9 - AHP Merkle GmbH

!
As a standard at AHP Merkle all piston rods are hardened
for maximum life of the hydraulic cylinders.
Hardened piston rod (AHP Merkle standard)
Non-hardened piston rod
1.16 ATEX approval
Basic information about hydraulic cylinders
The designation ATEX stands for the French abbreviation „Atmosphère explosible“. The term refers to two
Directives of the European Union (EU), namely the ATEX Equipment Directive 94/9/EC and the ATEX Workplace
Directive 1999/92/EG. In Germany, the European ATEX Equipment Directive 94/9/EC is implemented in
national law by the Explosion Protection Ordinance (Explosionsschutzverordnung / 11. GPSGV).
As a fundamental rule, hydraulic cylinders without additional electric or electronic additions do not require
approval for operation in potentially explosive environments. It is advisable, however, to ground the cylinders
on the cylinder housing and the piston rod before commissioning.
It must also be ensured that the hydraulic cylinders and the fl uids fl owing in them never become so hot that
they could ignite potentially explosive mixtures.
en
69