Products

1. Product Overview

The Axial Flow Check Valve is a highly efficient, energy-saving non-return valve engineered specifically for modern industrial piping networks. This series is widely utilized in pipelines across the petroleum, chemical, and natural gas industries to prevent medium backflow, eliminate destructive water hammer effects, and provide ultimate safety protection for critical downstream equipment like pumps and compressors.

Manufactured in strict accordance with international and domestic standards including API 6D, GB/T 19672, and GB/T 21387, these valves cover pressure ratings from 150Lb to 600Lb (PN2.0 to 10.0MPa). They deliver exceptional mechanical stability and chemical resistance across an extreme temperature range of -46°C to 350°C. Featuring an advanced streamlined venturi body design, this valve ensures ultra-low fluid resistance and pressure drop, making it the ideal choice for sustainable, green industrial fluid control.

2. Product Features

Streamlined Design for Low Pressure Drop and Energy Efficiency

The valve internals feature an advanced streamlined Venturi flow path, ensuring stable fluid dynamics with minimal turbulence. Compared to conventional swing or lift check valves, the axial flow design significantly reduces fluid resistance and pressure drop (Low Pressure Drop). This substantially cuts down pipeline transmission energy consumption and minimizes flow noise, fully aligning with modern energy-saving and environmental standards.

Premium Stellite Hard-Facing for Extended Service Life

Depending on the specific working conditions, the sealing surfaces of the disc and seat can be hard-faced with cobalt-based alloy (Stellite) or designed with a composite combination of non-metallic soft seals and metal-to-metal hard seals. The hard-faced sealing surface offers superior resistance to wear, erosion, and corrosion, maintaining stable performance even under high-temperature and high-pressure environments, which drastically extends the valve’s service life and reduces maintenance costs.

Rapid Low-Pressure Sealing and Zero Leakage Performance

Benefiting from optimized spring-assisted loading technology and high-precision tolerances, the valve exhibits outstanding low-pressure sealing and low-pressure opening capabilities. It responds sensitively and closes rapidly even under minimal differential pressure. The tight sealing architecture achieves Zero Leakage at micro-pressure states, providing a level of sealing reliability that conventional check valves simply cannot match.

Smooth Fast-Closing Operation Without Jamming

The internal axial guiding system, paired with high-performance composite bushings, ensures that the disc maintains perfect axial concentricity during operation, guaranteeing no jamming. The spring pre-load drives the disc to reset rapidly before the fluid can reverse flow. This achieves a silent, non-slam closure that effectively suppresses pipeline water hammer, safeguarding the entire process system.

Versatile End Connections for Customized Project Needs

To adapt to varying global piping installation standards, the end connections offer ultimate flexibility. Users can choose between Flanged Ends or Butt-Welding Ends (BWE) based on pipeline specifications. End dimensions comply strictly with ASME B16.5, ASME B16.25, GB/T 9124.1, and HG/T 20592, ensuring seamless on-site compatibility and installation.

Rigorous Testing and Compliance with International Standards

Every single axial flow check valve undergoes rigorous high-pressure shell strength tests, high/low-pressure sealing tests, and air-tightness testing prior to shipment, in strict compliance with API 6D, API 598, and GB/T 26480. Featuring a well-engineered structure, reliable sealing, and an aesthetically refined appearance, this product is built to provide global energy and chemical sectors with the most trustworthy fluid control solutions.