IOM-POSR-2
19
Cashco, Inc. declares that the products listed in the table below has been found to comply with the Essential
Health and Safety Requirements relating to the design and construction of products intended for use in potentially
explosive atmospheres given in Annex II of the ATEX Directive 2014/34/EU. Compliance with the Essential
Health and Safety Requirements has been assured by compliance with EN ISO 80079-36:2016 and EN ISO
80079-37:2016. The product will be marked as follows:
II 2 G
Ex h IIB T6... T1 Gb
1000ATEXR1 X
The ‘X’ placed after the technical file number indicates that the product is subject to specific conditions of use as
follows:
1. The maximum surface temperature depends entirely on the operating conditions and not the equipment
itself. The combination of the maximum ambient and the maximum process medium temperature shall
be used to determine the maximum surface temperature and corresponding temperature classification,
considering the safety margins described prescribed in EN ISO 80079-36:2016, Clause 8.2. Additionally, the
system designer and users must take precautions to prevent rapid system pressurization which may raise
the surface temperature of system components and tubing due to adiabatic compression of the system gas.
Furthermore, the Joule-Thomson effect may cause process gases to rise in temperature as they expand
going through a regulator. This could raise the external surface temperature of the regulator body and
the downstream piping creating a potential source of ignition. Whether the Joule-Thomson effect leads to
heating or cooling of the process gas depends on the process gas and the inlet and outlet pressures. The
system designer is responsible for determining whether the process gas temperature may raise under any
operating conditions.
2. Where the process medium is a liquid or semi-solid material with a surface resistance in excess of 1G
Ω
,
special precautions shall be taken to ensure the process does not generate electrostatic discharge.
3. Special consideration shall be made regarding the filtration of the process medium if there is a potential for
the process medium to contain solid particles. Where particles are present, the process flow shall be <1m/s
(<3.3 ft/s) in order to prevent friction between the process medium and internal surfaces.
4. Effective earthing (grounding) of the product shall be ensured during installation.
5. The valve body/housing shall be regularly cleaned to prevent build up of dust deposits.
6. Regulators must be ordered with the non-relieving option (instead of the self-relieving option) if the process
gas they are to be used with is hazardous (flammable, toxic, etc.). The self-relieving option vents process
gas through the regulator cap directly into the atmosphere while the non-relieving option does not. Using
regulators with the self-relieving option in a flammable gas system could create an explosive atmosphere in
the vicinity of the regulator.
7. Tied diaphragm regulators with outlet ranges greater than 7 barg (100 psig) should be preset to minimize the
risk that improper operation might lead to an outboard leak and a potentially explosive atmosphere.
8. All equipment must only be fitted with manufacturer’s original spare parts.
9. Ensure that only non-sparking tools are used, as per EN 1127-1, Annex A.
ATEX 2014/34/EU: Explosive Atmospheres and Cashco Inc. Products
