300X Slow-Closing Check Valve
A 300X Slow-Closing Check Valve is a type of check valve designed to prevent backflow in piping systems while ensuring a gradual and controlled closure of the valve disc. This type of valve is often used in water, HVAC, and various industrial systems where preventing backflow and controlling water hammer is critical.
300X Slow-Closing Check Valve
The 300X Slow-Closing Check Valve is a hydraulically controlled valve specifically designed to prevent water hammer and reverse flow in pumping systems and water distribution networks. The valve automatically opens when the pump starts and gradually closes in two stages when the pump stops, effectively eliminating pressure surges caused by sudden flow reversal.
The valve utilizes hydraulic control technology and an adjustable slow-closing mechanism to ensure stable operation, protect pumps, pipelines, and system components, and extend the service life of the entire network. It is widely used in municipal water supply systems, pumping stations, irrigation projects, hydropower facilities, industrial water systems, and wastewater treatment plants.
As a professional control valve manufacturer, we provide comprehensive OEM and ODM services for municipal infrastructure and industrial projects worldwide.
Body Materials
Internal Components
Seal Materials
Hydraulic Control Components
Our products are manufactured in accordance with international quality standards and hydraulic control valve requirements.
Parameter Specifications
| Item | Specification |
|---|---|
| Product Name | 300X Slow-Closing Check Valve |
| Valve Type | Hydraulic Slow-Closing Check Valve |
| Nominal Size | DN50–DN2000 (2"–80") |
| Pressure Rating | PN10, PN16, PN25, PN40 |
| Body Material | Ductile Iron, Carbon Steel, SS304, SS316 |
| Disc Material | Stainless Steel, Ductile Iron |
| Stem Material | Stainless Steel 304/316 |
| Seal Material | EPDM, NBR, Viton |
| Connection Type | Flanged |
| Flange Standard | ANSI, DIN, EN, JIS, AWWA, GB/T |
| Operating Temperature | 0°C to +80°C |
| Maximum Working Pressure | Up to 4.0 MPa |
| Closing Mode | Two-Stage Slow Closing |
| Control Type | Hydraulic Automatic Control |
| Closing Time | Adjustable (3–120 Seconds) |
| Leakage Rate | ISO 5208 Rate A |
| Design Standard | EN 1074, AWWA C508 |
| Face-to-Face Standard | EN 558 |
| Inspection & Testing | API 598, EN 12266 |
| Surface Coating | Fusion Bonded Epoxy (FBE) |
| Applicable Media | Water, Raw Water, Treated Water, Seawater |
Industry Applications
Material customization plan
Customized 316L stainless steel valves forGerman chemical enterprises. Resistant tostrong corrosion, suitable for their acidicmedium transportation systems, with aservice life extended to over 8 years.
Structural optimization design
For the Saudi desert project, the valve stemsealing structure was changed to a doublebellows design to address the leakage issuein the high-temperature and dustyenvironment, and it was highly recognizedby the customers.
Interface standard adaptation
Customized API 600 standard valves for acertain company in the United States. Theflange size is fully compatible with ANSIB16.5, ensuring zero error during on-siteinstallation and reducing the constructionperiod by 30%.
