Leakage slot
11 Supply port (2) (only -VDE2)
12 Supply port (4) (only -VDE2)
13 Supply port (2)
14 Mounting thread for limit switch or
position sensor
15 Transmission shaft (shaft groove
shows the process valve position –
here closed)
Fig. 1 Product structure (DFPD-2300 as an example)
A shaft projects outward through the housing on both sides. It transmits the reac-
tion torque to a process valve and, if applicable, a limit switch or position sensor.
The end stops can be adjusted in the range of ±5° using the end-position adjust-
ment on both sides
6 .
5.2 Function
The piston movement of the semi-rotary drive is converted into a swivel motion of
the transmission shaft by Rack & Pinion kinematics (gear rack pinion).
Double-acting semi-rotary drives
Fig. 2 Symbol for double-acting semi-rotary drive
Pressurisation and exhaust of the cylinder chamber results in an opening/closing
motion of the drive.
Single-acting semi-rotary drives
Fig. 3 Symbol for single-acting semi-rotary drive
Return is by spring force.
Symbol on the rating plate
Type Mode of operation Symbol
DFPD-RD-... double-acting, closes to the right
DFPD-LD-... double-acting, closes to the left
–
DFPD-RS-... single-acting (spring return), closes to the right
DFPD-LS-... single-acting (spring return), closes to the left
Tab. 4 Symbols for mode of operation
6 Transport and storage
WARNING!
Danger of crushing. Danger of shearing.
Body parts can be crushed or severed if the product falls.
•
Use appropriate load handling equipment.
• For DFPD-2300: screw suitable transport lugs into the specified threaded
holes. Lift the drive by the transport lugs.
– When dispatching used products: comply with all legal requirements for the
handling of hazardous substances and the transport of dangerous goods. For
return to Festo
è 2.1 General safety instructions.
– Remove all attachments.
– Store the product in a cool, dry, UV-protected and corrosion-protected envir-
onment. Ensure that storage times are kept to a minimum.
– For long-term storage: test the function of the product regularly.
– Observe environmental and storage conditions .
– Seal pneumatic ports.
– Protect coupling parts with grease or protective oil.
– Store the product on a level wooden pallet to prevent damage to the coupling
flange.
7 Mounting and installation
7.1 Assembly without adapter bridge
1 Semi-rotary drive
2 Process valve
Fig. 4 Assembly without adapter bridge
1. Prepare process valve.
Adjust the control shaft of the process valve to implement the desired operat-
ing method for opening and closing.
2. Place the semi-rotary drive on the control shaft of the process valve. The con-
trol shaft must sit in the coupling of the semi-rotary drive ( è Fig.1, 8 )
without tilting.
3. Mount the semi-rotary drive on the connecting flange of the process valve
using 4 corrosion-resistant screws, retaining rings and nuts (material: CI).
4. Tighten the screws crosswise
è
Tab. 12 Tightening torques for flange.