HEROSE 01322 Instrucciones De Servicio página 21

Operating instructions
WARNING
Risk of injury due to inadequate maintenance work.
Incorrect maintenance can lead to serious injury and considerable material damage!
 Before the start of work, ensure there is sufficient room for doing the work.
 Ensure the space around the work is tidy and clean! Parts and tools in loose piles or lying around are
sources of accidents.
 If parts have been removed, take care to assemble correctly and re-install all attachment items.
 Before putting back into service, ensure:
 All maintenance work has been performed and completed.
 There are no persons in the hazard area.
 All covers and safety devices are installed and operating correctly.
CAUTION
Cold/hot pipelines and/or valves.
Risk of injury due to thermal influences!
 Isolate the valve.
 Attach warning signs.
Medium escaping at high speed and high/low temperature.
Risk of injury!
 Wear the prescribed protective equipment.
NOTICE
Impermissible stress due to operating conditions and extensions / added structures.
Valve body leaking or broken!
 Provide suitable support.
 Additional loads such as traffic, wind or earthquakes are not explicitly considered as standard and require
a separate design.
Condensation in air conditioning, cooling and refrigeration plants.
Icing!
Blocking of the actuation mechanism!
Damage due to corrosion!
 Insulate the valve with diffusion-tight material.
Improper handling.
Leak or damage to the globe valve!
 Do not store tools and/or other objects on the valve.
 Do not use tools to increase the torque of the handwheel.
Painting of the globe valve and pipelines.
Functional impairment of the valve / loss of information!
 Protect stem, plastic parts and type plate against the application of paint.
Impermissible stress.
Damage to the control mechanism!
 Do not use the valve as a foothold.
Exceeding the maximum permissible operating conditions.
Damage to the valve!
 The maximum permissible working pressure must not be exceeded, and the minimum and maximum
allowable working temperatures must be observed.
 Lay the welding/brazing bead in several sections so that the heat build-up in the middle of the body does
not exceed the maximum permissible operating temperature.
Particles and other contaminants in the conveyed medium.
Damage to the valve / internal leak!
 Remove particles/contaminants from the conveyed medium.
 It is recommended to install strainers / dirt filters in the pipework system.
Incorrect earthing during welding work in the pipeline.
Damage to the valve (burned spots)!
 Remove bonnet during welding.
 Do not use any parts of the valve for earthing during electric welding work.
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