Note
Guaranteed discharge factor = 0,25 for gases and steam
= 0,08 for liquids
P max - maximum opening overpressure [MPa]
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Application
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:
Opening overpressure can be set from 0,03 MPa.
Technical description
The gastight design of the valve has 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.
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 16 on inlet, for PN 10 on outlet.
Basic face-to-end and connecting dimensions
are given in the table.
Material
Body, cover carbon steel (42 2643)
Top cover grey cast iron (42 2420)
Disc, guide bush stainless steel (13 Cr)
Seat weld overlay (13 Cr)
Spring special steel
Testing
The valve is tested as per ČSN 13 3060, part 2
DIN 3230.
Installation
The valve must be installed in vertical
position with the thrust pin above the disc.
Operation
Automatically operated by service pressure
on the disc.
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