BIFFI WGR 800 - 1.7 Marking for application in hazardous area; Machine Description

WGR – Worm Gear Reducer
Instruction and operating manual
© Copyright by BIFFI Italia. All right reserved MAN 684/Rev 5 Page 7
1.7 Marking for application in hazardous area
1.7.1 Label for ICON2000/ICON2000EC
The ICON 2000/ICON 2000 EC associated to the WGR, for the application in hazardous areas, must bear a label
with the following marking description:
0080 = Notified Body for ATEX
II = Group II (Surface)
2 = Category 2 apparatus
G = explosive atmosphere by gas
D = explosive atmosphere by dust
IP 66/68= degree of protection
1.7.2 Extract from the Standard
Type of Hazard
Classification of Zones
Categories acc. to 2014/34/EU Directive
Gas, mists or vapours
Zone 0
1G
Gas, mists or vapours
Zone 1
2G
Gas, mists or vapours
Zone 2
3G
Dust
Zone 20
1D
Dust
Zone 21
2D
Dust
Zone 22
3D
2 MACHINE DESCRIPTION
2.1 General
The WGR is a worm gear reducer designed to operate, in conjunction with ICON2000 electric actuator, any kind of
quarter-turn industrial valve.
The gear box is suitable to guarantee the output bush rotation of 90° with the possibility to obtain an extra stroke
of 5° for each direction of rotation. The rotation bush is stopped, in both the rotation direction, against mechanical
stoppers integrated in the gear box frame with the possibility to regulate the travel of 5° for each rotation
direction. The housing is provided with an optional vent valve in order to avoid any eventual overpressure.