5
Ausgabe
issue
D / 29.04.09
Dokument
document
OM.SAF.02e
Blatt
sheet
1 (4)
1
Safety
1.11
Safety clearances
1.11.1 General
•
Open hopper pumps are not ready-to-run units in delivery condition, therefore they are sup-
plied with a declaration by the manufacturer.
•
The owner is responsible for appropriate protective devices/feeder hoppers in order to
guarantee conformity of the system.
1.11.2 Applicability of the safety clearances
•
Inadequate protection for certain dangers (e.g. radiation and substance emissions).
–
Additional or other measures necessary.
•
Protection for those persons who are attempting to reach danger areas without additional
help and under the conditions defined for various situations of reaching up, reaching under
or reaching through.
1.11.3 Definition
1.11.3.1 Protective structure
Use a physical barrier (e.g. guard, part of a machine) in order to limit movement of the body
or a body part.
1.11.3.2 Safety clearance
Use appropriate minimum clearance by means of protective structure in front of the danger
area.
1.11.4 Values for safety clearances
1.11.4.1 Precondition
Safety clearances defined as follows:
•
Protective structures and openings in them retain their shape and position.
•
Measure safety clearances between limiting surfaces and the body or affected body part.
•
Danger area can be reached with difficulty.
•
The reference level is the level on which people normally stand, e.g. floor or working plat-
form.
•
Do not use any objects such as chairs, ladders to change the reference level.
•
Do not use any objects such as rods or tools to extend the natural reach of upper extremi-
ties.
1.11.5 Reaching overprotective structures
The following code letters are used
a = Height of the danger area
b = Height of the protective structure
c = Horizontal distance to the danger area
If the danger area represents a severe risk, then the values in the table or other technical
safety measures must be used.
If the known values for a, b or c fall between two values in the table, use values that result
in a higher level of safety.
