Gate Valve Underground

In modern municipal and industrial pipeline engineering, the reliability of subterranean components is non-negotiable. Our Flanged Gate Valve Gate Valve is specifically engineered to provide superior flow control in buried applications where space is limited and structural integrity is paramount.

By eliminating the requirement for costly concrete valve chambers, this valve offers a streamlined approach to underground utility management. Whether utilized for potable water distribution, irrigation networks, or industrial effluent systems, our gate valve ensures a 100% leak-proof seal and effortless operation over a multi-decade service life.

1.Optimized Subsurface Design

Unlike standard above-ground valves, our underground series is built with a Non-Rising Stem (NRS) configuration. This design ensures that the stem threads remain protected within the valve body and bonnet, preventing exposure to soil contaminants and ensuring the valve's height remains constant during operation-a critical factor for depth-restricted installations.

2.Advanced Resilient Sealing Technology

At the heart of the valve is a high-grade ductile iron wedge, fully encapsulated in high-performance vulcanized rubber (EPDM or NBR). This resilient seated technology guarantees:

Zero-Leakage Sealing: The rubber-to-metal interface compensates for pipeline debris, ensuring a bubble-tight shut-off.

Low Operating Torque: Precision-engineered surfaces reduce friction, allowing for easier manual operation even under high-pressure conditions.

Corrosion Immunity: The full encapsulation prevents the iron core from coming into contact with the fluid, eliminating internal rust.

3.Industrial-Grade Body Construction

Constructed from Ductile Iron (GGG50/ASTM A536), the valve body offers high tensile strength and impact resistance. This allows the valve to withstand the heavy loads of overlying soil and the dynamic stresses of traffic in urban environments.

Keylion® flanged underground gate valves are the industry standard for a wide range of critical applications:

 ◆  Municipal Water Distribution: Main isolation valves for city-wide potable water networks.

 ◆  Industrial Cooling Loops: Sub-surface piping for power plants, refineries, and manufacturing facilities.

 ◆  Agriculture & Irrigation: Reliable control for large-scale buried irrigation mains.

 ◆  Wastewater Management: Isolation of gravity-fed or pressurized sewage lines.

 ◆  Fire Infrastructure: Buried supply lines for hydrants and sprinkler systems in commercial complexes.

Every unit undergoes rigorous testing protocols before leaving our facility:

Seat Leakage Test: Each valve is tested at 1.1x its rated pressure to ensure zero leakage.

Shell Strength Test: Tested at 1.5x rated pressure to verify structural integrity.

Torque Testing: Conducted to ensure compliance with ease-of-operation standards.

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