Flange Type Silent Check Valve China Factory and Leading Suppliers

Flange Type Silent Check Valve China Factory and Leading Suppliers

High-performance Flange Type Silent Check Valve from a trusted China factory. Designed to API 594, flange dimensions ASME B16.1/EN1092, and tested to API 598/EN12266. Available in sizes up to 12 inches from leading industrial suppliers.



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The Flange Type Silent Check Valve is a high-performance industrial solution engineered to prevent backflow while eliminating the hydraulic shock and noise associated with traditional check valves. Designed for versatility and durability, this valve ensures a smooth transition in fluid flow, protecting your piping system from water hammer and extending the operational lifespan of connected equipment.

Strictly adhering to global standards including API 594 and ASME B16.1, our silent check valves are crafted from premium ductile iron and stainless steel. Available in sizes up to 12", these valves provide a leak-proof seal and exceptional structural integrity, making them an ideal choice for demanding applications in the general equipment and valve manufacturing sectors.

Detailed Parameters

Design StandardAPI 594Flange DimensionsASME B16.1 / EN1092
Test StandardAPI 598 / EN12266Maximum SizeUp to 12" (DN350)
Body MaterialDuctile IronSealing MaterialNBR
Disc MaterialWCB (Cast Steel)Platen MaterialCarbon Steel
Spring MaterialS.S. 316Stem MaterialS.S. 13Cr

Key Advantages

Anti-Water Hammer

Advanced silent design prevents hydraulic shock, protecting pipes from vibration and rupture.

Long-term Durability

Utilizes S.S. 316 springs and 13Cr stems for superior corrosion resistance and longevity.

Global Compliance

Fully certified to API and ASME standards, ensuring seamless integration into international projects.

Precision Sealing

NBR sealing materials ensure a tight, leak-free closure even under varying pressure conditions.

Optimized Flow

Internal geometry is engineered to minimize pressure drop and maximize flow efficiency.

Easy Installation

Standardized flange dimensions allow for rapid installation and replacement in existing lines.

Product Gallery

Flange Type Silent Check Valve China Factory and Leading Suppliers

Management Platforms

Quality Assurance

Strict API 598 testing protocols ensure every valve meets zero-leakage requirements.

Precision Engineering

CNC machining for all critical components to ensure perfect alignment and fit.

Material Tracking

Full traceability of materials from raw ductile iron to finished stainless steel parts.

Customization Support

Tailored material selection available to meet specific chemical or temperature needs.

Logistics Efficiency

Optimized packaging and shipping to ensure safe delivery of heavy-duty valves.

Technical Support

Expert guidance on sizing and selection based on your specific flow parameters.

Investment Return Comparison

FeatureStandard Check ValveSilent Check Valve
Noise LevelHigh (Clattering)Ultra-Low (Silent)
System StressWater Hammer RiskShock Absorption
MaintenanceFrequent AdjustmentsLow Maintenance
Service LifeModerateExtended (Premium Materials)
Overall ROILower due to wearHigher due to reliability

Frequently Asked Questions

Q: What is the main difference between a silent check valve and a swing check valve?

Unlike swing check valves, silent check valves use a spring-loaded mechanism to close the disc before the reverse flow gains momentum, effectively eliminating water hammer and operational noise.

Q: Which international standards does this valve comply with?

Our Flange Type Silent Check Valve is designed and manufactured according to API 594, with flange dimensions following ASME B16.1/EN1092 and testing based on API 598/EN12266.

Q: What materials are used for the spring and stem to prevent corrosion?

We use S.S. 316 for the spring and S.S. 13Cr for the stem and spring gland, ensuring high resistance to oxidation and corrosive industrial fluids.

Q: Can this valve be used for high-pressure applications?

Yes, the valve is designed for PN10 ratings and utilizes a ductile iron body and WCB disc to handle industrial pressure requirements safely.

Q: What is the maximum available size for the Flange Type Silent Check Valve?

Our current production range covers sizes from DN40 up to DN350 (12 inches).

Q: How does the NBR seal impact the valve's performance?

The NBR (Nitrile Butadiene Rubber) sealing provides an excellent tight shut-off, preventing leakage and ensuring the valve remains efficient across various fluid temperatures.

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