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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Application
Self-acting valve preventing reverse flow of
the service fluid, for use with water, steam,
gases and other non-aggressive liquids, 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 body is a die forging connected with the
bonnet by a screw. Seat sealing surface are
welded with hard welding alloy. Disc is
guided in the body.
Connecting and end-to-end dimensions
Butt-weld end finish as per ČSN 13 1075,
DIN 2559. End-to-end dimensions of are
given in the table.
The valve is available also with flanged ends.
Material
Up to 400°C up to 560°C
Body 11 416 15 128
Seats weld overlay stellite 6
Bonnet, disc stainless steel (13 Cr)
Gland packing expanded graphite
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. Flow
direction must correspond to the arrow on the
valve body. |
