Approval for ATEX equipment category 3
Following a very intensive and comprehensive testing process – according to ATEX Directive 94/9/EC – VACUUBRAND has now verified that most of its diaphragm pumps and pumping units do not have ignition sources in the internal, wetted parts area, and so meet the requirements of ATEX equipment category 3. This includes capacitive vacuum sensors, measuring devices and solenoid operated valves.
- applicable for pumping of Ex-mixtures “infrequently“ or “for a short period“
- during normal operation there is no ignition source in the internal, wetted parts area
- at gas temperatures up to 40°C the maximum surface and gas temperatures in the internal, wetted parts area remain below the limits specified in ATEX temperature class T3
- for areas with hazardous atmosphere around the pump and for “occasional” pumping of Ex-mixtures the special ATEX pumps for category 2 (inside and around the pump, for example, for Zone 1) continue to be recommended