HEROSE 15C02, Operating Instructions Manual, Page: 38 / 108

Operating instructions
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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 globe valves are
given in the table below and are based on the national standards of the country of manufacture.
Inspection and maintenance intervals
Recommended intervals
Description Interval Scope

Inspection
During start-up

Visual inspection

of the valve for damage;

of the marking for legibility;

Installation position;

Leak-tightness

at the packing gland;

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

Function and tightness test
including visual inspection.

Internal inspection
Every 5 years or ≥ 500
loading cycles

Replacement of all sealing
elements, including a function and
tightness test and visual inspection
with check for cracks.

Hydraulic test
Every 10 years

Replacement of all sealing
elements, including a function, leak
and pressure test as well as an
inspection.
7.3 Fault table
Fault Cause Remedy

Leak at the stem
Gland nut loose

Retighten the gland nut
Packing gland defective

Replace the packing gland
Fit on the stem damaged

Replace the stem
Seal damaged

Replace seal

Ball valve does not
open / close
Gland nut overtightened

Loosen the gland nut
Tightness must still be ensured
Actuator not working

Check energy supply to the
actuator