HEROSE 093 Serie Mode D'emploi page 29

Operating instructions
7 Maintenance and service
7.1 Safety during cleaning
 Take note of the specifications in the safety data sheet, the general occupational health and
safety rules and the HEROSE information sheet "Use with oxygen" if degreasers are used for process-
related reasons for the cleaning of bearing parts, unions and other precision parts.
7.2 Maintenance
The maintenance and inspection intervals must be defined by the operating company according to
the operating conditions and the national regulations.
The manufacturer's general recommendations for the maintenance and inspection of the valve are
given in the table below and are based on the national standards of the country of manufacture.
Inspection and maintenance intervals
Description
Inspection
Functional testing
External inspection
Internal inspection
Strength test
Recommended intervals
Interval
During start-up
Inspection and maintenance in
accordance with the respective
legal regulations.
In Germany, for example,
according to the Operational
Safety Ordinance
Inspection and maintenance in
accordance with the respective
legal regulations.
In Germany, for example,
according to the Operational
Safety Ordinance
Every 5 years or ≥ 500 loading
cycles
Every 10 years
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Scope
 Visual inspection
of the gate valve for damage;

of the valving marking for legibility;

Installation position;

 Leak-tightness
at the packing gland;

between bonnet and body;

of the valve seat;

 Test the opening and
closing functions of the gate valve.
 Test the opening and
closing functions of the gate valve
including a visual inspection.
 Function and tightness test including
visual inspection.
 Replacement of all sealing elements,
including a function and tightness test
as well as a visual inspection.
 Replacement of all sealing elements,
including a function, leak and pressure
test as well as an inspection.
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