Visão geral do produto
The KOZO F91 Pressure Seal Butt-Weld Gate Valve is designed for high-pressure and elevated-temperature steam, power and process piping where chromium-molybdenum-vanadium alloy steel and pressure-seal construction are required. The gate provides straight-through isolation with low pressure drop when fully open.
Why F91 Alloy Steel?
F91 is a high-strength ferritic alloy steel used in demanding power-generation and high-temperature process applications. Its creep strength makes it suitable for services where standard carbon steel or lower-alloy materials may not provide adequate long-term performance. Final design limits depend on pressure class, heat treatment, weld procedure, trim, bolting and the applicable piping code.
Principais recursos de design
- Pressure-seal bonnet: Closure joint is energized by internal pressure for high-pressure service.
- Butt-weld ends: Supports welded integration into high-pressure piping systems.
- Wedge gate: Straight-through isolation with low flow resistance when fully open.
- Bevel-gear operation: Provides controlled manual operation for larger sizes or higher torque.
- F91 alloy-steel body: Reference material for high-temperature, high-pressure applications.
Especificações Técnicas
| Tipo de válvula | Pressure Seal Gate Valve |
|---|---|
| Size Range | 2 in – 36 em |
| Pressure Classes | ASME Class 150 – 2500 |
| Material do corpo | F91 Alloy Steel |
| Terminar conexão | Solda de topo |
| Operação | Bevel Gear |
| Design Standard | API 600 / ASME B16.34 |
| Face-to-Face | ASME B16.10 |
| Butt-Weld Ends | ASME B16.25 |
| Inspection & Testing | API 598 |
Aplicações Típicas
- Power-generation steam lines
- High-pressure utility systems
- Refinery and petrochemical service
- Boiler and superheated-steam systems
- High-temperature process isolation
Selection Notes
The operating-temperature limit should be determined from the complete valve design, classe de pressão, trim, packing, bolting and applicable code rather than from F91 material capability alone. Welding procedure and post-weld heat treatment requirements should also be reviewed for butt-weld installations.
Configurações disponíveis
Size, classe de pressão, trim, bypass arrangement, operator and testing requirements can be selected to suit the project specification.
Como especificar esta válvula
Please provide size, classe de pressão, pressão de projeto, temperatura de projeto, piping material, weld-end preparation, médio, trim, operator and applicable project standards.
Perguntas frequentes
Why use a pressure-seal bonnet?
Pressure-seal construction is widely used in high-pressure service because internal pressure increases the sealing load of the bonnet joint.
Why use butt-weld ends?
Butt-weld connections reduce the number of flanged joints and are commonly specified in high-pressure, high-temperature piping systems.
