High Pressure, Pressure Seal Bonnet
Pressure Seal Gate Valve
Engineered for the most extreme pressure-temperature combinations in power generation
The pressure seal design uses system pressure to increase the bonnet joint seal force — the higher the pressure, the tighter the seal. This makes it the preferred valve for high-pressure steam, boiler feedwater, and supercritical power plant applications where gasketed bonnet designs fail.
ASME B16.34ISO 9001IBRCE PEDAPI 598
Technical Specifications
| Size Range | NPS 2″ – 24″ / DN 50 – 600 |
| Pressure Rating | Class 600 – 4500 / PN 100 – 720 |
| Temperature Range | -29°C to +650°C |
| Body Material | WC6, WC9, C12A, F91, F22 |
| Seat Material | Stellite® Gr.6 hardfaced |
| End Connection | Butt-Weld, RF Flanged |
| Design Standard | ASME B16.34, API 600 |
| Testing Standard | API 598, EN 12266-1 |
Key Features
- Self-energizing pressure seal bonnet — sealing improves with pressure
- Stellite® hardfaced seating surfaces for extended erosion resistance
- Yoke-integral body design for superior stem alignment
- Available with bypass and drain connections for warm-up
- Full IBR compliance for Indian power sector requirements
Industry Applications
Supercritical power plantsBoiler feedwaterMain steam isolationTurbine bypassHigh-pressure steam headers
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