Explosive Atmosphere - Boulton Pumps ESK Series Instruction For Operation And Maintenance

1.3.2. Explosive atmosphere

This section should be read carefully for the pumps operating at explosive atmospheres.
Only the products certificated for the explosive atmospheres should be used at the explosive atmospheres.
Detailed information about the operating conditions at the explosive atmospheres are found in Directive on Equipment
for Potentially Explosive Atmospheres 2014/34/UE (ATEX).
The pumps to be used at the explosive atmospheres should never be used at areas apart from the specified areas.
1.3.2.1. Intended use - ATEX
The centrifugal pumps of the series ESN-EX or ESH-EX are Category 2 equipment according to the European Directive
2014/34/EU. They are designed to operate in Zone 1 (due to the presence of flammable gases or vapours of subgroups
IIIA and/or IIIB) and in Zone 21 (due to the presence of combustible dust of dust subgroups IIIA, IIIB and IIIC).
The assembly is suitable for operation with flammable liquids of sub-group IIA or IIB (ZONE 1).
The user must verify that the equipment purchased is suitable for operation in his facilities, according to the existing
zone classification and the characteristics of the products present.
The marking of these centrifugal pumps according to Directive 2014/34/EU is:
II 2GD Ex h IIB IIIC TX Gb Db X
or also
II 2G Ex h IIB T. Gb X
II 2D Ex h IIIC T...°C Db X
The "X" in the marking indicates "Special Conditions of Use":
1) It is a prerequisite for ensuring the safety of the equipment against the risk of explosion according to the requirements
of Category 2 that the centrifugal pump must at all times be operated in a primed condition with liquid inside. The user
who must ensure a sufficient liquid level to cover the impeller must observe this requirement.
2) The maximum surface temperature of the equipment depends on the pumped fluid:
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