High-Performance Pressure Balance Type Plug Valve

Qisheng Pressure Balance Type Plug Valve

The Qisheng Pressure Balance Type Plug Valve is a heavy-duty solution designed to overcome the high torque and plug-seizing issues commonly associated with traditional plug valves in high-pressure services. By utilizing an inverted plug design and a pressure balancing mechanism, these valves ensure smooth operation even at differential pressures up to Class 2500. Whether in extreme oilfield conditions or high-stakes refinery pipelines, Qisheng provides the durability and precision required for critical flow control.

Advanced Engineering Advantages

• Pressure Balance Mechanism: The pressure balance design reduces the friction between the plug and the seat, significantly lowering the operating torque and preventing plug abrasion during opening and closing.
• Inverted Plug Design: The inverted plug is treated with advanced surface hardening to enhance wear resistance and ensure a long service life in abrasive or high-velocity media.
• Anti-Blowout Stem: Engineered with a high-safety stem structure that prevents ejection under internal pressure, fully conforming to API 6D and API 599 standards.
• Multiple O-Ring Sealing: Features a sophisticated multi-stage O-ring seal design at the stem to provide superior protection against external leakage.
• Emergency Sealant Injection: Equipped with sealant injection fittings for both the body and the stem, allowing for fast, in-line maintenance to restore tight shut-off in emergency conditions.

Typical Applications

Built for the most demanding environments, the Qisheng Pressure Balance Plug Valve is the preferred choice for:

• Oil & Gas Transmission: High-pressure crude oil and natural gas pipelines.
• Refining & Petrochemical: Critical isolation of slurries, abrasive fluids, and high-temperature hydrocarbon services.
• Offshore Platforms: Compact and rugged isolation for space-constrained and corrosive marine environments.

Technical Specifications

• Design Standards: API 599, API 6D
• Face-to-Face Dimensions: Conforms to ASME B16.10
• Pressure Ratings: ASME Class 150, 300, 600, 900, 1500, 2500
• Size Range: NPS 2″ to NPS 36″
• Sealing Options: Metal-to-metal seating with lubricant assist

Material Configuration