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China Factory Suppliers Stainless Steel Double Disc Check Valve, Non-Return Spring Type with Metal Seal
Product Specification
| Product Name | Check Valve | Material | Stainless Steel |
| Type | Double disc | Medium | Water/Sea water |
| Size | DN50-DN1200 | Seal | Stainless Steel |
| Power | Automatic | Standard | DIN/ANSI/GOST/JIS/BS |
Product Description
Check valves boast diverse material selections tailored to different working conditions. Common options include PVC, brass, and stainless steel. PVC check valves excel in corrosion resistance, making them ideal for low-pressure fluid systems like domestic water pipelines. Brass check valves offer excellent durability and conductivity, suitable for medium-pressure industrial applications. Stainless steel variants stand out in high-temperature and high-pressure environments, such as chemical processing equipment.
In terms of structure, the dual-plate check valve features a compact design with two symmetrical valve discs. This structure reduces flow resistance and ensures quick closing responses. The lift check valve adopts a vertical disc movement structure, which provides tight sealing performance, especially in pipelines with strict leakage requirements.
When it comes to usage, check valves need to be installed in the correct flow direction as indicated by the arrow on the valve body. They should be placed at the outlet of pumps or the end of pipelines to prevent backflow effectively. Regular inspection of valve discs and springs is necessary to maintain their functional reliability.
Their applications cover a wide range of fields. They are extensively applied in water supply and drainage systems to protect water pumps from damage caused by backflow. They also play a key role in sump pump systems, ensuring that pumped water does not flow back into the sump.
Frequently Asked Questions
What materials are check valves commonly made of?
Common options include PVC, brass, and stainless steel. PVC is ideal for low-pressure systems due to its corrosion resistance, brass is suitable for medium-pressure industrial uses, and stainless steel is designed for high-temperature and high-pressure environments.
What are the design advantages of a dual-plate check valve?
A dual-plate check valve features a compact structure with two symmetrical valve discs. This design helps reduce flow resistance and ensures rapid closing responses.
Where and how should check valves be installed?
Check valves must be installed matching the correct flow direction indicated by the arrow on the valve body. They should be positioned at pump outlets or at pipeline ends to prevent backflow.
What maintenance is required for check valves?
To maintain functional reliability, regular inspections of the valve discs and springs are necessary to ensure they operate properly.
What are the key applications for these check valves?
They are widely used in water supply and drainage systems to protect pumps from backflow damage, as well as in sump pump systems to keep pumped water from returning to the sump.
Which international standards do these check valves meet?
These check valves conform to standard specifications including DIN, ANSI, GOST, JIS, and BS.