Operation
Automatically operated by service pressure on the disc.
Note
Guaranteed discharge factor = 0,25 for gases and steam
= 0,08 for liquids
Maximum opening overpressure = 1,60 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:
Maximum opening overpressure is 1 MPa when used with steam boilers. Opening
overpressure can be set between 0,03 MPa to
1,6 MPa for all diameters.
Technical description
The gastight design of the valve has a raising lever for in-service testing of the
valve. Closing disc fits in a rolled seat 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, top cover
grey cast iron (42 2420)
Disc, guide bush stainless steel (13 Cr)
Seat ring stainless steel (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.
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