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 certain
aggressive media after agreement with the
supplier), for servicepressures 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 and fits in a sealing surface 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
ÈSN 13 1060, DIN 2501and ÈSN 13 1061.
Face-to-face dimensions as per ÈSN EN 558,
DIN 3202 F1.
Basic face-to-face and connecting dimensions
are given in the table.
Material
Body, bonnet, disc bronze
Testing
The valve is tested as per ÈSN 13 3060, part 2,
DIN 3230.
Installation
The valve must be installed only in horizontal
pipeline with the bonnet upwards.
Operation
The valve is self-acting, using the pressure of
the service fluid on the disc, which closes to
prevent medium reverse flow.
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