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Specifications:
◎ Material: Carbon Steel, Stainless Steel, Alloy Steel
◎ Design Standards: API 6D, ASME B16.34, EN 13774, GB/T 12237
◎ Nominal Size: NPS 2"~ 48"
◎ Pressure Rate: Class 150~2500, PN 16~420
◎ Temperature Range: -60°C to +425°C
◎ Operator: Manual, Pneumatic, Electric, etc..
◎ Application range: The Spherical Body Ball Valve is suitable for scenes with high pressure, underground burial, heat preservation, limited space, and high sealing reliability. They are widely used in important engineering projects such as gas, heat, petrochemical, and long-distance oil and gas pipelines.
Naishi Spherical Body Ball Valve – Structure & Function
| Component | Description |
| Spherical Valve Body | One-piece forged or fully welded body with a spherical or elliptical contour. Provides uniform stress distribution and compact dimensions. |
| Ball (Ball Core) | Precision-machined ball with mirror-polished surface, ensuring tight and reliable sealing. |
| Seat (Sealing Ring) | Available in soft seal (PTFE, RPTFE, PPL) or metal seal (e.g., Stellite or Inconel hardfacing), providing wear and pressure resistance. |
| Stem | Blowout-proof stem with fire-safe secondary seal, anti-static design, and connection options for handles or actuators. |
| Fully Welded Construction | Welded body without bolted joints minimizes leakage risks—ideal for buried or long-term maintenance-free installations. |
| Insulation Layer (Optional) | External polyurethane foam, rock wool, or fiberglass insulation wrapped with stainless steel or galvanized sheeting. |
| Anti-Corrosion Coating (Optional) | External coatings such as 3PE, FBE epoxy, or PU for underground or harsh environment applications. |
| feature | Benefit |
| Spherical Body Design | Uniform pressure resistance, low stress concentration, high safety for high-pressure pipelines. |
| Welded, Leak-Free Construction | Ideal for gas pipelines and underground systems—long service life with zero external leakage points. |
| Thermal Insulation & Anti-Corrosion Compatible | Smooth external surface allows easy application of insulation and anti-corrosion layers. |
| Excellent Sealing Performance | Self-cleaning, floating or trunnion-mounted ball design ensures tight shutoff and low torque. |
| Compact and Space-Saving | Ideal for valve pits, underground chambers, and confined installations. |
| Fire-Safe & Anti-Static | Standard safety design meets API 6FA / ISO 10497 fire test requirements. |
| Low Maintenance | Fully welded structure with minimal wear parts—designed for continuous, long-term operation. |
Naishi Spherical body ball valves combine structural strength, compact design, and zero-leak performance, making them ideal for high-pressure gas lines, district heating networks, buried pipelines, and energy systems requiring reliable insulation and long-term durability.
