Christian Maier GmbH & Co. KG
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Operating manual Series DP_en – Part-B-Version 10 – 19.03.2020
2/31
B
3.5
Risk Assessment and Residual Risks
Rotary joints are machine components that can be used in a large variety of machines and
systems. These products are not subject to the Machinery Directive 2006/42/EC – hazards
caused by this product are treated by compliance with the pertinent directive 2014/68/EC
(Pressure Equipment Directive). Directive 2014/34/EC (Explosion Protection Directive) addi-
tionally applies to "ATEX" certified rotary joints.
After installation of our rotary joints into systems/machines, these are subject to the Ma-
chinery Directive and may be subject to additional directives and legislation. The user of our
products is responsible for complying with all pertinent directives and legislation as well as
for performing a risk assessment in accordance with these directives. Depending on the ac-
tual installation situation and the actual use of our product, risks may arise that should be
avoided by design measures, if possible.
An analysis carried out by Christian Maier GmbH & Co. KG Maschinenfabrik resulted in the
aspects listed below which necessitate an additional risk assessment by the user after instal-
lation of our products in the system/machine:
If hot parts are touched or if hot or hazardous media escape under high pressure or if
rotating parts draw in persons, this may result in severe burns, scalds, cuts or crushing.
–
Possible measures: Mount a protective cover around the rotary joint which prevents
direct contact with hot parts, safely retains escaping medium and prevents contact
with rotating parts.
–
If a cover cannot be mounted, other suitable protective measures must be taken.
Always use the housing connections provided for the safe discharge of leaking me-
dium.
If the rotary joint blocks and rotates along with the roller, hoses can be torn off and hot
or hazardous mediums may escape under high pressure.
–
Always observe the information for the design department on mounting and opera-
tion in chapter 5.
–
In particular when combining large nominal diameters with high speeds and high
temperatures, it is recommended to monitor the rotary joint by means of a torque
monitoring system – alternatively by means of a vibration sensor.
–
Ensure that the unit is regularly maintained as per chapter 7.
The user of our products must verify the applicability and effectiveness of the possible
measures listed in the actual situation.