Technical description
Body made of open-die forging with a bonnet joint and sealing ring. Seat pressed into the body and secured with a seal weld. Sealing surfaces of the seat and disc hard-faced with a cobalt-free hard-facing alloy. Bonnet joint sealing ring made of expanded graphite. Self-acting operation of the check valve. The valves are equipped with closed-position signalling. Supplied according to special technical specifications.
Image gallery
Drawings and dimensions
Application
Self-acting valve preventing the backflow of water in the piping of the multiple forced circulation circuit of power units with RBMK reactors, seismically resistant, for operating parameters of 11 MPa 300 °C.
Operation
Testing
The valves are tested with demineralised water for strength and tightness at a pressure of 15 MPa and for seat tightness at a pressure of 10 MPa.
Installation
The valves are installed in horizontal piping. Check valves with the hinge pin in a horizontal position.
Connection
Butt-welded according to ČSN and GOST standards.
Documentation
Materials of main parts
| Pos. | Part identification | Material | |
|---|---|---|---|
| Without lining | With lining | ||
| 194 | Disc | 22K | 08Х18Н10Т |
| Hard facing | ANTINIT DUR 500 – TYPE C 1111 | ||
| 004 | Seat | 22K | |
| Lining | - | ER 309L, ER 316L | |
| 001 | Body | 22K |
Dimensions
| DN | Pp (MPa) | B | D (max) | L | V | kg |
|---|---|---|---|---|---|---|
| 800 | 11 | 1190 | 840 | 835 | 940 | 1598 |
Other
Hotline
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