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Brass Dual Check Valve Non-Return Spring Rubber Seal.jpg

Brass Dual Check Valve Non-Return Spring Rubber Seal - Quality China Suppliers & Factory for Backflow Prevention

Introducing our high-quality double disc check valve, expertly fabricated from premium brass, ensuring excellent corrosion resistance and exceptional mechanical durability for moderate-pressure systems. As a reliable solution for backflow prevention, this valve features rubber sealing discs that guarantee leak-tight performance. With a temperature range adaptability from -5°C to 80°C, it is perfect for diverse applications. Our compact dual-disc structure allows for smooth fluid flow with minimal pressure loss, facilitating easy inline installation. Trusted by water supply, HVAC, and light industrial pipelines, this product meets the strict API 594 standards, promoting consistent, low-maintenance operation. As a leading factory in China, we are committed to providing top-quality valves, making us the preferred choice among suppliers.

Product Details

Product Specification

Product Name	Check Valve	Material	Brass
Type	Double disc	Medium	Water/Sea water
Size	DN50-DN1200	Seal	Rubber
Power	Automatic	Standard	DIN/ANSI/GOST/JIS/BS

Product Description

Check valves are crucial types of valves in industrial systems. Their primary function is to prevent the back - flow of media, ensuring the safe and stable operation of the system.

Swing Check Valve

A common type is the swing check valve. It has a swingable disc. When the media flows in the forward direction, the disc is pushed open, allowing the media to pass through. However, when there is a tendency for the media to flow back, the disc quickly closes under the action of gravity and the reverse pressure of the media to prevent back - flow.

Double - Disc Check Valve

The double - disc check valve consists of two semi - circular discs. When the fluid flows forward, the discs open and the fluid passes smoothly. Once the fluid tries to flow in the reverse direction, the two discs close rapidly. This structure makes the double - disc check valve small in size, light in weight and easy to install.

Check valves are widely used in fields such as water supply and drainage, and petrochemical industry, safeguarding the normal operation of various systems.

Frequently Asked Questions (FAQ)

Q1 What is the primary function of a Brass Double Disc Check Valve?

The primary function is to prevent media backflow automatically. It allows fluid to pass freely in the forward direction and rapidly closes when flow reverses, protecting pumps and pipeline systems from damage.

Q2 What are the main advantages of a double-disc design compared to swing check valves?

The double-disc structure uses two semi-circular spring-loaded plates. This makes the valve significantly more compact, lighter in weight, easier to install, and faster to close, which effectively minimizes water hammer effects.

Q3 Which media and industries are these check valves suitable for?

Constructed from durable brass with rubber sealing, these valves are suitable for water and seawater media. They are widely applied in municipal water supply, drainage, and petrochemical industrial systems.

Q4 What size ranges and international manufacturing standards are supported?

Our check valves cover nominal diameters from DN50 to DN1200 and comply with international pipeline standards including DIN, ANSI, GOST, JIS, and BS.

Q5 Does this check valve require an external power supply to operate?

No, it operates completely automatically. The discs are pushed open by the fluid pressure in forward flow and closed by reverse pressure and spring action without needing external actuation or power.