Application
Self-acting valve which prevents reverse flow
of the service fluid, for use with water, steam,
on special request also for other non-
aggressive liquids and gases for service
pressures and temperatures:
If tightness is required, it is necessary to
install into pipeline also a shut-off valve,
besides the check valve.
Technical description
The valve is bonnet type. Disc is guided loose
in a bonnet. The disc fits on a seat rolled in the
valve body. Flow direction in the valve is from
under the disc.
Connecting and face-to-face dimensions
Flange connecting dimensions as per
ČSN 13 1060, DIN 2501and ČSN 13 1061.
Face-to-face dimensions as per ČSN EN 558,
DIN 3202 F1.
Basic face-to-face and connecting dimensions
are given in the table.
Material
Body, bonnet
grey cast iron (42 2420, GG-20)
Disc to DN 32 stainless steel (13 Cr)
Disc from DN 40
carbon steel with overlay (13 Cr)
Testing
The valve is tested as per ČSN 13 3060, part 2,
DIN 3230.
Installation
The valve must be installed only in horizontal
pipeline with the bonnet upwards.
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