Underground Radiation type Welded ball valve

Fully Welded Underground Ball Valve - Product Overview

The Fully Welded Underground Ball Valve is a high-performance valve specifically designed for buried pipelines, widely used in natural gas, oil & gas, chemical, and municipal gas systems. Its fully welded body eliminates bolted connections, ensuring long-term leak-free operation underground. The valve is operated via an extended stem or gear mechanism, allowing ground-level control and remote operation.

Working Principle

The valve operates by rotating a hollow spherical ball with a bore through the flow path.

• When the valve is open, the bore aligns with the pipeline, allowing fluid to pass with minimal pressure drop.
• When the valve is closed, the ball rotates 90°, blocking the flow completely.
• The floating ball design ensures tight sealing under pressure, while trunnion-mounted options are available for larger diameters and higher pressures.
• Extended stems transmit the torque from the ground-level operator to the underground ball, ensuring precise control.

Material Selection

• Body Material: Carbon Steel, Low-Temperature Steel, Stainless Steel, Duplex Stainless Steel — selected based on pressure, temperature, and media compatibility.
• Ball Material: Stainless Steel or Duplex Stainless Steel for corrosion resistance and durability.
• Seat Material: PTFE, PEEK, or Metal-to-Metal sealing, chosen according to operating temperature, pressure, and chemical compatibility.
• Stem & Sealing: High-strength stainless steel with anti-corrosion coating; packing material selected for leak-proof performance in buried conditions.

Key Features & Functions

• Fully Welded Body: Eliminates potential leak points and increases pressure resistance.
• Reliable Sealing: High-performance seats ensure zero leakage under high pressure.
• Extended Stem Operation: Manual, hydraulic, or pneumatic control from ground level.
• Corrosion Resistant: Epoxy coating or polyethylene wrapping protects against soil corrosion.
• Low Maintenance: Simplified internal structure reduces servicing requirements.
• Emergency Shutoff: Enables fast closure for pipeline safety.
• Long-Term Underground Use: Designed to withstand harsh soil and buried conditions for decades.

Applications

• Natural Gas Transmission Pipelines
• Oil & Chemical Pipeline Systems
• Municipal Gas Networks
• Long-Distance Buried Pipelines

Why Choose Our Fully Welded Underground Ball Valve

1. Expertise & Quality: Years of experience in underground valve manufacturing.
2. High Reliability: Fully welded design combined with premium materials ensures leak-free performance.
3. Customizable: Designed for specific pipeline sizes, pressures, and media.
4. Technical Support: Comprehensive installation, operation, and maintenance support.