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SEMPELL
MODEL PSRV - PRESSURIZER SAFETY RELIEF VALVES
TYPE VS99 PILOT OPERATED
Design
Compact block design with directly mounted
pilot valves. The inlet is horizontal. The valves
are installed vertically
Reference
PWR Germany and Brazil,
PWR (VVER)
Size / DN
Up to 8" / up to 200 mm
Class / PN
Class 1500 / PN 250
Body material
1.4553 / 1.4541
Qualification
Areva Laboratory Erlangen with steam, water
and two-phase mixture and Karlstein;
for compact design see APR1400 qualification
Design
Compact block design with directly connected
pilot valves. The inlet angle is 45° so the valves
can be installed in a vertical position
Reference
Reactor type: EPR
Olkiluoto 3, Flamanville 3,
Taishan 1 + 2
Size / DN
4" / 6" / 100 / 150 mm
Class / PN
Class 1500 / PN 250
Body material
Z2 CN 19-10 N2
Qualification
Areva Laboratory Erlangen with steam, water
and two-phase mixture and Karlstein
Design
Compact block design with directly mounted
pilot valves. The valve is installed horizontally
so the inlet is vertical
Reference
Reactor type: APR 1400
Shin Kori 3+4,
Shin Hanul 1+2,
Barakah 1- 4
Size / DN
8" / 200 mm
Class / PN
Up to class 2500 / PN 400
Body material
A182 F316 LN (1.4406)
Qualification
Flow coefficient by NB, USA
Demonstration of function by Areva in Karlstein
with steam, water and two-phase mixture
TYPE VS 99 PRESSURIZER SAFETY RELIEF VALVE
As explained above, each construction of the pressurizer safety relief valve requires an individual solution. The solution is oriented to the
construction of the reactor, the technical demands and the customized specifications. Different solutions for the control, construction and number of
pilot valves also influence the construction of the main valve. The VS99 pressurizer safety relief valve operates according to the discharge principle.
During normal operation, the valve is closed, system pressure is permanently exerted on the top side of the piston and presses the disc firmly to the
seat. In the process, the interior parts are surrounded by medium and so are kept at temperature; thus there is no thermal shock upon opening.
Содержание Sempell PSRV VS99
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