Safety valve designed to protect pressure
vessels and other pressure equipment against
exceeding specific pressure level for steam,
air, non-aggressive liquids and gases for
service pressures and temperatures:
The valve is of gastight design with a raising
lever for in-service testing of the valve.
Closing disc fits in a sealing surface welded in
the body. The disc is pressed into the seat by a
thrust pin, which is forced down by a spring.
For higher temperatures, there is a special
insert placed between the body and the spring
cover. Flow direction in the valve is from
under the disc.
Connecting and face-to-end dimensions
Flange connecting dimensions as per
ČSN 13 1060 and ČSN 13 1061, DIN 2501,
for PN 250 on inlet, for PN 40 on outlet.
Basic face-to-end and connecting dimensions
are given in the table.
Body, cover carbon steel (42 2643)
Disc stainless steel (13 Cr)
Seat weld overlay (13 Cr)
Spring special steel
The valve is tested as per ČSN 13 3060, part 2
The valve must be installed in vertical
position with the thrust pin above the disc.
Automatically operated by service pressure
on the disc.
P max - maximum opening overpressure [MPa]