By type: Special valve
Through conduit valve
| Nominal diameter (mm) | 850 |
|---|---|
| Pressure class | 300 lbs. |
| Materials | JIS SCPH61 |
High-capacity flow meters (orifice block)
| Nominal diameter (mm) | 400–650 |
|---|---|
| Pressure class | 2000–2500 lbs. |
| Materials | Carbon steel (JIS, ASME and ASTM standards) |
Low-temperature reheat steam pipe water pressure stop valve (isolation devices)
| Nominal diameter (mm) | More than 1,000 based on field-proven results |
|---|---|
| Pressure class | Determined individually according to design pressure and temperature |
| Materials | Carbon steel (JIS, ASME and ASTM standards) |
Needle valve for low and medium differential pressures
| Nominal diameter (mm) | 15–200 |
|---|---|
| Pressure class | 150–4500 lbs. |
| Materials | Carbon steel, Cr-Mo steel, stainless steel (JIS, ASME and ASTM standards and interpretation of technical standards for steel for thermal power generation equipment) |
Needle valve for high differential pressures
| Nominal diameter (mm) | 15–200 |
|---|---|
| Pressure class | 1500–4500 lbs. |
| Materials | Carbon steel, Cr-Mo steel, stainless steel (JIS, ASME and ASTM standards and interpretation of technical standards for steel for thermal power generation equipment) |
Fuel transfer pipe gate valve
| Nominal diameter (mm) | 500–550 |
|---|---|
| Pressure class | 150 lbs. |
| Materials | JIS SCS13A |
Main steam isolation valve
| Nominal diameter (mm) | 600–750 |
|---|---|
| Pressure class | 600–900 lbs. |
| Materials | JIS SCPL1, JIS SCPH2 |
Main steam check valve
| Nominal diameter (mm) | 650–750 |
|---|---|
| Pressure class | 600–900 lbs. |
| Materials | JIS SCPH2 |
Safety injection system check valve
| Nominal diameter (mm) | 300 |
|---|---|
| Pressure class | 1550 lbs. |
| Materials | JIS SCS 14A |