High-pressure ball valves are primarily used to shut off or connect media in pipelines and can also be used for fluid regulation and control. The hard-seal V-type ball valve, with its V-shaped core and carbide-hardened metal seat, provides strong shear forces, making it particularly suitable for media containing fibers and fine solid particles.
1. Core Definition and Operating Principle
Structural Definition
The valve stem rotates 90° around its axis, switching media flow or switching flow direction. It is suitable for high-pressure systems such as hydraulic machinery and natural gas transmission.
The valve body is typically manufactured using a three-stage forging process (forged steel/stainless steel) to ensure structural integrity and eliminate the risk of casting defects.
Sealing Principle
Hard-seal technology: A tungsten carbide layer is spray-welded on the ball surface, and the seat is hard-welded with carbide. Disc spring preload compensates for thermal deformation under high pressure, achieving zero leakage (leakage rate ≤ 100 mm³/s x DN). Floating design: The medium pressure pushes the ball to press against the valve seat. The higher the pressure, the tighter the seal (applicable to diameters ≤ DN50)
2. Performance and technical parameters
| Features | Technical indicators | Applications |
|---|---|---|
| Withstand voltage range | 1.6MPa-50MPa(150LB~3000LB grade) | Ultra-high pressure test bench, deep-sea exploration equipment |
| Temperature adaptability | -196℃~425℃(Deep cold to high temperature) | LNG storage and transportation, high-temperature steam pipelines |
| Sealing form | Metal hard seal (high pressure working conditions) / PTFE soft seal (clean media) | Petrochemical, semiconductor ultrapure water |
3.Applications
- Energy Industry
Oil and gas pipelines: Class 900 and above trunk line shutoff, resistant to hydrogen sulfide corrosion.
LNG storage and transportation: -196°C liquid nitrogen operation, stainless steel valve body to prevent low-temperature embrittlement.
- Specialty Equipment
Hydraulic pump station: 50MPa ultra-high-pressure system, response time ≤ 0.5 seconds.
- Automation Control
Pneumatic/electric actuator drive: Remote opening and closing in explosion-proof environments (e.g., chemical plant reactors)
