Valves
Double Block and Bleed (DBB) Valves
Qisheng Double Block and Bleed (DBB) Valves provide a space-saving and safer alternative to multiple valve manifolds. By integrating two independent seats and a central bleed point into a single valve body, they allow for absolute isolation and safe cavity venting. Designed for high-integrity services in oil refineries and chemical plants, our DBB valves reduce potential leak points, minimize footprint, and fully conform to API 6D fire-safe and anti-static standards.
Floating Ball Valve
The Qisheng Floating Ball Valve provides a simple yet highly effective solution for mid-to-low pressure applications. Utilizing the natural pressure of the medium to push the ball against the downstream seat, it achieves a bubble-tight, zero-leakage seal. Compact, durable, and fire-safe to API 607, these valves are ideal for chemical processing, water treatment, and industrial utilities. Available in forged and cast steel, they feature anti-static protection and an anti-blowout stem for enhanced operational safety.
Fully Welded Ball Valve
Designed for buried services and transmission pipelines, Qisheng’s Fully Welded Ball Valves eliminate potential external leak paths by replacing body-to-bonnet bolting with a high-integrity welded structure. This lightweight yet robust design is ideal for gas distribution, underground networks, and high-pressure transmission. Built with trunnion-mounted internal geometry and DBB capability, it provides maintenance-free operation and exceptional durability in the most demanding environments.
High-Performance Automated Valve Series
Qisheng’s High-Performance Automated Valve series is engineered to provide reliable, intelligent flow control for the most demanding industrial environments. Our comprehensive solutions integrate premium valves—including ball, butterfly, and gate valves—with advanced motor, pneumatic, hydraulic, and gas-over-oil actuators . Featuring high-torque outputs up to 678,000 N.M, emergency shutdown (ESDV) capabilities, and intelligent fieldbus control, these valves are designed for safety and efficiency in oil & gas, chemical, and power industries . Fully compliant with UNI EN ISO 5211 and NAMUR standards, Qisheng automated valves ensure seamless integration and long-term operational excellence.
High-Performance Axial Flow Check Valve
Qisheng’s High-Performance Axial Flow Check Valves are engineered for critical applications requiring low pressure drop and stable dynamic response. Featuring a non-slam design with a spring-loaded disc, these valves react quickly to flow velocity changes, ensuring zero backflow and preventing pressure surges. The streamlined flow path and Venturi effect minimize turbulence and erosion while maximizing pressure recovery. Built to API 6D standards and available in sizes from 2″ to 36″, these valves offer a short pattern design that reduces weight by up to 70% compared to traditional models.
High-Performance Bi-directional Triple Offset Butterfly Valve
Qisheng’s High-Performance Triple Offset Butterfly Valves are engineered to achieve zero leakage in bi-directional applications. The innovative triple offset design completely eliminates friction between the seat and sealing ring during the full 90-degree rotation, ensuring an extended service life and reduced operating torque. These valves feature an intrinsically fireproof all-metal structure and an anti-blowout stem, fully conforming to API 609 and ASME B16.34 standards. Designed for versatility in extreme conditions, they are available in pressure ratings from Class 150 to Class 600 and sizes up to NPS 60.
High-Performance Cast Steel Gate Valve (API 600)
Qisheng’s High-Performance Cast Steel Gate Valves are engineered for heavy-duty industrial isolation in high-pressure and high-temperature environments. Fully compliant with API 600 and ASME B16.34, these valves feature a flexible wedge design, a forged T-head stem, and precision-ground hardened seating surfaces to ensure a bubble-tight seal. Certified to API 624 and ISO 15848-1 for low fugitive emissions, they offer a sustainable and reliable solution for refineries, petrochemical plants, and power generation. Available in sizes up to NPS 60 and pressure ratings from Class 150 to 2500.
High-Performance Cast Steel Globe Valve (BS 1873 / API 623)
Qisheng’s High-Performance Cast Steel Globe Valves are precision-engineered for reliable throttling and leak-tight isolation in high-pressure service. Manufactured to BS 1873 and API 623 standards, these valves feature a body-guided disc to eliminate fluid-induced vibration and a self-aligning, anti-galling stem design for smooth operation. Certified for low fugitive emissions (API 624 / ISO 15848-1), they provide an environmentally safe solution for critical processes. Available in sizes up to NPS 24 and pressure ratings from Class 150 to 2500, Qisheng globe valves are the ideal choice for refineries, power plants, and chemical processing.
High-Performance Cryogenic Ball Valve
Qisheng’s High-Performance Cryogenic Ball Valves are meticulously engineered for extreme low-temperature applications, providing reliable shut-off in environments ranging from -50°C down to -196°C. Available in both Side Entry and Top Entry configurations, these forged steel valves feature advanced soft seating to ensure exceptional, bubble-tight performance in LNG and industrial gas processing. Accommodating sizes up to NPS 24″ and pressure ratings from Class 150 to 1500, our cryogenic ball valves utilize premium materials like PCTFE seats and specialized lip seals to guarantee maximum safety, durability, and operational efficiency in the harshest conditions.
High-Performance Cryogenic Valve Series
Qisheng’s High-Performance Cryogenic Valves are engineered for extreme cold environments, operating reliably at temperatures ranging from -50°C down to -196°C. This comprehensive series—including gate, globe, check, and ball valves—features advanced cryogenic engineering such as extended bonnets for thermal insulation, specialized drip plates to prevent icing, and upstream cavity relief for safety. All key components undergo liquid nitrogen treatment to ensure structural stability. Fully compliant with ISO 28921, BS 6364, and ISO 15848-1 low-emission standards, Qisheng cryogenic valves are the premier choice for LNG terminals, LPG plants, and ethylene processing .
High-Performance Double Offset Butterfly Valve
Qisheng’s High-Performance Triple Offset Butterfly Valves are engineered to achieve zero leakage in bi-directional applications. The innovative triple offset design completely eliminates friction between the seat and sealing ring during a 90-degree rotation, ensuring a longer service life. Built with an intrinsically fireproof all-metal structure and an anti-blowout stem, these valves offer uncompromising reliability. Available in pressure ratings from Class 150 to Class 600 and sizes up to NPS 60 , our valves fully conform to API 609 and ASME B16.34 standards.
High-Performance Dual Plate Check Valve
Qisheng’s High-Performance Dual Plate Check Valve features an advanced retainerless design that completely eliminates external leak paths. Significantly lighter and more compact than conventional swing or lift check valves, it utilizes a highly responsive spring-assisted closing mechanism. This ensures the valve closes as flow velocity approaches zero, providing simultaneous non-slam and no water hammer performance. Designed for extreme conditions with a minimum design temperature of -196°C, these valves fully comply with API 594, API 6D, and BS 6364 standards, making them the ideal choice for Oil & Gas, Refinery, Chemical, and LNG industries.