Special Dangers - Garlock GAR-SEAL Instructions De Service

No valve may be operated whose permitted pressure-temperature limits are not sufficient for
the operating conditions: The permitted range is described in the planning documents and
technical data sheets of Garlock Armaturen – see paragraph 9 <Further information>.
For application outside this range release by Garlock is mandatory.
Danger to
Non-conformity with this regulation will result in danger for life and health and may cause
Life
damage in the piping system.
P x T - Diagram GAR-SEAL Butterfly Valve
bar
20
18
DN 50 - DN 300/ 2" - 12"
16
14
12
DN 40, 350 - 600/ 1½", 14" - 24"
10
8
6
4
2
0
-4
In the planning documents and technical data sheets of Garlock Valves see paragraph 9
<Further information> relevant information concerning selection of valves, installation
dimensions, installation weights and valve structure are to be found.
In case of doubt, please contact Garlock.
Note
It must be ensured that the selected materials of the parts of the valve with media contact are
fit for purpose. Garlock will assume no liability for damage caused by corrosion of aggressive
media.
Non-conformity with this regulation will result in danger for life and health and may cause
Danger to
damage in the piping system.
Life
In the case of a scheduled inspection of the pipeline system on transportable pressure
equipment, a tightness test of the valve is recommended.
Attention
2.3

Special dangers

Before removing the valve from the piping or before loosening the body screws the pressure
in the piping must be completely relieved on both sides of the valve, ensuring there is no
uncontrolled escape of medium.
Danger
to Life
If a valve has to be removed from piping, medium may escape from the piping or the valve. In
case of unhealthy or dangerous media the piping must be completely emptied before the valve
is removed. Be careful of residue that might be flowing out.
Danger
For valves used as a end-of-line valves:
A blind flange should always be fitted and the valve should be locked in the "CLOSED" position
to prevent unintentional opening. Exceptions are only permitted if a comprehensive written risk
assessment for this situation has been prepared beforehand.
Danger
If a valve as an end-of-line valve in a pressure-conducting system is to be opened, utmost care
should be taken, such that splashing medium cannot cause damage.
Take due care when closing the end valve: Danger of crushing between valve disk and body!
Danger
0 40 80
200 C
20 160 0
18
PTFE white,
antistatic, abrasive
UHMWPE
Leaders in Sealing Integrity