wT 2860/02
Page 8
Electromagnetic radiation hazard:
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The hazards resulting from possibly created electromagnetic radiation are to be
consulted in the operating manual of the actuator manufacturer.
Hazards linked to the operational environment:
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The ambient atmosphere and the ambient temperature are to be set in a manner
that has no negative influence on the valve, the actuator of the valve, and the
medium.
Transportation hazards:
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Please see the chapter “Transportation and Storage” for transportation hazards.
Maintenance hazards:
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All maintenance and repair tasks with the exception of lubricating and subsequent
sealing of stuffing boxes are without exception to be carried out in an
unpressurized state. Where required, the valve may have to be drained prior to
servicing.
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Valves may only be removed from pipeline systems in an unpressurized and empty
state.
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Attention must be paid to exiting media when resealing.
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Caution: (Fire and chemical) burn hazard and risk of poisoning caused by valves
utilized in dangerous media. Attention must be paid to medium residues during
maintenance and putting into operation tasks.
»
Maintenance and repairs may only be carried out by qualified personnel.
Placing out of operation hazards:
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When placing out of operation, the valves must be emptied fully and attention must
be paid to hazards resulting from medium residue.
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Should valves be no longer used, they are to be disposed of correctly.
Hazards when opening drain valves:
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Danger of exiting medium. If utilized in high temperature water systems, the drain
ball valve may only be opened after it has been ensured that the drain line is either
correspondingly pressurized or that the temperature is less than 100°C (avoidance
of steam hammers in the clearance volume).
Material failure hazard:
»
Parts made of grey cast iron are especially sensitive to brittle fracture and impact.
This aspect must be considered in the course of material selection.
