ダクタイル鋳鉄製ゴムディスク逆止弁

A check valve, also known as a one-way valve or non-return valve, is an automatic valve that prevents the reverse flow of media in pipelines. It protects pipelines, pumps, compressors and other equipment from impact damage caused. This product is ideal for applications in the chemical, petrochemical, oil and natural gas industries.

Product Profile

Full-size precision machining technology is applied to key components such as the ductile iron rubber disc check valve body, disc, and sealing surface, ensuring high dimensional accuracy and surface finish of all parts.

Premium materials and advanced processes are used to provide excellent wear, corrosion, and fatigue resistance, significantly extending service life under various working conditions and reducing maintenance and replacement costs.

Ductile iron rubber disc check valves are generally suitable for clean media and are not suitable for media containing solid particles or high viscosity.

A full-process quality management system is strictly implemented from raw material intake to finished product delivery, ensuring every production stage meets or exceeds national and industry standards.

We specialize in the in-depth R&D and manufacturing of CNC machined parts and check valve, leveraging professional expertise and proven experience to deliver high-performance, highly reliable solutions with every product.

Specification

Application Scenarios Of Ductile Iron Rubber Disc Check Valve

Install Haozhifeng® Ductile Iron Rubber Disc Check Valve at the outlet of a water pump to prevent water in the pipeline network from flowing back into the pump body after the pump shuts down. This protects the pump impeller from damage caused by reverse rotation, maintains residual pressure in the pipeline network, and reduces energy consumption during restart.

Ductile Iron Rubber Disc Check Valves are installed in the water supply pipelines and fire-fighting pipelines of high-rise residential buildings. They prevent water from flowing back from low-rise pipelines, ensuring stable water supply pressure for high-rise floors; in fire-fighting systems, they also prevent water in the fire pipeline network from flowing back after the fire pump stops operating.

These check valves are installed between pumping stations of long-distance transmission pipelines and at the inlet and outlet of storage tanks to prevent medium backflow caused by pressure fluctuations.

Check valves are applied in natural gas pipelines, pressure regulating stations and storage tank interfaces to prevent natural gas backflow that may trigger leakage or explosion risks. They also serve as critical safety components in the loading, unloading and transmission systems of LNG.

In thermal power plants, Ductile Iron Rubber Disc Check Valves are installed in the water supply pipelines and steam pipelines of boilers to prevent backflow of feedwater or steam, ensuring stable water level and pressure in the boilers. Check valves are also mounted on the extraction steam pipelines of steam turbines to avoid steam backflow that could impair turbine operating efficiency.

Installed at the water inlet pipelines of water turbines in hydropower stations, these valves prevent water from flowing back and impacting turbine blades after unit shutdown, while avoiding backflow of downstream water levels.In nuclear power plants, high-performance Ductile Iron Rubber Disc Check Valves are installed in key pipelines such as coolant circulation systems to prevent coolant backflow and ensure the safe operation of nuclear reactors.

Industrial Manufacturing and Mechanical Equipment Sector

Check valves can also be installed at the exhaust ports of compressors to prevent compressed air from flowing back into the cylinders, avoiding excessive load during compressor startup and maintaining pressure in the air storage tanks.

Ductile iron rubber disc check valves are fitted in the fuel delivery pipelines and cooling water pipelines of ships to prevent medium backflow that may affect engine operation; in ballast water systems, they are used to control the inflow and outflow direction of seawater, avoiding ballast water backflow that could compromise ship stability.

These valves are applied in the transmission pipelines and water injection pipelines of oil and gas extraction platforms. They resist harsh marine conditions such as high pressure and corrosion, prevent medium backflow, and ensure safe extraction operations.

FAQ

Q1: Can you provide samples before I place an order?

A1: Yes, we are happy to send you samples for quality testing. The sample fee will be fully refunded when you place a bulk order, and you only need to cover the shipping costs.

Q2: What are your main products?

A2: We are a professional manufacturer with over 20 years of experience, specializing in CNC machining parts and valves.

Q3: What materials are used in the Haozhifeng®’s check valve?

A3: The main body of the valve is made of high-quality ductile iron, which ensures excellent strength and corrosion resistance.

Q4: Can I customize the check valve according to my pipeline parameters?

A4: Yes, we provide comprehensive customization services. We can adjust the valve's size, pressure rating, flange standard.