Valves and Chokes | Flexible Wedge Gate Valves, Rising Stem
Destination: This valves are used as industrial fittings within low pressure installations up to 25 bar.
Working medium: water, steam, gases, petroleum products and other similar fluids, with low corrosion, exclusive hydrogen, mixtures of hydrogen, as well as aggressive mediums with sulphur or sulphuretted hydrogen.
Working temperature: -10 ÷ 225oC
Contents:
1. Body OTA20/STAS 9277
2. Sealing ring 17%Cr
3. Seat OTA20 / STAS 9277
4. Stem 13%Cr
5. Gasket Marsit MU 275-500
6. Cover OTA20 / STAS 9277
7. Gasket nonasbest
8. Handwheel subassy
9. Stud bolt IC45/SR EN10083
10. Nut IC45/SR EN10083
Technical and constructive characteristics
| PN bar |
DN mm |
L mm |
H mm |
d1 mm |
d2 mm |
n x d3 | D mm |
b mm |
Net weight |
| 25 | 200 | 400 | 1000 | 360 | 310 | 12x26 | 600 | 30 | 175 |
| 250 | 450 | 1173 | 425 | 370 | 12x30 | 600 | 32 | 290 |
Working and constructive characteristics
About constructive features, the product is designed in accordance with DIN 3352:
- construction length: DIN 3202-F5 (PN 25);
- connecting flanges: DIN 2501, part 1;
- sealing surfaces: DIN 2526, "C" type;
- sealing: 17% Cr/ 17% Cr;
- body: straight with flanges;
- closing element: flexible wedge gate;
- actuating stem: rising, with thread;
- mounting position: indifferent;
- closing achieved by means of handwheel.
Working and testing regime
| Nominal pressure, bar | Temperature,°C | Testing pressure, bar | |||
| 120 | 200 | 250 | Strength | Tightness | |
| Max. working pressure, bar | |||||
| 25 | 25 | 22 | 20 | 38 | 28 |