Pressure Seal Gate Valve Manufacturer

The Pressure Seal Gate Valve is specifically designed for high-pressure and high-temperature applications commonly found in power plants, refineries, and petrochemical industries. Unlike bolted bonnet valves, the pressure seal design uses internal pressure to enhance the seal between the valve body and bonnet, ensuring tight sealing performance and reducing the possibility of leakage. These valves are ideal for steam, superheated water, and other aggressive services.

Typically available in pressure classes 600 to 2500 and sizes ranging from 2” to 24”, pressure seal gate valves are built to standards like ASME B16.34 and API 600. The body materials can include carbon steel (WCB), chrome-moly alloys (WC6, WC9, C12), and stainless steels (CF8, CF8M), suitable for demanding environments. The wedge can be solid, flexible, or split, and is hard-faced to ensure long service life. Rising stems with outside screw and yoke (OS&Y) construction allow clear visual indication of valve position.

Features of Pressure Seal Gate Valve

• Pressure Seal Bonnet Design: Utilizes system pressure to create a tighter seal between the body and bonnet as pressure increases, minimizing leakage.
• High Pressure & High Temperature Service: Ideal for applications in power plants, refineries, and steam systems where conventional bolted bonnets may not perform reliably.
• Compact and Lightweight: Metal-to-metal or soft seat options provide leak-tight shutoff, reducing the risk of system failure.
• Solid, Flexible, or Split Wedge Options:Allows adaptability for different flow conditions, thermal expansion, and sealing requirements.
• Hard-Faced Seating Surfaces: Seats and wedges are often surfaced with materials like Stellite to resist erosion, corrosion, and wear.
• Renewable or Integral Seats: Designed for long service life and ease of maintenance or replacement.
• Low Maintenance: Pressure seal bonnet design reduces the need for frequent tightening and gasket replacement.