Installation
The valve must be installed only into vertical pipeline with the inserted
guide upwards.
Operation
The valve is self-acting, using the pressure of the service fluid on the disc,
which closes to prevent reverse medium flow.
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Application
Self-acting valve which prevents reverse flow
of the service fluid, suitably mainly for use in
delivery pipeline of centrifugal pumps. 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 disc sits on welded sealing surface in the
body pump pipelines. The disc is seated in
two guides. The position of the disc controls
the relief valve, which closes or opens flow
through the relief channel. Minimum amount
of released fluid is determined by a throttling
orifice plate, which size depends on current
flow and pressure ratios.
Connecting and face-to-face dimensions
Flange connecting dimensions as per
ČSN 13 1060 and ČSN 13 1061, DIN 2501.
Face-to-face dimensions as per ČSN EN 558,
DIN 3202 F1.
Relief channel connecting flange as per
PN 40.
Basic face-to-face and connecting dimensions
are given in the table.
Material
Body carbon steel (42 2643, GS-C25)
Disc guide carbon steel
Disc stainless steel (13 Cr)
Orifice plate REAL 096
Expander carbon steel
Testing
The valve is tested as per ČSN 13 3060, part 2,
DIN 3230. |
