Technical description
Body made of closed-die or open-die forging, cast yoke, joined by a bonnet joint; for DN 200 – 250 and Pp up to 4 MPa with a sealing ring, for others without an inserted seal. 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. Stem packing and bonnet joint sealing ring made of asbestos-free material. Operated by an electric actuator located inside or outside the containment. They have an opening for removing the packing under pressure.
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Drawings and dimensions
Application
Quick-acting shut-off valve intended for radioactive water, steam, gases and all other media, particularly in primary circuits of nuclear power plants and chemical plants, for installation inside or outside the containment (HZ), seismically resistant, for the operating parameters given in the table. DN 125/150 gate valves are intended mainly for the pressuriser system piping, DN 300/350 gate valves for the emergency core cooling system (ECCS) piping.
Operation
Operated by an electric actuator.
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) and for vacuum tightness with helium at a vacuum of 10.6 Pa. No indication greater than 1.104 Pa.l.s-1 is permitted. The body-to-flange weld is inspected by radiography and ultrasound.
Installation
The gate valves are installed in horizontal piping regardless of the flow direction of the working medium, with the stem vertical, the electric actuator on top and the motor axis horizontal. The electric actuator is connected to the valve according to ISO 5210 and DIN 3210.
Connection
Butt-welded according to ČSN and GOST standards. The gate valves can be supplied with electric actuators from ZPA Pečky, AUMA and Rotork.
Documentation
Operating parameters
| Pp (MPa) | Temperature (°C) | ||||
|---|---|---|---|---|---|
| 250 | 250 | 300 | 335 | 350 | |
| Body material | |||||
| 11 416 | 08Cr18Ni10Ti | ||||
| Operating pressure MPa | |||||
| ÷ 4 | 2,5 | 2,5 | - | - | - |
| 4 | 4 | - | - | - | |
| 9,2 ÷ 14 | - | - | 11 | 14 | - |
| 14 ÷ 20 | - | - | 20 | - | 18 |
Materials of main parts
| Pos. | Part identification | Material | Pos. | Part identification | Material |
|---|---|---|---|---|---|
| 104 | Bridge | 26 | 042 | Nut | 11416 |
| 128 | Electric actuator | 150 | Tube | 08X18H10T | |
| 107 | Coupling | 12 | 084 | Ring | 08X18H10T |
| 125 | Insulation ring | IT | 036 | Bush | 08X18H10T |
| 105 | Flange | 11 | 013 | Sealing cover | 11416 |
| 060 | Bearing | ČSN 024720 | 033 | Stem nut | 11416 / 423046, 47 |
| 061 | Bearing | ČSN 024730 | |||
| 064 | Lubricator | ČSN 027410 | 012 | Yoke | 11416 |
| 054 | Sealing ring | Exp. graphite | 015 | Stem | 14X17H2 |
| 095 | Seal | ||||
| 086 | Nut | 15 - ČSN 131530 | Hard facing | TYPE C1111 | |
| 083 | Nut | 15 - ČSN 131530 | 017 | Wedge | 08X18H10T |
| 048 | Nut | 17134 | 030 | Wedge guide | 17027.4 |
| 081 | Screw | 15 | 014 | Cover | 08X18H10Т |
| 082 | Screw | 15 | Hard facing | TYPE C1111 | |
| 044 | Bolt | XN35BT | 004 | Seat | 08X18H10T |
| 088 | Plug | 08X18H10T | 001 | Body | 08X18H10T |
Dimensions
| DN/d | Pp (MPa) | B + C | D (max) | H | L | V | Closing time [s] | kg |
|---|---|---|---|---|---|---|---|---|
| 125/110 150/110 | 18 | 933 | 165 | 130 | 560 | 1283 | 10 | 546 |
| 200/170 | 2,5 | 685 | 229 | 155 | 550 | 1170 | 18 | 300 |
| 4 | 685 | 9 | 315 | |||||
| 200/140 | 14 | 933 | 251,5 | 650 | 1395 | 12,8 | 528 | |
| 250/200 | 14 | 1060 | 284 | 235 | 800 | 1875 | 13 | 1425 |
| 250/225 | 4 | 933 | 650 | 1630 | 15 | 970 | ||
| 300/225 | 11 | 1060 | 337 | 900 | 1940 | 5,8 | 1465 | |
| 300/350/265 | 18 | 1060 | 355 | 270 | 990 | 2305 | 11,5 | 2060 |
| DN/d | Pp (MPa) | B + C | D (max) | H | L | V | Closing time [s] | kg |
|---|---|---|---|---|---|---|---|---|
| 125/110 150/110 | 18 | 777 | 165 | 130 | 560 | 1225 | 13 | 431 |
| 200/170 | 2,5 | 664 | 229 | 155 | 550 | 1200 | 18 | 275 |
| 4 | 11,3 | |||||||
| 200/140 | 14 | 777 | 251,5 | 650 | 1400 | 12,8 | 413 | |
| 250/200 | 14 | 896 | 284 | 235 | 800 | 1840 | 15 | 1417 |
| 250/225 | 4 | 777 | 650 | 1572 | 18,2 | 855 |
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