Technical description
Body made of open-die forging, yoke welded from steel, joined by a bonnet joint. Seats pressed into the body and secured with a seal weld. Sealing surfaces of the seats and wedge hard-faced with a cobalt-free hard-facing alloy (or cobalt alloy). Stem packing and bonnet joint sealing ring made of asbestos-free material. Operated by an electric actuator located outside the containment (or in normal design). The gate valves have an opening for removing the packing under pressure and can be equipped with a bypass.
Image gallery
Drawings and dimensions
Application
Quick-acting shut-off valve for water, steam, gases and other media, particularly in secondary circuits of nuclear power plants, but also in conventional power plants and heating plants, seismically resistant, for the operating parameters given in the table.
Operation
Testing
The gate valves are tested with demineralised water for strength and tightness at a minimum of 1.6 times Pp, for operability and seat tightness at Pp (for gas – seat tightness with air at 0.6 MPa). The body-to-flange weld is inspected by radiography and ultrasound.
Installation
The gate valves can be installed in any position regardless of the flow direction of the working medium. Electric actuators are connected to the valve according to ISO 5210 and DIN 3338. It is recommended to install the gate valves in horizontal piping with the stem vertical and the actuator on top.
Connection
Butt-welded according to ČSN and GOST standards. The gate valves are supplied with ZPA Pečky electric actuators; actuators from other manufacturers can be supplied on special request.
Documentation
Operating parameters
| PN | Temperature (°C) | |||||
|---|---|---|---|---|---|---|
| 200 | 226 | 250 | 256 | 300 | 350 | |
| Body material | ||||||
| 11416 | ||||||
| Operating pressure MPa | ||||||
| 63 | 5,02 | 4,62 | 4,44 | 4,4 | 3,9 | 3,3 |
| 100 | 7,36 | 7,1 | 6,9 | 6,84 | 6,44 | 5,98 |
| 160 | 9,25 | 8,95 | 8,68 | 8,61 | 8,11 | 7,54 |
Materials of main parts
| Pos. | Part identification | Material | |
|---|---|---|---|
| 054 | Sealing ring | Exp. graphite | |
| 053 | Seal | Exp. graphite | |
| 044 | Bolt | 15320 | |
| 042 | Nut | 11 | |
| 033 | Stem nut | 11416.1-42 3046 | |
| 015 | Stem | 14X17H2 | |
| Hard facing | C1111 | ||
| 017 | Wedge | 11416, 15128 | 08X18H10T |
| 014 | Cover | 11 416 | 08X18H10T |
| Hard facing | C1111 | ||
| 001 | Body | 11 416 | 08X18H10T |
Dimensions
| DN/d | Pp (MPa) | PN | B + C | D (max) | H | L | V 1 | kg |
|---|---|---|---|---|---|---|---|---|
| 450/400 | 6,5 | 100 | 975 | 460 | 325 | 1000 | 2410 | 2360 |
| 9,0 | 160 | 840 | 2410 | 2360 | ||||
| 400/330 | 12 | 160 | 911 | 443 | 300 | 1000 | 2065 | 2426 |
Other
Hotline
Do you need advice on choosing a valve, want to order spare parts or need a service visit? Call or write to us – our engineers and sales staff will be happy to help and propose the most suitable solution.