Vertical check valve with automatic relief
Z 40 117-540 PN 40

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

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
bodypump 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.

Body carbon steel (42 2643, GS-C25)
Disc guide carbon steel
Disc stainless steel (13 Cr)
Orifice plate REAL 096
Expander carbon steel

The valve is tested as per ČSN 13 3060, part 2,
DIN 3230.

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