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China Brass Dual Check Valve Suppliers | Non-Return Spring Rubber Seal Factory for Reliable Backflow Prevention
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.
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.
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
What is the primary function of a check valve?
The primary function of a check valve is to prevent the back-flow of media (such as water or sea water), ensuring the safe and stable operation of the industrial piping system.
How does a swing check valve operate?
A swing check valve features a swingable disc. Forward media flow pushes the disc open to allow passage. When media starts to flow backward, gravity and reverse pressure force the disc to close quickly, blocking the back-flow.
What are the advantages of a double-disc check valve?
A double-disc check valve uses two semi-circular discs that close rapidly when fluid attempts to reverse direction. This design makes the valve compact, lightweight, and easy to install.
What materials and standards do these check valves support?
These valves are manufactured with a brass body and a rubber seal. They support sizes from DN50 to DN1200 and comply with international standards including DIN, ANSI, GOST, JIS, and BS.
Where are these check valves commonly applied?
They are widely applied in industrial systems such as water supply and drainage networks, as well as the petrochemical industry, to protect system operations.