Maintenance And Service; Fault Table - HEROSE 05411 Instrucciones De Servicio

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

7.3

Fault table

Fault
Leak between bonnet

and body
Leak in the seating

Body leaking

Valve does not open /

close
26
Operating instructions
Recommended intervals
Interval
During start-up
Annually
Every 2 years
Every 5 years or ≥ 500
loading cycles
Every 10 years
Cause
Bonnet loose
Seal damaged
Foreign body between cone
and seating
Seating damaged
Cone seal damaged
Discontinuity/gas cavity open
Cone stuck
Phone +49 4531 509-0
Scope
Visual inspection

of the check valve for

damage;
of the valving marking for

legibility;
Leak-tightness

Between cover and body;

of the valve seat;

Test the opening and closing

functions of the valve.
Test the opening and closing

functions of
the 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 and
tightness test as well as an
inspection.
Remedy
Retighten the bonnet / bolts

Replace seal

Remove foreign body / flush the

system
Replace the body

Replace the cone

Replace the body

Replace the bonnet and cone
