The DN1200 Flange Gate Valve is a heavy-duty isolation valve engineered for large-diameter, moderate-pressure industrial pipeline systems. Featuring a robust flanged connection, it ensures secure integration into critical piping networks requiring reliable on/off service. The valve body, typically constructed from high-strength WCB cast steel, provides exceptional structural integrity and resistance to deformation under load, guaranteeing stable, long-term performance in demanding operating conditions.

This valve utilizes a rising-stem, solid-wedge or flexible-wedge gate design (depending on application specifics), delivering a tight seal with low torque operation. Its full-bore design minimizes pressure drop, making it ideal for large-volume flow control applications where minimal flow restriction is essential. Engineered for durability and smooth operation, it is perfectly suited for systems requiring infrequent cycling but absolute shut-off reliability.

What are the characteristics and biggest advantages of flange gate valve?

Heavy-Duty Construction for Large Diameters:
Specifically designed to handle the structural and operational challenges of DN1200 and larger pipelines, with reinforced body and gate to prevent sagging or bending.

Material Versatility:
Available in standard cast steel (WCB) for general service, or stainless steel (SS304/SS316) for enhanced corrosion resistance in harsh chemical or coastal environments. Other materials can be customized.

Broad Pressure & Size Compatibility:
Conforms to international pressure standards (PN6/10/16, CL150, JIS) and covers a comprehensive size range from DN300 to DN3200, offering a scalable solution for diverse project needs.

Superior Sealing & Leak Prevention:
Precision-machined flange faces ensure a perfect, gasket-sealed joint with the pipeline. The gate and seat surfaces are meticulously finished to achieve bubble-tight shut-off, even after prolonged periods in the closed position.

High-Temperature & Corrosion Resilience:
Suitable for a wide range of media including hot water, saturated steam, and various oils. Selected materials and coatings effectively withstand thermal cycling and corrosive elements, extending service intervals.

Simplified Installation & Low Lifetime Cost:
Standard flanged ends allow for straightforward bolting without specialized tools, significantly reducing installation time and labor. Its robust design ensures exceptional longevity with minimal routine maintenance, leading to reduced total cost of ownership.

Application conditions of flange gate valve:

Water & Wastewater Treatment:
Main isolation and flow control in large-diameter intake, distribution, and discharge lines for raw water, treated water, and sludge.

Power Plants:
Service in cooling water circuits, condenser systems, and auxiliary water/steam lines.

Chemical & Petrochemical Industries:
Isolation of process lines carrying water, steam, or non-aggressive oils in large-scale plants.

Pulp & Paper, Mining, Metallurgy:
On/Off control in large slurry, process water, or effluent pipelines where full bore and reliable sealing are critical.

General Industrial Utilities:
Main header isolation for plant-wide steam, cooling water, or other utility distribution networks.

Note:
Valve body materials and trim options can be customized based on specific media and service conditions. The valve can be fitted with manual gear operators for high-torque reduction or automated with pneumatic/electric actuators for remote control and integration into SCADA or process control systems.