Inspection And Maintenance Intervals; Fault Table - HEROSE 03021 Notice D'utilisation

7.2.1

Inspection and maintenance intervals

Description
Inspection
Functional testing
External inspection
Internal inspection
Hydraulic testing
1
Applies only to industrial valves.
7.3

Fault table

Fault

Leak at the spindle

Leak between bonnet
and body

Leak in the seat

Valve does not open /
close
1
Applies only to industrial valves.
Operating instructions
Recommended intervals
Interval

During start-up

annually

Every 2 years

Every 5 years

Every 10 years
Cause
Gland nut loose
Gland packing defective
Fit on the spindle damaged
Bonnet loose
1
Seal damaged
Foreign bodies between
closing body and seat
1
Seat damaged
Sealing surface of closing
1
body damaged
Gland nut overtightened
1
Thread seized
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Scope

Visual inspection

of the valves for damage;

of the marking for legibility;

Installation position;

Leak-tightness

at the gland packing;

between bonnet and body;

of the valve seat;

Test of the opening and closing
function of the valve.

Test of the opening and closing
function of the valve(s), including
visual inspection.

Check of function and leak-
tightness including visual check.

Replacement of all sealing
1
elements , including a function and
leak test as well as a visual
inspection.

Replacement of all sealing
1
elements , including a function,
leak and pressure test as well as
an inspection.
Remedial action

Retighten the gland nut

Replace the gland packing
1

Replace the spindle

Retighten the bonnet screws
1

Replace the seal

Remove foreign body / flush the
system
1

Replace the body

Replace closing body

Loosen the gland nut
Tightness must still be ensured
1

Replace bonnet

Replace closing body
1
1
1
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