6
EB 5866 EN
Safety instructions and measures
Qualifications of operating personnel
The control valve must be mounted, started up, serviced, and repaired by fully trained and
qualified personnel only; the accepted industry codes and practices are to be observed. Ac-
cording to these mounting and operating instructions, trained personnel refers to individuals
who are able to judge the work they are assigned to and recognize possible hazards due to
their specialized training, their knowledge and experience as well as their knowledge of the
applicable standards.
Personal protective equipment
We recommend wearing the following protective equipment:
−
Protective clothing and gloves in applications with hot or cold media
Î
Check with the plant operator for details on further protective equipment.
Revisions and other modifications
Revisions, conversions or other modifications to the product are not authorized by SAMSON.
They are performed at the user's own risk and may lead to safety hazards, for example. Fur-
thermore, the product may no longer meet the requirements for its intended use.
Safety features
In combination with the Type 5825 Electric Actuator and with the TROVIS 5725-3, TRO-
VIS 5725-7, and TROVIS 5725-8 Electric Actuators with Process Controllers, the following
safety feature exists: upon failure of the power supply, the valve moves to a defined fail-safe
position (see section 3.1). The direction of action of the fail-safe action is defined by the actu-
ator version (see associated actuator documentation).
In combination with the Type 2780 Pneumatic Actuator, the following safety feature exists:
upon failure of the air supply, the valve moves to a certain fail-safe position (see section 3.1).
The fail-safe action corresponds with the direction of action. The fail-safe action of SAMSON
actuators is specified on the actuator nameplate (see actuator documentation).
Warning against residual hazards
To avoid personal injury or property damage, plant operators and operating personnel must
prevent hazards that could be caused in the control valve by the process medium, the operat-
ing pressure, the signal pressure or by moving parts by taking appropriate precautions. They
must observe all hazard statements, warning and caution notes in these mounting and oper-
ating instructions, especially for installation, start-up, and servicing.
Summary of Contents for 3222/5857 series
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