HEROSE 03021, Operating Instructions Manual

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Operating instructions
herose.com
1
9
7.2.1 Inspection and maintenance intervals
Recommended intervals
Description Interval Scope
Inspection

During start-up

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.
Functional testing

annually 
Test of the opening and closing
function of the valve(s), including
visual inspection.
External inspection

Every 2 years 
Check of function and leak-
tightness including visual check.
Internal inspection

Every 5 years

Replacement of all sealing
elements
1
, including a function and
leak test as well as a visual
inspection.
Hydraulic testing

Every 10 years 
Replacement of all sealing
elements
1
, including a function,
leak and pressure test as well as
an inspection.
1
Applies only to industrial valves.
7.3 Fault table
Fault Cause Remedial action

Leak at the spindle
Gland nut loose

Retighten the gland nut
Gland packing defective

Replace the gland packing
Fit on the spindle damaged
1

Replace the spindle
1

Leak between bonnet
and body Bonnet loose

Retighten the bonnet screws
Seal damaged
1

Replace the seal
1

Leak in the seat
Foreign bodies between
closing body and seat

Remove foreign body / flush the
system
Seat damaged
1

Replace the body
1
Sealing surface of closing
body damaged
1

Replace closing body
1

Valve does not open /
close
Gland nut overtightened

Loosen the gland nut
Tightness must still be ensured
Thread seized
1

Replace bonnet
1

Replace closing body
1
1
Applies only to industrial valves.