DEVICE DESCRIPTION
2
7
VERSAFLOW VORTEX 200
www.honeywellprocess.com
34-VF-25-137 iss.1 GLO July 2019 US
2.3 Flammable products
Atmospheric conditions:
Atmospheric conditions:
Atmospheric conditions:
Atmospheric conditions:
The standard atmospheric conditions under which it may be assumed that Ex equipment can be
operated are:
•
Temperature: -20...+60
°
C / -4...+140
°
F
•
Pressure: 80...110 kPa (0.8...1.1 bar) / 11.6...15.9 psi
•
Air with normal oxygen content, typically 21%v/v
Ex equipment operating outside the standard temperature range must be tested and certified
(e.g. for ambient temperature range -40...+65
°
C / -40...+149
°
F).
Ex equipment operating outside the standard atmospheric pressure range and standard oxygen
content is not permitted.
Operating conditions:
Operating conditions:
Operating conditions:
Operating conditions:
Vortex flowmeters operate outside the standard atmospheric pressure range, which means that
explosion protection, regardless of the zone assignment, is fundamentally not applicable for the
measuring unit (piping).
2.4 Equipment category
Vortex flowmeters are designed in category II 2 G / II 2 D or EPL Gb and EPL Db according to
EN 60079-0, EN 60079-1 and EN 60079-31 for use in zone 1 or zone 21. The inside of the
measuring unit is also approved for zone 1.
Vortex flowmeters are designed according to the "IECEx-Scheme" according to "Equipment
Protection Level [EPL] Gb or [EPL] Db".
CAUTION!
Operation with flammable products is only permitted as long as no explosive fuel/air mixture
builds up inside of the piping at the same time the atmospheric conditions are exceeded.
The operator is responsible to ensure that the flowmeter is operated safely in terms of the
temperature and pressure of the products used. In case of operation with flammable products
the measuring units must be included in the periodic pressure tests of the piping.
INFORMATION!
Definition of zone 1 according to EN 1127-1, Appendix B:
An area in which an explosive atmosphere, as a result of the mixture of flammable substances in
the form of gas, steam or mist with air, under normal operation may occasionally occur.
Definition of zone 21 according to EN 1127-1, Appendix B:
An area in which an explosive atmosphere may occasionally occur in the form of a cloud of
flammable dust in the air under normal operation.
