Richter KSEA/F Series Safety Valves - Manual (Page 12)

Series KSEA/F
Page 12
9530-052-en Revision 03
TM 7128 Edition 05/2008
7 Operation
7.1 Initial commissioning
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 1.2.
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 operations and their
consequences
Fig. 15
Under no circumstances must the operating
parameters specified on the identification plate be
exceeded.
Failure to operate the valves within the
operating parameters voids the warranty!
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.