Series KSE/F, KSE-C/F
Page
15
9530-001-en
Revision 19
TM 9549
Edition 11/2018
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.
To prevent leaks, all connection screws should be
retightened after the initial loading of the valve with
operating pressure and operating temperature.
For tightening torques, see
Section 1.3
.
7.2 Shutdown
♦
The local regulations are to be observed when
dismantling the valve.
Prior to undoing the flange connection
ensure, that the plant is depressurised and
emptied.
♦
Prior to starting any repair work, the valve is to be
thoroughly cleaned. Medium residue may be in
the valve even if it has been properly drained and
flushed.
♦
After dismantling, immediately protect the valve
flanges against mechanical damage by using
flange caps. See also
Section 7.4
.
7.3 Recommissioning
When recommissioning the valve, make sure that all
the appropriate steps as described in
Section 6.1
to
6.7
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 compa-
ny 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 manufac-
turer, 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.
