Silent Check Valve
The Test Torque for a Silent Check Valve typically depends on the Nominal Diameter (DN), pressure rating (PN), and the valve's specific design. The Test Torque is used to assess the torque required to operate the valve, especially during the closing action, to ensure smooth operation and prevent water hammer.
Silent Check Valve
The Silent Check Valve is a non-slam, spring-assisted check valve specifically designed to prevent reverse flow while eliminating water hammer and flow noise in pipeline systems. Unlike conventional swing check valves, the silent check valve utilizes a spring-loaded disc that closes rapidly before flow reversal occurs, effectively reducing hydraulic shock and protecting pumps, pipelines, and related equipment.
With its streamlined flow path, compact structure, low pressure loss, and quiet operation, the valve is widely used in water supply systems, HVAC networks, pumping stations, fire protection systems, industrial process pipelines, and high-rise building water systems.
As a professional valve manufacturer, we provide comprehensive OEM and ODM services for global infrastructure and industrial projects.
Body Materials
Disc Materials
Spring Materials
Seal Materials
Our products are manufactured according to international quality standards and valve industry requirements.
Parameter Specifications
| Item | Specification |
|---|---|
| Product Name | Silent Check Valve |
| Valve Type | Spring-Assisted Non-Slam Check Valve |
| Nominal Size | DN40–DN1200 (1½"–48") |
| Pressure Rating | PN10, PN16, PN25, PN40 |
| Body Material | Cast Iron, Ductile Iron, Carbon Steel, SS304, SS316 |
| Disc Material | SS304, SS316, Bronze, Epoxy-Coated Ductile Iron |
| Spring Material | SS304, SS316, Inconel |
| Seal Material | EPDM, NBR, Viton, PTFE |
| Connection Type | Wafer, Flanged, Threaded |
| Flange Standard | ANSI, DIN, EN, JIS, GB/T |
| Operating Temperature | -20°C to +200°C |
| Maximum Working Pressure | Up to 4.0 MPa |
| Cracking Pressure | 0.02–0.05 MPa |
| Installation Position | Horizontal or Vertical |
| Closing Mechanism | Spring-Assisted Rapid Closing |
| Leakage Rate | ISO 5208 Rate A |
| Design Standard | API 594, EN 16767 |
| Face-to-Face Standard | API 594 |
| Inspection & Testing | API 598, EN 12266 |
| Surface Coating | Fusion Bonded Epoxy (FBE) |
| Applicable Media | Water, Air, Gas, Oil, Steam, Neutral Liquids |
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%.
