Richter KSE-C/F Series Safety Valves - Manual (Page 13)

Series KSE/F, KSE-C/F
Page 13
9530-050-en
Revision 04
TM 7489 Edition 03/2009
7 Operation
7.1 Initial commissioning
Normally, the valves have been tested for
leaks with air or water. Normally, the valves
have been tested for leaks with air or water.
Unless otherwise agreed, there could be residual
amounts of water in the flow section of the valve; this
could result in a possible reaction with the medium.
The max. operating pressure of the plant must
generally be less than the reseating pressure of
the safety valve.
Following the initial loading of the valve with operating
pressure and temperature, the torques of all
connecting bolts must be checked.
See Section 1.3.
7.2 Shutdown
The local regulations are to be observed
when dismantling the valve.
In every case ensure that the pipeline and
the vessel have been relieved of pressure and
emptied.
Appropriate measures are to be taken to prevent
human life and the environment being endangered
by a leak of aggressive or toxic media.
If a dismantled valve is to be returned to the
workshop or to the manufacturer, it has to be
thoroughly cleaned.
See also Section 5.4.
7.3 Recommissioning
When recommissioning the valve, make sure that all
the appropriate steps as described in Section 6.1 to
6.6 and Section 7.1 are repeated.
7.4 Improper operation and their
consequences
Fig. 16
The test pressure, checked by the manufacturer,
an approved authority or the supervisory company
responsible is secured against unauthorised
adjustment by a lead seal.
A broken lead seal must be replaced without delay.
This can either be done by the manufacturer, the
approved authority or the supervisory company
responsible.
It is emphasised that in the case of the
operating company adding the lead
seal itself, it automatically assumes
full responsibility for any operational
hazard and resulting damage.
The travel set at the manufacturer's works ensures
reliable operation of the valve. It is forbidden to
arbitrarily alter the travel or to totally block the
valve.
During operation of the valve, no hard foreign
matter may be found between the seat and the
plug of the valve.
If foreign matter is deposited on the sealing
surfaces during reseating of the valve, the valve is
probably not tight. Damage may also occur to the
plastic sealing surfaces.