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.
The valve is intended mainly for vertical
delivery pump pipelines. Closing disc fits into
sealing surfaces welded in the body. The disc
is seated in double guide. Top guide is inserted
loose, bottom guide is a part of the 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 and ČSN 13 1061, DIN 2501.
Basic face-to-face and connecting dimensions
are given in the table.
Body, yoke carbon steel (42 2643, GS-C25)
Disc guide carbon steel
Disc stainless steel (13 Cr)
Sealing surface weld overlay 13 Cr
Guide sleeves ČSN 02 3499
The valve is tested as per ČSN 13 3060, part 2,
The valve must be installed only into vertical
pipeline with the inserted guide upwards.
The valve is self-acting, using the pressure of
the service fluid on the disc, which closes to
prevent reverse medium flow.