High-Performance Cast Steel Gate Valve (API 600)

Qisheng High-Performance Cast Steel Gate Valve

The Qisheng Cast Steel Gate Valve is the cornerstone of safe and efficient pipeline isolation in heavy industrial sectors. Strictly designed and manufactured to API 600 standards, our gate valves are built to withstand extreme thermal cycles and high-pressure differentials. Combining advanced material science with precision engineering, these valves offer zero-leakage performance and industry-leading fugitive emission control, ensuring compliance with the most stringent environmental regulations worldwide.

Core Engineering & Design Advantages

• Flexible Wedge & Forged T-Head Stem: The flexible wedge design compensates for seat distortion due to temperature fluctuations, while the high-strength forged T-head stem ensures reliable disc-to-stem connectivity even under maximum pressure loads.
• Low Fugitive Emissions: Our valves are specifically designed and certified to meet API 624 and ISO 15848-1 standards. The advanced packing system significantly reduces VOC leaks, protecting the environment and ensuring site safety.
• Precision-Ground Seating: Seating surfaces are hard-faced (13Cr, Stellite, or Monel) and precision ground/lapped to a mirror finish, achieving superior seat tightness and resistance to erosion.
• Seal-Welded Seat Rings: To eliminate potential leak paths behind the seat, Qisheng uses seal-welded seat rings as a standard for high-integrity applications, ensuring the body-to-seat joint remains leak-free.
• Reduced Operating Torque: Features a polished stem with precision-machined ACME threads and a self-aligning gland flange to minimize friction and prevent stem scratching during operation.

Typical Applications

Qisheng Gate Valves are optimized for critical isolation service across diverse high-stakes industries:

• Refineries & Petrochemical: Ideal for crude distillation units, catalytic cracking, and high-temperature chemical processing.
• Power Generation: Trusted for steam isolation, cooling water systems, and high-pressure boiler feed applications.
• Oil & Gas Transmission: Used in pipeline terminals and manifold systems where robust isolation is mandatory.

Technical & Operating Specifications

Manufactured to global excellence standards, our gate valves ensure seamless integration into existing infrastructure.

• Design Standards: API 600, ASME B16.34
• Fugitive Emission Standards: API 624 / ISO 15848-1
• Face-to-Face Dimensions: ASME B16.10
• Pressure Ratings: Class 150, 300, 600, 900, 1500, 2500
• Size Range: NPS 2″ to NPS 60″
• End Connections: Flanged (ASME B16.5 / B16.47) and Butt-Weld (ASME B16.25)

Comprehensive Material Configuration

Qisheng offers a range of NACE-compliant materials to handle varying fluid types and temperature ranges: