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China Ductile Iron Dual Check Valve - Reliable Suppliers and Factory for Double Disc Swing Check Valve Systems
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 fluid flows in only one direction, thereby preventing backflow and protecting pipeline systems from potential damage.
What materials are used for these check valves?
These valves are constructed from high-quality Ductile Iron and Stainless Steel, offering excellent durability and resistance to wear and corrosion.
Which international standards do your check valves conform to?
Our check valves comply with several prominent global standards, including DIN, ANSI, GOST, JIS, and BS, ensuring compatibility across different regional systems.
What media and sizing options are available?
The valves are designed for water and sea water applications. They are available in sizes ranging from DN50 to DN1200, featuring EPDM or NBR rubber seals.
How does a pilot-operated check valve differ from a lift check valve?
A lift check valve relies on gravity and flow direction to move its disc vertically. In contrast, a pilot-operated check valve utilizes a pilot system to control the disc, allowing for rapid response even under minimal pressure differences.