Product Description

Product Overview

The Cast Steel Lift Check Valve Flange Type WCB Non-return Valve is meticulously engineered to provide reliable anti-backflow protection for demanding pipeline systems. Designed to automatically prevent the reverse flow of fluids, this essential component safeguards critical equipment such as pumps and compressors from potential mechanical damage and process contamination. Constructed from premium WCB cast steel, the valve body delivers high structural integrity and mechanical strength, ensuring long-term operational stability even in high-stress industrial environments. By integrating a precisely machined disc and a durable lifting mechanism, this non-return valve guarantees swift closure upon flow reversal, effectively minimizing water hammer effects and maintaining overall system safety for engineering projects. 

Material and Specification Insights

Our cast steel lift check valves are manufactured in strict compliance with industry-leading standards, including GB/T 12236 and GB/T 12235 for design, and GB/T 13927 for rigorous pressure testing. To accommodate diverse industrial procurement requirements, the valve is available in multiple high-grade material configurations such as WCB, WC6, LCB, and CF8. This versatile material selection allows the valve to perform reliably across a wide spectrum of operating temperatures—ranging from cryogenic conditions of -46℃ up to high-temperature environments of 550℃. Whether handling standard mediums like water and steam, or specialized fluids such as nitric acid, propane, and industrial oils, the tailored material options ensure superior corrosion resistance, thermal stability, and prolonged service life, thereby significantly reducing maintenance costs and procurement risks.

Main Features

• Compact and small structure: Engineered with a space-saving footprint, this lift check valve is highly suitable for pipeline layouts where installation space is limited. The streamlined design not only facilitates easier handling and installation but also reduces the overall weight load on the piping system.

• Good sealing performance under low pressure: Featuring an optimized seating surface and a precision-guided disc, the valve achieves a tight, reliable seal even in low-pressure conditions. This ensures zero leakage and prevents fluid backflow during system startups or low-flow operations.

• Can be installed in horizontal and vertical pipelines: Offering high installation flexibility, the internal mechanism is designed to function effectively regardless of orientation. This adaptability simplifies engineering design and accommodates complex pipeline routing requirements.

• Quick response for backflow prevention: The lightweight disc and short stroke distance enable an immediate response to flow changes. This rapid closure mechanism significantly mitigates the destructive forces of water hammer, protecting upstream equipment and ensuring continuous system integrity.

Application

• Small‑bore pump outlet lines: Highly recommended for installation at the discharge side of small-bore pumps, acting as a critical barrier to prevent reverse rotation and mechanical damage caused by sudden fluid backflow when the pump shuts down.

• Oil and compressor piping: Highly suited for petrochemical and gas processing applications. The heavy-duty cast steel construction and specialized sealing materials safely manage oils, propane, and compressed gases without compromising performance or safety.

• Pipes with upward medium flow: Ideal for vertical pipeline sections where the medium flows upwards. The design leverages gravity and fluid dynamics to ensure prompt and secure closure the moment the upward pressure drops.

• Working conditions requiring tight anti‑backflow: A dependable choice for critical industrial processes that demand strict unidirectional flow. Whether in power generation, chemical processing, or water treatment facilities, this valve provides the necessary isolation to maintain process purity and operational safety.

Precision Valve Manufacturing

Professional Valve Manufacturer | Integrated Manufacturing

Raw Material

We select high-quality raw materials according to product specifications and international standards. All incoming materials are carefully inspected to ensure chemical composition, mechanical properties and traceability.

Forging & Casting

Advanced forging and casting processes are used to produce strong and reliable valve bodies and components. Strict process control ensures uniform structure, dimensional accuracy and excellent mechanical performance.

CNC Machining

Our CNC machining equipment provides precise and consistent processing of valve components. Critical dimensions, threads and sealing surfaces are strictly controlled to ensure accurate assembly and reliable sealing performance.

Shot Blasting & Coating

Valve surfaces are professionally shot blasted to remove rust, scale and impurities. Protective coatings are then applied according to customer requirements, providing excellent corrosion resistance and a durable surface finish.

Pressure Testing

Every valve undergoes strict pressure testing before shipment. Body and seat tests are performed according to applicable standards and customer specifications to verify pressure resistance and sealing reliability.

Quality Inspection

Our quality control team conducts comprehensive inspections throughout the production process. Finished valves are checked for dimensions, appearance, materials, pressure performance and overall quality before final approval and shipment.