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0102030405

China Ductile Iron Dual Check Valve - Non-Return Spring Type Double Disc Swing Check Valve from Reliable Suppliers & Factory

Introducing our high-performance double disc check valve, available from top-tier China suppliers and manufactured in our state-of-the-art factory. Constructed from robust ductile iron for cost-effectiveness or durable stainless steel for corrosion resistance, this valve is designed to handle a variety of pressure scenarios, Featuring reliable rubber seals, it ensures effective backflow prevention, with a temperature tolerance ranging from -10°C to 90°C. The innovative dual-disc design allows for smooth fluid flow with minimal pressure drop, while the inline mounting facilitates easy installation, Ideal for applications in municipal water lines, industrial pipelines, and chemical transfer systems, our double disc check valve adheres to ISO 7126 standards, guaranteeing consistent and reliable performance. Choose our factory for your check valve needs and experience the quality and reliability that only the best China suppliers can provide

Product Details

Product Specification

Product Name	Check Valve	Material	Ductile Iron/Stainless Steel
Type	Double disc	Medium	Water/Sea water
Size	DN50-DN1200	Seal	EPDM/NBR rubber
Power	Automatic	Standard	DIN/ANSI/GOST/JIS/BS

Product Description

As a key fluid control device, the core function of a check valve is to ensure that the fluid can only flow in one direction.

The lift check valve is a common type. The disc moves up and down perpendicular to the direction of fluid flow. When the fluid flows forward, the disc is lifted up, enabling the fluid to pass. When the fluid flows in the reverse direction, the disc drops to close the passage under its own gravity.

The pilot - operated check valve uses a pilot system to control the opening and closing of the main disc. It can respond quickly under a small pressure difference to effectively control the fluid. This type of check valve is widely used in some occasions with high requirements for control accuracy.

Thanks to their unique functions, check valves play an indispensable role in many industrial processes, effectively avoiding various problems caused by fluid back - flow.

Frequently Asked Questions

What is the primary function of a check valve?

The core function of a check valve is to ensure that fluid flows in only one direction, which effectively prevents various problems caused by back-flow in fluid control systems.

How does a lift check valve work?

In a lift check valve, the disc moves up and down perpendicular to the fluid flow direction. Forward fluid flow lifts the disc to open the passage, while reverse flow drops the disc under its own gravity to shut off the flow.

When is a pilot-operated check valve recommended?

Pilot-operated check valves are ideal for applications requiring high control accuracy. They utilize a pilot system to control the main disc, allowing them to react quickly even under small pressure differences.

What materials and seal types are available for these check valves?

These check valves are constructed from Ductile Iron or Stainless Steel and feature high-quality EPDM or NBR rubber seals to ensure reliable performance.

What standards and sizes do these check valves conform to?

The valves are available in sizes ranging from DN50 to DN1200 and comply with major international standards including DIN, ANSI, GOST, JIS, and BS.