Samson 4765 - Operational Safety and Warnings

6 EB 8359-1 EN
Safety instructions and measures
Revisions and other modications
Revisions, conversions or other modications of 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
Upon failure of the air supply, the positioner vents the actuator, causing the valve to move to
the fail-safe position determined by the actuator.
Warning against residual hazards
The positioner has direct inuence on the control valve. 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 operating pressure, the signal
pressure or by moving parts by taking appropriate precautions. Plant operators and
operating personnel must observe all hazard statements, warning and caution notes in these
mounting and operating instructions, especially for installation, start-up and service work.
If inadmissible motions or forces are produced in the pneumatic actuator as a result of the
supply pressure, it must be restricted using a suitable supply pressure reducing station.
Responsibilities of the operator
The operator is responsible for proper operation and compliance with the safety regulations.
Operators are obliged to provide these mounting and operating instructions to the operating
personnel and to instruct them in proper operation. Furthermore, the operator must ensure
that operating personnel or third persons are not exposed to any danger.
Responsibilities of operating personnel
Operating personnel must read and understand these mounting and operating instructions as
well as the specied hazard statements, warning and caution notes. Furthermore, the operat-
ing personnel must be familiar with the applicable health, safety and accident prevention
regulations and comply with them.
Referenced documentation
The following documents apply in addition to these mounting and operating instructions:
− The mounting and operating instructions of the components on which the positioner is
mounted (valve, actuator, valve accessories etc.).