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OPERATING MANUAL
VERSION 12/2012 ORDER NUMBER DOC 2330426
3 IDENTIFICATION
3.1 EXPLOSION PROTECTION IDENTIFICATION
3.2 MAXIMUM SURFACE TEMPERATURE
Maximum surface temperature: the same as the permissible material temperature.
Permissible ambient temperature: see under Technical data, Section 5.3.2.
A) Metallic versions (aluminum and stainless steel) and conductive Acetal:
Pneumatic double diaphragm pumps with order number
U550.ATRD7 U551.ATSS7 U555.ATSS7
U550.ATSS7 U551.303
U550.ATSS8 U553.GTSS1
U550.STSS7
U552.GHSS1
U552.GHSS7
As de ned in the Directive 94/9/EC (ATEX 95), the unit is suitable for use in areas where
there is an explosion hazard.
+4°C Tamb +40°C
European Communities
Symbol for explosion protection
Unit class II
Category 2 (Zone 1)
Ex-atmosphere gas
Explosion group
Temperature class: maximum surface temperature < 135 °C; 275 °F
Tamb +4 °C to +40 °C: permissible ambient temperature area