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Check Valve

Check Valves for Various Industries

Our check valves comply with leading industry standards such as API 6D and BS 1868. They cover a full range of configurations, including swing, lift, wafer, and double-disc types, and are suitable for a wide range of operating conditions—from standard pipelines to cryogenic environments as low as -196°C and high-temperature environments up to 600°C—providing stable and reliable protection against backflow in industrial systems.

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FAQ

Does this check valve comply with the BS 1868 standard?‌

The entire product line is designed to be fully compatible with the BS 1868 standard. We can provide corresponding compliance certificates to meet the procurement requirements for industrial projects in Europe.

What is the applicable standard for wafer-type check valves?‌

Wafer-type check valves are designed in strict accordance with the API 594 standard. Their slim, lightweight construction is ideal for pipeline installations with limited space.

What are the typical applications for axial-flow check valves?

The axial-flow design features a smoother flow path and lower resistance at high flow rates, making it suitable for pipeline locations—such as pump outlets—that require rapid check valve response.

What is the difference between internal-shaft and external-shaft designs?‌

Internally mounted shafts have no exposed parts, reducing direct erosion of the shaft by the medium; externally mounted shafts allow for online maintenance and lubrication without disassembling the valve body, accommodating various operational and maintenance needs.

Can check valves effectively mitigate water hammer in pipelines?‌

An optional slow-closing, noise-reducing configuration is available. By extending the closing time, it reduces the impact force, effectively mitigating destructive water hammer during start-up and shutdown cycles to protect downstream equipment.

FAQ
Why FLOWORK

5 Core Performance Advantages of Industrial Check Valves

‌1. Multi-standard Compliance‌: The entire product line is designed based on the API 6D framework and is simultaneously compatible with the BS 1868 standard. The wafer-type structure complies with the API 594 standard, directly meeting the standard access requirements for projects in various regions.

‌2. Low-Resistance Full-Bore Design‌: When fully open, the flow path is flush with the pipeline with no protrusions, preventing additional energy losses during transportation and allowing standard pigging tools to pass smoothly through long-distance pipelines.

‌3. Slow-Closing, Shock-Resistant Design‌: By optimizing the valve disc counterweight and stop design, the impact force during valve closure is significantly reduced, effectively mitigating destructive water hammer during start-up and shutdown cycles to protect downstream pumps and pipeline equipment.

‌4. Self-tightening, Zero-Leakage Seal‌: The valve disc and seat feature high-precision matched sealing surfaces that automatically compress and seal under pressure when the medium flows backward. This ensures zero reverse leakage even after long-term, frequent opening and closing, preventing system failures caused by medium backflow.

‌5. Flexible, Customizable Configuration Options‌: The shaft mounting configuration can be selected as needed to accommodate the requirements of different media applications. Core moving parts undergo wear-resistant hardening treatment, eliminating the need for frequent disassembly and replacement of components during long-term operation.

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