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3 System Description
3.2 Basic Design
22 3HNA009834-001 en Rev.06 Product Manual, Control Cabinet IRC5P
3.2.4 Purge System
General
When the robot is installed in an area where explosion hazard is present, it is
equipped with a purge system. The purpose of this system is to apply compressed
air in the manipulator. The compressed air is kept at a higher pressure than the
atmospheric pressure and so preventing hazardous gases from entering the
manipulator interior.
For more details on the purge unit, see ‘Unit Description, IRC5P’, Purge System.
Figure 5 Purge unit design
Description
The purge valve assembly includes various valves for controlling and regulating the
purge air supply to the robot. Supply air is connected to the purge unit and, via the
control valves, routed to the manipulator via the purge connector and flexible hose.
Versions
Different versions of the purge unit are available:
The purge unit shown in the above illustration is used for all stand-alone robots.
For robots operating on a trolley, a different type of purge unit, called ‘Purge Unit
with Connector Box’, is used. This purge unit includes a purged chamber with cable
connections. The main reason for using this type is to provide flexible cables via the
trolley cable chain. For information on this purge unit type, see ’Purge Unit
w/Connector Box’ on page 111.
Purge supply to dry filtered
air only (instrumental air)
Purge pressure:
WARNING! PRESSURIZED AIR
Note:
3 bar (45 psi)
Maintenance pressur e: 0,5-1 bar
TURN OFF MAIN AIR-TAB BEFORE
WORKING ON EQUIPMENT
Purge time: See machine specification
P O B ox 265, N-4349 B ryne
AB B A S, R ob o ti cs
0470
A P P ROV E D
T ype:PUR GE C ONN EC TOR BOX
Dwg.No.: 3HNM 01201-1
Part of :PURGE SYSTEM Dwg.No.3HNE 06486-1
NEMKO 02ATEX189U
Protective gas :........................... Instrumental air
Purge Supply pressure :............ Min.3.0 max.5.0 bar
Maintenance Supply pressure :. Min.0.5 max.1.0 bar
Leaquage Compensation :........... 5 -20 Nl/min.
Maintenance pressure :................. Min. 0.8 mbar
Enclosure Pressure :..................... Max. 500 mbar
Batch Serial No.
INT R IN SICALLY SAF E SIGNALS C l . I.II. D iv. 1 , Gr. A - G
[EEx pib] IIB
II (2) G,D
Supply air
Flexible hose
to manipulator
Motor and
control signals
Purge valve
control signal
Purge connection
Purge valve assy'
Purge air
hose
Purging (Flushing)
pressure regulator
Maintenance pressure
regulator
Identification label